Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča)

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Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) (en)
Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije, Ugovor br. 451-03-68/2020-14/200017 (Univerzitet u Beogradu, Institut za nuklearne nauke Vinča, Beograd-Vinča) (sr_RS)
Министарство просвете, науке и технолошког развоја Републике Србије, Уговор бр. 451-03-68/2020-14/200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (sr)
Authors

Publications

Low optical losses in plasmonic TiN thin films implanted with silver and gold

Novaković, Mirjana M.; Popović, Maja; Noga, Pavol; Vana, Dušan; Ronning, Carsten

(2022)

TY  - JOUR
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Noga, Pavol
AU  - Vana, Dušan
AU  - Ronning, Carsten
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10106
AB  - Titanium-nitride (TiN) is known as a very promising plasmonic material, which offers many advantages compared to conventional metals commonly used in practical devices. Despite many improvements, TiN still suffers from high losses in the near-infrared (NIR) spectral region, making it less suitable for real-life applications. In this study, we have investigated the effects of pure silver implanted as well as silver/gold co-implanted TiN thin films on their optical properties, which we analyzed by spectroscopic ellipsometry. We demonstrate that the presence of silver and gold drastically changes both the real and imaginary part of the dielectric function. The implanted films exhibit optical losses several times lower compared to as-deposited TiN. The changes are in particular more pronounced for the samples with Au/Ag co-implantations, reaching nearly the same optical values as those of pure gold and being only slightly larger than that of silver. Thus, such an optical tuning of TiN opens new horizons and provide high potential for its implementation into plasmonic applications.
T2  - Optical Materials
T1  - Low optical losses in plasmonic TiN thin films implanted with silver and gold
VL  - 123
SP  - 111936
DO  - 10.1016/j.optmat.2021.111936
ER  - 
@article{
author = "Novaković, Mirjana M. and Popović, Maja and Noga, Pavol and Vana, Dušan and Ronning, Carsten",
year = "2022",
abstract = "Titanium-nitride (TiN) is known as a very promising plasmonic material, which offers many advantages compared to conventional metals commonly used in practical devices. Despite many improvements, TiN still suffers from high losses in the near-infrared (NIR) spectral region, making it less suitable for real-life applications. In this study, we have investigated the effects of pure silver implanted as well as silver/gold co-implanted TiN thin films on their optical properties, which we analyzed by spectroscopic ellipsometry. We demonstrate that the presence of silver and gold drastically changes both the real and imaginary part of the dielectric function. The implanted films exhibit optical losses several times lower compared to as-deposited TiN. The changes are in particular more pronounced for the samples with Au/Ag co-implantations, reaching nearly the same optical values as those of pure gold and being only slightly larger than that of silver. Thus, such an optical tuning of TiN opens new horizons and provide high potential for its implementation into plasmonic applications.",
journal = "Optical Materials",
title = "Low optical losses in plasmonic TiN thin films implanted with silver and gold",
volume = "123",
pages = "111936",
doi = "10.1016/j.optmat.2021.111936"
}
Novaković, M. M., Popović, M., Noga, P., Vana, D.,& Ronning, C.. (2022). Low optical losses in plasmonic TiN thin films implanted with silver and gold. in Optical Materials, 123, 111936.
https://doi.org/10.1016/j.optmat.2021.111936
Novaković MM, Popović M, Noga P, Vana D, Ronning C. Low optical losses in plasmonic TiN thin films implanted with silver and gold. in Optical Materials. 2022;123:111936.
doi:10.1016/j.optmat.2021.111936 .
Novaković, Mirjana M., Popović, Maja, Noga, Pavol, Vana, Dušan, Ronning, Carsten, "Low optical losses in plasmonic TiN thin films implanted with silver and gold" in Optical Materials, 123 (2022):111936,
https://doi.org/10.1016/j.optmat.2021.111936 . .

Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour

Krstić, Marko Z.; Rogić Miladinović, Z.; Barudžija, Tanja S.; Mladenović, Aleksandar R.; Suljovrujić, Edin H.

(2022)

TY  - JOUR
AU  - Krstić, Marko Z.
AU  - Rogić Miladinović, Z.
AU  - Barudžija, Tanja S.
AU  - Mladenović, Aleksandar R.
AU  - Suljovrujić, Edin H.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10097
AB  - Di(meth)acrylate (D(M)A) systems with pendant oligo(ethylene glycol) (OEG) chains are promising biomedical candidates. Homopolymeric P(OEG)D(M)A hydrogels have significant thermoresponsiveness demonstrated mainly at elevated temperatures which makes this class of materials unsuitable for bio-applications. Copolymerisation with less hydrophilic 2-hydroxyethyl methacrylate (HEMA) was performed in an effort to shift volume phase transition (VPT) closer to physiological temperatures and to widen their application as thermoresponsive materials. Various monomer-solvent mixtures, consisting of different mole ratios of OEGDMA and HEMA monomers (100/0, 50/50, 27.5/72.5, and 12.5/87.5) and water/ethanol as solvent, were exposed to gamma radiation up to 6, 12, 25, and 50 kGy. Furthermore, in an attempt to obtain multi- (thermo- and pH-) responsive hydrogels for biomedical applications new P(OEGDMA/HEMA/IA) terpolymers containing a small share (2.5, and 5 wt%) of itaconic acid (IA) were synthesised. The successful fabrication of the hydrogels was confirmed by gel measurements and FTIR spectroscopy. Swelling measurements indicated that obtained networks possessed tuneable thermal behaviour and swelling properties which could be significantly altered by hydrogel composition. The porous architecture was investigated using SEM, confirming swelling results. Cytotoxicity revealed relatively high cell viability for all hydrogels, indicating satisfactory in vitro biocompatibility. Therefore, new OEGDMA based hydrogels showed potential for biomedical applications.
T2  - Reactive and Functional Polymers
T1  - Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour
VL  - 170
SP  - 105140
DO  - 10.1016/j.reactfunctpolym.2021.105140
ER  - 
@article{
author = "Krstić, Marko Z. and Rogić Miladinović, Z. and Barudžija, Tanja S. and Mladenović, Aleksandar R. and Suljovrujić, Edin H.",
year = "2022",
abstract = "Di(meth)acrylate (D(M)A) systems with pendant oligo(ethylene glycol) (OEG) chains are promising biomedical candidates. Homopolymeric P(OEG)D(M)A hydrogels have significant thermoresponsiveness demonstrated mainly at elevated temperatures which makes this class of materials unsuitable for bio-applications. Copolymerisation with less hydrophilic 2-hydroxyethyl methacrylate (HEMA) was performed in an effort to shift volume phase transition (VPT) closer to physiological temperatures and to widen their application as thermoresponsive materials. Various monomer-solvent mixtures, consisting of different mole ratios of OEGDMA and HEMA monomers (100/0, 50/50, 27.5/72.5, and 12.5/87.5) and water/ethanol as solvent, were exposed to gamma radiation up to 6, 12, 25, and 50 kGy. Furthermore, in an attempt to obtain multi- (thermo- and pH-) responsive hydrogels for biomedical applications new P(OEGDMA/HEMA/IA) terpolymers containing a small share (2.5, and 5 wt%) of itaconic acid (IA) were synthesised. The successful fabrication of the hydrogels was confirmed by gel measurements and FTIR spectroscopy. Swelling measurements indicated that obtained networks possessed tuneable thermal behaviour and swelling properties which could be significantly altered by hydrogel composition. The porous architecture was investigated using SEM, confirming swelling results. Cytotoxicity revealed relatively high cell viability for all hydrogels, indicating satisfactory in vitro biocompatibility. Therefore, new OEGDMA based hydrogels showed potential for biomedical applications.",
journal = "Reactive and Functional Polymers",
title = "Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour",
volume = "170",
pages = "105140",
doi = "10.1016/j.reactfunctpolym.2021.105140"
}
Krstić, M. Z., Rogić Miladinović, Z., Barudžija, T. S., Mladenović, A. R.,& Suljovrujić, E. H.. (2022). Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour. in Reactive and Functional Polymers, 170, 105140.
https://doi.org/10.1016/j.reactfunctpolym.2021.105140
Krstić MZ, Rogić Miladinović Z, Barudžija TS, Mladenović AR, Suljovrujić EH. Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour. in Reactive and Functional Polymers. 2022;170:105140.
doi:10.1016/j.reactfunctpolym.2021.105140 .
Krstić, Marko Z., Rogić Miladinović, Z., Barudžija, Tanja S., Mladenović, Aleksandar R., Suljovrujić, Edin H., "Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour" in Reactive and Functional Polymers, 170 (2022):105140,
https://doi.org/10.1016/j.reactfunctpolym.2021.105140 . .

