TY  - CONF
AU  - Simić, Marija
AU  - Petrović, Jelena
AU  - Ercegović, Marija
AU  - Koprivica, Marija
AU  - Dimitrijević, Jelena
AU  - Jovanović, Aleksandar
AU  - Milojkov, Dušan
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/680
AB  - The corn cob was investigated as available agrowaste material for the production of potential efficient material for heavy
metals removal. The hydrothermal carbonization (HTC) technology is one of the appropriate methods for biomass
transformation into high-value carbonaceous products than can be utilized as adsorbents. In this study, modified pyrohydrochar
derived from corn cob (MCC) was effectively prepared by modification with Mg-Fe solution and pyrolysis.
This material was used for Pb ions removal from aqueous solutions. The effect of solution pH, contact time and initial Pb
concentration were examined in batch system. The achieved results revealed that the most effective Pb adsorption take
place at pH 5. The experimental results were fitted to Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models.
The best data fit was achieved with the Sips isotherm model with maximum adsorption capacity for Pb removal of 214.9
mg/g. Additionally, the experimentally results from kinetic study were fitted by pseudo-first and pseudo-second order
models. According to kinetic parameters, the Pb removal using MCC follows pseudo-second order model, which assumes
that chemical interaction between Pb ions and functional groups on the MCC surface was involved in metal adsorption.
According to data from this investigation and in comparisons to other adsorbents can be concluded that investigated
material can be used as potential suitable adsorbent of Pb from aqueous solutions.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Mg/Fe-pyro-hydro char derived from corn cob as effective adsorbent of lead removal from aqueous solutions
EP  - 364
SP  - 359
ER  - 

@conference{
author = "Simić, Marija and Petrović, Jelena and Ercegović, Marija and Koprivica, Marija and Dimitrijević, Jelena and Jovanović, Aleksandar and Milojkov, Dušan",
year = "2023",
abstract = "The corn cob was investigated as available agrowaste material for the production of potential efficient material for heavy
metals removal. The hydrothermal carbonization (HTC) technology is one of the appropriate methods for biomass
transformation into high-value carbonaceous products than can be utilized as adsorbents. In this study, modified pyrohydrochar
derived from corn cob (MCC) was effectively prepared by modification with Mg-Fe solution and pyrolysis.
This material was used for Pb ions removal from aqueous solutions. The effect of solution pH, contact time and initial Pb
concentration were examined in batch system. The achieved results revealed that the most effective Pb adsorption take
place at pH 5. The experimental results were fitted to Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models.
The best data fit was achieved with the Sips isotherm model with maximum adsorption capacity for Pb removal of 214.9
mg/g. Additionally, the experimentally results from kinetic study were fitted by pseudo-first and pseudo-second order
models. According to kinetic parameters, the Pb removal using MCC follows pseudo-second order model, which assumes
that chemical interaction between Pb ions and functional groups on the MCC surface was involved in metal adsorption.
According to data from this investigation and in comparisons to other adsorbents can be concluded that investigated
material can be used as potential suitable adsorbent of Pb from aqueous solutions.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Mg/Fe-pyro-hydro char derived from corn cob as effective adsorbent of lead removal from aqueous solutions",
pages = "364-359"
}

Simić, M., Petrović, J., Ercegović, M., Koprivica, M., Dimitrijević, J., Jovanović, A.,& Milojkov, D.. (2023). Mg/Fe-pyro-hydro char derived from corn cob as effective adsorbent of lead removal from aqueous solutions. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 359-364.

Simić M, Petrović J, Ercegović M, Koprivica M, Dimitrijević J, Jovanović A, Milojkov D. Mg/Fe-pyro-hydro char derived from corn cob as effective adsorbent of lead removal from aqueous solutions. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:359-364..

Simić, Marija, Petrović, Jelena, Ercegović, Marija, Koprivica, Marija, Dimitrijević, Jelena, Jovanović, Aleksandar, Milojkov, Dušan, "Mg/Fe-pyro-hydro char derived from corn cob as effective adsorbent of lead removal from aqueous solutions" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):359-364.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Mraković, Ana
AU  - Jovanović, Gvozden
AU  - Vuković, Nikola
AU  - Bugarčić, Mladen
AU  - Antanasković, Anja
AU  - Živković-Radovanović, Vukosava
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1185
AB  - Magnetic iron oxide nanomaterials, which enable a multitude of uses, are given special focus in the fields of biomedicine and environmental protection. The detection, sorption, and/or degradation of inorganic (lead, chromium, arsenic, and cadmium), organic (dyes, pharmaceuticals, pesticides, phenols, and benzene), and biological (viruses and bacteria) pollutants can all be effectively accomplished with the use of magnetic nanoparticles. Magnetic iron oxide nanomaterials are in particular focus for use as hyperthermia media in cancer treatment and as magnetic resonance imaging (MRI) contrast agents. The possibility of magnetic separation of such materials, due to their essential properties under the influence of an external magnetic field, reduces production costs and also prevents the production and accumulation of toxic waste. Among the many metal oxide nanomaterials, magnetite (Fe3O4) and maghemite (γ-Fe2O3) are currently the only two magnetic materials approved by the US Food and Drug Administration (FDA) for human use as iron deficiency therapeutics and as contrast agents for MRI. Here, we synthesized nanoparticles of magnetite (Fe3O4) by the method of reduction-precipitation and characterized. Additionally, potential binding of brilliant green dye on Fe3O4 and construction of innovative magnetic composite was investigated. The physicochemical features were explored using X-ray diffraction (XRD), 
Fourier-transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). XRD analysis confirms formation of the crystal phase of magnetite. The presence of magnetite nanoparticles is shown by typical groups for the peaks of iron compounds at a lower wavelength (≤ 700 cm-1) that are characteristic of the Fe-O bond. Morphological analyzes with FESEM showed that magnetite is a composite of nanospheres and nanorods that provide a large surface area. Dye binding study was performed using UV visible and FTIR spectrometer.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Twenty-First Young Researchers’ Conference - Materials Science and Engineering
T1  - Nanofabrication and characterisation of magnetic Fe3O4 nanostructures  for potential environmental and biomedical applications
EP  - 14
SP  - 14
ER  - 

@conference{
author = "Milojkov, Dušan and Mraković, Ana and Jovanović, Gvozden and Vuković, Nikola and Bugarčić, Mladen and Antanasković, Anja and Živković-Radovanović, Vukosava",
year = "2023",
abstract = "Magnetic iron oxide nanomaterials, which enable a multitude of uses, are given special focus in the fields of biomedicine and environmental protection. The detection, sorption, and/or degradation of inorganic (lead, chromium, arsenic, and cadmium), organic (dyes, pharmaceuticals, pesticides, phenols, and benzene), and biological (viruses and bacteria) pollutants can all be effectively accomplished with the use of magnetic nanoparticles. Magnetic iron oxide nanomaterials are in particular focus for use as hyperthermia media in cancer treatment and as magnetic resonance imaging (MRI) contrast agents. The possibility of magnetic separation of such materials, due to their essential properties under the influence of an external magnetic field, reduces production costs and also prevents the production and accumulation of toxic waste. Among the many metal oxide nanomaterials, magnetite (Fe3O4) and maghemite (γ-Fe2O3) are currently the only two magnetic materials approved by the US Food and Drug Administration (FDA) for human use as iron deficiency therapeutics and as contrast agents for MRI. Here, we synthesized nanoparticles of magnetite (Fe3O4) by the method of reduction-precipitation and characterized. Additionally, potential binding of brilliant green dye on Fe3O4 and construction of innovative magnetic composite was investigated. The physicochemical features were explored using X-ray diffraction (XRD), 
Fourier-transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). XRD analysis confirms formation of the crystal phase of magnetite. The presence of magnetite nanoparticles is shown by typical groups for the peaks of iron compounds at a lower wavelength (≤ 700 cm-1) that are characteristic of the Fe-O bond. Morphological analyzes with FESEM showed that magnetite is a composite of nanospheres and nanorods that provide a large surface area. Dye binding study was performed using UV visible and FTIR spectrometer.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Twenty-First Young Researchers’ Conference - Materials Science and Engineering",
title = "Nanofabrication and characterisation of magnetic Fe3O4 nanostructures  for potential environmental and biomedical applications",
pages = "14-14"
}

Milojkov, D., Mraković, A., Jovanović, G., Vuković, N., Bugarčić, M., Antanasković, A.,& Živković-Radovanović, V.. (2023). Nanofabrication and characterisation of magnetic Fe3O4 nanostructures  for potential environmental and biomedical applications. in Twenty-First Young Researchers’ Conference - Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA., 14-14.

Milojkov D, Mraković A, Jovanović G, Vuković N, Bugarčić M, Antanasković A, Živković-Radovanović V. Nanofabrication and characterisation of magnetic Fe3O4 nanostructures  for potential environmental and biomedical applications. in Twenty-First Young Researchers’ Conference - Materials Science and Engineering. 2023;:14-14..

Milojkov, Dušan, Mraković, Ana, Jovanović, Gvozden, Vuković, Nikola, Bugarčić, Mladen, Antanasković, Anja, Živković-Radovanović, Vukosava, "Nanofabrication and characterisation of magnetic Fe3O4 nanostructures  for potential environmental and biomedical applications" in Twenty-First Young Researchers’ Conference - Materials Science and Engineering (2023):14-14.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Marković, Gordana
AU  - Sokić, Miroslav
AU  - Manojlović, Vaso
AU  - Mutavdžić, Dragosav
AU  - Janjić, Goran
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/933
AB  - Fluorapatite (FAP) crystals have drawn significant interest over the last few decades as important hosts matrix for optically active trivalent rare earth ions, due to the strong crystal field splitting and large transition cross-sections. Nano-sized FAP particles doped with rare earth ions have been extensively studied as luminescent materials for biomedical applications for cell labeling and bioimaging, as well as antimicrobial agents for therapeutics.
Fluorapatite nanoparticles doped with praseodymium ions (Pr3+) were prepared by the co precipitation method and characterized. The different number of Pr3+ (4f2) transitions in the ultraviolet and visible parts of the spectrum was investigated by photoluminescence spectroscopy. Multivariate Curve Resolution–Alternating Least Squares (MCR-ALS) analyses of fluorescence spectra and ab initio calculation indicated that Pr3+ ions are 
preferentially substituted Ca2 (6h) sites in FAP lattice. In addition to the substitution of cations, there is also the substitution of anionic species such as OH-, CO32-, and NO3-, which are confirmed by the CHNS method. The obtained samples were tested as bioimaging and 
antibacterial agents and can potentially be used for further biomedical research.
PB  - Belgrade : Serbian Ceramic Society
C3  - The Eleventh Serbian Ceramic Society Conference »ADVANCED CERAMICS AND APPLICATION XI«"
T1  - Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application
EP  - 39
SP  - 38
ER  - 

@conference{
author = "Milojkov, Dušan and Marković, Gordana and Sokić, Miroslav and Manojlović, Vaso and Mutavdžić, Dragosav and Janjić, Goran",
year = "2023",
abstract = "Fluorapatite (FAP) crystals have drawn significant interest over the last few decades as important hosts matrix for optically active trivalent rare earth ions, due to the strong crystal field splitting and large transition cross-sections. Nano-sized FAP particles doped with rare earth ions have been extensively studied as luminescent materials for biomedical applications for cell labeling and bioimaging, as well as antimicrobial agents for therapeutics.
Fluorapatite nanoparticles doped with praseodymium ions (Pr3+) were prepared by the co precipitation method and characterized. The different number of Pr3+ (4f2) transitions in the ultraviolet and visible parts of the spectrum was investigated by photoluminescence spectroscopy. Multivariate Curve Resolution–Alternating Least Squares (MCR-ALS) analyses of fluorescence spectra and ab initio calculation indicated that Pr3+ ions are 
preferentially substituted Ca2 (6h) sites in FAP lattice. In addition to the substitution of cations, there is also the substitution of anionic species such as OH-, CO32-, and NO3-, which are confirmed by the CHNS method. The obtained samples were tested as bioimaging and 
antibacterial agents and can potentially be used for further biomedical research.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "The Eleventh Serbian Ceramic Society Conference »ADVANCED CERAMICS AND APPLICATION XI«"",
title = "Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application",
pages = "39-38"
}

Milojkov, D., Marković, G., Sokić, M., Manojlović, V., Mutavdžić, D.,& Janjić, G.. (2023). Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application. in The Eleventh Serbian Ceramic Society Conference »ADVANCED CERAMICS AND APPLICATION XI«"
Belgrade : Serbian Ceramic Society., 38-39.

Milojkov D, Marković G, Sokić M, Manojlović V, Mutavdžić D, Janjić G. Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application. in The Eleventh Serbian Ceramic Society Conference »ADVANCED CERAMICS AND APPLICATION XI«". 2023;:38-39..

Milojkov, Dušan, Marković, Gordana, Sokić, Miroslav, Manojlović, Vaso, Mutavdžić, Dragosav, Janjić, Goran, "Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application" in The Eleventh Serbian Ceramic Society Conference »ADVANCED CERAMICS AND APPLICATION XI«" (2023):38-39.

TY  - CONF
AU  - Marković, Gordana
AU  - Manojlović, Vaso
AU  - Sokić, Miroslav
AU  - Ruzic, Jovana
AU  - Milojkov, Dušan
AU  - Patarić, Aleksandra
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/927
AB  - Titanium alloys are widely employed in various fields, particularly in biomedical engineering, due to their mechanical  and corrosion resistance properties combined with good biocompatibility. The modulus of elasticity is a distinguishing  feature of this group of materials compared to others used for similar purposes. A database of approximately 238 titanium alloys free of toxic elements was compiled for this study. The influence of different factors (such as alloy element  proportions, density, and specific heat) on the modulus of elasticity was predicted using four methods: support vector machine, XGBoost, Neural Network, and Random Forest. The Random Forest mean absolute error (MAE) of 7.33 GPa, falls within the range of experimentally obtained absolute errors in the literature (up to about 11 GPa). A strong correlation (R2 = 0.72) was observed between experimental and predicted data. Lastly, specific alloying element regions were identified for the modulus of elasticity, which can be used to design new biocompatible titanium alloys in the future.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning
EP  - 158
SP  - 154
ER  - 

@conference{
author = "Marković, Gordana and Manojlović, Vaso and Sokić, Miroslav and Ruzic, Jovana and Milojkov, Dušan and Patarić, Aleksandra",
year = "2023",
abstract = "Titanium alloys are widely employed in various fields, particularly in biomedical engineering, due to their mechanical  and corrosion resistance properties combined with good biocompatibility. The modulus of elasticity is a distinguishing  feature of this group of materials compared to others used for similar purposes. A database of approximately 238 titanium alloys free of toxic elements was compiled for this study. The influence of different factors (such as alloy element  proportions, density, and specific heat) on the modulus of elasticity was predicted using four methods: support vector machine, XGBoost, Neural Network, and Random Forest. The Random Forest mean absolute error (MAE) of 7.33 GPa, falls within the range of experimentally obtained absolute errors in the literature (up to about 11 GPa). A strong correlation (R2 = 0.72) was observed between experimental and predicted data. Lastly, specific alloying element regions were identified for the modulus of elasticity, which can be used to design new biocompatible titanium alloys in the future.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning",
pages = "158-154"
}

Marković, G., Manojlović, V., Sokić, M., Ruzic, J., Milojkov, D.,& Patarić, A.. (2023). Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 154-158.

Marković G, Manojlović V, Sokić M, Ruzic J, Milojkov D, Patarić A. Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:154-158..

Marković, Gordana, Manojlović, Vaso, Sokić, Miroslav, Ruzic, Jovana, Milojkov, Dušan, Patarić, Aleksandra, "Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):154-158.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Sokić, Miroslav
AU  - Mitrović, Angelina
AU  - Smiljanić, Danijela
AU  - Petrović, Jelena
AU  - Simić, Marija
AU  - Živković-Radovanović, Vukosava
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/988
AB  - The accumulation of mine tailings in the mining area of Majdanpek represents a serious environmental problem. A strong impetus for the development of sustainable methods for the recovery of metals from mine tailings is given by the importance of heavy metal recovery and the economic benefits of precious and base metals. Currently, researchers are working to develop metals recovery from tailings through bioleaching, which is a more sustainable method compared to traditional metallurgical methods. Biotechnologies for leaching heavy metals from old flotation tailings (Majdanpek, Serbia) with fungus Aspergillus niger (A. niger) are discussed in this paper. The subject of this research is iron ions, since the tailings are the richest in this metal. With a simple bioleaching process, which is based on the cultivation of A. niger in the basic growth medium and then challenging it with tailings, 5% iron was released in 35 days. The transformation of mine tailings morphology was also confirmed by optical microscopy. Processes by which A. niger extracts metals from
tailings include acidolysis, complexation, alkaloysis and biosorption. Also, in addition to metabolites, these fungi produce spores and mycelium that can destroy material and transform it to the soil. Given that Serbia is abundant with agricultural
waste, as well as waste from the food industry, in future studies cheap waste should be used as an energy input source for A. niger and transformation of tailings.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Development of sustainable method for metal recovery from old flotation tailings (Majdanpek, Serbia) using Aspergillus niger fungus
EP  - 330
SP  - 325
ER  - 

@conference{
author = "Milojkov, Dušan and Sokić, Miroslav and Mitrović, Angelina and Smiljanić, Danijela and Petrović, Jelena and Simić, Marija and Živković-Radovanović, Vukosava",
year = "2023",
abstract = "The accumulation of mine tailings in the mining area of Majdanpek represents a serious environmental problem. A strong impetus for the development of sustainable methods for the recovery of metals from mine tailings is given by the importance of heavy metal recovery and the economic benefits of precious and base metals. Currently, researchers are working to develop metals recovery from tailings through bioleaching, which is a more sustainable method compared to traditional metallurgical methods. Biotechnologies for leaching heavy metals from old flotation tailings (Majdanpek, Serbia) with fungus Aspergillus niger (A. niger) are discussed in this paper. The subject of this research is iron ions, since the tailings are the richest in this metal. With a simple bioleaching process, which is based on the cultivation of A. niger in the basic growth medium and then challenging it with tailings, 5% iron was released in 35 days. The transformation of mine tailings morphology was also confirmed by optical microscopy. Processes by which A. niger extracts metals from
tailings include acidolysis, complexation, alkaloysis and biosorption. Also, in addition to metabolites, these fungi produce spores and mycelium that can destroy material and transform it to the soil. Given that Serbia is abundant with agricultural
waste, as well as waste from the food industry, in future studies cheap waste should be used as an energy input source for A. niger and transformation of tailings.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Development of sustainable method for metal recovery from old flotation tailings (Majdanpek, Serbia) using Aspergillus niger fungus",
pages = "330-325"
}

Milojkov, D., Sokić, M., Mitrović, A., Smiljanić, D., Petrović, J., Simić, M.,& Živković-Radovanović, V.. (2023). Development of sustainable method for metal recovery from old flotation tailings (Majdanpek, Serbia) using Aspergillus niger fungus. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 325-330.

