TY  - CONF
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Labus, Nebojša
AU  - Radović, Marko
AU  - Aškrabić, Sonja
AU  - Dohčević-Mitrović, Zorana
AU  - Stojmenović, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11482
AB  - Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites
SP  - 119
EP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11482
ER  - 

@conference{
author = "Rosić, Milena and Čebela, Maria and Labus, Nebojša and Radović, Marko and Aškrabić, Sonja and Dohčević-Mitrović, Zorana and Stojmenović, Marija",
year = "2023",
abstract = "Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites",
pages = "119-119",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11482"
}

Rosić, M., Čebela, M., Labus, N., Radović, M., Aškrabić, S., Dohčević-Mitrović, Z.,& Stojmenović, M.. (2023). Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 119-119.
https://hdl.handle.net/21.15107/rcub_vinar_11482

Rosić M, Čebela M, Labus N, Radović M, Aškrabić S, Dohčević-Mitrović Z, Stojmenović M. Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:119-119.
https://hdl.handle.net/21.15107/rcub_vinar_11482 .

Rosić, Milena, Čebela, Maria, Labus, Nebojša, Radović, Marko, Aškrabić, Sonja, Dohčević-Mitrović, Zorana, Stojmenović, Marija, "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):119-119,
https://hdl.handle.net/21.15107/rcub_vinar_11482 .

TY  - CONF
AU  - Žakula, Jelena
AU  - Miletić, Mirjana
AU  - Aškrabić, Sonja
AU  - Pejić, Snežana
AU  - Korićanac, Lela
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11008
AB  - The development of new types of nanoparticles has become the focus of biomedical research in recent years. Cerium oxide nanoparticles (CONP) have shown particularly promising results as antitumor agents with a selective effect on tumor and normal cells. On the other side, melanoma and pancreatic carcinoma are among the most aggressive types of cancer with no satisfactory therapy1,2 . Considering that, they represent important model systems for studying new treatment approaches. In this study, the antitumor potential of CONP (size below 10 nm) was studied on human A375 melanoma and PANC-1 pancreatic carcinoma cells. The obtained results indicated that analyzed CONP significantly inhibited clonogenic survival, with the number of colonies reduced on ~30% in A375 cells, while treated PANC-1 cells didn’t form colonies. Growth inhibition was followed by G 2 cell cycle arrest (9% for A375, 17% for PANC-1). Percent of apoptotic PANC-1 cells was 38%, whereas ROS production increased for 78%. CONP significantly reduced metastatic potential through the decrease in cell migration and the increase in cell adhesiveness (up to 30 and 40% for A375 and PANC-1 respectively). These findings emphasize the significant CONP antitumor potential, based on the increase in ROS production, as well as a reduction of A375 and PANC-1 metastatic potential.
PB  - Belgrade : Faculty of Chemistry : Serbian Biochemical Society
C3  - Serbian Biochemical Society : 11th conference - "Amazing Biochemistry" : proceedings ; September 22-23, 2022; Novi Sad, Serbia
T1  - Prooxidative and antimigratory effects of cerium oxide nanoparticles on melanoma and pancreatic cancer cells
SP  - 85
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11008
ER  - 

@conference{
author = "Žakula, Jelena and Miletić, Mirjana and Aškrabić, Sonja and Pejić, Snežana and Korićanac, Lela",
year = "2022",
abstract = "The development of new types of nanoparticles has become the focus of biomedical research in recent years. Cerium oxide nanoparticles (CONP) have shown particularly promising results as antitumor agents with a selective effect on tumor and normal cells. On the other side, melanoma and pancreatic carcinoma are among the most aggressive types of cancer with no satisfactory therapy1,2 . Considering that, they represent important model systems for studying new treatment approaches. In this study, the antitumor potential of CONP (size below 10 nm) was studied on human A375 melanoma and PANC-1 pancreatic carcinoma cells. The obtained results indicated that analyzed CONP significantly inhibited clonogenic survival, with the number of colonies reduced on ~30% in A375 cells, while treated PANC-1 cells didn’t form colonies. Growth inhibition was followed by G 2 cell cycle arrest (9% for A375, 17% for PANC-1). Percent of apoptotic PANC-1 cells was 38%, whereas ROS production increased for 78%. CONP significantly reduced metastatic potential through the decrease in cell migration and the increase in cell adhesiveness (up to 30 and 40% for A375 and PANC-1 respectively). These findings emphasize the significant CONP antitumor potential, based on the increase in ROS production, as well as a reduction of A375 and PANC-1 metastatic potential.",
publisher = "Belgrade : Faculty of Chemistry : Serbian Biochemical Society",
journal = "Serbian Biochemical Society : 11th conference - "Amazing Biochemistry" : proceedings ; September 22-23, 2022; Novi Sad, Serbia",
title = "Prooxidative and antimigratory effects of cerium oxide nanoparticles on melanoma and pancreatic cancer cells",
pages = "85",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11008"
}