A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash

Vukanac, Ivana; Šešlak, Bojan Ž.; Kandić, Aleksandar; Čeliković, Igor T.; Mladenović-Nikolić, Nataša; Milanović, Tamara; Obradović, Zorica; Đurašević, Mirjana

(2022)

TY  - JOUR
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan Ž.
AU  - Kandić, Aleksandar
AU  - Čeliković, Igor T.
AU  - Mladenović-Nikolić, Nataša
AU  - Milanović, Tamara
AU  - Obradović, Zorica
AU  - Đurašević, Mirjana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10096
AB  - In order to compare alpha-particle and gamma-ray spectrometry, the activity concentrations of 235U, 238U and 226Ra in samples of coal, slag and fly-ash from the thermal power plant “Nikola Tesla A”, Serbia, were determined by these two methods. Methods were compared and discussed from the point of view of its precision, difficulty to apply and complexity. Gamma-ray spectrometry was performed with HPGe (High Purity Germanium) spectrometer, while alpha activity was measured by PIPS (Passivated Implanted Planar Silicon) detector. For the alpha-particle spectrometry, the chemical procedures applied were chromatographic resin extraction for uranium isotopes and micro-coprecipitation for 226Ra. Thin alpha sources were prepared by electrodeposition and filtration through polypropylene membrane filter for uranium determination, while filtration technique was performed for radium sources. For the evaluation of the statistical difference between individual measurement results obtained by application of two methods Z - test was used. In order to evaluate the difference between two methods used, paired samples t-test and F-test were applied. Results show that there is no statistical difference between two methods used and that gamma-ray spectrometry is a valid alternative to time consuming alpha spectrometry.
T2  - Radiation Physics and Chemistry
T1  - A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash
VL  - 193
SP  - 109933
DO  - 10.1016/j.radphyschem.2021.109933
ER  - 
@article{
author = "Vukanac, Ivana and Šešlak, Bojan Ž. and Kandić, Aleksandar and Čeliković, Igor T. and Mladenović-Nikolić, Nataša and Milanović, Tamara and Obradović, Zorica and Đurašević, Mirjana",
year = "2022",
abstract = "In order to compare alpha-particle and gamma-ray spectrometry, the activity concentrations of 235U, 238U and 226Ra in samples of coal, slag and fly-ash from the thermal power plant “Nikola Tesla A”, Serbia, were determined by these two methods. Methods were compared and discussed from the point of view of its precision, difficulty to apply and complexity. Gamma-ray spectrometry was performed with HPGe (High Purity Germanium) spectrometer, while alpha activity was measured by PIPS (Passivated Implanted Planar Silicon) detector. For the alpha-particle spectrometry, the chemical procedures applied were chromatographic resin extraction for uranium isotopes and micro-coprecipitation for 226Ra. Thin alpha sources were prepared by electrodeposition and filtration through polypropylene membrane filter for uranium determination, while filtration technique was performed for radium sources. For the evaluation of the statistical difference between individual measurement results obtained by application of two methods Z - test was used. In order to evaluate the difference between two methods used, paired samples t-test and F-test were applied. Results show that there is no statistical difference between two methods used and that gamma-ray spectrometry is a valid alternative to time consuming alpha spectrometry.",
journal = "Radiation Physics and Chemistry",
title = "A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash",
volume = "193",
pages = "109933",
doi = "10.1016/j.radphyschem.2021.109933"
}
Vukanac, I., Šešlak, B. Ž., Kandić, A., Čeliković, I. T., Mladenović-Nikolić, N., Milanović, T., Obradović, Z.,& Đurašević, M.. (2022). A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash. in Radiation Physics and Chemistry, 193, 109933.
https://doi.org/10.1016/j.radphyschem.2021.109933
Vukanac I, Šešlak BŽ, Kandić A, Čeliković IT, Mladenović-Nikolić N, Milanović T, Obradović Z, Đurašević M. A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash. in Radiation Physics and Chemistry. 2022;193:109933.
doi:10.1016/j.radphyschem.2021.109933 .
Vukanac, Ivana, Šešlak, Bojan Ž., Kandić, Aleksandar, Čeliković, Igor T., Mladenović-Nikolić, Nataša, Milanović, Tamara, Obradović, Zorica, Đurašević, Mirjana, "A comparison of alpha-particle and gamma-ray spectrometry methods for determination of 235U, 238U and 226Ra activity concentration in samples of coal, slag and fly-ash" in Radiation Physics and Chemistry, 193 (2022):109933,
https://doi.org/10.1016/j.radphyschem.2021.109933 . .

Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation

Mišović, Aleksandra; Bajuk-Bogdanović, Danica V.; Kepić, Dejan; Pavlović, Vladimir B.; Huskić, Miroslav; Hasheminejad, Navid; Vuye, Cedric; Zorić, Nemanja; Jovanović, Svetlana

(2022)

TY  - JOUR
AU  - Mišović, Aleksandra
AU  - Bajuk-Bogdanović, Danica V.
AU  - Kepić, Dejan
AU  - Pavlović, Vladimir B.
AU  - Huskić, Miroslav
AU  - Hasheminejad, Navid
AU  - Vuye, Cedric
AU  - Zorić, Nemanja
AU  - Jovanović, Svetlana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10078
AB  - The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.
T2  - Synthetic Metals
T1  - Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation
VL  - 283
SP  - 116980
DO  - 10.1016/j.synthmet.2021.116980
ER  - 
@article{
author = "Mišović, Aleksandra and Bajuk-Bogdanović, Danica V. and Kepić, Dejan and Pavlović, Vladimir B. and Huskić, Miroslav and Hasheminejad, Navid and Vuye, Cedric and Zorić, Nemanja and Jovanović, Svetlana",
year = "2022",
abstract = "The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.",
journal = "Synthetic Metals",
title = "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation",
volume = "283",
pages = "116980",
doi = "10.1016/j.synthmet.2021.116980"
}
Mišović, A., Bajuk-Bogdanović, D. V., Kepić, D., Pavlović, V. B., Huskić, M., Hasheminejad, N., Vuye, C., Zorić, N.,& Jovanović, S.. (2022). Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals, 283, 116980.
https://doi.org/10.1016/j.synthmet.2021.116980
Mišović A, Bajuk-Bogdanović DV, Kepić D, Pavlović VB, Huskić M, Hasheminejad N, Vuye C, Zorić N, Jovanović S. Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals. 2022;283:116980.
doi:10.1016/j.synthmet.2021.116980 .
Mišović, Aleksandra, Bajuk-Bogdanović, Danica V., Kepić, Dejan, Pavlović, Vladimir B., Huskić, Miroslav, Hasheminejad, Navid, Vuye, Cedric, Zorić, Nemanja, Jovanović, Svetlana, "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation" in Synthetic Metals, 283 (2022):116980,
https://doi.org/10.1016/j.synthmet.2021.116980 . .

Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows

Mirkov, Nikola S.; Ouyahia, Seif Eddine; Lahlou, Sara; Pezo, Milada L.; Jovanović, Rastko D.

(2022)