Milojkov D, Sokić M, Mitrović A, Smiljanić D, Petrović J, Simić M, Živković-Radovanović V. Development of sustainable method for metal recovery from old flotation tailings (Majdanpek, Serbia) using Aspergillus niger fungus. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:325-330..

Milojkov, Dušan, Sokić, Miroslav, Mitrović, Angelina, Smiljanić, Danijela, Petrović, Jelena, Simić, Marija, Živković-Radovanović, Vukosava, "Development of sustainable method for metal recovery from old flotation tailings (Majdanpek, Serbia) using Aspergillus niger fungus" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):325-330.

TY  - CONF
AU  - Marković, Gordana
AU  - Manojlović, Vaso
AU  - Sokić, Miroslav
AU  - Ruzic, Jovana
AU  - Milojkov, Dušan
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1216
AB  - This study examines the potential of high-entropy alloys (HEAs) as promising biomaterials, with a specific
focus on the development of alloys with a low Young's modulus. Utilizing Monte Carlo simulations coupled
with machine learning techniques, the research identifies critical variables that significantly influence the
Young’s modulus, uncovering a notable correlation between specific heat and the elastic properties of the
alloys. The validation of the Extra Trees Regressor as a reliable predictive model in this study, furthermore,
facilitates the identification of promising HEAs with tailored properties. These findings provide significant
insights that are expected to guide future progresses in the development of HEAs as advanced biomaterials.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - The 54th International October Conference on Mining and Metallurgy
T1  - Designing biocompatible high entropy alloys using Monte Carlo simulations
EP  - 530
SP  - 527
ER  - 

@conference{
author = "Marković, Gordana and Manojlović, Vaso and Sokić, Miroslav and Ruzic, Jovana and Milojkov, Dušan",
year = "2023",
abstract = "This study examines the potential of high-entropy alloys (HEAs) as promising biomaterials, with a specific
focus on the development of alloys with a low Young's modulus. Utilizing Monte Carlo simulations coupled
with machine learning techniques, the research identifies critical variables that significantly influence the
Young’s modulus, uncovering a notable correlation between specific heat and the elastic properties of the
alloys. The validation of the Extra Trees Regressor as a reliable predictive model in this study, furthermore,
facilitates the identification of promising HEAs with tailored properties. These findings provide significant
insights that are expected to guide future progresses in the development of HEAs as advanced biomaterials.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "The 54th International October Conference on Mining and Metallurgy",
title = "Designing biocompatible high entropy alloys using Monte Carlo simulations",
pages = "530-527"
}

Marković, G., Manojlović, V., Sokić, M., Ruzic, J.,& Milojkov, D.. (2023). Designing biocompatible high entropy alloys using Monte Carlo simulations. in The 54th International October Conference on Mining and Metallurgy
Bor : University of Belgrade, Technical Faculty in Bor., 527-530.

Marković G, Manojlović V, Sokić M, Ruzic J, Milojkov D. Designing biocompatible high entropy alloys using Monte Carlo simulations. in The 54th International October Conference on Mining and Metallurgy. 2023;:527-530..

Marković, Gordana, Manojlović, Vaso, Sokić, Miroslav, Ruzic, Jovana, Milojkov, Dušan, "Designing biocompatible high entropy alloys using Monte Carlo simulations" in The 54th International October Conference on Mining and Metallurgy (2023):527-530.

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Radosavljević-Mihajlović, Ana
AU  - Stanić, Vojislav
AU  - Nastasijević, B.J.
AU  - Radotić, Ksenija
AU  - Janković-Častvan, Ivona
AU  - Živković-Radovanović, Vukosava
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/653
AB  - Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure. Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F− ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–spectrum antimicrobial agents for various biomedical and health care preparations.
PB  - Elsevier B.V.
T2  - Journal of Photochemistry and Photobiology B: Biology
T1  - Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents
VL  - 239
DO  - 10.1016/j.jphotobiol.2023.112649
UR  - conv_984
ER  - 

@article{
author = "Milojkov, Dušan and Radosavljević-Mihajlović, Ana and Stanić, Vojislav and Nastasijević, B.J. and Radotić, Ksenija and Janković-Častvan, Ivona and Živković-Radovanović, Vukosava",
year = "2023",
abstract = "Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure. Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F− ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–spectrum antimicrobial agents for various biomedical and health care preparations.",
publisher = "Elsevier B.V.",
journal = "Journal of Photochemistry and Photobiology B: Biology",
title = "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents",
volume = "239",
doi = "10.1016/j.jphotobiol.2023.112649",
url = "conv_984"
}

Milojkov, D., Radosavljević-Mihajlović, A., Stanić, V., Nastasijević, B.J., Radotić, K., Janković-Častvan, I.,& Živković-Radovanović, V.. (2023). Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry and Photobiology B: Biology
Elsevier B.V.., 239.
https://doi.org/10.1016/j.jphotobiol.2023.112649
conv_984

Milojkov D, Radosavljević-Mihajlović A, Stanić V, Nastasijević B, Radotić K, Janković-Častvan I, Živković-Radovanović V. Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry and Photobiology B: Biology. 2023;239.
doi:10.1016/j.jphotobiol.2023.112649
conv_984 .

Milojkov, Dušan, Radosavljević-Mihajlović, Ana, Stanić, Vojislav, Nastasijević, B.J., Radotić, Ksenija, Janković-Častvan, Ivona, Živković-Radovanović, Vukosava, "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents" in Journal of Photochemistry and Photobiology B: Biology, 239 (2023),
https://doi.org/10.1016/j.jphotobiol.2023.112649 .,
conv_984 .

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Mitrović, Angelina
AU  - Smiljanić, Danijela
AU  - Jovanović, Gvozden
AU  - Sokić, Miroslav
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/651
AB  - Naučnici su otkrili plastiku ranih 1900-ih, ali nisu shvatili kakve štetne efekte njena fragmentacija može imati na životnu sredinu 100 godina kasnije. Konkretno, čestice nanoplastike (NP) veličine od 1 do 100 nm mogu izazvati velike probleme u živom svetu zbog svoje velike specifične površine za adsorpciju drugih zagađujućih materija iz vode i njihove dalje bioakumulacije kroz lanac ishrane. Ne postoji poseban metod za identifikaciju, karakterizaciju i kvantifikaciju nanoplastike u vodenoj sredini. Iako mnoge metode razvijene za proučavanje mikroplastike nisu direktno primenljive na nanoplastiku, konvencionalne metode karakterizacije nanoplastike su obično zamorne jer proučavaju pojedinačne nanočestice u izolaciji. Pošto nanoplastika koja je rezultat razgradnje mikroplastike ima drugačija svojstva od sintetisanih plastičnih nanočestica, potrebno je razviti nove tehnike koje će nam pomoći da bolje razumemo ozbiljnost problema nanoplastike. Nanoplastika se može izolovati iz vodenog okruženja kombinacijom filtera i ultracentrifugiranja. U novijim publikacijama se navodi da će kombinovanje mikroskopije i spektroskopije, uz podršku hemometrijskih tehnika, omogućiti bolje razumevanje ponašanja čestica nanoplastike u životnoj sredini i organizmima. Velike nade se polažu u mikroskopiju u kombinaciji sa neuronskim mrežama za kvantifikaciju i karakterizaciju nanoplastike u složenim sistemima. Ovaj rad opisuje puteve degradacije plastike i formiranje nanoplastike u vodenim sredinama, kao i moguće metode za odvajanje i karakterizaciju nanoplastike u odnosu na nedavne publikacije.
AB  - Scientists discovered plastic in the early 1900s, but didn't realize the detrimental effects its fragmentation could have on the environment 100 years later. In particular, nanoplastics (NPs) particles ranging in size from 1 to 100 nm can cause major problems in the living world due to their high specific surface area for the adsorption other polluting substances from water, and their further bioaccumulation through the food chain. There is no distinctive method to identify, characterize, and quantify nanoplastics in aquatic environments. Although many of the methods developed to study microplastics are not directly applicable to nanoplastics, conventional methods of characterizing nanoplastics are usually tedious because they study individual nanoparticles in isolation. Since nanoplastics resulting from the decomposition of microplastics have different properties than engineering plastic nanoparticles, new techniques need to be developed to help us better understand the seriousness of the nanoplastic problem. Nanoplastic can be isolated from the water environment by a combination of filters and ultracentrifugation. A recent publications states that combining microscopy and spectroscopy, supported by chemometric techniques, will alow a better understand he behavior of nanoplastic particles in the environment and organisms. High hopes are placed on microscopies combined with neural networks for the quantification and characterization of nanoplastics in complex systems. This article describes the degradation pathways of plastics and the formation of nanoplastics in aquatic environments, and possible methods for separation and characterization of nanoplastics in relation to recent publications.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Nanoplastika u vodenoj sredini - poreklo, separacija i karakterizacija - pregled
T1  - Nanoplastics in aquatic environments: Origin, separation and characterization: Review
EP  - 108
IS  - 1
SP  - 103
VL  - 78
DO  - 10.5937/tehnika2301103M
UR  - conv_39
ER  - 

@article{
author = "Milojkov, Dušan and Mitrović, Angelina and Smiljanić, Danijela and Jovanović, Gvozden and Sokić, Miroslav",
year = "2023",
abstract = "Naučnici su otkrili plastiku ranih 1900-ih, ali nisu shvatili kakve štetne efekte njena fragmentacija može imati na životnu sredinu 100 godina kasnije. Konkretno, čestice nanoplastike (NP) veličine od 1 do 100 nm mogu izazvati velike probleme u živom svetu zbog svoje velike specifične površine za adsorpciju drugih zagađujućih materija iz vode i njihove dalje bioakumulacije kroz lanac ishrane. Ne postoji poseban metod za identifikaciju, karakterizaciju i kvantifikaciju nanoplastike u vodenoj sredini. Iako mnoge metode razvijene za proučavanje mikroplastike nisu direktno primenljive na nanoplastiku, konvencionalne metode karakterizacije nanoplastike su obično zamorne jer proučavaju pojedinačne nanočestice u izolaciji. Pošto nanoplastika koja je rezultat razgradnje mikroplastike ima drugačija svojstva od sintetisanih plastičnih nanočestica, potrebno je razviti nove tehnike koje će nam pomoći da bolje razumemo ozbiljnost problema nanoplastike. Nanoplastika se može izolovati iz vodenog okruženja kombinacijom filtera i ultracentrifugiranja. U novijim publikacijama se navodi da će kombinovanje mikroskopije i spektroskopije, uz podršku hemometrijskih tehnika, omogućiti bolje razumevanje ponašanja čestica nanoplastike u životnoj sredini i organizmima. Velike nade se polažu u mikroskopiju u kombinaciji sa neuronskim mrežama za kvantifikaciju i karakterizaciju nanoplastike u složenim sistemima. Ovaj rad opisuje puteve degradacije plastike i formiranje nanoplastike u vodenim sredinama, kao i moguće metode za odvajanje i karakterizaciju nanoplastike u odnosu na nedavne publikacije., Scientists discovered plastic in the early 1900s, but didn't realize the detrimental effects its fragmentation could have on the environment 100 years later. In particular, nanoplastics (NPs) particles ranging in size from 1 to 100 nm can cause major problems in the living world due to their high specific surface area for the adsorption other polluting substances from water, and their further bioaccumulation through the food chain. There is no distinctive method to identify, characterize, and quantify nanoplastics in aquatic environments. Although many of the methods developed to study microplastics are not directly applicable to nanoplastics, conventional methods of characterizing nanoplastics are usually tedious because they study individual nanoparticles in isolation. Since nanoplastics resulting from the decomposition of microplastics have different properties than engineering plastic nanoparticles, new techniques need to be developed to help us better understand the seriousness of the nanoplastic problem. Nanoplastic can be isolated from the water environment by a combination of filters and ultracentrifugation. A recent publications states that combining microscopy and spectroscopy, supported by chemometric techniques, will alow a better understand he behavior of nanoplastic particles in the environment and organisms. High hopes are placed on microscopies combined with neural networks for the quantification and characterization of nanoplastics in complex systems. This article describes the degradation pathways of plastics and the formation of nanoplastics in aquatic environments, and possible methods for separation and characterization of nanoplastics in relation to recent publications.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Nanoplastika u vodenoj sredini - poreklo, separacija i karakterizacija - pregled, Nanoplastics in aquatic environments: Origin, separation and characterization: Review",
pages = "108-103",
number = "1",
volume = "78",
doi = "10.5937/tehnika2301103M",
url = "conv_39"
}

Milojkov, D., Mitrović, A., Smiljanić, D., Jovanović, G.,& Sokić, M.. (2023). Nanoplastika u vodenoj sredini - poreklo, separacija i karakterizacija - pregled. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 78(1), 103-108.
https://doi.org/10.5937/tehnika2301103M
conv_39

Milojkov D, Mitrović A, Smiljanić D, Jovanović G, Sokić M. Nanoplastika u vodenoj sredini - poreklo, separacija i karakterizacija - pregled. in Tehnika. 2023;78(1):103-108.
doi:10.5937/tehnika2301103M
conv_39 .

Milojkov, Dušan, Mitrović, Angelina, Smiljanić, Danijela, Jovanović, Gvozden, Sokić, Miroslav, "Nanoplastika u vodenoj sredini - poreklo, separacija i karakterizacija - pregled" in Tehnika, 78, no. 1 (2023):103-108,
https://doi.org/10.5937/tehnika2301103M .,
conv_39 .

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Sokić, Miroslav
AU  - Živković-Radovanović, Vukosava
AU  - Manojlović, Vaso
AU  - Mutavdzić, Dragosav R.
AU  - Janjić, Goran V.
AU  - Radotić, Ksenija
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/657
AB  - In this study, luminescence and antibacterial behavior of pure fluorapatite (FAp) and praseodymium-nitrate-carbonate co-doped fluorapatite (PrNCFAp) nanopowders were investigated. Uniform nanopowders were synthesized by precipitation reaction followed by centrifugation and systematically characterized by XRD, FTIR, SEM-EDS, TG and PL methods. XRD analysis revealed the formation of hexagonal FAp crystals, and FTIR spectra indicate the presence of nitrate (NO3-) and carbonate (CO32-) species. SEM analyzes confirm agglomerates composed of irregular nanometer-sized spheres. Emission of FAp nanopowder occurred in the violet-blue region of the visible part of the spectrum, with redshift to the blue-green color region when Pr3+, NO(3)(- )and CO32- co-doped in the lattice. Analysis of luminescence spectra by MCR-ALS method extract three fluorophores from the PrNCFAp sample and showed simultaneous existents of emission-reabsorption-emission between dopants in FAp lattice. Antibacterial activity against pathogen Staphylococcus aureus was investigated before and after treatment of nanopowders by UVA radiation of 365 nm. Nanopowders irradiated with UVA compared to non-irradiated reduced Staphylococcus aureus by 84.9% for PrNCFAp and 33.3% for FAp in the first 0.5 h of contact, and 76.1% and 42.9% after 24 h of contact. In addition, the obtained luminescent nanomaterials showed a low degree of hemolytic activity and could potentially be candidates for further research in dentistry.
PB  - Dordrecht : Springer
T2  - Optical and Quantum Electronics
T1  - Cascade luminescence and antibacterial behavior of fluorapatite nanopowder co-doped with Pr3+, NO3- and CO32- ions
IS  - 1
VL  - 55
DO  - 10.1007/s11082-022-04347-7
UR  - conv_959
ER  - 

@article{
author = "Milojkov, Dušan and Sokić, Miroslav and Živković-Radovanović, Vukosava and Manojlović, Vaso and Mutavdzić, Dragosav R. and Janjić, Goran V. and Radotić, Ksenija",
year = "2023",
abstract = "In this study, luminescence and antibacterial behavior of pure fluorapatite (FAp) and praseodymium-nitrate-carbonate co-doped fluorapatite (PrNCFAp) nanopowders were investigated. Uniform nanopowders were synthesized by precipitation reaction followed by centrifugation and systematically characterized by XRD, FTIR, SEM-EDS, TG and PL methods. XRD analysis revealed the formation of hexagonal FAp crystals, and FTIR spectra indicate the presence of nitrate (NO3-) and carbonate (CO32-) species. SEM analyzes confirm agglomerates composed of irregular nanometer-sized spheres. Emission of FAp nanopowder occurred in the violet-blue region of the visible part of the spectrum, with redshift to the blue-green color region when Pr3+, NO(3)(- )and CO32- co-doped in the lattice. Analysis of luminescence spectra by MCR-ALS method extract three fluorophores from the PrNCFAp sample and showed simultaneous existents of emission-reabsorption-emission between dopants in FAp lattice. Antibacterial activity against pathogen Staphylococcus aureus was investigated before and after treatment of nanopowders by UVA radiation of 365 nm. Nanopowders irradiated with UVA compared to non-irradiated reduced Staphylococcus aureus by 84.9% for PrNCFAp and 33.3% for FAp in the first 0.5 h of contact, and 76.1% and 42.9% after 24 h of contact. In addition, the obtained luminescent nanomaterials showed a low degree of hemolytic activity and could potentially be candidates for further research in dentistry.",
publisher = "Dordrecht : Springer",
journal = "Optical and Quantum Electronics",
title = "Cascade luminescence and antibacterial behavior of fluorapatite nanopowder co-doped with Pr3+, NO3- and CO32- ions",
number = "1",
volume = "55",
doi = "10.1007/s11082-022-04347-7",
url = "conv_959"
}

Milojkov, D., Sokić, M., Živković-Radovanović, V., Manojlović, V., Mutavdzić, D. R., Janjić, G. V.,& Radotić, K.. (2023). Cascade luminescence and antibacterial behavior of fluorapatite nanopowder co-doped with Pr3+, NO3- and CO32- ions. in Optical and Quantum Electronics
Dordrecht : Springer., 55(1).
https://doi.org/10.1007/s11082-022-04347-7
conv_959

Milojkov D, Sokić M, Živković-Radovanović V, Manojlović V, Mutavdzić DR, Janjić GV, Radotić K. Cascade luminescence and antibacterial behavior of fluorapatite nanopowder co-doped with Pr3+, NO3- and CO32- ions. in Optical and Quantum Electronics. 2023;55(1).
doi:10.1007/s11082-022-04347-7
conv_959 .