Žakula, J., Miletić, M., Aškrabić, S., Pejić, S.,& Korićanac, L.. (2022). Prooxidative and antimigratory effects of cerium oxide nanoparticles on melanoma and pancreatic cancer cells. in Serbian Biochemical Society : 11th conference - "Amazing Biochemistry" : proceedings ; September 22-23, 2022; Novi Sad, Serbia
Belgrade : Faculty of Chemistry : Serbian Biochemical Society., 85.
https://hdl.handle.net/21.15107/rcub_vinar_11008

Žakula J, Miletić M, Aškrabić S, Pejić S, Korićanac L. Prooxidative and antimigratory effects of cerium oxide nanoparticles on melanoma and pancreatic cancer cells. in Serbian Biochemical Society : 11th conference - "Amazing Biochemistry" : proceedings ; September 22-23, 2022; Novi Sad, Serbia. 2022;:85.
https://hdl.handle.net/21.15107/rcub_vinar_11008 .

Žakula, Jelena, Miletić, Mirjana, Aškrabić, Sonja, Pejić, Snežana, Korićanac, Lela, "Prooxidative and antimigratory effects of cerium oxide nanoparticles on melanoma and pancreatic cancer cells" in Serbian Biochemical Society : 11th conference - "Amazing Biochemistry" : proceedings ; September 22-23, 2022; Novi Sad, Serbia (2022):85,
https://hdl.handle.net/21.15107/rcub_vinar_11008 .

TY  - JOUR
AU  - Matović, Branko
AU  - Luković, Jelena M.
AU  - Stojadinović, Bojan
AU  - Aškrabić, Sonja
AU  - Zarubica, Aleksandra R.
AU  - Babić, Biljana M.
AU  - Dohčević-Mitrović, Zorana 
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1905
AB  - Nanosized Mg-doped ceria powders were obtained by self-propagating room temperature reaction without using surfactants or templates. X-ray diffraction analysis and field emission scanning microscopy results showed that the doped samples are solid solutions with fluorite-type structure and spherical morphology. Raman spectra revealed an increase in the amount of oxygen vacancies with the increase of Mg concentration. This increasing results in a narrowing of the bandgap of CeO2. The photocatalytic performances of the Mg-doped ceria solid solutions were evaluated by decomposing an organic dye, crystal violet under UV irradiation. The Mg-doped ceria solid solutions exhibit significantly better photocatalytic activity than the pure CeO2 and commercial TiO2. The higher first rate constant of the Mg-doped samples demonstrated that they are much more efficient than TiO2 and CeO2 under UV light. Mg2+ dopant ions and oxygen vacancies play a significant role in the enhancement of photocatalytic performances of the Mg-doped ceria.
T2  - Processing and Application of Ceramics
T1  - Influence of Mg doping on structural, optical and photocatalytic performances of ceria nanopowders
VL  - 11
IS  - 4
SP  - 304
EP  - 310
DO  - 10.2298/PAC1704304M
ER  - 

@article{
author = "Matović, Branko and Luković, Jelena M. and Stojadinović, Bojan and Aškrabić, Sonja and Zarubica, Aleksandra R. and Babić, Biljana M. and Dohčević-Mitrović, Zorana ",
year = "2017",
abstract = "Nanosized Mg-doped ceria powders were obtained by self-propagating room temperature reaction without using surfactants or templates. X-ray diffraction analysis and field emission scanning microscopy results showed that the doped samples are solid solutions with fluorite-type structure and spherical morphology. Raman spectra revealed an increase in the amount of oxygen vacancies with the increase of Mg concentration. This increasing results in a narrowing of the bandgap of CeO2. The photocatalytic performances of the Mg-doped ceria solid solutions were evaluated by decomposing an organic dye, crystal violet under UV irradiation. The Mg-doped ceria solid solutions exhibit significantly better photocatalytic activity than the pure CeO2 and commercial TiO2. The higher first rate constant of the Mg-doped samples demonstrated that they are much more efficient than TiO2 and CeO2 under UV light. Mg2+ dopant ions and oxygen vacancies play a significant role in the enhancement of photocatalytic performances of the Mg-doped ceria.",
journal = "Processing and Application of Ceramics",
title = "Influence of Mg doping on structural, optical and photocatalytic performances of ceria nanopowders",
volume = "11",
number = "4",
pages = "304-310",
doi = "10.2298/PAC1704304M"
}