TY  - CHAP
AU  - Mirkov, Nikola S.
AU  - Ouyahia, Seif Eddine
AU  - Lahlou, Sara
AU  - Pezo, Milada L.
AU  - Jovanović, Rastko D.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10065
AB  - In the present paper, we discuss implementation details of a free and open-source numerical solver based on the finite volume method for numerical simulation of viscoplastic non-Newtonian fluids. In addition to the fact that they are involved in many industrial applications, both their physical properties and their rheological behavior make them challenging for numerical simulation. Viscoplastic fluids are known to behave as solid unless the shear stress reaches a critical level, known as yield-stress, beyond which they behave as liquid. In most cases, both yielded and unyielded regions coexist in the fluid domain. In mathematical model of viscoplastic fluid, the constitutive equation is a non-differentiable function. This is often overcome by using the approximate constitutive equation that has a regularized form, e.g. the Papanastasiou regularization model. Using the same approach, we assess the influence of regularization parameters on simulation convergence and results accuracy. In this study, we give implementation details of viscoplastic fluid models in freeCappuccino open-source Computational Fluid Dynamics code. Moreover, we perform validation on several well known benchmark cases and compare proposed approach with those existing in published literature. We also perform a parametric analysis and show the effect of Reynolds and Bingham numbers on the extent of the yielded regions. Conclusions of the study have relevance in practical application of computational fluid dynamics to viscoplastic fluids in particular and to non-Newtonian fluids in general. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
T2  - Lecture Notes in Networks and Systems
T1  - Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows
VL  - 323
SP  - 223
EP  - 238
DO  - 10.1007/978-3-030-86009-7_12
ER  - 
@inbook{
author = "Mirkov, Nikola S. and Ouyahia, Seif Eddine and Lahlou, Sara and Pezo, Milada L. and Jovanović, Rastko D.",
year = "2022",
abstract = "In the present paper, we discuss implementation details of a free and open-source numerical solver based on the finite volume method for numerical simulation of viscoplastic non-Newtonian fluids. In addition to the fact that they are involved in many industrial applications, both their physical properties and their rheological behavior make them challenging for numerical simulation. Viscoplastic fluids are known to behave as solid unless the shear stress reaches a critical level, known as yield-stress, beyond which they behave as liquid. In most cases, both yielded and unyielded regions coexist in the fluid domain. In mathematical model of viscoplastic fluid, the constitutive equation is a non-differentiable function. This is often overcome by using the approximate constitutive equation that has a regularized form, e.g. the Papanastasiou regularization model. Using the same approach, we assess the influence of regularization parameters on simulation convergence and results accuracy. In this study, we give implementation details of viscoplastic fluid models in freeCappuccino open-source Computational Fluid Dynamics code. Moreover, we perform validation on several well known benchmark cases and compare proposed approach with those existing in published literature. We also perform a parametric analysis and show the effect of Reynolds and Bingham numbers on the extent of the yielded regions. Conclusions of the study have relevance in practical application of computational fluid dynamics to viscoplastic fluids in particular and to non-Newtonian fluids in general. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows",
volume = "323",
pages = "223-238",
doi = "10.1007/978-3-030-86009-7_12"
}
Mirkov, N. S., Ouyahia, S. E., Lahlou, S., Pezo, M. L.,& Jovanović, R. D.. (2022). Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows. in Lecture Notes in Networks and Systems, 323, 223-238.
https://doi.org/10.1007/978-3-030-86009-7_12
Mirkov NS, Ouyahia SE, Lahlou S, Pezo ML, Jovanović RD. Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows. in Lecture Notes in Networks and Systems. 2022;323:223-238.
doi:10.1007/978-3-030-86009-7_12 .
Mirkov, Nikola S., Ouyahia, Seif Eddine, Lahlou, Sara, Pezo, Milada L., Jovanović, Rastko D., "Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows" in Lecture Notes in Networks and Systems, 323 (2022):223-238,
https://doi.org/10.1007/978-3-030-86009-7_12 . .

Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study

Pijović, Milena; Manić, Nebojša; Vasić Anićijević, Dragana D.; Krstić, Aleksandar; Mitrić, Miodrag; Matić, Tamara; Janković, Bojan

(2022)

TY  - JOUR
AU  - Pijović, Milena
AU  - Manić, Nebojša
AU  - Vasić Anićijević, Dragana D.
AU  - Krstić, Aleksandar
AU  - Mitrić, Miodrag
AU  - Matić, Tamara
AU  - Janković, Bojan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10077
AB  - Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 °C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2·g−1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from π-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.
T2  - Diamond and Related Materials
T1  - Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study
VL  - 121
SP  - 108768
DO  - 10.1016/j.diamond.2021.108768
ER  - 
@article{
author = "Pijović, Milena and Manić, Nebojša and Vasić Anićijević, Dragana D. and Krstić, Aleksandar and Mitrić, Miodrag and Matić, Tamara and Janković, Bojan",
year = "2022",
abstract = "Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 °C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2·g−1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from π-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.",
journal = "Diamond and Related Materials",
title = "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study",
volume = "121",
pages = "108768",
doi = "10.1016/j.diamond.2021.108768"
}
Pijović, M., Manić, N., Vasić Anićijević, D. D., Krstić, A., Mitrić, M., Matić, T.,& Janković, B.. (2022). Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials, 121, 108768.
https://doi.org/10.1016/j.diamond.2021.108768
Pijović M, Manić N, Vasić Anićijević DD, Krstić A, Mitrić M, Matić T, Janković B. Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials. 2022;121:108768.
doi:10.1016/j.diamond.2021.108768 .
Pijović, Milena, Manić, Nebojša, Vasić Anićijević, Dragana D., Krstić, Aleksandar, Mitrić, Miodrag, Matić, Tamara, Janković, Bojan, "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study" in Diamond and Related Materials, 121 (2022):108768,
https://doi.org/10.1016/j.diamond.2021.108768 . .

Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect

Kiris, Vasili; Savović, Jelena; Nevar, Alena; Kuzmanović, Miroslav; Nedelko, Mikhail; Ranković, Dragan; Tarasenko, Nikolai

(2022)

TY  - JOUR
AU  - Kiris, Vasili
AU  - Savović, Jelena
AU  - Nevar, Alena
AU  - Kuzmanović, Miroslav
AU  - Nedelko, Mikhail
AU  - Ranković, Dragan
AU  - Tarasenko, Nikolai
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10059
AB  - The analytical potential of LIBS for the analysis of liquid solutions was evaluated using two experimental setups, one based on a TEA CO2 laser and the other in which Nd:YAG laser was used. Polytetrafluoroethylene (PTFE) was used as a substrate on which a 10 μL drop of analyte solutions with different concentrations of analyte elements, Be, Cr, Ni, Co, Pb, Tl, and V, were deposited and dried. The samples were deposited either directly on the PTFE or over the pre-deposited layer of copper oxide nanoparticles to study the influence of nanoparticles (NPs) on the ablation and plasma excitation. The obtained results imply that the presence of Cu oxide NPs does not significantly affect the analytical performance of LIBS based on TEA CO2 laser for analysis of solutions. At the same time, it was shown that plasma created by TEA CO2 laser radiation efficiently excited ablated material, making metal elements detectable in the sub-ppm concentration range. On the other hand, Cu oxide NPs significantly influence the formation and the analytical properties of plasma induced by Nd:YAG laser. Without the presence of NPs, the intensities of analyte lines were very low, unsuitable for spectrochemical analysis. At the optimal surface concentration of NPs, 0.36 mg/cm2, the intensity of analyte lines was increased more than ten times. Limits of detection of Be and Cr were 5.3 ppb and 33 ppb, with good linearity of curves of growth.
T2  - Spectrochimica Acta Part B: Atomic Spectroscopy
T1  - Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect
VL  - 187
SP  - 106333
DO  - 10.1016/j.sab.2021.106333
ER  - 
@article{
author = "Kiris, Vasili and Savović, Jelena and Nevar, Alena and Kuzmanović, Miroslav and Nedelko, Mikhail and Ranković, Dragan and Tarasenko, Nikolai",
year = "2022",
abstract = "The analytical potential of LIBS for the analysis of liquid solutions was evaluated using two experimental setups, one based on a TEA CO2 laser and the other in which Nd:YAG laser was used. Polytetrafluoroethylene (PTFE) was used as a substrate on which a 10 μL drop of analyte solutions with different concentrations of analyte elements, Be, Cr, Ni, Co, Pb, Tl, and V, were deposited and dried. The samples were deposited either directly on the PTFE or over the pre-deposited layer of copper oxide nanoparticles to study the influence of nanoparticles (NPs) on the ablation and plasma excitation. The obtained results imply that the presence of Cu oxide NPs does not significantly affect the analytical performance of LIBS based on TEA CO2 laser for analysis of solutions. At the same time, it was shown that plasma created by TEA CO2 laser radiation efficiently excited ablated material, making metal elements detectable in the sub-ppm concentration range. On the other hand, Cu oxide NPs significantly influence the formation and the analytical properties of plasma induced by Nd:YAG laser. Without the presence of NPs, the intensities of analyte lines were very low, unsuitable for spectrochemical analysis. At the optimal surface concentration of NPs, 0.36 mg/cm2, the intensity of analyte lines was increased more than ten times. Limits of detection of Be and Cr were 5.3 ppb and 33 ppb, with good linearity of curves of growth.",
journal = "Spectrochimica Acta Part B: Atomic Spectroscopy",
title = "Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect",
volume = "187",
pages = "106333",
doi = "10.1016/j.sab.2021.106333"
}
Kiris, V., Savović, J., Nevar, A., Kuzmanović, M., Nedelko, M., Ranković, D.,& Tarasenko, N.. (2022). Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect. in Spectrochimica Acta Part B: Atomic Spectroscopy, 187, 106333.
https://doi.org/10.1016/j.sab.2021.106333
Kiris V, Savović J, Nevar A, Kuzmanović M, Nedelko M, Ranković D, Tarasenko N. Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect. in Spectrochimica Acta Part B: Atomic Spectroscopy. 2022;187:106333.
doi:10.1016/j.sab.2021.106333 .
Kiris, Vasili, Savović, Jelena, Nevar, Alena, Kuzmanović, Miroslav, Nedelko, Mikhail, Ranković, Dragan, Tarasenko, Nikolai, "Laser-induced breakdown spectroscopy analysis of water solutions deposited on PTFE surface: Influence of copper oxide nanoparticles and NELIBS effect" in Spectrochimica Acta Part B: Atomic Spectroscopy, 187 (2022):106333,
https://doi.org/10.1016/j.sab.2021.106333 . .

Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis

Đorđević, Ana; Živković, Maja; Končar, Igor; Stanković, Aleksandra; Kuveljić, Jovana; Đurić, Tamara

(2022)

TY  - JOUR
AU  - Đorđević, Ana
AU  - Živković, Maja
AU  - Končar, Igor
AU  - Stanković, Aleksandra
AU  - Kuveljić, Jovana
AU  - Đurić, Tamara
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10046
AB  - ObjectivesGalectin-3 affects a variety of biological processes. It is encoded by LGALS-3, located in unique haplotype block in Caucasians. Most of the studies regarding the gal-3 role in atherosclerosis are focused exclusively on protein/mRNA levels. Genetic analyses of LGALS-3 are scarce. We sought to thoroughly examine the genetic background of gal-3 and to analyze tag variants that cover more than 80% variability of the LGALS-3 containing hap-block in association with carotid plaque presence (CPP). According to Tagger server, rs4040064 G/T, rs11628437 G/A and rs7159490 C/T cover 82% (r2 > 0.8) of the genetic variance of this hap-block. Our aims were to investigate possible association of rs4040064, rs11628437 and rs7159490 haplotypes with CPP in patients with advanced carotid atherosclerosis (CA) and to analyze their possible effect on LGALS-3 mRNA expression in carotid plaques.Materials and methodsStudy group consisted of 468 patients and 296 controls. Rs4040064, rs11628437, rs7159490 and LGALS-3 mRNA expression were detected by TaqMan® technology.ResultsWe have found that haplotype TAC was associated with the cerebrovascular insult (CVI) occurrence (OR = 1.68, 95% CI = 1.09-2.58, p = 0.02), compared to the referent haplotype. OR was adjusted for hypertension, age and BMI. TAC also showed higher, but not statistically significant, LGALS-3 expression in carotid plaques.ConclusionsOur results suggest that rs4040064, rs11628437 and rs7159490 bear no association with CPP, neither they affect LGALS-3 mRNA in carotid plaques. However, we showed a significant association of haplotype TAC with the CVI occurrence in CA patients from Serbia. Replication and validation of our results are required.
T2  - Journal of Stroke and Cerebrovascular Diseases
T2  - Journal of Stroke and Cerebrovascular DiseasesJournal of Stroke and Cerebrovascular Diseases
T1  - Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis
VL  - 31
IS  - 1
SP  - 106212
DO  - 10.1016/j.jstrokecerebrovasdis.2021.106212
ER  - 
@article{
author = "Đorđević, Ana and Živković, Maja and Končar, Igor and Stanković, Aleksandra and Kuveljić, Jovana and Đurić, Tamara",
year = "2022",
abstract = "ObjectivesGalectin-3 affects a variety of biological processes. It is encoded by LGALS-3, located in unique haplotype block in Caucasians. Most of the studies regarding the gal-3 role in atherosclerosis are focused exclusively on protein/mRNA levels. Genetic analyses of LGALS-3 are scarce. We sought to thoroughly examine the genetic background of gal-3 and to analyze tag variants that cover more than 80% variability of the LGALS-3 containing hap-block in association with carotid plaque presence (CPP). According to Tagger server, rs4040064 G/T, rs11628437 G/A and rs7159490 C/T cover 82% (r2 > 0.8) of the genetic variance of this hap-block. Our aims were to investigate possible association of rs4040064, rs11628437 and rs7159490 haplotypes with CPP in patients with advanced carotid atherosclerosis (CA) and to analyze their possible effect on LGALS-3 mRNA expression in carotid plaques.Materials and methodsStudy group consisted of 468 patients and 296 controls. Rs4040064, rs11628437, rs7159490 and LGALS-3 mRNA expression were detected by TaqMan® technology.ResultsWe have found that haplotype TAC was associated with the cerebrovascular insult (CVI) occurrence (OR = 1.68, 95% CI = 1.09-2.58, p = 0.02), compared to the referent haplotype. OR was adjusted for hypertension, age and BMI. TAC also showed higher, but not statistically significant, LGALS-3 expression in carotid plaques.ConclusionsOur results suggest that rs4040064, rs11628437 and rs7159490 bear no association with CPP, neither they affect LGALS-3 mRNA in carotid plaques. However, we showed a significant association of haplotype TAC with the CVI occurrence in CA patients from Serbia. Replication and validation of our results are required.",
journal = "Journal of Stroke and Cerebrovascular Diseases, Journal of Stroke and Cerebrovascular DiseasesJournal of Stroke and Cerebrovascular Diseases",
title = "Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis",
volume = "31",
number = "1",
pages = "106212",
doi = "10.1016/j.jstrokecerebrovasdis.2021.106212"
}
Đorđević, A., Živković, M., Končar, I., Stanković, A., Kuveljić, J.,& Đurić, T.. (2022). Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis. in Journal of Stroke and Cerebrovascular Diseases, 31(1), 106212.
https://doi.org/10.1016/j.jstrokecerebrovasdis.2021.106212
Đorđević A, Živković M, Končar I, Stanković A, Kuveljić J, Đurić T. Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis. in Journal of Stroke and Cerebrovascular Diseases. 2022;31(1):106212.
doi:10.1016/j.jstrokecerebrovasdis.2021.106212 .
Đorđević, Ana, Živković, Maja, Končar, Igor, Stanković, Aleksandra, Kuveljić, Jovana, Đurić, Tamara, "Tag Variants of LGALS-3 Containing Haplotype Block in Advanced Carotid Atherosclerosis" in Journal of Stroke and Cerebrovascular Diseases, 31, no. 1 (2022):106212,
https://doi.org/10.1016/j.jstrokecerebrovasdis.2021.106212 . .

TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis

Trtica, Milan; Kuzmanović, Miroslav; Savović, Jelena; Ranković, Dragan

(2022)

TY  - JOUR
AU  - Trtica, Milan
AU  - Kuzmanović, Miroslav
AU  - Savović, Jelena
AU  - Ranković, Dragan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9972
AB  - The interaction of a Transversely Excited Atmospheric (TEA) CO2 laser with a polymer polymethyl methacrylate (PMMA) sample in a vacuum ambiance was studied. The main goal was to demonstrate the feasibility of laser-induced breakdown spectroscopy (LIBS) to detect hydrogen. The generation of plasma over the PMMA surface, using a low laser intensity of ∼ 48 MW/cm2 and fluence of ∼ 16.5 J/cm2, required the application of a metal sub-target. Besides hydrogen, the recorded spectra were dominated by atomic lines of carbon and oxygen and band emission of the C2 and CN molecules. The electron number density and temperature (ionic, vibrational, and rotational) were evaluated to characterize the laser-induced plasma. In addition, PMMA micro-damages (diameter ∼ 45 µm) created by a multipulse laser ablation could find potential applications in sensor technologies.
T2  - Applied Surface Science
T1  - TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis
VL  - 572
SP  - 151424
DO  - 10.1016/j.apsusc.2021.151424
ER  - 
@article{
author = "Trtica, Milan and Kuzmanović, Miroslav and Savović, Jelena and Ranković, Dragan",
year = "2022",
abstract = "The interaction of a Transversely Excited Atmospheric (TEA) CO2 laser with a polymer polymethyl methacrylate (PMMA) sample in a vacuum ambiance was studied. The main goal was to demonstrate the feasibility of laser-induced breakdown spectroscopy (LIBS) to detect hydrogen. The generation of plasma over the PMMA surface, using a low laser intensity of ∼ 48 MW/cm2 and fluence of ∼ 16.5 J/cm2, required the application of a metal sub-target. Besides hydrogen, the recorded spectra were dominated by atomic lines of carbon and oxygen and band emission of the C2 and CN molecules. The electron number density and temperature (ionic, vibrational, and rotational) were evaluated to characterize the laser-induced plasma. In addition, PMMA micro-damages (diameter ∼ 45 µm) created by a multipulse laser ablation could find potential applications in sensor technologies.",
journal = "Applied Surface Science",
title = "TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis",
volume = "572",
pages = "151424",
doi = "10.1016/j.apsusc.2021.151424"
}
Trtica, M., Kuzmanović, M., Savović, J.,& Ranković, D.. (2022). TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis. in Applied Surface Science, 572, 151424.
https://doi.org/10.1016/j.apsusc.2021.151424
Trtica M, Kuzmanović M, Savović J, Ranković D. TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis. in Applied Surface Science. 2022;572:151424.
doi:10.1016/j.apsusc.2021.151424 .
Trtica, Milan, Kuzmanović, Miroslav, Savović, Jelena, Ranković, Dragan, "TEA CO2 Laser – Polymethyl Methacrylate Interaction: LIBS Hydrogen Analysis" in Applied Surface Science, 572 (2022):151424,
https://doi.org/10.1016/j.apsusc.2021.151424 . .

Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project

Kržanović, Nikola; Blideanu, Valentin; Ciraj-Bjelac, Olivera; Plagnard, Johann; Schoonjans, Werner; Živanović, Miloš Z.; Dabin, Jérémie

(2021)

TY  - JOUR
AU  - Kržanović, Nikola
AU  - Blideanu, Valentin
AU  - Ciraj-Bjelac, Olivera
AU  - Plagnard, Johann
AU  - Schoonjans, Werner
AU  - Živanović, Miloš Z.
AU  - Dabin, Jérémie
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9554
AB  - Interventional procedures in radiology and cardiology are associated with high dose to the patient. Accurate dosimetry is essential and calibration of the equipment is a means to provide the necessary accuracy of dose assessment. The objective of this work is to investigate the performance of dosimeters used in interventional procedures in different standard and non-standard X-ray radiation qualities, and to investigate potential uncertainties related to dose measurements, thus improving accuracy of patient dosimetry in interventional procedures. Four new reference radiation qualities dedicated to interventional cardiology applications have been established, allowing calibration of dosimeters used in clinical conditions with appropriate traceability to primary standards. Testing of solid-state semiconductor detectors and thermoluminescent dosimeter properties, e.g. influence of photon energy, angle of incidence and dose rate, was performed in the standard and non-standard radiation qualities. Both dosimeter types showed good performance in the non-standard beams during all performance tests. Solid-state dosimeters displayed weak dependence on energy, angle of incidence and dose rate, in the range defined by the manufacturer and requirements of the international standard. Thermoluminescent dosimeters displayed excellent linearity and angular dependence. The influence of energy dependence on measurement uncertainty can be reduced if appropriate radiation quality is selected for calibration. © 2021 Elsevier Ltd
T2  - Radiation Measurements
T1  - Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project
VL  - 141
SP  - 106515
DO  - 10.1016/j.radmeas.2021.106515
ER  - 
@article{
author = "Kržanović, Nikola and Blideanu, Valentin and Ciraj-Bjelac, Olivera and Plagnard, Johann and Schoonjans, Werner and Živanović, Miloš Z. and Dabin, Jérémie",
year = "2021",
abstract = "Interventional procedures in radiology and cardiology are associated with high dose to the patient. Accurate dosimetry is essential and calibration of the equipment is a means to provide the necessary accuracy of dose assessment. The objective of this work is to investigate the performance of dosimeters used in interventional procedures in different standard and non-standard X-ray radiation qualities, and to investigate potential uncertainties related to dose measurements, thus improving accuracy of patient dosimetry in interventional procedures. Four new reference radiation qualities dedicated to interventional cardiology applications have been established, allowing calibration of dosimeters used in clinical conditions with appropriate traceability to primary standards. Testing of solid-state semiconductor detectors and thermoluminescent dosimeter properties, e.g. influence of photon energy, angle of incidence and dose rate, was performed in the standard and non-standard radiation qualities. Both dosimeter types showed good performance in the non-standard beams during all performance tests. Solid-state dosimeters displayed weak dependence on energy, angle of incidence and dose rate, in the range defined by the manufacturer and requirements of the international standard. Thermoluminescent dosimeters displayed excellent linearity and angular dependence. The influence of energy dependence on measurement uncertainty can be reduced if appropriate radiation quality is selected for calibration. © 2021 Elsevier Ltd",
journal = "Radiation Measurements",
title = "Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project",
volume = "141",
pages = "106515",
doi = "10.1016/j.radmeas.2021.106515"
}
Kržanović, N., Blideanu, V., Ciraj-Bjelac, O., Plagnard, J., Schoonjans, W., Živanović, M. Z.,& Dabin, J.. (2021). Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project. in Radiation Measurements, 141, 106515.
https://doi.org/10.1016/j.radmeas.2021.106515
Kržanović N, Blideanu V, Ciraj-Bjelac O, Plagnard J, Schoonjans W, Živanović MZ, Dabin J. Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project. in Radiation Measurements. 2021;141:106515.
doi:10.1016/j.radmeas.2021.106515 .
Kržanović, Nikola, Blideanu, Valentin, Ciraj-Bjelac, Olivera, Plagnard, Johann, Schoonjans, Werner, Živanović, Miloš Z., Dabin, Jérémie, "Performance testing of dosimeters used in interventional radiology: Results from the VERIDIC project" in Radiation Measurements, 141 (2021):106515,
https://doi.org/10.1016/j.radmeas.2021.106515 . .
3
1

Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro

Ivković, Ivana; Bukvički, Danka; Novaković, Miroslav M.; Majstorović, Ivana; Leskovac, Andreja; Petrović, Sandra; Veljić, Milan

(2021)

TY  - JOUR
AU  - Ivković, Ivana
AU  - Bukvički, Danka
AU  - Novaković, Miroslav M.
AU  - Majstorović, Ivana
AU  - Leskovac, Andreja
AU  - Petrović, Sandra
AU  - Veljić, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10051
AB  - Liverworts are characterized by a high content of bioactive compounds reported to show antimicrobial, anticancer, and antioxidant properties. In this study, the biological effects of the methanol extract of the liverwort Pellia endiviifolia and its constituents, bis-bibenzyls perrottetin E, 10′-hydroxyperrottetin E, and 10,10′-dihydroxyperrottetin E, were investigated using human peripheral blood cells as a model system. The assessment of the investigated compounds comprised testing their genotoxicity, apoptotic potential, and redox modulating activities. The genotoxicity testing indicated that medium (25 µM) and high concentrations (100 µM) of the investigated compounds displayed genotoxic and antiproliferative effects in human lymphocytes as revealed by significant, concentration-dependent enhancement of the micronuclei incidence and decrease in the cytokinesis-block proliferation index compared to the control (P <.001). Analysis of leukocyte apoptosis showed a substantial potential of all investigated compounds to induce apoptosis, which was not concentration-dependent. The P endiviifolia extract and perrottetin E demonstrated considerable pro-apoptotic potential, even at the lowest concentration (1 µM) applied. Evaluation of the redox modulating effects, which comprised measuring erythrocyte catalase activity and the lymphocyte malondialdehyde level, showed that the investigated compounds did not induce oxidative stress in human peripheral blood cells (P >.05). The observed genotoxic, antiproliferative, and proapoptotic effects of the investigated compounds make them suitable for further comprehensive studies related to their possible applications as anticancer agents.
T2  - Natural Product Communications
T1  - Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro
VL  - 16
IS  - 11
SP  - 1
DO  - 10.1177/1934578X211056422
ER  - 
@article{
author = "Ivković, Ivana and Bukvički, Danka and Novaković, Miroslav M. and Majstorović, Ivana and Leskovac, Andreja and Petrović, Sandra and Veljić, Milan",
year = "2021",
abstract = "Liverworts are characterized by a high content of bioactive compounds reported to show antimicrobial, anticancer, and antioxidant properties. In this study, the biological effects of the methanol extract of the liverwort Pellia endiviifolia and its constituents, bis-bibenzyls perrottetin E, 10′-hydroxyperrottetin E, and 10,10′-dihydroxyperrottetin E, were investigated using human peripheral blood cells as a model system. The assessment of the investigated compounds comprised testing their genotoxicity, apoptotic potential, and redox modulating activities. The genotoxicity testing indicated that medium (25 µM) and high concentrations (100 µM) of the investigated compounds displayed genotoxic and antiproliferative effects in human lymphocytes as revealed by significant, concentration-dependent enhancement of the micronuclei incidence and decrease in the cytokinesis-block proliferation index compared to the control (P <.001). Analysis of leukocyte apoptosis showed a substantial potential of all investigated compounds to induce apoptosis, which was not concentration-dependent. The P endiviifolia extract and perrottetin E demonstrated considerable pro-apoptotic potential, even at the lowest concentration (1 µM) applied. Evaluation of the redox modulating effects, which comprised measuring erythrocyte catalase activity and the lymphocyte malondialdehyde level, showed that the investigated compounds did not induce oxidative stress in human peripheral blood cells (P >.05). The observed genotoxic, antiproliferative, and proapoptotic effects of the investigated compounds make them suitable for further comprehensive studies related to their possible applications as anticancer agents.",
journal = "Natural Product Communications",
title = "Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro",
volume = "16",
number = "11",
pages = "1",
doi = "10.1177/1934578X211056422"
}
Ivković, I., Bukvički, D., Novaković, M. M., Majstorović, I., Leskovac, A., Petrović, S.,& Veljić, M.. (2021). Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro. in Natural Product Communications, 16(11), 1.
https://doi.org/10.1177/1934578X211056422
Ivković I, Bukvički D, Novaković MM, Majstorović I, Leskovac A, Petrović S, Veljić M. Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro. in Natural Product Communications. 2021;16(11):1.
doi:10.1177/1934578X211056422 .
Ivković, Ivana, Bukvički, Danka, Novaković, Miroslav M., Majstorović, Ivana, Leskovac, Andreja, Petrović, Sandra, Veljić, Milan, "Assessment of the Biological Effects of Pellia endiviifolia and its Constituents in Vitro" in Natural Product Communications, 16, no. 11 (2021):1,
https://doi.org/10.1177/1934578X211056422 . .