Milojkov, Dušan, Sokić, Miroslav, Živković-Radovanović, Vukosava, Manojlović, Vaso, Mutavdzić, Dragosav R., Janjić, Goran V., Radotić, Ksenija, "Cascade luminescence and antibacterial behavior of fluorapatite nanopowder co-doped with Pr3+, NO3- and CO32- ions" in Optical and Quantum Electronics, 55, no. 1 (2023),
https://doi.org/10.1007/s11082-022-04347-7 .,
conv_959 .

TY  - CONF
AU  - Milojkov, Dušan
AU  - Manojlović, Vaso
AU  - Nastasijević, Branislav
AU  - Sokić, Miroslav
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/934
AB  - Luminescent inorganic nanomaterials (nanophosphorus) based on fluorapatite (FAP) are attracting significant interest for biomedical, biotechnological and environmental applications. 
Luminescent nanopowders based on fluorapatite substituted with Pr3+ and CO32-ions (PrCFAP) were obtained by a simple precipitation method. Previously published results have shown that nanopowders are monophasic and composed of nanospheres, with luminescence in violet color. Also, 
nanopowders exhibit and antibacterial behavior against E. coli. In this study the results of chemocompatibility of antibacterial luminescent nanophospors obtained by precipitation for various biomedical and health applications are presented. Pure FAP showed a degree of hemolysis of 5% and can be considered chemcompatible. Doped nanopowders showed hemolysis up to about 10%. Slight hemolytic behavior of the tested PrCFAP nanopowders may be a consequence of mechanical stress of the cell in the interaction with nanoparticles, as well as the toxic effect of dissolved Pr3+ and 
F- ions from the FAP lattice. The above results indicate that the antibacterial PrCFAP nanophosphorus may be future evaluated for different biomedical applications, such as agents for cells labeling, therapy and drug delivery.
AB  - Luminescentni neorganski nanomaterijali (nanofosfor) na bazi fluorapatita (FAP) privlače značajno interesovanje za biomedicinske, biotehnološke i ekološke primene. Jednostavnom metodom 
precipitacije dobijeni su luminescentni nanomaterijali na bazi fluorapatita supstituisani Pr3+ i CO32- jonima (PrCFAP). Ranije objavljeni rezultati su pokazali da su nanoprahovi monofazni i sastavljeni od nanosfera, sa luminiscencijom u ljubičastoj boji. Pored toga, nanoprahovi su pokazali i antibakterijsko ponašanje protiv E. coli. U ovoj studiji prikazani su rezultati hemokompatibilnosti antibakterijskih luminiscentnih nanofospora dobijenih precipitacijom za različite biomedicinske i zdravstvene primene. Čisti FAP je pokazao stepen hemolize od 5% i može se smatrati hemokompatibilnim. Dopirani nanoprahovi su pokazali hemolizu do oko 10%. Blago hemolitičko ponašanje ispitivanih PrCFAP nanoprahova može biti posledica mehaničkog naprezanja ćelije u interakciji sa nanočesticama, kao i toksičnog dejstva rastvorenih Pr3+ i F jona iz FAP rešetke. Gore navedeni rezultati ukazuju da antibakterijski PrCFAP nanofosfori u budućnosti mogu biti procenjeni za različite biomedicinske primene, kao što su agenti za obeležavanje ćelija, terapije i isporuku lekova.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection
T1  - Chemocompatibility of fluorapatite-based antibacterial  nanophosphorus prepared by precipitation method for biomedical  applications
T1  - Hemokompatibilnost antibakterijskih nanofosfora na bazi fluorapatita  pripremljenog metodom precipitacije za biomedicinsku primenu
EP  - 42
SP  - 37
ER  - 

@conference{
author = "Milojkov, Dušan and Manojlović, Vaso and Nastasijević, Branislav and Sokić, Miroslav",
year = "2022",
abstract = "Luminescent inorganic nanomaterials (nanophosphorus) based on fluorapatite (FAP) are attracting significant interest for biomedical, biotechnological and environmental applications. 
Luminescent nanopowders based on fluorapatite substituted with Pr3+ and CO32-ions (PrCFAP) were obtained by a simple precipitation method. Previously published results have shown that nanopowders are monophasic and composed of nanospheres, with luminescence in violet color. Also, 
nanopowders exhibit and antibacterial behavior against E. coli. In this study the results of chemocompatibility of antibacterial luminescent nanophospors obtained by precipitation for various biomedical and health applications are presented. Pure FAP showed a degree of hemolysis of 5% and can be considered chemcompatible. Doped nanopowders showed hemolysis up to about 10%. Slight hemolytic behavior of the tested PrCFAP nanopowders may be a consequence of mechanical stress of the cell in the interaction with nanoparticles, as well as the toxic effect of dissolved Pr3+ and 
F- ions from the FAP lattice. The above results indicate that the antibacterial PrCFAP nanophosphorus may be future evaluated for different biomedical applications, such as agents for cells labeling, therapy and drug delivery., Luminescentni neorganski nanomaterijali (nanofosfor) na bazi fluorapatita (FAP) privlače značajno interesovanje za biomedicinske, biotehnološke i ekološke primene. Jednostavnom metodom 
precipitacije dobijeni su luminescentni nanomaterijali na bazi fluorapatita supstituisani Pr3+ i CO32- jonima (PrCFAP). Ranije objavljeni rezultati su pokazali da su nanoprahovi monofazni i sastavljeni od nanosfera, sa luminiscencijom u ljubičastoj boji. Pored toga, nanoprahovi su pokazali i antibakterijsko ponašanje protiv E. coli. U ovoj studiji prikazani su rezultati hemokompatibilnosti antibakterijskih luminiscentnih nanofospora dobijenih precipitacijom za različite biomedicinske i zdravstvene primene. Čisti FAP je pokazao stepen hemolize od 5% i može se smatrati hemokompatibilnim. Dopirani nanoprahovi su pokazali hemolizu do oko 10%. Blago hemolitičko ponašanje ispitivanih PrCFAP nanoprahova može biti posledica mehaničkog naprezanja ćelije u interakciji sa nanočesticama, kao i toksičnog dejstva rastvorenih Pr3+ i F jona iz FAP rešetke. Gore navedeni rezultati ukazuju da antibakterijski PrCFAP nanofosfori u budućnosti mogu biti procenjeni za različite biomedicinske primene, kao što su agenti za obeležavanje ćelija, terapije i isporuku lekova.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection",
title = "Chemocompatibility of fluorapatite-based antibacterial  nanophosphorus prepared by precipitation method for biomedical  applications, Hemokompatibilnost antibakterijskih nanofosfora na bazi fluorapatita  pripremljenog metodom precipitacije za biomedicinsku primenu",
pages = "42-37"
}

Milojkov, D., Manojlović, V., Nastasijević, B.,& Sokić, M.. (2022). Chemocompatibility of fluorapatite-based antibacterial  nanophosphorus prepared by precipitation method for biomedical  applications. in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM., 37-42.

Milojkov D, Manojlović V, Nastasijević B, Sokić M. Chemocompatibility of fluorapatite-based antibacterial  nanophosphorus prepared by precipitation method for biomedical  applications. in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection. 2022;:37-42..

Milojkov, Dušan, Manojlović, Vaso, Nastasijević, Branislav, Sokić, Miroslav, "Chemocompatibility of fluorapatite-based antibacterial  nanophosphorus prepared by precipitation method for biomedical  applications" in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection (2022):37-42.

TY  - CONF
AU  - Mitrović, Angelina
AU  - Prokić, Danijela
AU  - Lukić, Jelena
AU  - Milojkov, Dušan
AU  - Smiljanić, Danijela
AU  - Đurkić, Tatjana
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/725
AB  - Unappropriated disposing of unused drugs leads to an increase in their concentration in the
environment. Furthermore, wastewater treatment plants are not sufficient to prevent the
transport of drugs. Microplastics (MPs), which are also recognized as important pollutants,
can be divided into primary and secondary. The primary MPs are produced for commercial
purposes, while the secondary MPs are formed by the decomposition of plastic residues.
The hydrophobic nature and large specific surface area of MPs facilitate pollutants
binding. Animals misunderstand MPs for food and consume it, which could have harmful
health impacts because both MPs and adsorbed pollutants are ingested. In this paper, the
adsorption of the selected drugs - azithromycin, carbamazepine, sulfamethoxazole, and
diclofenac on low-density polyethylene (LDPE), polyamide (PA), and poly(ethylene
terephthalate) (PET) microplastics are presented. The experiment showed that drugs bind
best to PA and that azithromycin has the highest binding affinity.
AB  - Neadekvatno odlaganje neiskorišćenih lekova dovodi do povećanja njihove koncentracije u životnoj sredini. Pored toga, postrojenja za prečišćavanje otpadnih voda nisu dovoljna barijera za sprečavanje transporta lekova. Mikroplastika (MP), koja je takođe detektovana kao bitan polutant, može se podeliti na primarnu i sekundarnu. Primarna se proizvodi za komercijalne svrhe, a sekundarna nastaje razgradnjom plastičnih ostataka. Hidrofobna priroda i velika specifična površina MP olakšava adsorpciju polutanata na ove materijale.
Životinje mešaju MP sa hranom i unose je u svoj organizam, što može imati negativni uticaj na njihovo zdravlje, jer se tako unose i MP i adsorbovani polutanti. U ovom radu je prikazana adsorpcija odabranih lekova - azitromicina, karbamazepina, sulfametoksazola i diklofenaka na sledećim vrstama mikroplastike - polietilenu niske gustine (LDPE), poliamidu (PA) i poli(etilen tereftalatu) (PET). Eksperiment je pokazao da se lekovi najbolje vezuju za PA, kao i da azitromicin ima najveći afinitet vezivanja.
PB  - Belgrade : Serbian Chemical Society
C3  - 58. SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRATKI IZVODI RADOVA/KNJIGA RADOVA
T1  - Adsorption of selected pharmaceuticals on LDPE, PA, and PET microplastics
T1  - Adsorpcija odabranih lekova na LDPE, PA i PET mikroplastici
EP  - 225
SP  - 222
ER  - 

@conference{
author = "Mitrović, Angelina and Prokić, Danijela and Lukić, Jelena and Milojkov, Dušan and Smiljanić, Danijela and Đurkić, Tatjana",
year = "2022",
abstract = "Unappropriated disposing of unused drugs leads to an increase in their concentration in the
environment. Furthermore, wastewater treatment plants are not sufficient to prevent the
transport of drugs. Microplastics (MPs), which are also recognized as important pollutants,
can be divided into primary and secondary. The primary MPs are produced for commercial
purposes, while the secondary MPs are formed by the decomposition of plastic residues.
The hydrophobic nature and large specific surface area of MPs facilitate pollutants
binding. Animals misunderstand MPs for food and consume it, which could have harmful
health impacts because both MPs and adsorbed pollutants are ingested. In this paper, the
adsorption of the selected drugs - azithromycin, carbamazepine, sulfamethoxazole, and
diclofenac on low-density polyethylene (LDPE), polyamide (PA), and poly(ethylene
terephthalate) (PET) microplastics are presented. The experiment showed that drugs bind
best to PA and that azithromycin has the highest binding affinity., Neadekvatno odlaganje neiskorišćenih lekova dovodi do povećanja njihove koncentracije u životnoj sredini. Pored toga, postrojenja za prečišćavanje otpadnih voda nisu dovoljna barijera za sprečavanje transporta lekova. Mikroplastika (MP), koja je takođe detektovana kao bitan polutant, može se podeliti na primarnu i sekundarnu. Primarna se proizvodi za komercijalne svrhe, a sekundarna nastaje razgradnjom plastičnih ostataka. Hidrofobna priroda i velika specifična površina MP olakšava adsorpciju polutanata na ove materijale.
Životinje mešaju MP sa hranom i unose je u svoj organizam, što može imati negativni uticaj na njihovo zdravlje, jer se tako unose i MP i adsorbovani polutanti. U ovom radu je prikazana adsorpcija odabranih lekova - azitromicina, karbamazepina, sulfametoksazola i diklofenaka na sledećim vrstama mikroplastike - polietilenu niske gustine (LDPE), poliamidu (PA) i poli(etilen tereftalatu) (PET). Eksperiment je pokazao da se lekovi najbolje vezuju za PA, kao i da azitromicin ima najveći afinitet vezivanja.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "58. SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRATKI IZVODI RADOVA/KNJIGA RADOVA",
title = "Adsorption of selected pharmaceuticals on LDPE, PA, and PET microplastics, Adsorpcija odabranih lekova na LDPE, PA i PET mikroplastici",
pages = "225-222"
}

Mitrović, A., Prokić, D., Lukić, J., Milojkov, D., Smiljanić, D.,& Đurkić, T.. (2022). Adsorption of selected pharmaceuticals on LDPE, PA, and PET microplastics. in 58. SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRATKI IZVODI RADOVA/KNJIGA RADOVA
Belgrade : Serbian Chemical Society., 222-225.

Mitrović A, Prokić D, Lukić J, Milojkov D, Smiljanić D, Đurkić T. Adsorption of selected pharmaceuticals on LDPE, PA, and PET microplastics. in 58. SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRATKI IZVODI RADOVA/KNJIGA RADOVA. 2022;:222-225..

Mitrović, Angelina, Prokić, Danijela, Lukić, Jelena, Milojkov, Dušan, Smiljanić, Danijela, Đurkić, Tatjana, "Adsorption of selected pharmaceuticals on LDPE, PA, and PET microplastics" in 58. SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRATKI IZVODI RADOVA/KNJIGA RADOVA (2022):222-225.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Mitrović, Angelina
AU  - Smiljanić, Danijela
AU  - Jovanović, Gvozden
AU  - Sokić, Miroslav
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/989
AB  - Zagađenje vodenih resursa mikro- i nano-plastikom je prepoznato kao globalni problem. Trenutno ne postoje dostupne specifične metode za identifikaciju, karakterizaciju i kvantifikaciju nanoplastike u vodenim sredinama. Mnoge od metodologija razvijenih za analizu mikroplastike ne mogu se direktno primeniti na nanoplastiku, dok konvencionalne
metode karakterizacije nanoplastike obično izoluju i proučavaju pojedinačne nanočestice, što može biti naporan i dugotrajan proces. Korišćenjem mikroskopskih tehnika u kombinaciji sa spektroskopijom, moguće je ubrzati proces analize, ispitati morfologiju i veličinu čestica i istovremeno identifikovati hemiju. Pošto nanoplastika nastala degradacijom mikroplastike
ima drugačija svojstva od sintetisanih nanočestica plastike, neophodno je kreirati nove analitičke i mikroskopske tehnike koje će pomoći da se bolje razume ozbiljnost problema nanoplastike. Ovaj rad ima za cilj da identifikuje metode koje bi mogle da se primene za odvajanje i karakterizaciju nanoplastike iz vodenih sredina.
AB  - Pollution of water resources with micro- and nanoplastics is recognized as a global problem. Currently, there are no specific methods available for the identification, characterization and quantification of nanoplastics in aquatic environments. Many of the methodologies developed for the analysis of microplastics cannot be directly applied to nanoplastics, while conventional nanoplastic characterization methods usually isolate and study individual nanoparticles, which can be a laborious and time-consuming process. By using microscopic techniques combined with spectroscopy, it is possible to speed up the analysis process, examine the morphology and size of the particle and identify the chemistry at the same time. Since nanoplastics created by the degradation of microplastics have
different properties than synthesized plastic nanoparticles, it is necessary to create new analytical and microscopic techniques that will help to better understand the seriousness of the nanoplastics problem. This work aims to identify methods that could be applied for the separation and characterization of nanoplastics from aquatic environments.
PB  - Beograd : Savez inženjera i tehničara Srbije
C3  - 43. Međunarodna konferencija Vodovod i kanalizacija '22, Zrenjanin
T1  - Identifikacija metoda za separaciju i karakterizaciju nanoplastike iz vodenih sredina / Identification of methods for separation and characterisation of nanoplastic from aquatic environments
EP  - 115
SP  - 110
ER  - 