Matović, B., Luković, J. M., Stojadinović, B., Aškrabić, S., Zarubica, A. R., Babić, B. M.,& Dohčević-Mitrović, Z.. (2017). Influence of Mg doping on structural, optical and photocatalytic performances of ceria nanopowders. in Processing and Application of Ceramics, 11(4), 304-310.
https://doi.org/10.2298/PAC1704304M

Matović B, Luković JM, Stojadinović B, Aškrabić S, Zarubica AR, Babić BM, Dohčević-Mitrović Z. Influence of Mg doping on structural, optical and photocatalytic performances of ceria nanopowders. in Processing and Application of Ceramics. 2017;11(4):304-310.
doi:10.2298/PAC1704304M .

Matović, Branko, Luković, Jelena M., Stojadinović, Bojan, Aškrabić, Sonja, Zarubica, Aleksandra R., Babić, Biljana M., Dohčević-Mitrović, Zorana , "Influence of Mg doping on structural, optical and photocatalytic performances of ceria nanopowders" in Processing and Application of Ceramics, 11, no. 4 (2017):304-310,
https://doi.org/10.2298/PAC1704304M . .

TY  - JOUR
AU  - Dohčević-Mitrović, Zorana 
AU  - Stojadinovic, Stevan
AU  - Lozzi, Luca
AU  - Aškrabić, Sonja
AU  - Rosić, Milena
AU  - Tomić, Nataša
AU  - Paunović, Novica M.
AU  - Lazović, Saša
AU  - Nikolić, Marko G.
AU  - Santucci, Sandro
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1234
AB  - WO3/TiO2 and TiO2 coatings were prepared on titania substrates using facile and cost-effective plasma electrolytic oxidation process. The coatings were characterized by X-ray diffraction, scanning electron microscopy, Raman, UV vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. With increasing duration of PEO process, the monoclinic WO3 phase became dominant and new monoclinic WO2.95 phase appeared. The optical absorption edge in the WO3/TiO2 samples, enriched with WO3/WO2.96 phase, was shifted to the visible region. The photocatalytic efficiency of WO3/TiO2 and pure TiO2 samples was evaluated by performing the photodegradation experiments in an aqueous solution of Rhodamine 6G and Mordant Blue 9 under the visible and UV light. The WO3/TiO2 catalysts are much more efficient than pure TiO2 under visible light and slightly better under UV light. The improvement of photocatalytic activity in the visible region is attributed to better light absorption, higher adsorption affinity and increased charge separation efficiency. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties
VL  - 83
SP  - 217
EP  - 224
DO  - 10.1016/j.materresbull.2016.06.011
ER  - 

@article{
author = "Dohčević-Mitrović, Zorana  and Stojadinovic, Stevan and Lozzi, Luca and Aškrabić, Sonja and Rosić, Milena and Tomić, Nataša and Paunović, Novica M. and Lazović, Saša and Nikolić, Marko G. and Santucci, Sandro",
year = "2016",
abstract = "WO3/TiO2 and TiO2 coatings were prepared on titania substrates using facile and cost-effective plasma electrolytic oxidation process. The coatings were characterized by X-ray diffraction, scanning electron microscopy, Raman, UV vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. With increasing duration of PEO process, the monoclinic WO3 phase became dominant and new monoclinic WO2.95 phase appeared. The optical absorption edge in the WO3/TiO2 samples, enriched with WO3/WO2.96 phase, was shifted to the visible region. The photocatalytic efficiency of WO3/TiO2 and pure TiO2 samples was evaluated by performing the photodegradation experiments in an aqueous solution of Rhodamine 6G and Mordant Blue 9 under the visible and UV light. The WO3/TiO2 catalysts are much more efficient than pure TiO2 under visible light and slightly better under UV light. The improvement of photocatalytic activity in the visible region is attributed to better light absorption, higher adsorption affinity and increased charge separation efficiency. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties",
volume = "83",
pages = "217-224",
doi = "10.1016/j.materresbull.2016.06.011"
}

