TY  - CONF
AU  - Milojkov, Dušan
AU  - Marković, Gordana
AU  - Sokić, Miroslav
AU  - Manojlović, Vaso
AU  - Mutavdžić, Dragosav
AU  - Janjić, Goran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7341
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  - Program and the Book of Abstracts, The Eleventh Serbian Ceramic Society Conference Advanced Ceramics and Application, September 18-20, 2023
T1  - Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application
SP  - 38
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_cer_7341
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 = "Program and the Book of Abstracts, The Eleventh Serbian Ceramic Society Conference Advanced Ceramics and Application, September 18-20, 2023",
title = "Luminescence transitions of Pr3+ (4f2) in fluorapatite nanocrystals for  potential biomedical application",
pages = "38-39",
url = "https://hdl.handle.net/21.15107/rcub_cer_7341"
}

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 Program and the Book of Abstracts, The Eleventh Serbian Ceramic Society Conference Advanced Ceramics and Application, September 18-20, 2023
Belgrade : Serbian Ceramic Society., 38-39.
https://hdl.handle.net/21.15107/rcub_cer_7341

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 Program and the Book of Abstracts, The Eleventh Serbian Ceramic Society Conference Advanced Ceramics and Application, September 18-20, 2023. 2023;:38-39.
https://hdl.handle.net/21.15107/rcub_cer_7341 .

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 Program and the Book of Abstracts, The Eleventh Serbian Ceramic Society Conference Advanced Ceramics and Application, September 18-20, 2023 (2023):38-39,
https://hdl.handle.net/21.15107/rcub_cer_7341 .

TY  - CONF
AU  - Marković, Gordana
AU  - Manojlović, Vaso
AU  - Sokić, Miroslav
AU  - Ruzic, Jovana
AU  - Milojkov, Dušan
AU  - Patarić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7362
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
SP  - 154
EP  - 158
UR  - https://hdl.handle.net/21.15107/rcub_cer_7362
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 = "154-158",
url = "https://hdl.handle.net/21.15107/rcub_cer_7362"
}

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.
https://hdl.handle.net/21.15107/rcub_cer_7362

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.
https://hdl.handle.net/21.15107/rcub_cer_7362 .

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,
https://hdl.handle.net/21.15107/rcub_cer_7362 .

TY  - CONF
AU  - Patarić, Aleksandra
AU  - Marković, Gordana
AU  - Đorđević, Nataša G.
AU  - Mihajlović, Slavica
AU  - Mihailović, Marija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6248
AB  - Cobalt–chromium–molybdenum (CoCrMo) alloys are known for medical use due to their biocompatibility, corrosion and  wear resistance. The chemical and phase composition, as well as microstructure of the alloy directly affect the mechanical  properties. In this investigation, CoCrMo alloy samples were obtained by vacuum precise casting. The procedure of  melting and casting process as well as their parameters are given. Molds fabricated of copper, gray iron, steel, ceramics  and graphite were used during the casting process. In this way, the cooling rate influence on the obtained microstructure  was examined. Besides, different casting temperatures (1400°C, 1450°C and 1500°C) were applied for each kind of mold.  After metallographic preparation, the microstructure was examined on the cross section of samples by optical microscopy.  The obtained results show that by increasing the cooling rate, the microstructure of samples become finer and more  homogeneous.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
T1  - Microstructure assessment of Co alloy intended for dentistry
SP  - 221
EP  - 225
UR  - https://hdl.handle.net/21.15107/rcub_cer_6248
ER  - 

@conference{
author = "Patarić, Aleksandra and Marković, Gordana and Đorđević, Nataša G. and Mihajlović, Slavica and Mihailović, Marija",
year = "2023",
abstract = "Cobalt–chromium–molybdenum (CoCrMo) alloys are known for medical use due to their biocompatibility, corrosion and  wear resistance. The chemical and phase composition, as well as microstructure of the alloy directly affect the mechanical  properties. In this investigation, CoCrMo alloy samples were obtained by vacuum precise casting. The procedure of  melting and casting process as well as their parameters are given. Molds fabricated of copper, gray iron, steel, ceramics  and graphite were used during the casting process. In this way, the cooling rate influence on the obtained microstructure  was examined. Besides, different casting temperatures (1400°C, 1450°C and 1500°C) were applied for each kind of mold.  After metallographic preparation, the microstructure was examined on the cross section of samples by optical microscopy.  The obtained results show that by increasing the cooling rate, the microstructure of samples become finer and more  homogeneous.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina",
title = "Microstructure assessment of Co alloy intended for dentistry",
pages = "221-225",
url = "https://hdl.handle.net/21.15107/rcub_cer_6248"
}

Patarić, A., Marković, G., Đorđević, N. G., Mihajlović, S.,& Mihailović, M.. (2023). Microstructure assessment of Co alloy intended for dentistry. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 221-225.
https://hdl.handle.net/21.15107/rcub_cer_6248

Patarić A, Marković G, Đorđević NG, Mihajlović S, Mihailović M. Microstructure assessment of Co alloy intended for dentistry. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina. 2023;:221-225.
https://hdl.handle.net/21.15107/rcub_cer_6248 .

Patarić, Aleksandra, Marković, Gordana, Đorđević, Nataša G., Mihajlović, Slavica, Mihailović, Marija, "Microstructure assessment of Co alloy intended for dentistry" in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina (2023):221-225,
https://hdl.handle.net/21.15107/rcub_cer_6248 .