@conference{
author = "Milojkov, Dušan and Mitrović, Angelina and Smiljanić, Danijela and Jovanović, Gvozden and Sokić, Miroslav",
year = "2022",
abstract = "Zagađenje vodenih resursa mikro- i nano-plastikom je prepoznato kao globalni problem. Trenutno ne postoje dostupne specifične metode za identifikaciju, karakterizaciju i kvantifikaciju nanoplastike u vodenim sredinama. Mnoge od metodologija razvijenih za analizu mikroplastike ne mogu se direktno primeniti na nanoplastiku, dok konvencionalne
metode karakterizacije nanoplastike obično izoluju i proučavaju pojedinačne nanočestice, što može biti naporan i dugotrajan proces. Korišćenjem mikroskopskih tehnika u kombinaciji sa spektroskopijom, moguće je ubrzati proces analize, ispitati morfologiju i veličinu čestica i istovremeno identifikovati hemiju. Pošto nanoplastika nastala degradacijom mikroplastike
ima drugačija svojstva od sintetisanih nanočestica plastike, neophodno je kreirati nove analitičke i mikroskopske tehnike koje će pomoći da se bolje razume ozbiljnost problema nanoplastike. Ovaj rad ima za cilj da identifikuje metode koje bi mogle da se primene za odvajanje i karakterizaciju nanoplastike iz vodenih sredina., Pollution of water resources with micro- and nanoplastics is recognized as a global problem. Currently, there are no specific methods available for the identification, characterization and quantification of nanoplastics in aquatic environments. Many of the methodologies developed for the analysis of microplastics cannot be directly applied to nanoplastics, while conventional nanoplastic characterization methods usually isolate and study individual nanoparticles, which can be a laborious and time-consuming process. By using microscopic techniques combined with spectroscopy, it is possible to speed up the analysis process, examine the morphology and size of the particle and identify the chemistry at the same time. Since nanoplastics created by the degradation of microplastics have
different properties than synthesized plastic nanoparticles, it is necessary to create new analytical and microscopic techniques that will help to better understand the seriousness of the nanoplastics problem. This work aims to identify methods that could be applied for the separation and characterization of nanoplastics from aquatic environments.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "43. Međunarodna konferencija Vodovod i kanalizacija '22, Zrenjanin",
title = "Identifikacija metoda za separaciju i karakterizaciju nanoplastike iz vodenih sredina / Identification of methods for separation and characterisation of nanoplastic from aquatic environments",
pages = "115-110"
}

Milojkov, D., Mitrović, A., Smiljanić, D., Jovanović, G.,& Sokić, M.. (2022). Identifikacija metoda za separaciju i karakterizaciju nanoplastike iz vodenih sredina / Identification of methods for separation and characterisation of nanoplastic from aquatic environments. in 43. Međunarodna konferencija Vodovod i kanalizacija '22, Zrenjanin
Beograd : Savez inženjera i tehničara Srbije., 110-115.

Milojkov D, Mitrović A, Smiljanić D, Jovanović G, Sokić M. Identifikacija metoda za separaciju i karakterizaciju nanoplastike iz vodenih sredina / Identification of methods for separation and characterisation of nanoplastic from aquatic environments. in 43. Međunarodna konferencija Vodovod i kanalizacija '22, Zrenjanin. 2022;:110-115..

Milojkov, Dušan, Mitrović, Angelina, Smiljanić, Danijela, Jovanović, Gvozden, Sokić, Miroslav, "Identifikacija metoda za separaciju i karakterizaciju nanoplastike iz vodenih sredina / Identification of methods for separation and characterisation of nanoplastic from aquatic environments" in 43. Međunarodna konferencija Vodovod i kanalizacija '22, Zrenjanin (2022):110-115.

TY  - JOUR
AU  - Sokić, Miroslav
AU  - Stojanović, Jovica
AU  - Marković, Branislav
AU  - Kamberović, Željko
AU  - Gajić, Nataša
AU  - Radosavljević-Mihajlović, Ana
AU  - Milojkov, Dušan
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/607
AB  - This paper examines the effects of structural-textural characteristics of sulfide minerals on their leaching from polymetallic concentrates with sulfuric acid and hydrogen peroxide solutions. The polymetallic concentrate was obtained by flotation of polymetallic ore from the Rudnik deposit in Serbia. X-ray diffraction (XRD), qualitative and quantitative mineralogical, scanning electron microscopy (SEM/EDX), and chemical analyses were used to characterize the polymetallic concentrate and leach residue. The polymetallic concentrate contained chalcopyrite, galena, sphalerite, pyrrhotite, and quartz. The total content of sulfide minerals was 69.5%, and the occurrence of free sulfide mineral grains was about 60.9%. The comprehensive thermodynamic analysis was done by HSC Chemistry (R) package 9.9.2.3 to determine optimal experimental leaching conditions. Chalcopyrite, sphalerite, and pyrrhotite oxidized during leaching, and dissolution occurred. The oxidized galena remains in the solid residual as insoluble anglesite. Also, elemental sulfur and unleached minerals of copper, zinc, and iron were found in the leach residues. It was found that the structural assembly of sulfide minerals in the leach residue is very favorable and that undissolved sulfide grains are primarily present in free form. Accordingly, there was no reason to reduce the leaching rate with time. The presence of elemental sulfur and anglesite formed in the leaching process and precipitated on the surface of mineral grains was confirmed by XRD, quantitative and qualitative mineralogical analysis, and SEM/EDX.
PB  - Pleiades Publishing Inc, New York
T2  - Russian Journal of Non-Ferrous Metals
T1  - Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions
EP  - 472
IS  - 5
SP  - 457
VL  - 63
DO  - 10.3103/S1067821222050091
UR  - conv_954
ER  - 

@article{
author = "Sokić, Miroslav and Stojanović, Jovica and Marković, Branislav and Kamberović, Željko and Gajić, Nataša and Radosavljević-Mihajlović, Ana and Milojkov, Dušan",
year = "2022",
abstract = "This paper examines the effects of structural-textural characteristics of sulfide minerals on their leaching from polymetallic concentrates with sulfuric acid and hydrogen peroxide solutions. The polymetallic concentrate was obtained by flotation of polymetallic ore from the Rudnik deposit in Serbia. X-ray diffraction (XRD), qualitative and quantitative mineralogical, scanning electron microscopy (SEM/EDX), and chemical analyses were used to characterize the polymetallic concentrate and leach residue. The polymetallic concentrate contained chalcopyrite, galena, sphalerite, pyrrhotite, and quartz. The total content of sulfide minerals was 69.5%, and the occurrence of free sulfide mineral grains was about 60.9%. The comprehensive thermodynamic analysis was done by HSC Chemistry (R) package 9.9.2.3 to determine optimal experimental leaching conditions. Chalcopyrite, sphalerite, and pyrrhotite oxidized during leaching, and dissolution occurred. The oxidized galena remains in the solid residual as insoluble anglesite. Also, elemental sulfur and unleached minerals of copper, zinc, and iron were found in the leach residues. It was found that the structural assembly of sulfide minerals in the leach residue is very favorable and that undissolved sulfide grains are primarily present in free form. Accordingly, there was no reason to reduce the leaching rate with time. The presence of elemental sulfur and anglesite formed in the leaching process and precipitated on the surface of mineral grains was confirmed by XRD, quantitative and qualitative mineralogical analysis, and SEM/EDX.",
publisher = "Pleiades Publishing Inc, New York",
journal = "Russian Journal of Non-Ferrous Metals",
title = "Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions",
pages = "472-457",
number = "5",
volume = "63",
doi = "10.3103/S1067821222050091",
url = "conv_954"
}

Sokić, M., Stojanović, J., Marković, B., Kamberović, Ž., Gajić, N., Radosavljević-Mihajlović, A.,& Milojkov, D.. (2022). Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions. in Russian Journal of Non-Ferrous Metals
Pleiades Publishing Inc, New York., 63(5), 457-472.
https://doi.org/10.3103/S1067821222050091
conv_954

Sokić M, Stojanović J, Marković B, Kamberović Ž, Gajić N, Radosavljević-Mihajlović A, Milojkov D. Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions. in Russian Journal of Non-Ferrous Metals. 2022;63(5):457-472.
doi:10.3103/S1067821222050091
conv_954 .

Sokić, Miroslav, Stojanović, Jovica, Marković, Branislav, Kamberović, Željko, Gajić, Nataša, Radosavljević-Mihajlović, Ana, Milojkov, Dušan, "Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions" in Russian Journal of Non-Ferrous Metals, 63, no. 5 (2022):457-472,
https://doi.org/10.3103/S1067821222050091 .,
conv_954 .

TY  - CONF
AU  - Milojkov, Dušan
AU  - Mitrović, Angelina
AU  - Manojlović, Vaso
AU  - Sokić, Miroslav
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/990
AB  - U ovom radu biće prikazano dobijanje različitih adsorbenata na bazi polimernih mreža i gelova sa dodatkom nanočestica i njihova primena za prečišćavanje otpadnih voda od metala. Polimerne mreže i hidrogelovi kao adsorbenti predstavljaju novu alternativu za sistem tretmana otpadnih voda, ako se uzme u obzir da se mogu lako sintetisati sa željenim osobinama, i to od dostupnih i jeftinih sirovina. Dodatkom nanočestica u takvu polimernu
matricu nastaju nove klase multifunkcionalnih nanokompozitnih materijala, koji vrlo efikasno uklanjaju teške metale, radioaktivne elemente, boje, fenole i pesticide. U poređenju sa konvencionalnim adsorbentima, ovakvi superabsorbenti imaju niz prednosti kao što su visoki adsorpcioni kapacitet, velika brzina adsorpcije, mogućnost primene u širokom opsegu pH vrednosti, a potom i mogućnost desorpcije i ponovne upotrebe.
AB  - In this paper, the preparation of various adsorbents based on polymer networks
and gels with the addition of nanoparticles and their application for metal wastewater tre atment will be shown. Polymer networks and hydrogels as adsorbents represent a new alte rnative to the wastewater treatment system, given that they can be easily synthesized with thedesired properties, from available and inexpensive raw materials. The addition of nano particles to such a polymer matrix creates new classes of multifunctional nanocomposite
materials, which very efficiently remove heavy metals, radioactive elements, dyes, phenols and pesticides. Compared to conventional adsorbents, such superabsorbents have a number of advantages such as high adsorption capacity, high adsorption rate, the possibility of application in a wide range of pH values, and then the possibility of desorption and reuse.
PB  - Beograd : Savez inženjera i tehničara Srbije
C3  - 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja
T1  - Superabsorbenti na bazi polimernih mreža i gelova sa dodatkom nanočestica za prečišćavanje otpadnih voda od metala
T1  - Superabsorbents based on polymer networks and gels with the addition of nanoparticles for metal wastewater treatment
EP  - 19
SP  - 13
ER  - 

@conference{
author = "Milojkov, Dušan and Mitrović, Angelina and Manojlović, Vaso and Sokić, Miroslav",
year = "2021",
abstract = "U ovom radu biće prikazano dobijanje različitih adsorbenata na bazi polimernih mreža i gelova sa dodatkom nanočestica i njihova primena za prečišćavanje otpadnih voda od metala. Polimerne mreže i hidrogelovi kao adsorbenti predstavljaju novu alternativu za sistem tretmana otpadnih voda, ako se uzme u obzir da se mogu lako sintetisati sa željenim osobinama, i to od dostupnih i jeftinih sirovina. Dodatkom nanočestica u takvu polimernu
matricu nastaju nove klase multifunkcionalnih nanokompozitnih materijala, koji vrlo efikasno uklanjaju teške metale, radioaktivne elemente, boje, fenole i pesticide. U poređenju sa konvencionalnim adsorbentima, ovakvi superabsorbenti imaju niz prednosti kao što su visoki adsorpcioni kapacitet, velika brzina adsorpcije, mogućnost primene u širokom opsegu pH vrednosti, a potom i mogućnost desorpcije i ponovne upotrebe., In this paper, the preparation of various adsorbents based on polymer networks
and gels with the addition of nanoparticles and their application for metal wastewater tre atment will be shown. Polymer networks and hydrogels as adsorbents represent a new alte rnative to the wastewater treatment system, given that they can be easily synthesized with thedesired properties, from available and inexpensive raw materials. The addition of nano particles to such a polymer matrix creates new classes of multifunctional nanocomposite
materials, which very efficiently remove heavy metals, radioactive elements, dyes, phenols and pesticides. Compared to conventional adsorbents, such superabsorbents have a number of advantages such as high adsorption capacity, high adsorption rate, the possibility of application in a wide range of pH values, and then the possibility of desorption and reuse.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja",
title = "Superabsorbenti na bazi polimernih mreža i gelova sa dodatkom nanočestica za prečišćavanje otpadnih voda od metala, Superabsorbents based on polymer networks and gels with the addition of nanoparticles for metal wastewater treatment",
pages = "19-13"
}

Milojkov, D., Mitrović, A., Manojlović, V.,& Sokić, M.. (2021). Superabsorbenti na bazi polimernih mreža i gelova sa dodatkom nanočestica za prečišćavanje otpadnih voda od metala. in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja
Beograd : Savez inženjera i tehničara Srbije., 13-19.

Milojkov D, Mitrović A, Manojlović V, Sokić M. Superabsorbenti na bazi polimernih mreža i gelova sa dodatkom nanočestica za prečišćavanje otpadnih voda od metala. in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja. 2021;:13-19..

Milojkov, Dušan, Mitrović, Angelina, Manojlović, Vaso, Sokić, Miroslav, "Superabsorbenti na bazi polimernih mreža i gelova sa dodatkom nanočestica za prečišćavanje otpadnih voda od metala" in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja (2021):13-19.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Manojlović, Vaso
AU  - Mutavdžić, Dragosav
AU  - Sokić, Miroslav
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/936
AB  - A wide range of new biomaterials for medical use has been prepared using various coupled ionic substitutions in a fluorapatite (FAp) crystal matrix [1-4]. FAp is present in human enamel, so its synthetic form is often used in the treatment of dental caries or osteoporosis [5]. In recent years, FAP nano-sized particles doped with rare-earth ions have been extensively studied as potential luminescent material for cell labeling, bone imaging in bone tissue engineering, and for cancer therapies [1-4]. Moreover, FAp is a suitable crystal matrix for various substituents that can alter its physicochemical, luminescent, and biological properties [5].
Uniform nanopowders of pure fluorapatite (FAp) and praseodymium-nitrate-carbonate substituted fluorapatite (PrNCFAp) have been successfully synthesized by precipitation reaction, and systematically characterized by XRD, FTIR, SEM, TG and PL methods. Coupled substitution of FAp reduces the crystallite size, and FTIR spectra indicate the presence of nitrate (NO3-) and carbonat (CO32-) species. Structure thermally analysis confirm decomposition of water, NO3- and CO32- species in the range of 100-750 oC. Emission of FAp nanopowder occurred in the violet-blue region of visible part of the spectrum, with redshift to the green color region when Pr3+, NO3- and CO32- substituted in the lattice. Analysis of luminescence spectra by MCR-ALS method extract three fluorophores from the samples and showed simultaneous existents of emission-reabsorption between dopants in FAp lattice. 
The obtained samples showed a small degree of hemolysis and antibacterial activity and could potentially be candidates for further research in dentistry
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2021 VIII International School and Conference on Photonics & HEMMAGINERO workshop
T1  - Coupled substitutions of fluorapatite crystals in the engineering of optically-active bionanomaterials
EP  - 101
SP  - 101
ER  - 

@conference{
author = "Milojkov, Dušan and Manojlović, Vaso and Mutavdžić, Dragosav and Sokić, Miroslav",
year = "2021",
abstract = "A wide range of new biomaterials for medical use has been prepared using various coupled ionic substitutions in a fluorapatite (FAp) crystal matrix [1-4]. FAp is present in human enamel, so its synthetic form is often used in the treatment of dental caries or osteoporosis [5]. In recent years, FAP nano-sized particles doped with rare-earth ions have been extensively studied as potential luminescent material for cell labeling, bone imaging in bone tissue engineering, and for cancer therapies [1-4]. Moreover, FAp is a suitable crystal matrix for various substituents that can alter its physicochemical, luminescent, and biological properties [5].
Uniform nanopowders of pure fluorapatite (FAp) and praseodymium-nitrate-carbonate substituted fluorapatite (PrNCFAp) have been successfully synthesized by precipitation reaction, and systematically characterized by XRD, FTIR, SEM, TG and PL methods. Coupled substitution of FAp reduces the crystallite size, and FTIR spectra indicate the presence of nitrate (NO3-) and carbonat (CO32-) species. Structure thermally analysis confirm decomposition of water, NO3- and CO32- species in the range of 100-750 oC. Emission of FAp nanopowder occurred in the violet-blue region of visible part of the spectrum, with redshift to the green color region when Pr3+, NO3- and CO32- substituted in the lattice. Analysis of luminescence spectra by MCR-ALS method extract three fluorophores from the samples and showed simultaneous existents of emission-reabsorption between dopants in FAp lattice. 
The obtained samples showed a small degree of hemolysis and antibacterial activity and could potentially be candidates for further research in dentistry",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2021 VIII International School and Conference on Photonics & HEMMAGINERO workshop",
title = "Coupled substitutions of fluorapatite crystals in the engineering of optically-active bionanomaterials",
pages = "101-101"
}

Milojkov, D., Manojlović, V., Mutavdžić, D.,& Sokić, M.. (2021). Coupled substitutions of fluorapatite crystals in the engineering of optically-active bionanomaterials. in PHOTONICA2021 VIII International School and Conference on Photonics & HEMMAGINERO workshop
Belgrade : Institute of Physics Belgrade., 101-101.