Dohčević-Mitrović, Z., Stojadinovic, S., Lozzi, L., Aškrabić, S., Rosić, M., Tomić, N., Paunović, N. M., Lazović, S., Nikolić, M. G.,& Santucci, S.. (2016). WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties. in Materials Research Bulletin, 83, 217-224.
https://doi.org/10.1016/j.materresbull.2016.06.011

Dohčević-Mitrović Z, Stojadinovic S, Lozzi L, Aškrabić S, Rosić M, Tomić N, Paunović NM, Lazović S, Nikolić MG, Santucci S. WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties. in Materials Research Bulletin. 2016;83:217-224.
doi:10.1016/j.materresbull.2016.06.011 .

Dohčević-Mitrović, Zorana , Stojadinovic, Stevan, Lozzi, Luca, Aškrabić, Sonja, Rosić, Milena, Tomić, Nataša, Paunović, Novica M., Lazović, Saša, Nikolić, Marko G., Santucci, Sandro, "WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties" in Materials Research Bulletin, 83 (2016):217-224,
https://doi.org/10.1016/j.materresbull.2016.06.011 . .

TY  - JOUR
AU  - Tomić, Nataša
AU  - Dohčević-Mitrović, Zorana
AU  - Paunović, Novica M.
AU  - Mijin, Dušan Ž.
AU  - Radić, Nenad D.
AU  - Grbic, Bosko V.
AU  - Aškrabić, Sonja
AU  - Babić, Biljana M.
AU  - Bajuk-Bogdanović, Danica V.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9685
AB  - Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.
T2  - Langmuir
T1  - Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes
VL  - 30
IS  - 39
SP  - 11582
EP  - 11590
DO  - 10.1021/la502969w
ER  - 

@article{
author = "Tomić, Nataša and Dohčević-Mitrović, Zorana and Paunović, Novica M. and Mijin, Dušan Ž. and Radić, Nenad D. and Grbic, Bosko V. and Aškrabić, Sonja and Babić, Biljana M. and Bajuk-Bogdanović, Danica V.",
year = "2014",
abstract = "Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.",
journal = "Langmuir",
title = "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes",
volume = "30",
number = "39",
pages = "11582-11590",
doi = "10.1021/la502969w"
}

Tomić, N., Dohčević-Mitrović, Z., Paunović, N. M., Mijin, D. Ž., Radić, N. D., Grbic, B. V., Aškrabić, S., Babić, B. M.,& Bajuk-Bogdanović, D. V.. (2014). Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir, 30(39), 11582-11590.
https://doi.org/10.1021/la502969w

Tomić N, Dohčević-Mitrović Z, Paunović NM, Mijin DŽ, Radić ND, Grbic BV, Aškrabić S, Babić BM, Bajuk-Bogdanović DV. Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir. 2014;30(39):11582-11590.
doi:10.1021/la502969w .

Tomić, Nataša, Dohčević-Mitrović, Zorana, Paunović, Novica M., Mijin, Dušan Ž., Radić, Nenad D., Grbic, Bosko V., Aškrabić, Sonja, Babić, Biljana M., Bajuk-Bogdanović, Danica V., "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes" in Langmuir, 30, no. 39 (2014):11582-11590,
https://doi.org/10.1021/la502969w . .

TY  - JOUR
AU  - Zelic, Ksenija
AU  - Milovanović, Petar
AU  - Rakočević, Zlatko Lj.
AU  - Aškrabić, Sonja
AU  - Potočnik, Jelena
AU  - Popovic, Miroslav
AU  - Đurić, Marija
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5962
AB  - Objective. Increased tooth fragility after devitalization is commonly observed but there is no definite mechanistic explanation for such phenomenon. Therefore, it is important to analyze more profoundly structural and compositional properties of this altered form of dentin. The present study investigates the differences between normal and devitalized dentin using advanced techniques. Methods. Atomic force microscopic imaging (AFM), energy dispersive X-ray analysis (EDX) and micro-Raman spectroscopy were performed on 16 dentin specimens, eight vital and eight that underwent root-canal treatment at least two years before extraction and had no infection in root canals before or after devitalization. Results. The mean size of mineral crystals showed by AFM was larger in devitalized than in healthy dentin in the same age category. AFM phase shifts in devitalized cases revealed altered mechanical characteristics and suggested differences in composition of material between devitalized teeth and healthy controls. No significant difference in Ca/P ratio between vital and devitalized teeth was found using EDX. However, micro-Raman analyses showed that in devitalized teeth, apart from hydroxyapatite, dentin contained significant amounts of apatite phases with lower calcium content: octacalcium phosphate, dicalcium phosphate dihydrate and tricalcium phosphate. Significance. Differences between vital and devitalized dentin bring new insights into the basis of devitalized tooth fragility. Larger mineral crystals could account for decreased mechanical strength in devitalized teeth. Moreover, calcium-phosphate phases with lower Ca content have lower material strength, and the presence of these phases in devitalized teeth may explain their increased fragility. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
T2  - Dental Materials
T1  - Nano-structural and compositional basis of devitalized tooth fragility
VL  - 30
IS  - 5
SP  - 476
EP  - 486
DO  - 10.1016/j.dental.2014.01.014
ER  - 