The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study

Ćirić, Jelena; Ćirić, Aleksandar

(2021)

TY  - JOUR
AU  - Ćirić, Jelena
AU  - Ćirić, Aleksandar
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9659
AB  - The COVID-19 infectious disease in 2020 caused a global and subsequent lockdown policies imposed by various governments. Public libraries were affected as well. For many public libraries, the only one that remained active and available to users was access to their digital content. The Njegoš public library in Knjaževac, Serbia, responded by improving access to, and promoting, its vast digital content. The library also monitored access to the digital library, hypothesizing that the conclusions from the statistical data would bring insights and future improvements. The statistical data from the website of the public library revealed users’ most popular times of day and days of the week during the pandemic and in normal times. Regarding the devices used for access, there was a trend toward more up-to-date operating systems and also toward mobile devices. The average time reading increased by approximately 130%, with the highest peak during the most restrictive lockdown in March 2020. Thus, digital library servers should have the capacity to handle such increases in network traffic, at increased download speeds. Library posts on social media, specifically Facebook, were viewed an order of magnitude times during the pandemic when compared with posts from the previous year. Thus, social media posts were an effective pathway for promoting the digital library during the pandemic-induced lockdown. © 2021 Jelena Ćirić, Aleksandar Ćirić 89101.
T2  - Journal of Web Librarianship
T1  - The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study
VL  - 15
IS  - 2
SP  - 53
EP  - 68
DO  - 10.1080/19322909.2021.1913465
ER  - 
@article{
author = "Ćirić, Jelena and Ćirić, Aleksandar",
year = "2021",
abstract = "The COVID-19 infectious disease in 2020 caused a global and subsequent lockdown policies imposed by various governments. Public libraries were affected as well. For many public libraries, the only one that remained active and available to users was access to their digital content. The Njegoš public library in Knjaževac, Serbia, responded by improving access to, and promoting, its vast digital content. The library also monitored access to the digital library, hypothesizing that the conclusions from the statistical data would bring insights and future improvements. The statistical data from the website of the public library revealed users’ most popular times of day and days of the week during the pandemic and in normal times. Regarding the devices used for access, there was a trend toward more up-to-date operating systems and also toward mobile devices. The average time reading increased by approximately 130%, with the highest peak during the most restrictive lockdown in March 2020. Thus, digital library servers should have the capacity to handle such increases in network traffic, at increased download speeds. Library posts on social media, specifically Facebook, were viewed an order of magnitude times during the pandemic when compared with posts from the previous year. Thus, social media posts were an effective pathway for promoting the digital library during the pandemic-induced lockdown. © 2021 Jelena Ćirić, Aleksandar Ćirić 89101.",
journal = "Journal of Web Librarianship",
title = "The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study",
volume = "15",
number = "2",
pages = "53-68",
doi = "10.1080/19322909.2021.1913465"
}
Ćirić, J.,& Ćirić, A.. (2021). The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study. in Journal of Web Librarianship, 15(2), 53-68.
https://doi.org/10.1080/19322909.2021.1913465
Ćirić J, Ćirić A. The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study. in Journal of Web Librarianship. 2021;15(2):53-68.
doi:10.1080/19322909.2021.1913465 .
Ćirić, Jelena, Ćirić, Aleksandar, "The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study" in Journal of Web Librarianship, 15, no. 2 (2021):53-68,
https://doi.org/10.1080/19322909.2021.1913465 . .
9
1
1

Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures

Ristić, Zoran; Đorđević, Vesna R.; Medić, Mina; Kuzman, Sanja; Sekulić, Milica; Antić, Željka; Dramićanin, Miroslav

(2021)

TY  - JOUR
AU  - Ristić, Zoran
AU  - Đorđević, Vesna R.
AU  - Medić, Mina
AU  - Kuzman, Sanja
AU  - Sekulić, Milica
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9624
AB  - Cr3+-doped Mg2SiO4 orthorhombic nanoparticles are synthesized by a combustion method. The 3d3 electron configuration of the Cr3+ ion results in the deep-red emission from optical transitions between d-d orbitals. Two overlapping emissions from the Cr3+ spin-forbidden 2Eg→ 4A2g and the spin-allowed 4T2g→ 4A2g electronic transitions are influenced by the strong crystal field in Mg2SiO4 and, thus, are suitable for ratiometric luminescence thermometry. The temperature-induced changes in Cr3+-doped Mg2SiO4 emission are tested for use in luminescence thermometry from cryogenic to physiologically relevant temperatures (10-350 K) by three approaches: (a) temperature-induced changes of emission intensity; (b) temperature-dependent luminescence lifetime; and (c) temperature-induced changes of emission band position. The second approach offers applicable thermometry at cryogenic temperatures, starting from temperatures as low as 50 K, while all three approaches offer applicable thermometry at physiologically relevant temperatures with relative sensitivities of 0.7% K-1 for emission intensity, 0.8% K-1 for lifetime and 0.85% K-1 for band position at 310 K. © 2021 IOP Publishing Ltd.
T2  - Measurement Science and Technology
T1  - Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures
VL  - 32
IS  - 5
SP  - 054004
DO  - 10.1088/1361-6501/abdc9a
ER  - 
@article{
author = "Ristić, Zoran and Đorđević, Vesna R. and Medić, Mina and Kuzman, Sanja and Sekulić, Milica and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "Cr3+-doped Mg2SiO4 orthorhombic nanoparticles are synthesized by a combustion method. The 3d3 electron configuration of the Cr3+ ion results in the deep-red emission from optical transitions between d-d orbitals. Two overlapping emissions from the Cr3+ spin-forbidden 2Eg→ 4A2g and the spin-allowed 4T2g→ 4A2g electronic transitions are influenced by the strong crystal field in Mg2SiO4 and, thus, are suitable for ratiometric luminescence thermometry. The temperature-induced changes in Cr3+-doped Mg2SiO4 emission are tested for use in luminescence thermometry from cryogenic to physiologically relevant temperatures (10-350 K) by three approaches: (a) temperature-induced changes of emission intensity; (b) temperature-dependent luminescence lifetime; and (c) temperature-induced changes of emission band position. The second approach offers applicable thermometry at cryogenic temperatures, starting from temperatures as low as 50 K, while all three approaches offer applicable thermometry at physiologically relevant temperatures with relative sensitivities of 0.7% K-1 for emission intensity, 0.8% K-1 for lifetime and 0.85% K-1 for band position at 310 K. © 2021 IOP Publishing Ltd.",
journal = "Measurement Science and Technology",
title = "Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures",
volume = "32",
number = "5",
pages = "054004",
doi = "10.1088/1361-6501/abdc9a"
}
Ristić, Z., Đorđević, V. R., Medić, M., Kuzman, S., Sekulić, M., Antić, Ž.,& Dramićanin, M.. (2021). Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures. in Measurement Science and Technology, 32(5), 054004.
https://doi.org/10.1088/1361-6501/abdc9a
Ristić Z, Đorđević VR, Medić M, Kuzman S, Sekulić M, Antić Ž, Dramićanin M. Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures. in Measurement Science and Technology. 2021;32(5):054004.
doi:10.1088/1361-6501/abdc9a .
Ristić, Zoran, Đorđević, Vesna R., Medić, Mina, Kuzman, Sanja, Sekulić, Milica, Antić, Željka, Dramićanin, Miroslav, "Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures" in Measurement Science and Technology, 32, no. 5 (2021):054004,
https://doi.org/10.1088/1361-6501/abdc9a . .
9
8

Radionuclides’ content in forest ecosystem located in southwestern part of Serbia

Hadrović, Sabahudin H.; Čeliković, Igor T.; Krneta-Nikolić, Jelena D.; Rajačić, Milica M.; Todorović, Dragana J.