Milojkov D, Manojlović V, Mutavdžić D, Sokić M. Coupled substitutions of fluorapatite crystals in the engineering of optically-active bionanomaterials. in PHOTONICA2021 VIII International School and Conference on Photonics & HEMMAGINERO workshop. 2021;:101-101..

Milojkov, Dušan, Manojlović, Vaso, Mutavdžić, Dragosav, Sokić, Miroslav, "Coupled substitutions of fluorapatite crystals in the engineering of optically-active bionanomaterials" in PHOTONICA2021 VIII International School and Conference on Photonics & HEMMAGINERO workshop (2021):101-101.

TY  - CONF
AU  - Mitrović, Angelina
AU  - Đurkić, Tatjana
AU  - Prokić, Danijela
AU  - Lukić, Jelena
AU  - Milojkov, Dušan
AU  - Smiljanić, Danijela
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/976
AB  - Masovna upotreba plastike u konzumerističkom životnom stilu prouzrokovala je problem koji izumitelji ovih polimera nisu mogli predvideti. Otkriće mikroplastike kao polutanta prisutnog u životnoj sredini postalo je globalna briga i rezultiralo intenzivnom istraživanju u ovoj oblasti. Mikroplastika je definisana kao bilo koji deo plastike sa pre čnikom od 100 nm do 5 mm. Mikroplastika je svuda oko nas, ima je u kozmetičkim proiz vodima, vlaknima odeće, vodi i hrani, a pronađena je čak i u artičkom ledu. U ovom pre glednom radu biće opisano zašto se sumnja da su postrojenja za prečišćavanje otpadnih voda (PPOV) značajni tačkasti izvori ispuštanja mikroplastike u vodenu sredinu.
AB  - The frequent usage of plastics in the consumer lifestyle has caused a problem that 
inventors of these polymers could not have foreseen. The discovery of microplastics as a pollutant present in the environment has become a global concern and has resulted in intensive research in this area. Microplastic is defined as any part of plastic with a diameter of 100 nm to 5 mm. Microplastics are all around us, in cosmetics, fibers of our clothes, water, and food, and it is even found in arctic ice. This review will describe why wastewater treatment plants (WWTPs) are suspected to be significant point sources of microplastic discharges into the aquatic environment.
PB  - Beograd : Savez inženjera i tehničara Srbije
C3  - 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja
T1  - Mikroplastika u otpadnim vodama
T1  - Microplastics in wastewater
EP  - 201
SP  - 197
ER  - 

@conference{
author = "Mitrović, Angelina and Đurkić, Tatjana and Prokić, Danijela and Lukić, Jelena and Milojkov, Dušan and Smiljanić, Danijela",
year = "2021",
abstract = "Masovna upotreba plastike u konzumerističkom životnom stilu prouzrokovala je problem koji izumitelji ovih polimera nisu mogli predvideti. Otkriće mikroplastike kao polutanta prisutnog u životnoj sredini postalo je globalna briga i rezultiralo intenzivnom istraživanju u ovoj oblasti. Mikroplastika je definisana kao bilo koji deo plastike sa pre čnikom od 100 nm do 5 mm. Mikroplastika je svuda oko nas, ima je u kozmetičkim proiz vodima, vlaknima odeće, vodi i hrani, a pronađena je čak i u artičkom ledu. U ovom pre glednom radu biće opisano zašto se sumnja da su postrojenja za prečišćavanje otpadnih voda (PPOV) značajni tačkasti izvori ispuštanja mikroplastike u vodenu sredinu., The frequent usage of plastics in the consumer lifestyle has caused a problem that 
inventors of these polymers could not have foreseen. The discovery of microplastics as a pollutant present in the environment has become a global concern and has resulted in intensive research in this area. Microplastic is defined as any part of plastic with a diameter of 100 nm to 5 mm. Microplastics are all around us, in cosmetics, fibers of our clothes, water, and food, and it is even found in arctic ice. This review will describe why wastewater treatment plants (WWTPs) are suspected to be significant point sources of microplastic discharges into the aquatic environment.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja",
title = "Mikroplastika u otpadnim vodama, Microplastics in wastewater",
pages = "201-197"
}

Mitrović, A., Đurkić, T., Prokić, D., Lukić, J., Milojkov, D.,& Smiljanić, D.. (2021). Mikroplastika u otpadnim vodama. in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja
Beograd : Savez inženjera i tehničara Srbije., 197-201.

Mitrović A, Đurkić T, Prokić D, Lukić J, Milojkov D, Smiljanić D. Mikroplastika u otpadnim vodama. in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja. 2021;:197-201..

Mitrović, Angelina, Đurkić, Tatjana, Prokić, Danijela, Lukić, Jelena, Milojkov, Dušan, Smiljanić, Danijela, "Mikroplastika u otpadnim vodama" in 42. Međunarodna konferencija Vodovod i kanalizacija '21, Vrnjačka Banja (2021):197-201.

TY  - CONF
AU  - Milojkov, Dušan
AU  - Sokić, Miroslav
AU  - Manojlović, Vaso
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/935
AB  - In this paper, metal substitutions in the fluorapatite crystal matrix will be presented in order to obtain a new type of biomedical material. Fluorapatite has been intensively tested in recent decades as a building material for luminescent materials for many applications, from fluorescent lamps, through LEDs, to nanomaterials for high-tech biomedical applications. Fluorapatite has been shown to be non-toxic, extremely chemically stable and corrosion-resistant, as well as biocompatible, bioactive and osteoconductive. Also, fluorapatite proved to be a great host material for doping luminescent centers in the form of trivalent ions of rare earth and transition metals. Thanks to the position of the fluorine atom in the structure of the crystal lattice of fluorapatite, in the center of the Ca2 triangle (6h position) in the mirror planes at z = 1/4 and z = 3/4, this structure is extremely stable and stable. Also, the fluorine atom is responsible for the fact that fluorapatite, unlike hydroxyapatite, shows antibacterial properties. By touching different metals 
into this low phonon energy matrix, luminescent materials can be constructed that will emit light in the ultraviolet, visible or infrared region of the electromagnetic spectrum. If all these properties of fluorapatite are taken into account, their combination can lead to new materials for a wide range of 
biomedical applications.
AB  - U ovom radu biće prikazane supstitucije metala u kristalnom matriksu fluorapatita s ciljem dobijanja nove vrste biomedicinskih materijala. Fluorapatit se poslednjih decenija intenzivno ispituje kao materijal za izgradnju luminiscentnih materijala za široki spektar primena, od fluorescentnih lampi, preko LED dioda, do nanomaterijala za biomedicinske aplikacije visoke tehnologije. Fluorapatit se pokazao kao netoksičan, izuzetno hemijski stabilan i otporan na koroziju, a uz to i biokompatibilan, bioaktivan i osteokonduktivan. Takođe, fluorapatit se pokazao i kao sjajan materijal domaćin za dopiranje luminiscentnih centara u vidu trovalentnih jona retkih zemalja i prelaznih metala. Zahvaljujući položaju atoma fluora u strukturi kristalne rešetke fluprapatita, u centru Ca2 trougla (6h položaj) u ogledalskim ravnima na z = 1/4 i z = 3/4, ovakva struktura je izuzetno stabilna i postojana. Takođe, atom fluora je odgovoran što fluorapatit, za razliku od hidroksiapatita, pokazuje i antibakterijska svojstva. Dopiranjem različitih metala u ovu matricu niske fononske energije, mogu se konstruisati luminiscentni materijali koji će emitovati svetlost u ultravioletnoj, vidljivoj ili infracrvenoj oblasti elektromagnetnog spektra. Ako se uzmu u obzir sve ove osobine fluorapatita, njihovom kombinacijom mogu se dobiti novi materijali za široki 
spektar biomedicinskih primena.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection
T1  - New biomedical materials based on metal-doped fluorapatite
T1  - Novi biomedicinski materijali na bazi metal dopiranih fluorapatita
EP  - 165
SP  - 159
ER  - 

@conference{
author = "Milojkov, Dušan and Sokić, Miroslav and Manojlović, Vaso",
year = "2021",
abstract = "In this paper, metal substitutions in the fluorapatite crystal matrix will be presented in order to obtain a new type of biomedical material. Fluorapatite has been intensively tested in recent decades as a building material for luminescent materials for many applications, from fluorescent lamps, through LEDs, to nanomaterials for high-tech biomedical applications. Fluorapatite has been shown to be non-toxic, extremely chemically stable and corrosion-resistant, as well as biocompatible, bioactive and osteoconductive. Also, fluorapatite proved to be a great host material for doping luminescent centers in the form of trivalent ions of rare earth and transition metals. Thanks to the position of the fluorine atom in the structure of the crystal lattice of fluorapatite, in the center of the Ca2 triangle (6h position) in the mirror planes at z = 1/4 and z = 3/4, this structure is extremely stable and stable. Also, the fluorine atom is responsible for the fact that fluorapatite, unlike hydroxyapatite, shows antibacterial properties. By touching different metals 
into this low phonon energy matrix, luminescent materials can be constructed that will emit light in the ultraviolet, visible or infrared region of the electromagnetic spectrum. If all these properties of fluorapatite are taken into account, their combination can lead to new materials for a wide range of 
biomedical applications., U ovom radu biće prikazane supstitucije metala u kristalnom matriksu fluorapatita s ciljem dobijanja nove vrste biomedicinskih materijala. Fluorapatit se poslednjih decenija intenzivno ispituje kao materijal za izgradnju luminiscentnih materijala za široki spektar primena, od fluorescentnih lampi, preko LED dioda, do nanomaterijala za biomedicinske aplikacije visoke tehnologije. Fluorapatit se pokazao kao netoksičan, izuzetno hemijski stabilan i otporan na koroziju, a uz to i biokompatibilan, bioaktivan i osteokonduktivan. Takođe, fluorapatit se pokazao i kao sjajan materijal domaćin za dopiranje luminiscentnih centara u vidu trovalentnih jona retkih zemalja i prelaznih metala. Zahvaljujući položaju atoma fluora u strukturi kristalne rešetke fluprapatita, u centru Ca2 trougla (6h položaj) u ogledalskim ravnima na z = 1/4 i z = 3/4, ovakva struktura je izuzetno stabilna i postojana. Takođe, atom fluora je odgovoran što fluorapatit, za razliku od hidroksiapatita, pokazuje i antibakterijska svojstva. Dopiranjem različitih metala u ovu matricu niske fononske energije, mogu se konstruisati luminiscentni materijali koji će emitovati svetlost u ultravioletnoj, vidljivoj ili infracrvenoj oblasti elektromagnetnog spektra. Ako se uzmu u obzir sve ove osobine fluorapatita, njihovom kombinacijom mogu se dobiti novi materijali za široki 
spektar biomedicinskih primena.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection",
title = "New biomedical materials based on metal-doped fluorapatite, Novi biomedicinski materijali na bazi metal dopiranih fluorapatita",
pages = "165-159"
}

Milojkov, D., Sokić, M.,& Manojlović, V.. (2021). New biomedical materials based on metal-doped fluorapatite. in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM., 159-165.

Milojkov D, Sokić M, Manojlović V. New biomedical materials based on metal-doped fluorapatite. in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection. 2021;:159-165..

Milojkov, Dušan, Sokić, Miroslav, Manojlović, Vaso, "New biomedical materials based on metal-doped fluorapatite" in XXIII YuCorr International Conference. Meeting point of the science and practice in the fields of corrosion, materials and environmental protection (2021):159-165.

TY  - JOUR
AU  - Sokić, Miroslav
AU  - Marković, Branislav
AU  - Milojkov, Dušan
AU  - Patarić, Aleksandra
AU  - Bugarčić, Mladen
AU  - Jovanović, Gvozden
AU  - Pantović-Spajić, Katarina
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/558
AB  - U radu su prikazani i diskutovani rezultati luženja polimetalnog sulfidnog Cu-Zn-Pb koncentrata rastvorom natrijum-nitrata i sumporne kiseline pri atmosferskom pritisku. Prikazan je hemijski i mineraloški sastav polaznog koncentrata i čvrstih ostataka nakon procesa luženja. Hemijske reakcije luženja i mogućnosti njihovog odvijanja analizirane su primenom termodinamičke analize na osnovu izračunatih Gibbsovih energija i analize E-pH dijagrama. Eksperimentalno je analiziran uticaj temperature i vremena na stepen izluženja korisnih metala iz sulfidnog koncentrata. Pokazano je da je moguće dobiti bakar, cink i železo u rastvoru u obliku sulfata, dok olovo u obliku anglesita (PbSO4) ostaje u čvrstom ostatku nakon procesa luženja. Železo se oksidiše u Fe (III) -sulfat, koji učestvuje u luženju sulfidnih minerala i prelazi u Fe (II) -sulfat.
AB  - The results of polymetallic sulphide Cu-Zn-Pb concentrate leaching with sulphuric acid in the presence of sodium nitrate as an oxidizing agent, at atmospheric pressure, are presented and discussed. Chemical composition and phase ratio of the starting concentrate and solid residuals after the leaching process are shown. Chemical reactions of leaching and their thermodynamic probabilities are predicted based on the calculated Gibbs energies and analysis of E-pH diagrams. The influence of temperature and time on the leaching degree of the concentrate's components is experimentally determined. It is shown that it is possible to obtain copper, zinc and iron in a solute form, while lead in the anglesite (PbSO4) form remains in the solid residual after the leaching process. The iron is being oxidized to Fe(III)-sulphate, which takes part in a sulphide leached minerals and turns into Fe(II)-sulphate.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Luženje polimetalnog Cu-Zn-Pb koncentrata natrijum-nitratom i sumpornom kiselinom
T1  - Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid
EP  - 436
IS  - 4
SP  - 426
VL  - 76
DO  - 10.5937/tehnika2104426S
UR  - conv_33
ER  - 

@article{
author = "Sokić, Miroslav and Marković, Branislav and Milojkov, Dušan and Patarić, Aleksandra and Bugarčić, Mladen and Jovanović, Gvozden and Pantović-Spajić, Katarina",
year = "2021",
abstract = "U radu su prikazani i diskutovani rezultati luženja polimetalnog sulfidnog Cu-Zn-Pb koncentrata rastvorom natrijum-nitrata i sumporne kiseline pri atmosferskom pritisku. Prikazan je hemijski i mineraloški sastav polaznog koncentrata i čvrstih ostataka nakon procesa luženja. Hemijske reakcije luženja i mogućnosti njihovog odvijanja analizirane su primenom termodinamičke analize na osnovu izračunatih Gibbsovih energija i analize E-pH dijagrama. Eksperimentalno je analiziran uticaj temperature i vremena na stepen izluženja korisnih metala iz sulfidnog koncentrata. Pokazano je da je moguće dobiti bakar, cink i železo u rastvoru u obliku sulfata, dok olovo u obliku anglesita (PbSO4) ostaje u čvrstom ostatku nakon procesa luženja. Železo se oksidiše u Fe (III) -sulfat, koji učestvuje u luženju sulfidnih minerala i prelazi u Fe (II) -sulfat., The results of polymetallic sulphide Cu-Zn-Pb concentrate leaching with sulphuric acid in the presence of sodium nitrate as an oxidizing agent, at atmospheric pressure, are presented and discussed. Chemical composition and phase ratio of the starting concentrate and solid residuals after the leaching process are shown. Chemical reactions of leaching and their thermodynamic probabilities are predicted based on the calculated Gibbs energies and analysis of E-pH diagrams. The influence of temperature and time on the leaching degree of the concentrate's components is experimentally determined. It is shown that it is possible to obtain copper, zinc and iron in a solute form, while lead in the anglesite (PbSO4) form remains in the solid residual after the leaching process. The iron is being oxidized to Fe(III)-sulphate, which takes part in a sulphide leached minerals and turns into Fe(II)-sulphate.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Luženje polimetalnog Cu-Zn-Pb koncentrata natrijum-nitratom i sumpornom kiselinom, Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid",
pages = "436-426",
number = "4",
volume = "76",
doi = "10.5937/tehnika2104426S",
url = "conv_33"
}

Sokić, M., Marković, B., Milojkov, D., Patarić, A., Bugarčić, M., Jovanović, G.,& Pantović-Spajić, K.. (2021). Luženje polimetalnog Cu-Zn-Pb koncentrata natrijum-nitratom i sumpornom kiselinom. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 76(4), 426-436.
https://doi.org/10.5937/tehnika2104426S
conv_33

Sokić M, Marković B, Milojkov D, Patarić A, Bugarčić M, Jovanović G, Pantović-Spajić K. Luženje polimetalnog Cu-Zn-Pb koncentrata natrijum-nitratom i sumpornom kiselinom. in Tehnika. 2021;76(4):426-436.
doi:10.5937/tehnika2104426S
conv_33 .

Sokić, Miroslav, Marković, Branislav, Milojkov, Dušan, Patarić, Aleksandra, Bugarčić, Mladen, Jovanović, Gvozden, Pantović-Spajić, Katarina, "Luženje polimetalnog Cu-Zn-Pb koncentrata natrijum-nitratom i sumpornom kiselinom" in Tehnika, 76, no. 4 (2021):426-436,
https://doi.org/10.5937/tehnika2104426S .,
conv_33 .