@article{
author = "Zelic, Ksenija and Milovanović, Petar and Rakočević, Zlatko Lj. and Aškrabić, Sonja and Potočnik, Jelena and Popovic, Miroslav and Đurić, Marija",
year = "2014",
abstract = "Objective. Increased tooth fragility after devitalization is commonly observed but there is no definite mechanistic explanation for such phenomenon. Therefore, it is important to analyze more profoundly structural and compositional properties of this altered form of dentin. The present study investigates the differences between normal and devitalized dentin using advanced techniques. Methods. Atomic force microscopic imaging (AFM), energy dispersive X-ray analysis (EDX) and micro-Raman spectroscopy were performed on 16 dentin specimens, eight vital and eight that underwent root-canal treatment at least two years before extraction and had no infection in root canals before or after devitalization. Results. The mean size of mineral crystals showed by AFM was larger in devitalized than in healthy dentin in the same age category. AFM phase shifts in devitalized cases revealed altered mechanical characteristics and suggested differences in composition of material between devitalized teeth and healthy controls. No significant difference in Ca/P ratio between vital and devitalized teeth was found using EDX. However, micro-Raman analyses showed that in devitalized teeth, apart from hydroxyapatite, dentin contained significant amounts of apatite phases with lower calcium content: octacalcium phosphate, dicalcium phosphate dihydrate and tricalcium phosphate. Significance. Differences between vital and devitalized dentin bring new insights into the basis of devitalized tooth fragility. Larger mineral crystals could account for decreased mechanical strength in devitalized teeth. Moreover, calcium-phosphate phases with lower Ca content have lower material strength, and the presence of these phases in devitalized teeth may explain their increased fragility. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.",
journal = "Dental Materials",
title = "Nano-structural and compositional basis of devitalized tooth fragility",
volume = "30",
number = "5",
pages = "476-486",
doi = "10.1016/j.dental.2014.01.014"
}

Zelic, K., Milovanović, P., Rakočević, Z. Lj., Aškrabić, S., Potočnik, J., Popovic, M.,& Đurić, M.. (2014). Nano-structural and compositional basis of devitalized tooth fragility. in Dental Materials, 30(5), 476-486.
https://doi.org/10.1016/j.dental.2014.01.014

Zelic K, Milovanović P, Rakočević ZL, Aškrabić S, Potočnik J, Popovic M, Đurić M. Nano-structural and compositional basis of devitalized tooth fragility. in Dental Materials. 2014;30(5):476-486.
doi:10.1016/j.dental.2014.01.014 .

Zelic, Ksenija, Milovanović, Petar, Rakočević, Zlatko Lj., Aškrabić, Sonja, Potočnik, Jelena, Popovic, Miroslav, Đurić, Marija, "Nano-structural and compositional basis of devitalized tooth fragility" in Dental Materials, 30, no. 5 (2014):476-486,
https://doi.org/10.1016/j.dental.2014.01.014 . .

TY  - JOUR
AU  - Tomić, Nataša
AU  - Dohčević-Mitrović, Zorana
AU  - Paunović, Novica M.
AU  - Mijin, Dušan Ž.
AU  - Radić, Nenad D.
AU  - Grbic, Bosko V.
AU  - Aškrabić, Sonja
AU  - Babić, Biljana M.
AU  - Bajuk-Bogdanović, Danica V.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/156
AB  - Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.
T2  - Langmuir
T1  - Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes
VL  - 30
IS  - 39
SP  - 11582
EP  - 11590
DO  - 10.1021/la502969w
ER  - 