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Sokić, Miroslav
AU  - Radosavljević-Mihajlović, Ana
AU  - Stanić, Vojislav
AU  - Manojlović, Vaso
AU  - Mutavdzić, Dragosav R.
AU  - Milanović, Marija
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/568
AB  - Coupled substitution of fluorapatite (FAP) crystal lattice plays an important role in the engineering of optically active nanomaterials. Uniform fluorapatite nanopowders doped with praseodymium (Pr3+) and carbonate (CO32-) ions have been successfully synthesized by precipitation method under room temperature (25 degrees C). The structural, morphological, chemical and optical properties of monophase material were characterized by X-ray diffraction (XRD), Fourier Transform Infrared and Far Infrared Spectroscopy (FTIR and FIR, respectively), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), Transmission Electron Microscopy (TEM) and Photoluminescence Spectroscopy (PL). Coupled substitution of FAP crystal lattice with Pr3+ and CO32- reduces the crystallite size with a constant c/a ratio of 1.72. FTIR study showed that synthesized nanopowders were AB-type CO32- substitution, and FIR study revealed new Pr-O vibrations. TEM analysis was found that synthesized nanopowders were composed of irregular spheres in the nanometer range. The fluorescence of FAP nanoparticles was in the violet-blue region of the visible part of the spectrum. When Pr3+ was doped in a lattice, the violet-blue emission becomes sharper due to reabsorption. MCR-ALS analyses of fluorescence spectra indicated the shift of the maximum to the blue color with the increase in the concentration of Pr3+ ions. Additionally, luminescent nanopowders demonstrated significant antibacterial activity against Escherichia coli. As the obtained nanoparticles showed a good absorption of ultraviolet A light and reabsorption of blue-green luminescence, they are suitable for further development of optically active nanomaterials for light filtering. Optically active PrCFAP nanopowders with antibacterial properties may be promising additives for the development of multifunctional cosmetic and health care products.
PB  - MDPI, Basel
T2  - Metals
T1  - Influence of Pr3+ and CO32- Ions Coupled Substitution on Structural, Optical and Antibacterial Properties of Fluorapatite Nanopowders Obtained by Precipitation
IS  - 9
VL  - 11
DO  - 10.3390/met11091384
UR  - conv_917
ER  - 

@article{
author = "Milojkov, Dušan and Sokić, Miroslav and Radosavljević-Mihajlović, Ana and Stanić, Vojislav and Manojlović, Vaso and Mutavdzić, Dragosav R. and Milanović, Marija",
year = "2021",
abstract = "Coupled substitution of fluorapatite (FAP) crystal lattice plays an important role in the engineering of optically active nanomaterials. Uniform fluorapatite nanopowders doped with praseodymium (Pr3+) and carbonate (CO32-) ions have been successfully synthesized by precipitation method under room temperature (25 degrees C). The structural, morphological, chemical and optical properties of monophase material were characterized by X-ray diffraction (XRD), Fourier Transform Infrared and Far Infrared Spectroscopy (FTIR and FIR, respectively), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), Transmission Electron Microscopy (TEM) and Photoluminescence Spectroscopy (PL). Coupled substitution of FAP crystal lattice with Pr3+ and CO32- reduces the crystallite size with a constant c/a ratio of 1.72. FTIR study showed that synthesized nanopowders were AB-type CO32- substitution, and FIR study revealed new Pr-O vibrations. TEM analysis was found that synthesized nanopowders were composed of irregular spheres in the nanometer range. The fluorescence of FAP nanoparticles was in the violet-blue region of the visible part of the spectrum. When Pr3+ was doped in a lattice, the violet-blue emission becomes sharper due to reabsorption. MCR-ALS analyses of fluorescence spectra indicated the shift of the maximum to the blue color with the increase in the concentration of Pr3+ ions. Additionally, luminescent nanopowders demonstrated significant antibacterial activity against Escherichia coli. As the obtained nanoparticles showed a good absorption of ultraviolet A light and reabsorption of blue-green luminescence, they are suitable for further development of optically active nanomaterials for light filtering. Optically active PrCFAP nanopowders with antibacterial properties may be promising additives for the development of multifunctional cosmetic and health care products.",
publisher = "MDPI, Basel",
journal = "Metals",
title = "Influence of Pr3+ and CO32- Ions Coupled Substitution on Structural, Optical and Antibacterial Properties of Fluorapatite Nanopowders Obtained by Precipitation",
number = "9",
volume = "11",
doi = "10.3390/met11091384",
url = "conv_917"
}

Milojkov, D., Sokić, M., Radosavljević-Mihajlović, A., Stanić, V., Manojlović, V., Mutavdzić, D. R.,& Milanović, M.. (2021). Influence of Pr3+ and CO32- Ions Coupled Substitution on Structural, Optical and Antibacterial Properties of Fluorapatite Nanopowders Obtained by Precipitation. in Metals
MDPI, Basel., 11(9).
https://doi.org/10.3390/met11091384
conv_917

Milojkov D, Sokić M, Radosavljević-Mihajlović A, Stanić V, Manojlović V, Mutavdzić DR, Milanović M. Influence of Pr3+ and CO32- Ions Coupled Substitution on Structural, Optical and Antibacterial Properties of Fluorapatite Nanopowders Obtained by Precipitation. in Metals. 2021;11(9).
doi:10.3390/met11091384
conv_917 .

Milojkov, Dušan, Sokić, Miroslav, Radosavljević-Mihajlović, Ana, Stanić, Vojislav, Manojlović, Vaso, Mutavdzić, Dragosav R., Milanović, Marija, "Influence of Pr3+ and CO32- Ions Coupled Substitution on Structural, Optical and Antibacterial Properties of Fluorapatite Nanopowders Obtained by Precipitation" in Metals, 11, no. 9 (2021),
https://doi.org/10.3390/met11091384 .,
conv_917 .

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Silvestre, Oscar F.
AU  - Stanić, Vojislav
AU  - Janjić, Goran V.
AU  - Mutavdzić, Dragosav R.
AU  - Milanović, Marija
AU  - Nieder, Jana B.
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/534
AB  - Fluorapatite doped with rare-earth elements has a wide-range of biomedical applications. Here, a new type of fluorapatite nanocrystals doped with praseodymium (FAP-Pr) with excitation-emission profiles in visible part of the spectrum is fabricated. Energy levels of Pr3+ activator ion contain metastable multiples states that offer the possibility of efficient multicolor emission lines in FAP nanocrystals. Three types of FAP-Pr nanocrystals with 0.1%, 0.5% and 1% atomic percent of Pr3+ (along with the undoped FAP control sample) are studied. Their novel chemical production method is described, the FAP-Pr nanocrystals structure, biocompatibility and the suitability for cell imaging are analyzed. Physicochemical characterization confirms crystals down to nanometer size. In addition, quantum-chemical calculation predicts that Pr3+ ions are incorporated into the FAP crystal lattice at Ca2 (6 h) sites. In vitro viability results shows that FAP-Pr nanocrystals are nontoxic to live cells. Additionally, the cell uptake of the FAP-Pr nanocrystals is studied using fluorescence-based widefield and confocal microscopy. The nanocrystals show characteristic green emission at 545 nm (P-3(0)-> H-3(5) transition of Pr3+ ion) and orange emission at 600 nm (D-1(2)-> H-3(4)), which we use to discriminate from cell autofluorescence background. Orthogonal projections across 3D confocal stacks show that the nanocrystals are able to enter the cells positioning themselves within the cytoplasm. Overall, the new FAP-Pr nanocrystals are biocompatible and of the tested types, the 0.5% Pr3+ doped nanocrystals show the highest promise as a tracking nanoparticle probe for bioimaging applications.
PB  - Elsevier, Amsterdam
T2  - Journal of Luminescence
T1  - Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents
VL  - 217
DO  - 10.1016/j.jlumin.2019.116757
UR  - conv_869
ER  - 

@article{
author = "Milojkov, Dušan and Silvestre, Oscar F. and Stanić, Vojislav and Janjić, Goran V. and Mutavdzić, Dragosav R. and Milanović, Marija and Nieder, Jana B.",
year = "2020",
abstract = "Fluorapatite doped with rare-earth elements has a wide-range of biomedical applications. Here, a new type of fluorapatite nanocrystals doped with praseodymium (FAP-Pr) with excitation-emission profiles in visible part of the spectrum is fabricated. Energy levels of Pr3+ activator ion contain metastable multiples states that offer the possibility of efficient multicolor emission lines in FAP nanocrystals. Three types of FAP-Pr nanocrystals with 0.1%, 0.5% and 1% atomic percent of Pr3+ (along with the undoped FAP control sample) are studied. Their novel chemical production method is described, the FAP-Pr nanocrystals structure, biocompatibility and the suitability for cell imaging are analyzed. Physicochemical characterization confirms crystals down to nanometer size. In addition, quantum-chemical calculation predicts that Pr3+ ions are incorporated into the FAP crystal lattice at Ca2 (6 h) sites. In vitro viability results shows that FAP-Pr nanocrystals are nontoxic to live cells. Additionally, the cell uptake of the FAP-Pr nanocrystals is studied using fluorescence-based widefield and confocal microscopy. The nanocrystals show characteristic green emission at 545 nm (P-3(0)-> H-3(5) transition of Pr3+ ion) and orange emission at 600 nm (D-1(2)-> H-3(4)), which we use to discriminate from cell autofluorescence background. Orthogonal projections across 3D confocal stacks show that the nanocrystals are able to enter the cells positioning themselves within the cytoplasm. Overall, the new FAP-Pr nanocrystals are biocompatible and of the tested types, the 0.5% Pr3+ doped nanocrystals show the highest promise as a tracking nanoparticle probe for bioimaging applications.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Luminescence",
title = "Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents",
volume = "217",
doi = "10.1016/j.jlumin.2019.116757",
url = "conv_869"
}

Milojkov, D., Silvestre, O. F., Stanić, V., Janjić, G. V., Mutavdzić, D. R., Milanović, M.,& Nieder, J. B.. (2020). Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents. in Journal of Luminescence
Elsevier, Amsterdam., 217.
https://doi.org/10.1016/j.jlumin.2019.116757
conv_869

Milojkov D, Silvestre OF, Stanić V, Janjić GV, Mutavdzić DR, Milanović M, Nieder JB. Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents. in Journal of Luminescence. 2020;217.
doi:10.1016/j.jlumin.2019.116757
conv_869 .

Milojkov, Dušan, Silvestre, Oscar F., Stanić, Vojislav, Janjić, Goran V., Mutavdzić, Dragosav R., Milanović, Marija, Nieder, Jana B., "Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents" in Journal of Luminescence, 217 (2020),
https://doi.org/10.1016/j.jlumin.2019.116757 .,
conv_869 .

TY  - THES
AU  - Milojkov, Dušan
PY  - 2020
UR  - https://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija159489980394642.pdf?controlNumber=(BISIS)1
UR  - https://www.cris.uns.ac.rs/record.jsf?recordId=114851&source=NaRDuS&language=sr
UR  - https://www.cris.uns.ac.rs/DownloadFileServlet/IzvestajKomisije159489981426786.pdf?controlNumber=(BI
UR  - /DownloadFileServlet/IzvestajKomisije159489981426786.pdf?controlNumber=(BISIS)114851&fileName=159489
UR  - https://nardus.mpn.gov.rs/handle/123456789/17944
UR  - https://ritnms.itnms.ac.rs/handle/123456789/20
AB  - Luminescentni nanokristali (nanofosfori) na bazi fluorapatita (FAP-a) dopirani elementima retkih zemalja idealni su kontrastni agenti za bio-medicinske primene, kao što su detekcije, snimanja, praćenja i terapije ćelija kancera. Kancer je jedna od najčešćih bolesti modernog doba čiji uspeh lečenja zavisi od rane dijagnostike i neinvazivnog tretmana. Luminescentne nanočestice mogu uneti inovativnu paradigmu u lečenje kancera kombinovanjem biosnimanja, dijagnostike i tretmana. Za studije fluorescentnih biosnimanja nanokristali fluorapatita dopirani retkim zemljama kao kontrastni agenti pružaju značajne prednosti u vidu velikih kontrasta i dugotrajnosti luminescencije, i što je još važnije visoke biokompatibilnosti, netoksičnosti i bioaktivnosti. Glavni ciljevi ove doktorske disertacije su sinteza novih luminescentnih multifotonskih bionanomaterijala na bazi fluorapatita dopiranih jonima prazeodimijuma (Pr3+), njihova karakterizacija i evaluacija  primene za fluorescentna biosnimanja kancera. Sintezom nanoprahova u umerenim uslovima metodom ko-precipitacije, a potom sušenjem na 110 oC i kalcinacijom na temperaturama od 700 i 1000 oC očekuje se pronalaženje najboljih uslova za dobijanje novih nanofosfora koji bi našli i različite bio-medicinske primene u oblasti fluorescentnih biosnimanja. Proučavane su tri vrste PrFAP nanokristala, sa 0,1%, 0,5% i 1% atomskih procenta Pr3+, zajedno sa nedopiranim FAP kontrolnim uzorkom. Nivoi energije aktivator jona Pr3+ sadrže metastabilna multipletna stanja koja nude mogućnosti efikasnih emisionih linija u više boja u FAP nanokristalima, kao i u infracrvenoj i ultravioletnoj oblasti spektra. Metodom ko-precipitacije na sobnoj temperaturi (25 oC), a potom sušenjem na 110 oC, sintetisani su monofazni heksagonalni nanokristali PrFAPs nepravilnog sfernog oblika. Termičkom analizom sintetisanih uzoraka, na osnovu detektovanih temperaturnih opsega procesa dekarbonacije i dehidroksilacije, utvrđene su temperature kalcinacije od 700 i 1000 oC. Termička analiza i karakterizacija uzoraka su pokazale da Pr3+ joni dovode do stabilizacije FAP strukture na višim temperaturama, što je pripisano unosu lantanoidnih jona sa specifičnim magnetnim osobinama u sistem i stvaranju jačih privlačnih sila sa O2- anjonima. Nanokristali sušeni na 100 oC i kalcinisani na 1000 oC, zbog prisustva defekata kristalne rešetke koji zadržavaju emisiju Pr3+ jona, nisu pokazali luminescentne karakteristike od značaja za primene u medicinskim fluorescentnim biosnimanjima. Kalcinacijom uzoraka na 700 oC izrađen je novi tip aktiviranih fluorapatitnih nanokristala dopiranih prazeodimijumom (PrFAPa) sa ekscitaciono-emisionim profilima u vidljivom delu spektra. Fizičko-hemijska karakterizacija potvrdila je sferne kristale heksagonalne strukture do nanometrske veličine od oko 20 nm. Kvantno-hemijske kalkulacije predvidele su da se joni Pr3+ ugrađuju u kristalnu rešetku FAP nanokristala na položaju Ca2 (6h), što je praćeno deformacijama pozicije F- jona. Pretpostavljeni mehanizam supstitucije je jedan jon Pr3+ za jedan Ca2+, s delimičnom supstitucijom anjona F– sa O2– i OH– i stvaranjem vakansi usled postizanja neutralnosti sistema. Rezultati in vitro biokompatibilnosti i hemokompatibilnosti pokazali su da nanokristali PrFAPa nisu toksični za žive ćelije. Pored toga, internalizacija PrFAPa nanokristala od strane ćelija kancera kože (A431) i pluća (A549) je proučavana korišćenjem konfokalne mikroskopije i mikroskopije širokog polja zasnovane na fluorescenciji. Nanokristali pokazuju karakterističnu zelenu emisiju na 545 nm (3P0→3H5 tranzicija Pr3+ jona) i narandžastu emisiju na 600 nm (1D2→3H4), koje su korišćene za razlikovanje od pozadinske autofluorescencije ćelije. Studije dobijenih slika konfokalnom mikroskopijom u plavom, zelenom i crvenom kanalu su otkrile da nanokristali mogu da prepoznaju ćelijsku površinu i da se lepe za nju, ali nisu potvrdile ulazak nanokristala u ćelije. Mikroskopija širokog polja je detektovala emisione prelaze u zelenoj i narandžastoj boji i potvrdila da luminescentni signal dolazi iz unutrašnjosti ćelija. Korišćenjem rezonantne ekscitacije od 488 nm i emisije od 600 nm PrFAPa nanokristala, konfokalnom mikroskopijom ekstrahovan je signal fluorescencije iz unutrašnjosti ćelija kancera. Ortogonalne projekcije u 3D konfokalnim ravnima pokazuju da su nanokristali u stanju da uđu u ćelije kancera i da se raspoređuju po citoplazmi. Sveukupno, ovako dobijeni nanokristali PrFAPa su biokompatibilni i od testiranih uzoraka, aktivirani nanokristali dopirani sa 0,5% Pr3+ pokazuju najviše potencijala za primenu u medicinskim fluorescentnim biosnimanjima kao kontrastni agenti.
AB  - Luminescent nanocrystals (nanophosphorus) based on fluorapatite (FAP) doped with rare earth elements are ideal contrast agents for biomedical applications such as cancer cell detection, imaging, tracking and therapy. Cancer is one of the most common diseases of the modern times whose success of the cure depends on early diagnosis and non-invasive treatment. Luminescent nanoparticles can bring an innovative paradigm into the treatment of cancer by combining bioimaging, diagnostics and treatment. Rare earth doped fluorapatite nanocrystals as contrast agents for studies of fluorescence bioimaging, offer significant advantages in terms of high contrasts and long-term luminescence, and more importantly high biocompatibility, non-toxicity and bioactivity. The main objectives of this doctoral dissertation are the synthesis of novel luminescent multiphoton bionanomaterials based on fluorapatites doped with praseodymium ions (Pr3+), their characterization and evaluation of their application for cancer fluorescence bioimaging. Synthesis of nanopowders under moderate conditions by the co-precipitation method, followed by dried at 110 °C and calcination at 700 and 1000 °C, is expected to find the best conditions for obtaining new nanophosphors that would find different bio- medical applications in the field of fluorescence bioimaging. Three types of PrFAP nanocrystals were studied, with 0,1%, 0,5%, and 1% atomic percentages of Pr3+, together with an undoped FAP control sample. Energy levels of the Pr3+ ion activator contain metastable multiplet states that offer the possibility of efficient multi-color emission lines in FAP nanocrystals as well as in the infrared and ultraviolet regions of the spectrum. Single-phase hexagonal nanocrystals PrFAPs of irregular spherical shape were synthesized by the method of co-precipitation at room temperature (25 oC) and then drying at 110 oC. Thermal analysis of the synthesized samples, based on the detected temperature ranges of the decarbonation and dehydroxylation processes, determined calcination temperatures of 700 and 1000 oC. Thermal analysis with characterization showed that Pr3+ ions lead to stabilization of the FAP structure at higher temperatures, which was attributed to the entry of lanthanoid ions with specific magnetic properties into the system and the creation of stronger attractive forces with O2- anions. Nanocrystals dried at 100 oC and calcined at 1000 oC, due to the presence of crystal lattice defects that quench the emission of Pr3+ ions, did not show luminescent characteristics of significance for applications in medical fluorescence imaging. Calcination of the samples at 700 oC produced a new type of activated praseodymium doped fluorapatite nanocrystals (PrFAPa) with excitation-emission profiles in the visible part of the spectrum. Physicochemical characterization confirmed spherical crystals of hexagonal structure up to a nanometer size of about 20 nm. Quantum-chemical calculations predicted that Pr3+ ions would be embedded in the crystal lattice of FAP nanocrystals at the Ca2 position (6h), which was followed by deformations of the F- ion position. The assumed substitution mechanism is one Pr3+ ion for one Ca2+, with partial substitution of F– anions with O2– and OH– and creation of vacancies due to achieving system neutrality. The results of in vitro biocompatibility and hemocompatibility showed that PrFAP nanocrystals were not toxic to living cells. In addition, the internalization of PrFAPa nanocrystals by skin (A431) and lung (A549) cancer cells was studied using fluorescence-based confocal microscopy and wide-field microscopy. The nanocrystals show characteristic green emission at 545 nm (3P0→3H5 transition of Pr3+ ion) and orange emission at 600 nm (1D2→3H4), which we use to discriminate from cell autofluorescence. Studies of the images obtained by confocal microscopy in the blue, green, and red channels revealed that nanocrystals could recognize the cell surface and adhere to it, but they did not confirm the entry of nanocrystals into the cells. The wide-field microscopy detected emission transitions in green and orange color, and confirmed that the luminescent signal was coming from inside the cells. Using resonant excitation of PrFAP nanocrystals at 488 nm and emission of 600 nm, confocal microscopy extracted the fluorescence signal from inside the cancer cells. Orthogonal projections across 3D confocal stacks show that the nanocrystals are able to enter the cells positioning themselves within the cytoplasm. Overall, the obtained PrFAPa nanocrystals are biocompatible and of the tested types, the 0,5% Pr3+ doped nanocrystals show the highest promise as a tracking nanoparticle probe for bioimaging applications.
PB  - Univerzitet u Novom Sadu, Tehnološki fakultet
T1  - Dobijanje nanofosfora na bazi fluorapatita dopirani Pr3+ jonima za bio-medicinske primene
T1  - Preparation of fluorapatite-based nanophosphorus doped with Pr3+ ions for bio-medical applications
UR  - https://hdl.handle.net/21.15107/rcub_nardus_17944
UR  - t-11067
ER  - 