@article{
author = "Tomić, Nataša and Dohčević-Mitrović, Zorana and Paunović, Novica M. and Mijin, Dušan Ž. and Radić, Nenad D. and Grbic, Bosko V. and Aškrabić, Sonja and Babić, Biljana M. and Bajuk-Bogdanović, Danica V.",
year = "2014",
abstract = "Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.",
journal = "Langmuir",
title = "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes",
volume = "30",
number = "39",
pages = "11582-11590",
doi = "10.1021/la502969w"
}

Tomić, N., Dohčević-Mitrović, Z., Paunović, N. M., Mijin, D. Ž., Radić, N. D., Grbic, B. V., Aškrabić, S., Babić, B. M.,& Bajuk-Bogdanović, D. V.. (2014). Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir, 30(39), 11582-11590.
https://doi.org/10.1021/la502969w

Tomić N, Dohčević-Mitrović Z, Paunović NM, Mijin DŽ, Radić ND, Grbic BV, Aškrabić S, Babić BM, Bajuk-Bogdanović DV. Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir. 2014;30(39):11582-11590.
doi:10.1021/la502969w .

Tomić, Nataša, Dohčević-Mitrović, Zorana, Paunović, Novica M., Mijin, Dušan Ž., Radić, Nenad D., Grbic, Bosko V., Aškrabić, Sonja, Babić, Biljana M., Bajuk-Bogdanović, Danica V., "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes" in Langmuir, 30, no. 39 (2014):11582-11590,
https://doi.org/10.1021/la502969w . .

TY  - JOUR
AU  - Paunović, Novica M.
AU  - Dohčević-Mitrović, Zorana 
AU  - Scurtu, Rares
AU  - Aškrabić, Sonja
AU  - Prekajski, Marija D.
AU  - Matović, Branko
AU  - Popović, Zoran V.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4992
AB  - Ce1-xPrxO2-delta (0 LT = x LT = 0.4) nanocrystals were synthesized by self-propagating method and thoroughly characterized using X-ray diffraction, Raman and X-ray photoelectron spectroscopy and magnetic measurements. Undoped CeO2 nanocrystals exhibited intrinsic ferromagnetism at room temperature. Despite the increased concentration of oxygen vacancies in doped samples, our results showed that ferromagnetic ordering rapidly degrades with Pr doping. The suppression of ferromagnetism can be explained in terms of the different dopant valence state, the different nature of the vacancies formed in Pr-doped samples and their ability/disability to establish the ferromagnetic ordering.
T2  - Nanoscale
T1  - Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals
VL  - 4
IS  - 17
SP  - 5469
EP  - 5476
DO  - 10.1039/c2nr30799e
ER  - 

@article{
author = "Paunović, Novica M. and Dohčević-Mitrović, Zorana  and Scurtu, Rares and Aškrabić, Sonja and Prekajski, Marija D. and Matović, Branko and Popović, Zoran V.",
year = "2012",
abstract = "Ce1-xPrxO2-delta (0 LT = x LT = 0.4) nanocrystals were synthesized by self-propagating method and thoroughly characterized using X-ray diffraction, Raman and X-ray photoelectron spectroscopy and magnetic measurements. Undoped CeO2 nanocrystals exhibited intrinsic ferromagnetism at room temperature. Despite the increased concentration of oxygen vacancies in doped samples, our results showed that ferromagnetic ordering rapidly degrades with Pr doping. The suppression of ferromagnetism can be explained in terms of the different dopant valence state, the different nature of the vacancies formed in Pr-doped samples and their ability/disability to establish the ferromagnetic ordering.",
journal = "Nanoscale",
title = "Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals",
volume = "4",
number = "17",
pages = "5469-5476",
doi = "10.1039/c2nr30799e"
}

Paunović, N. M., Dohčević-Mitrović, Z., Scurtu, R., Aškrabić, S., Prekajski, M. D., Matović, B.,& Popović, Z. V.. (2012). Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals. in Nanoscale, 4(17), 5469-5476.
https://doi.org/10.1039/c2nr30799e

Paunović NM, Dohčević-Mitrović Z, Scurtu R, Aškrabić S, Prekajski MD, Matović B, Popović ZV. Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals. in Nanoscale. 2012;4(17):5469-5476.
doi:10.1039/c2nr30799e .

Paunović, Novica M., Dohčević-Mitrović, Zorana , Scurtu, Rares, Aškrabić, Sonja, Prekajski, Marija D., Matović, Branko, Popović, Zoran V., "Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals" in Nanoscale, 4, no. 17 (2012):5469-5476,
https://doi.org/10.1039/c2nr30799e . .