@phdthesis{
author = "Milojkov, Dušan",
year = "2020",
abstract = "Luminescentni nanokristali (nanofosfori) na bazi fluorapatita (FAP-a) dopirani elementima retkih zemalja idealni su kontrastni agenti za bio-medicinske primene, kao što su detekcije, snimanja, praćenja i terapije ćelija kancera. Kancer je jedna od najčešćih bolesti modernog doba čiji uspeh lečenja zavisi od rane dijagnostike i neinvazivnog tretmana. Luminescentne nanočestice mogu uneti inovativnu paradigmu u lečenje kancera kombinovanjem biosnimanja, dijagnostike i tretmana. Za studije fluorescentnih biosnimanja nanokristali fluorapatita dopirani retkim zemljama kao kontrastni agenti pružaju značajne prednosti u vidu velikih kontrasta i dugotrajnosti luminescencije, i što je još važnije visoke biokompatibilnosti, netoksičnosti i bioaktivnosti. Glavni ciljevi ove doktorske disertacije su sinteza novih luminescentnih multifotonskih bionanomaterijala na bazi fluorapatita dopiranih jonima prazeodimijuma (Pr3+), njihova karakterizacija i evaluacija  primene za fluorescentna biosnimanja kancera. Sintezom nanoprahova u umerenim uslovima metodom ko-precipitacije, a potom sušenjem na 110 oC i kalcinacijom na temperaturama od 700 i 1000 oC očekuje se pronalaženje najboljih uslova za dobijanje novih nanofosfora koji bi našli i različite bio-medicinske primene u oblasti fluorescentnih biosnimanja. Proučavane su tri vrste PrFAP nanokristala, sa 0,1%, 0,5% i 1% atomskih procenta Pr3+, zajedno sa nedopiranim FAP kontrolnim uzorkom. Nivoi energije aktivator jona Pr3+ sadrže metastabilna multipletna stanja koja nude mogućnosti efikasnih emisionih linija u više boja u FAP nanokristalima, kao i u infracrvenoj i ultravioletnoj oblasti spektra. Metodom ko-precipitacije na sobnoj temperaturi (25 oC), a potom sušenjem na 110 oC, sintetisani su monofazni heksagonalni nanokristali PrFAPs nepravilnog sfernog oblika. Termičkom analizom sintetisanih uzoraka, na osnovu detektovanih temperaturnih opsega procesa dekarbonacije i dehidroksilacije, utvrđene su temperature kalcinacije od 700 i 1000 oC. Termička analiza i karakterizacija uzoraka su pokazale da Pr3+ joni dovode do stabilizacije FAP strukture na višim temperaturama, što je pripisano unosu lantanoidnih jona sa specifičnim magnetnim osobinama u sistem i stvaranju jačih privlačnih sila sa O2- anjonima. Nanokristali sušeni na 100 oC i kalcinisani na 1000 oC, zbog prisustva defekata kristalne rešetke koji zadržavaju emisiju Pr3+ jona, nisu pokazali luminescentne karakteristike od značaja za primene u medicinskim fluorescentnim biosnimanjima. Kalcinacijom uzoraka na 700 oC izrađen je novi tip aktiviranih fluorapatitnih nanokristala dopiranih prazeodimijumom (PrFAPa) sa ekscitaciono-emisionim profilima u vidljivom delu spektra. Fizičko-hemijska karakterizacija potvrdila je sferne kristale heksagonalne strukture do nanometrske veličine od oko 20 nm. Kvantno-hemijske kalkulacije predvidele su da se joni Pr3+ ugrađuju u kristalnu rešetku FAP nanokristala na položaju Ca2 (6h), što je praćeno deformacijama pozicije F- jona. Pretpostavljeni mehanizam supstitucije je jedan jon Pr3+ za jedan Ca2+, s delimičnom supstitucijom anjona F– sa O2– i OH– i stvaranjem vakansi usled postizanja neutralnosti sistema. Rezultati in vitro biokompatibilnosti i hemokompatibilnosti pokazali su da nanokristali PrFAPa nisu toksični za žive ćelije. Pored toga, internalizacija PrFAPa nanokristala od strane ćelija kancera kože (A431) i pluća (A549) je proučavana korišćenjem konfokalne mikroskopije i mikroskopije širokog polja zasnovane na fluorescenciji. Nanokristali pokazuju karakterističnu zelenu emisiju na 545 nm (3P0→3H5 tranzicija Pr3+ jona) i narandžastu emisiju na 600 nm (1D2→3H4), koje su korišćene za razlikovanje od pozadinske autofluorescencije ćelije. Studije dobijenih slika konfokalnom mikroskopijom u plavom, zelenom i crvenom kanalu su otkrile da nanokristali mogu da prepoznaju ćelijsku površinu i da se lepe za nju, ali nisu potvrdile ulazak nanokristala u ćelije. Mikroskopija širokog polja je detektovala emisione prelaze u zelenoj i narandžastoj boji i potvrdila da luminescentni signal dolazi iz unutrašnjosti ćelija. Korišćenjem rezonantne ekscitacije od 488 nm i emisije od 600 nm PrFAPa nanokristala, konfokalnom mikroskopijom ekstrahovan je signal fluorescencije iz unutrašnjosti ćelija kancera. Ortogonalne projekcije u 3D konfokalnim ravnima pokazuju da su nanokristali u stanju da uđu u ćelije kancera i da se raspoređuju po citoplazmi. Sveukupno, ovako dobijeni nanokristali PrFAPa su biokompatibilni i od testiranih uzoraka, aktivirani nanokristali dopirani sa 0,5% Pr3+ pokazuju najviše potencijala za primenu u medicinskim fluorescentnim biosnimanjima kao kontrastni agenti., Luminescent nanocrystals (nanophosphorus) based on fluorapatite (FAP) doped with rare earth elements are ideal contrast agents for biomedical applications such as cancer cell detection, imaging, tracking and therapy. Cancer is one of the most common diseases of the modern times whose success of the cure depends on early diagnosis and non-invasive treatment. Luminescent nanoparticles can bring an innovative paradigm into the treatment of cancer by combining bioimaging, diagnostics and treatment. Rare earth doped fluorapatite nanocrystals as contrast agents for studies of fluorescence bioimaging, offer significant advantages in terms of high contrasts and long-term luminescence, and more importantly high biocompatibility, non-toxicity and bioactivity. The main objectives of this doctoral dissertation are the synthesis of novel luminescent multiphoton bionanomaterials based on fluorapatites doped with praseodymium ions (Pr3+), their characterization and evaluation of their application for cancer fluorescence bioimaging. Synthesis of nanopowders under moderate conditions by the co-precipitation method, followed by dried at 110 °C and calcination at 700 and 1000 °C, is expected to find the best conditions for obtaining new nanophosphors that would find different bio- medical applications in the field of fluorescence bioimaging. Three types of PrFAP nanocrystals were studied, with 0,1%, 0,5%, and 1% atomic percentages of Pr3+, together with an undoped FAP control sample. Energy levels of the Pr3+ ion activator contain metastable multiplet states that offer the possibility of efficient multi-color emission lines in FAP nanocrystals as well as in the infrared and ultraviolet regions of the spectrum. Single-phase hexagonal nanocrystals PrFAPs of irregular spherical shape were synthesized by the method of co-precipitation at room temperature (25 oC) and then drying at 110 oC. Thermal analysis of the synthesized samples, based on the detected temperature ranges of the decarbonation and dehydroxylation processes, determined calcination temperatures of 700 and 1000 oC. Thermal analysis with characterization showed that Pr3+ ions lead to stabilization of the FAP structure at higher temperatures, which was attributed to the entry of lanthanoid ions with specific magnetic properties into the system and the creation of stronger attractive forces with O2- anions. Nanocrystals dried at 100 oC and calcined at 1000 oC, due to the presence of crystal lattice defects that quench the emission of Pr3+ ions, did not show luminescent characteristics of significance for applications in medical fluorescence imaging. Calcination of the samples at 700 oC produced a new type of activated praseodymium doped fluorapatite nanocrystals (PrFAPa) with excitation-emission profiles in the visible part of the spectrum. Physicochemical characterization confirmed spherical crystals of hexagonal structure up to a nanometer size of about 20 nm. Quantum-chemical calculations predicted that Pr3+ ions would be embedded in the crystal lattice of FAP nanocrystals at the Ca2 position (6h), which was followed by deformations of the F- ion position. The assumed substitution mechanism is one Pr3+ ion for one Ca2+, with partial substitution of F– anions with O2– and OH– and creation of vacancies due to achieving system neutrality. The results of in vitro biocompatibility and hemocompatibility showed that PrFAP nanocrystals were not toxic to living cells. In addition, the internalization of PrFAPa nanocrystals by skin (A431) and lung (A549) cancer cells was studied using fluorescence-based confocal microscopy and wide-field microscopy. The nanocrystals show characteristic green emission at 545 nm (3P0→3H5 transition of Pr3+ ion) and orange emission at 600 nm (1D2→3H4), which we use to discriminate from cell autofluorescence. Studies of the images obtained by confocal microscopy in the blue, green, and red channels revealed that nanocrystals could recognize the cell surface and adhere to it, but they did not confirm the entry of nanocrystals into the cells. The wide-field microscopy detected emission transitions in green and orange color, and confirmed that the luminescent signal was coming from inside the cells. Using resonant excitation of PrFAP nanocrystals at 488 nm and emission of 600 nm, confocal microscopy extracted the fluorescence signal from inside the cancer cells. Orthogonal projections across 3D confocal stacks show that the nanocrystals are able to enter the cells positioning themselves within the cytoplasm. Overall, the obtained PrFAPa nanocrystals are biocompatible and of the tested types, the 0,5% Pr3+ doped nanocrystals show the highest promise as a tracking nanoparticle probe for bioimaging applications.",
publisher = "Univerzitet u Novom Sadu, Tehnološki fakultet",
title = "Dobijanje nanofosfora na bazi fluorapatita dopirani Pr3+ jonima za bio-medicinske primene, Preparation of fluorapatite-based nanophosphorus doped with Pr3+ ions for bio-medical applications",
url = "https://hdl.handle.net/21.15107/rcub_nardus_17944, t-11067"
}

Milojkov, D.. (2020). Dobijanje nanofosfora na bazi fluorapatita dopirani Pr3+ jonima za bio-medicinske primene. 
Univerzitet u Novom Sadu, Tehnološki fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_17944

Milojkov D. Dobijanje nanofosfora na bazi fluorapatita dopirani Pr3+ jonima za bio-medicinske primene. 2020;.
https://hdl.handle.net/21.15107/rcub_nardus_17944 .

Milojkov, Dušan, "Dobijanje nanofosfora na bazi fluorapatita dopirani Pr3+ jonima za bio-medicinske primene" (2020),
https://hdl.handle.net/21.15107/rcub_nardus_17944 .

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Stanić, Vojislav
AU  - Dimović, S. D.
AU  - Mutavdzić, Dragosav R.
AU  - Živković-Radovanović, Vukosava
AU  - Janjić, Goran V.
AU  - Radotić, Ksenija
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/509
AB  - In the present study we have analyzed effects of Ag+ ions doping on energetic profiles of nanophosphors materials based on fluorapatite crystal system. The UV radiation absorption and luminescence properties of monophase fluorapatite (FAP) and Ag+ doped fluorapatite (AgFAP) nanomaterials obtained by neutralization method were investigated using the photoluminescence spectrophotometry. The excitation-emission profiles of nanomaterials were analyzed statistically by MCR-ALS method and number of fluorophores was extracted. FAP lattice absorbed light at 350 nm in the UVA part of spectrum, and with increasing concentration of Ag+ ions new absorption maximum appeared at 270 nm in the UVC part. Fluorescence of FAP nanoparticles was in violet region of visible part of the spectrum, with a red shift to the green region when Ag+ was doped in lattice. MCR-ALS analyses of fluorescence spectra confirm formation of two maxima, at 484 and 505 nm, as a consequence of Ag+ ions doping in FAP lattice at Cal (4f) sites. The results of quantum chemical calculations showed that an Ag+ ion is stronger bonded to the binding site 1 (-1352.6 kcal/mol) than to the binding site 2 (-1249.0 kcal/mol). Considering that AgFAP1 nanopowder absorbs photons over all part of UV radiation spectrum, this material might be used as potential radiation protective nanomaterial.
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica A
T1  - Effects of Ag+ Ion Doping on UV Radiation Absorption and Luminescence Profiles of Fluorapatite Nanomaterials Obtained by Neutralization Method
EP  - 91
IS  - 1
SP  - 86
VL  - 136
DO  - 10.12693/APhysPolA.136.86
UR  - conv_863
ER  - 

@article{
author = "Milojkov, Dušan and Stanić, Vojislav and Dimović, S. D. and Mutavdzić, Dragosav R. and Živković-Radovanović, Vukosava and Janjić, Goran V. and Radotić, Ksenija",
year = "2019",
abstract = "In the present study we have analyzed effects of Ag+ ions doping on energetic profiles of nanophosphors materials based on fluorapatite crystal system. The UV radiation absorption and luminescence properties of monophase fluorapatite (FAP) and Ag+ doped fluorapatite (AgFAP) nanomaterials obtained by neutralization method were investigated using the photoluminescence spectrophotometry. The excitation-emission profiles of nanomaterials were analyzed statistically by MCR-ALS method and number of fluorophores was extracted. FAP lattice absorbed light at 350 nm in the UVA part of spectrum, and with increasing concentration of Ag+ ions new absorption maximum appeared at 270 nm in the UVC part. Fluorescence of FAP nanoparticles was in violet region of visible part of the spectrum, with a red shift to the green region when Ag+ was doped in lattice. MCR-ALS analyses of fluorescence spectra confirm formation of two maxima, at 484 and 505 nm, as a consequence of Ag+ ions doping in FAP lattice at Cal (4f) sites. The results of quantum chemical calculations showed that an Ag+ ion is stronger bonded to the binding site 1 (-1352.6 kcal/mol) than to the binding site 2 (-1249.0 kcal/mol). Considering that AgFAP1 nanopowder absorbs photons over all part of UV radiation spectrum, this material might be used as potential radiation protective nanomaterial.",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica A",
title = "Effects of Ag+ Ion Doping on UV Radiation Absorption and Luminescence Profiles of Fluorapatite Nanomaterials Obtained by Neutralization Method",
pages = "91-86",
number = "1",
volume = "136",
doi = "10.12693/APhysPolA.136.86",
url = "conv_863"
}

Milojkov, D., Stanić, V., Dimović, S. D., Mutavdzić, D. R., Živković-Radovanović, V., Janjić, G. V.,& Radotić, K.. (2019). Effects of Ag+ Ion Doping on UV Radiation Absorption and Luminescence Profiles of Fluorapatite Nanomaterials Obtained by Neutralization Method. in Acta Physica Polonica A
Polish Acad Sciences Inst Physics, Warsaw., 136(1), 86-91.
https://doi.org/10.12693/APhysPolA.136.86
conv_863

Milojkov D, Stanić V, Dimović SD, Mutavdzić DR, Živković-Radovanović V, Janjić GV, Radotić K. Effects of Ag+ Ion Doping on UV Radiation Absorption and Luminescence Profiles of Fluorapatite Nanomaterials Obtained by Neutralization Method. in Acta Physica Polonica A. 2019;136(1):86-91.
doi:10.12693/APhysPolA.136.86
conv_863 .

Milojkov, Dušan, Stanić, Vojislav, Dimović, S. D., Mutavdzić, Dragosav R., Živković-Radovanović, Vukosava, Janjić, Goran V., Radotić, Ksenija, "Effects of Ag+ Ion Doping on UV Radiation Absorption and Luminescence Profiles of Fluorapatite Nanomaterials Obtained by Neutralization Method" in Acta Physica Polonica A, 136, no. 1 (2019):86-91,
https://doi.org/10.12693/APhysPolA.136.86 .,
conv_863 .

TY  - CONF
AU  - Janjić, Goran
AU  - Milojkov, Dušan
AU  - Mutavdžić, Dragosav
AU  - Živković-Radovanović, Vukosava
AU  - Radotić, Ksenija
AU  - Radosavljević-Mihajlović, Ana
AU  - Stanić, Vojislav
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/977
AB  - Srebrom dopirani fluorapatiti (AgFAP) su sintetisani postupkom neutralizacije 
(reakcija Ag2O rastvarenog u HF i H3PO4 sa suspenzijom Ca(OH)2). [1] Sintetisani 
uzorci AgFAP imali su procentnu zastupljenost jona srebra ([Ag/(Ag + Ca)]·100%) od 
0.001, 0.01 i 1%. Rendgenska difraktometrijska (XRD) analiza uzoraka FAP i AgFAP 
pokazala je da su položaji difrakcionih pikova slični i da su u skladu sa ASTM podacima za fluorapatite (Slika 1). FAP kao materijal ima kristalnu rešetku sa heksagonalnom P63/m prostornom grupom, sa dva strukturno različita položaja Ca2+ jona (Ca1 (4f) i Ca2 (6h) položaji). FTIR and SEM analize pokazale su da su čestice AgFAP uzoraka homogene i nano-veličine. Fluorescencija AgFAP uzoraka je pomerena ka zelenom regionu, u odnosu na fluorescenciju FAP nanočestica (u ljubičastom regionu vidljivog dela spektra). MCR ALS analize su pokazale formiranje dva maksimuma u AgFAP fluorescentnom spektru (na 420 i 520 nm), kao posledica dopiranja Ag+ jona u Ca1 (4f) položaj FAP rešetke (Slika 1). Rezultati DFT proračuna su pokazali da je Ag+ jon jače vezan u Ca1 položaju (-1352,6 kcal/mol) nego u Ca2 položaju (-1249.0 kcal/mol). Ispitivanja antibakterijskih aktivnosti su pokazale da svi uzorci AgFAP imaju biocidni efekat na patogene, [1] dok samo AgFAP3 uzorak (1% Ag+) može poslužiti kao nanomaterijala za zaštitu od zračenja, kao i za pripremu fotoluminiscentnih dozimetara, jer ovaj materijal apsorbuje fotone u celoj oblasti UV zračenja. Rezultati ove studije ukazuju da su srebrom dopirani fluorapatitni 
nanomaterijali pogodni za različite biomedicinske primene, kao antibakterijski 
biomaterijali u ortopediji, stomatologiji i u prečišćavanje otpadnih voda.
AB  - Silver doped fluorapatite (AgFAP) nanopowders were synthesised by 
neutralization method (reaction of dissolving Ag2O in solution of HF and H3PO4 with suspension of Ca(OH)2). [1] AgFAP samples were synthesized with atomic ratios of [Ag/(Ag + Ca)]·100% of 0.001, 0.01 and 1%. The XRD patterns of FAP and Ag+-doped FAP samples (Figure 1) are similar, with the positions of X-ray diffraction peaks in accordance with ASTM data for fluorapatite. FAP as material has a crystal lattice with a hexagonal symmetry space group P63/m, with two structurally different positions of Ca2+ ion (Ca1 (4f) and Ca2 (6h) sites). FTIR and SEM analysis showed that the particles of AgFAP samples are nano-sized and homogenous. Fluorescence of AgFAP is red shifted to the green region compared to fluorescence of FAP nanoparticles (in the violet region of visible part of the spectrum). MCR-ALS analyses showed the formation of two maxima in AgFAP fluorescence spectra (at 420 and 520 nm), as a consequence of Ag+ ions doping at Ca1 (4f) site in the FAP lattice (Figure 1). The results of DFT calculations showed that an Ag+ ion is stronger bonded to Ca1 site (-1352.6 kcal/mol) than to Ca2 site (-1249.0 kcal/mol). Antibacterial studies have shown that all studied AgFAP samples exhibit biocidal effect against pathogens, [1] while only AgFAP3 (1% of Ag+) nanopowder might be used as the radiation protective nanomaterial, as well as for preparation of photoluminescence dosimeters, because this material absorbs photons over all part of the UV radiation spectrum. The result of this study indicates that Ag-doped fluorapatite nanomaterials are promising for different biomedical applications, as antibacterial biomaterials in orthopedics, dentistry and in the purification of waste water.
PB  - Београд : Српско кристалографско друштво
C3  - XXV конференција српског кристалографског друштва
T1  - Ag-dopirani fluorapatitni nanomaterijali dobijeni postupkom neutralizacije
T1  - Ag-doped fluorapatite nanomaterials obtained by neutralization method
EP  - 95
SP  - 94
ER  - 

@conference{
author = "Janjić, Goran and Milojkov, Dušan and Mutavdžić, Dragosav and Živković-Radovanović, Vukosava and Radotić, Ksenija and Radosavljević-Mihajlović, Ana and Stanić, Vojislav",
year = "2018",
abstract = "Srebrom dopirani fluorapatiti (AgFAP) su sintetisani postupkom neutralizacije 
(reakcija Ag2O rastvarenog u HF i H3PO4 sa suspenzijom Ca(OH)2). [1] Sintetisani 
uzorci AgFAP imali su procentnu zastupljenost jona srebra ([Ag/(Ag + Ca)]·100%) od 
0.001, 0.01 i 1%. Rendgenska difraktometrijska (XRD) analiza uzoraka FAP i AgFAP 
pokazala je da su položaji difrakcionih pikova slični i da su u skladu sa ASTM podacima za fluorapatite (Slika 1). FAP kao materijal ima kristalnu rešetku sa heksagonalnom P63/m prostornom grupom, sa dva strukturno različita položaja Ca2+ jona (Ca1 (4f) i Ca2 (6h) položaji). FTIR and SEM analize pokazale su da su čestice AgFAP uzoraka homogene i nano-veličine. Fluorescencija AgFAP uzoraka je pomerena ka zelenom regionu, u odnosu na fluorescenciju FAP nanočestica (u ljubičastom regionu vidljivog dela spektra). MCR ALS analize su pokazale formiranje dva maksimuma u AgFAP fluorescentnom spektru (na 420 i 520 nm), kao posledica dopiranja Ag+ jona u Ca1 (4f) položaj FAP rešetke (Slika 1). Rezultati DFT proračuna su pokazali da je Ag+ jon jače vezan u Ca1 položaju (-1352,6 kcal/mol) nego u Ca2 položaju (-1249.0 kcal/mol). Ispitivanja antibakterijskih aktivnosti su pokazale da svi uzorci AgFAP imaju biocidni efekat na patogene, [1] dok samo AgFAP3 uzorak (1% Ag+) može poslužiti kao nanomaterijala za zaštitu od zračenja, kao i za pripremu fotoluminiscentnih dozimetara, jer ovaj materijal apsorbuje fotone u celoj oblasti UV zračenja. Rezultati ove studije ukazuju da su srebrom dopirani fluorapatitni 
nanomaterijali pogodni za različite biomedicinske primene, kao antibakterijski 
biomaterijali u ortopediji, stomatologiji i u prečišćavanje otpadnih voda., Silver doped fluorapatite (AgFAP) nanopowders were synthesised by 
neutralization method (reaction of dissolving Ag2O in solution of HF and H3PO4 with suspension of Ca(OH)2). [1] AgFAP samples were synthesized with atomic ratios of [Ag/(Ag + Ca)]·100% of 0.001, 0.01 and 1%. The XRD patterns of FAP and Ag+-doped FAP samples (Figure 1) are similar, with the positions of X-ray diffraction peaks in accordance with ASTM data for fluorapatite. FAP as material has a crystal lattice with a hexagonal symmetry space group P63/m, with two structurally different positions of Ca2+ ion (Ca1 (4f) and Ca2 (6h) sites). FTIR and SEM analysis showed that the particles of AgFAP samples are nano-sized and homogenous. Fluorescence of AgFAP is red shifted to the green region compared to fluorescence of FAP nanoparticles (in the violet region of visible part of the spectrum). MCR-ALS analyses showed the formation of two maxima in AgFAP fluorescence spectra (at 420 and 520 nm), as a consequence of Ag+ ions doping at Ca1 (4f) site in the FAP lattice (Figure 1). The results of DFT calculations showed that an Ag+ ion is stronger bonded to Ca1 site (-1352.6 kcal/mol) than to Ca2 site (-1249.0 kcal/mol). Antibacterial studies have shown that all studied AgFAP samples exhibit biocidal effect against pathogens, [1] while only AgFAP3 (1% of Ag+) nanopowder might be used as the radiation protective nanomaterial, as well as for preparation of photoluminescence dosimeters, because this material absorbs photons over all part of the UV radiation spectrum. The result of this study indicates that Ag-doped fluorapatite nanomaterials are promising for different biomedical applications, as antibacterial biomaterials in orthopedics, dentistry and in the purification of waste water.",
publisher = "Београд : Српско кристалографско друштво",
journal = "XXV конференција српског кристалографског друштва",
title = "Ag-dopirani fluorapatitni nanomaterijali dobijeni postupkom neutralizacije, Ag-doped fluorapatite nanomaterials obtained by neutralization method",
pages = "95-94"
}

Janjić, G., Milojkov, D., Mutavdžić, D., Živković-Radovanović, V., Radotić, K., Radosavljević-Mihajlović, A.,& Stanić, V.. (2018). Ag-dopirani fluorapatitni nanomaterijali dobijeni postupkom neutralizacije. in XXV конференција српског кристалографског друштва
Београд : Српско кристалографско друштво., 94-95.

Janjić G, Milojkov D, Mutavdžić D, Živković-Radovanović V, Radotić K, Radosavljević-Mihajlović A, Stanić V. Ag-dopirani fluorapatitni nanomaterijali dobijeni postupkom neutralizacije. in XXV конференција српског кристалографског друштва. 2018;:94-95..

Janjić, Goran, Milojkov, Dušan, Mutavdžić, Dragosav, Živković-Radovanović, Vukosava, Radotić, Ksenija, Radosavljević-Mihajlović, Ana, Stanić, Vojislav, "Ag-dopirani fluorapatitni nanomaterijali dobijeni postupkom neutralizacije" in XXV конференција српског кристалографског друштва (2018):94-95.

TY  - CONF
AU  - Dimović, Slavko
AU  - Stanić, Vojislav
AU  - Šljivić-Ivanović, Marija
AU  - Milojkov, Dušan
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/966
AB  - In addition to the usual methods for food preservation, the use of radiation is
increasingly widespread. The beginnings of radiation use date from the end
of the 19th century, but more intensive application is noticed only after the
Second World War [1]. Most of the research was carried out to determine
the stability and food safety.
Compared to the thermal sterilization, the radiation technique was
developed later, and found less or limited application in the conservation of
foods [2]. It should be noted that electromagnetic radiation is used not only
for the destruction of microorganisms, but also for:
 destruction of insects,
 culinary food processing (microwave ovens),
 slowing down certain biochemical activities (preventing
germination)
 improving certain technological parameters of some foods
(improving the rehydration of dried fruits and vegetables).
The radiation of a short wavelength (approximately 30 nm) is characterized
by high energy, so it has a pronounced mutagenic and lethal effect. This
radiation acts in two ways, either directly with nucleic acids or by forming
the very reactive radicals that can react easily with various organic
compounds, making them unavailable to microorganisms. Free radicals are
ionized molecules - most commonly water molecules.
Besides electromagnetic radiation (X - rays, gamma rays and cosmic rays),
alpha and beta - (corpuscular) radiation can also perform ionization of
molecules. By using ionizing radiation, only a small part of the energy is
transformed into heat. Compared to thermal sterilization, this amounts to
less than 2%, i.e. the temperature of the food does not rise more than 2 ° C,
which is why this treatment is called cold sterilization.
PB  - Belgrade : Vinča institute of nuclear sciences
C3  - 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Food sterilization by ionizing radiation
EP  - 9
SP  - 3
ER  - 

@conference{
author = "Dimović, Slavko and Stanić, Vojislav and Šljivić-Ivanović, Marija and Milojkov, Dušan",
year = "2018",
abstract = "In addition to the usual methods for food preservation, the use of radiation is
increasingly widespread. The beginnings of radiation use date from the end
of the 19th century, but more intensive application is noticed only after the
Second World War [1]. Most of the research was carried out to determine
the stability and food safety.
Compared to the thermal sterilization, the radiation technique was
developed later, and found less or limited application in the conservation of
foods [2]. It should be noted that electromagnetic radiation is used not only
for the destruction of microorganisms, but also for:
 destruction of insects,
 culinary food processing (microwave ovens),
 slowing down certain biochemical activities (preventing
germination)
 improving certain technological parameters of some foods
(improving the rehydration of dried fruits and vegetables).
The radiation of a short wavelength (approximately 30 nm) is characterized
by high energy, so it has a pronounced mutagenic and lethal effect. This
radiation acts in two ways, either directly with nucleic acids or by forming
the very reactive radicals that can react easily with various organic
compounds, making them unavailable to microorganisms. Free radicals are
ionized molecules - most commonly water molecules.
Besides electromagnetic radiation (X - rays, gamma rays and cosmic rays),
alpha and beta - (corpuscular) radiation can also perform ionization of
molecules. By using ionizing radiation, only a small part of the energy is
transformed into heat. Compared to thermal sterilization, this amounts to
less than 2%, i.e. the temperature of the food does not rise more than 2 ° C,
which is why this treatment is called cold sterilization.",
publisher = "Belgrade : Vinča institute of nuclear sciences",
journal = "6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Food sterilization by ionizing radiation",
pages = "9-3"
}

Dimović, S., Stanić, V., Šljivić-Ivanović, M.,& Milojkov, D.. (2018). Food sterilization by ionizing radiation. in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Belgrade : Vinča institute of nuclear sciences., 3-9.

Dimović S, Stanić V, Šljivić-Ivanović M, Milojkov D. Food sterilization by ionizing radiation. in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2018;:3-9..

Dimović, Slavko, Stanić, Vojislav, Šljivić-Ivanović, Marija, Milojkov, Dušan, "Food sterilization by ionizing radiation" in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (2018):3-9.

TY  - CONF
AU  - Stanić, Vojislav
AU  - Kalić, Karolina
AU  - Dimović, Slavko
AU  - Milojkov, Dušan
AU  - Tanasković, Slađana
AU  - Živković-Radovanović, Vukosava
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/971
AB  - The high-density polyethylene/silver-doped fluorapatite composite 
(HDPE/AgFAP) with 1 wt% of AgFAP was produced using a twin screw 
extruder. Characterization studies of XRD and TEM results showed that 
AgFAP particles were drowned and partially dispersed in the polymer. 
Antimicrobial study has demonstrated that composite exhibits antimicrobial 
activity in vitro against the S. aureus.
PB  - Belgrade : Vinča institute of nuclear sciences
C3  - 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Preparation and antimicrobial activity of polyethylene composite with silver-doped fluorapatite
EP  - 139
SP  - 134
ER  - 

@conference{
author = "Stanić, Vojislav and Kalić, Karolina and Dimović, Slavko and Milojkov, Dušan and Tanasković, Slađana and Živković-Radovanović, Vukosava",
year = "2018",
abstract = "The high-density polyethylene/silver-doped fluorapatite composite 
(HDPE/AgFAP) with 1 wt% of AgFAP was produced using a twin screw 
extruder. Characterization studies of XRD and TEM results showed that 
AgFAP particles were drowned and partially dispersed in the polymer. 
Antimicrobial study has demonstrated that composite exhibits antimicrobial 
activity in vitro against the S. aureus.",
publisher = "Belgrade : Vinča institute of nuclear sciences",
journal = "6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Preparation and antimicrobial activity of polyethylene composite with silver-doped fluorapatite",
pages = "139-134"
}

Stanić, V., Kalić, K., Dimović, S., Milojkov, D., Tanasković, S.,& Živković-Radovanović, V.. (2018). Preparation and antimicrobial activity of polyethylene composite with silver-doped fluorapatite. in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Belgrade : Vinča institute of nuclear sciences., 134-139.

Stanić V, Kalić K, Dimović S, Milojkov D, Tanasković S, Živković-Radovanović V. Preparation and antimicrobial activity of polyethylene composite with silver-doped fluorapatite. in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2018;:134-139..

Stanić, Vojislav, Kalić, Karolina, Dimović, Slavko, Milojkov, Dušan, Tanasković, Slađana, Živković-Radovanović, Vukosava, "Preparation and antimicrobial activity of polyethylene composite with silver-doped fluorapatite" in 6th Workshop: Specific methods for food safety and quality, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (2018):134-139.