(2021)

TY  - JOUR
AU  - Hadrović, Sabahudin H.
AU  - Čeliković, Igor T.
AU  - Krneta-Nikolić, Jelena D.
AU  - Rajačić, Milica M.
AU  - Todorović, Dragana J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10071
AB  - The results of the gamma-spectrometric measurements in a 16500 ha large region of south-western Serbia, are presented. Activity concentrations of 40K, 137Cs, and 210Pb in different deciduous and evergreen trees in the region are investigated. For all the investigated isotopes, there is a tendency that, on average, the lowest activity concentrations were found in tree stems, then in leaves, while the highest ones were in the soil. Statistical analysis did not show any differences between activity concentrations of leaves and needles, showing that both leaves and needles could be equally well used as a biomonitors.
T2  - Nuclear Technology and Radiation Protection
T1  - Radionuclides’ content in forest ecosystem located in southwestern part of Serbia
VL  - 36
IS  - 2
SP  - 192
EP  - 196
DO  - 10.2298/NTRP210112014H
ER  - 
@article{
author = "Hadrović, Sabahudin H. and Čeliković, Igor T. and Krneta-Nikolić, Jelena D. and Rajačić, Milica M. and Todorović, Dragana J.",
year = "2021",
abstract = "The results of the gamma-spectrometric measurements in a 16500 ha large region of south-western Serbia, are presented. Activity concentrations of 40K, 137Cs, and 210Pb in different deciduous and evergreen trees in the region are investigated. For all the investigated isotopes, there is a tendency that, on average, the lowest activity concentrations were found in tree stems, then in leaves, while the highest ones were in the soil. Statistical analysis did not show any differences between activity concentrations of leaves and needles, showing that both leaves and needles could be equally well used as a biomonitors.",
journal = "Nuclear Technology and Radiation Protection",
title = "Radionuclides’ content in forest ecosystem located in southwestern part of Serbia",
volume = "36",
number = "2",
pages = "192-196",
doi = "10.2298/NTRP210112014H"
}
Hadrović, S. H., Čeliković, I. T., Krneta-Nikolić, J. D., Rajačić, M. M.,& Todorović, D. J.. (2021). Radionuclides’ content in forest ecosystem located in southwestern part of Serbia. in Nuclear Technology and Radiation Protection, 36(2), 192-196.
https://doi.org/10.2298/NTRP210112014H
Hadrović SH, Čeliković IT, Krneta-Nikolić JD, Rajačić MM, Todorović DJ. Radionuclides’ content in forest ecosystem located in southwestern part of Serbia. in Nuclear Technology and Radiation Protection. 2021;36(2):192-196.
doi:10.2298/NTRP210112014H .
Hadrović, Sabahudin H., Čeliković, Igor T., Krneta-Nikolić, Jelena D., Rajačić, Milica M., Todorović, Dragana J., "Radionuclides’ content in forest ecosystem located in southwestern part of Serbia" in Nuclear Technology and Radiation Protection, 36, no. 2 (2021):192-196,
https://doi.org/10.2298/NTRP210112014H . .

Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji

Đurašević, Mirjana M.; Kandić, Aleksandar; Vukanac, Ivana; Čeliković, Igor T.; Mladenović-Nikolić, Nataša; Milanović, Tamara; Obradović, Zorica

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Čeliković, Igor T.
AU  - Mladenović-Nikolić, Nataša
AU  - Milanović, Tamara
AU  - Obradović, Zorica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10011
AB  - Da bi se postigla tačnost i preciznost dobijenih rezultata pri gamaspektrometrijskom merenju uzoraka iz životne sredine neophodno je obezbediti odgovarajuće kalibracione standarde. Imajući u vidu da i sami standardi vremenom gube na kvalitetu zbog degradacije matriksa, od izuzetne je važnosti praćenje stabilnosti standarda koji se koriste. U ovom radu prikazani su rezultati ispitivanja karakteristika krivih efikasnosti u odnosu na starenje matriksa. Napravljeni su radni kalibracioni standardi sa tri različita matriksa (aktivni ugalj, zemlja i pesak), upakovani u cilindričnu geometriju kutijice od 120 ml i 250 ml i mereni na poluprovodničkom HPGe detektoru. Isti standardi ponovo su mereni nakon četiri godine u kontakt geometriji u odnosu na detektor i izvrnuto sa poklopcem kutijice ka detektoru. Analiza dobijenih rezultata pokazala je odstupanja u vrednostima efikasnosti, što ukazuje na degradaciju svih standarda u smislu narušavanja njihove homogenosti. Takvi standardi se ne mogu smatrati pouzdanim za korišćenje.
AB  - The gammaspectrometric measurement of the environmental samples requires the use of appropriate calibration standards in order to achieve the accuracy and precision of the obtained results. Taking into account that the standards lose their quality over time due to the degradation of the matrix, it is extremely important to keep tracking their stability. Comprehensive reconsideration on efficiency curves with respect to the ageing of calibration standards is presented in this paper. Spiked laboratory standards of different matrices (active coal, soil and sand) were prepared in two measurement geometries, PVC cylindrical 120 ml and 250 ml boxes. The same standards were measured after four years in contact geometry on the detector and upside down (box cover towards the detector). The analysis of the obtained results showed discrepancies in efficiency values and it indicates that the homogeneity of standards is disturbed. Such standards are not reliable for use.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji
T1  - On the Long-Term Stability of the Calibration Standards in Different Matrices for Gamma-Ray Spectrometry
SP  - 181
EP  - 186
ER  - 
@conference{
author = "Đurašević, Mirjana M. and Kandić, Aleksandar and Vukanac, Ivana and Čeliković, Igor T. and Mladenović-Nikolić, Nataša and Milanović, Tamara and Obradović, Zorica",
year = "2021",
abstract = "Da bi se postigla tačnost i preciznost dobijenih rezultata pri gamaspektrometrijskom merenju uzoraka iz životne sredine neophodno je obezbediti odgovarajuće kalibracione standarde. Imajući u vidu da i sami standardi vremenom gube na kvalitetu zbog degradacije matriksa, od izuzetne je važnosti praćenje stabilnosti standarda koji se koriste. U ovom radu prikazani su rezultati ispitivanja karakteristika krivih efikasnosti u odnosu na starenje matriksa. Napravljeni su radni kalibracioni standardi sa tri različita matriksa (aktivni ugalj, zemlja i pesak), upakovani u cilindričnu geometriju kutijice od 120 ml i 250 ml i mereni na poluprovodničkom HPGe detektoru. Isti standardi ponovo su mereni nakon četiri godine u kontakt geometriji u odnosu na detektor i izvrnuto sa poklopcem kutijice ka detektoru. Analiza dobijenih rezultata pokazala je odstupanja u vrednostima efikasnosti, što ukazuje na degradaciju svih standarda u smislu narušavanja njihove homogenosti. Takvi standardi se ne mogu smatrati pouzdanim za korišćenje., The gammaspectrometric measurement of the environmental samples requires the use of appropriate calibration standards in order to achieve the accuracy and precision of the obtained results. Taking into account that the standards lose their quality over time due to the degradation of the matrix, it is extremely important to keep tracking their stability. Comprehensive reconsideration on efficiency curves with respect to the ageing of calibration standards is presented in this paper. Spiked laboratory standards of different matrices (active coal, soil and sand) were prepared in two measurement geometries, PVC cylindrical 120 ml and 250 ml boxes. The same standards were measured after four years in contact geometry on the detector and upside down (box cover towards the detector). The analysis of the obtained results showed discrepancies in efficiency values and it indicates that the homogeneity of standards is disturbed. Such standards are not reliable for use.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji, On the Long-Term Stability of the Calibration Standards in Different Matrices for Gamma-Ray Spectrometry",
pages = "181-186"
}
Đurašević, M. M., Kandić, A., Vukanac, I., Čeliković, I. T., Mladenović-Nikolić, N., Milanović, T.,& Obradović, Z.. (2021). Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 181-186.
Đurašević MM, Kandić A, Vukanac I, Čeliković IT, Mladenović-Nikolić N, Milanović T, Obradović Z. Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:181-186..
Đurašević, Mirjana M., Kandić, Aleksandar, Vukanac, Ivana, Čeliković, Igor T., Mladenović-Nikolić, Nataša, Milanović, Tamara, Obradović, Zorica, "Dugovremenska stabilnost kalibracionih standarda različitih matriksa u gamaspektrometriji" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):181-186.

Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori

Čeliković, Igor T.; Zekić, Ranko; Svrkota, Nikola; Vukanac, Ivana; Živanović, Miloš Z.; Krneta-Nikolić, Jelena D.; Vukotić, Perko; Pantelić, Gordana K.

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Čeliković, Igor T.
AU  - Zekić, Ranko
AU  - Svrkota, Nikola
AU  - Vukanac, Ivana
AU  - Živanović, Miloš Z.
AU  - Krneta-Nikolić, Jelena D.
AU  - Vukotić, Perko
AU  - Pantelić, Gordana K.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10002
AB  - U radu su prikazani rezultati merenja radonskog ravnotežnog faktora aktivnom metodom na 5 lokacija u Crnoj Gori i Srbiji. Dobijeni rezultati su u rasponu od 0.36 do 0.7, što je u proseku veće od preporučene vrednosti od 0.4. Na istim lokacijama su izvršena interkomparativna merenja koncentracije radona (uređajima Alpha Guard Pro, RAD7 i RTM1688-2), ravnotežne ekvivalentne koncentracije radona (uređajima RNWL i RPM2200) i radonskog ravnotežnog faktora. Slaganje rezultata je testirano Z-testom koji ukazuje da ne postoji statistički značajno odstupanje između rezultata dobijenih različitim mernim uređajima, odnosno ne postoji nekonzistentnost između različitih metodologija merenja kao ni potrebe za harmonizacijom različitih procedura merenja.
AB  - In this contribution, the results of radon equilibrium factor measurement in selected dwelling and workplaces in Montenegro and Serbia are presented. Radon equilibrium factor was derived from measurements of indoor radon concentration and equilibrium equivalent radon concentration. Measurements were performed one day for each of 5 locations by using different active devices. Obtained radon equilibrium factors range from 0.36 to 0.7 which is in average larger than worldwide average of 0.4 Results are not surprising since measuring locations were kept closed during the measuring time, reducing therefore ventilation rate which as a consequence has an increase of equilibrium factor. Individual measuring results of indoor radon concentrations, equilibrium equivalent radon concentrations and radon equilibrium factors obtained with different detectors systems from 2 research teams was tested using Z – test. Obtained Z – score for each measurement vas below critical value, indication that there is no statistical difference between different measuring devices.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori
T1  - Radon Equilibrium Factor in Selected Dwellings and Workplaces in Montenegro and Serbia
SP  - 121
EP  - 127
ER  - 
@conference{
author = "Čeliković, Igor T. and Zekić, Ranko and Svrkota, Nikola and Vukanac, Ivana and Živanović, Miloš Z. and Krneta-Nikolić, Jelena D. and Vukotić, Perko and Pantelić, Gordana K.",
year = "2021",
abstract = "U radu su prikazani rezultati merenja radonskog ravnotežnog faktora aktivnom metodom na 5 lokacija u Crnoj Gori i Srbiji. Dobijeni rezultati su u rasponu od 0.36 do 0.7, što je u proseku veće od preporučene vrednosti od 0.4. Na istim lokacijama su izvršena interkomparativna merenja koncentracije radona (uređajima Alpha Guard Pro, RAD7 i RTM1688-2), ravnotežne ekvivalentne koncentracije radona (uređajima RNWL i RPM2200) i radonskog ravnotežnog faktora. Slaganje rezultata je testirano Z-testom koji ukazuje da ne postoji statistički značajno odstupanje između rezultata dobijenih različitim mernim uređajima, odnosno ne postoji nekonzistentnost između različitih metodologija merenja kao ni potrebe za harmonizacijom različitih procedura merenja., In this contribution, the results of radon equilibrium factor measurement in selected dwelling and workplaces in Montenegro and Serbia are presented. Radon equilibrium factor was derived from measurements of indoor radon concentration and equilibrium equivalent radon concentration. Measurements were performed one day for each of 5 locations by using different active devices. Obtained radon equilibrium factors range from 0.36 to 0.7 which is in average larger than worldwide average of 0.4 Results are not surprising since measuring locations were kept closed during the measuring time, reducing therefore ventilation rate which as a consequence has an increase of equilibrium factor. Individual measuring results of indoor radon concentrations, equilibrium equivalent radon concentrations and radon equilibrium factors obtained with different detectors systems from 2 research teams was tested using Z – test. Obtained Z – score for each measurement vas below critical value, indication that there is no statistical difference between different measuring devices.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori, Radon Equilibrium Factor in Selected Dwellings and Workplaces in Montenegro and Serbia",
pages = "121-127"
}
Čeliković, I. T., Zekić, R., Svrkota, N., Vukanac, I., Živanović, M. Z., Krneta-Nikolić, J. D., Vukotić, P.,& Pantelić, G. K.. (2021). Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 121-127.
Čeliković IT, Zekić R, Svrkota N, Vukanac I, Živanović MZ, Krneta-Nikolić JD, Vukotić P, Pantelić GK. Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:121-127..
Čeliković, Igor T., Zekić, Ranko, Svrkota, Nikola, Vukanac, Ivana, Živanović, Miloš Z., Krneta-Nikolić, Jelena D., Vukotić, Perko, Pantelić, Gordana K., "Radonski ravnotežni faktor u izabranim rezidencijalnim i radnim objektima u Srbiji i Crnoj Gori" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):121-127.

Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska

Forkapić, Sofija; Đorđević, Dragana; Đuričić-Milanković, Jelena; Čeliković, Igor T.; Kandić, Aleksandar; Hansman, Jan; Bikit, Kristina

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Forkapić, Sofija
AU  - Đorđević, Dragana
AU  - Đuričić-Milanković, Jelena
AU  - Čeliković, Igor T.
AU  - Kandić, Aleksandar
AU  - Hansman, Jan
AU  - Bikit, Kristina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10001
AB  - Glavni izvori aerozagađenja u Srbiji su energetski sektor u koji spadaju termoelektrane, toplane i pojedinačno grejanje domaćinstava, potom transportni sektor i industrijska aktivnost (rafinerije nafte, hemijska industrija, rudarstvo i sl.). Procenjeno je da je broj preranih smrti izazvanih aerozagađenjem u Srbiji, među najvećima u Evropi. Najvažniji parametri za praćenje su koncentracija čestica i njihova raspodela u veličini. Uzorkovanje suspendovanih čestica atmosfere (particulate matter - PM) frakcionisanih po veličini sprovedeno je u periodu od marta 2012. godine do decembra 2013. godine u suburbanom delu Beograda na pozadinskoj mernoj stanici Zeleno brdo, kao receptorskom mestu. Svaki šesti dan uziman je po jedan usrednjeni 48-časovni uzorak aerosolnih čestica razdvojenih na jedanaest intervala aerodinamičkih prečnika čestica (particle diameter - Dp) pomoću kaskadnog impaktora niskog pritiska prof. dr. Bernera - LPI 25/0,0085/2 u opsegu veličine čestica (0,0085 μm < Dp< 16 μm). Tehnika mikrotalasne digestije korišćena je za razaranje sakupljenog depozita aerosolnih čestica iz šest krupnijih frakcija (0,27 μm < Dp< 16 μm). Koncentracije 25 ispitivanih elemenata su određene primenom indukovano spregnute plazme sa masenom spektrometrijom. Najzastupljeniji elementi u ispitivanom aerosolu su bili Ca, Fe, Al, K i Mg. Najveći procentualni udeo As, Cd, K, Pb i Sb bio je prisutan u frakcijama čestica finog moda, dok su u grubom modu dominirali Al, Ba, Ca, Cr, Fe, Mg, Mn i Ti. Naknadno je vršena i gama spektrometrijska analiza uzoraka. Jedan deo ispitivanja je obuhvatao merenje svake od 11 frakcija posebno, a drugi deo analizu svih 11 frakcija odjednom. Takođe, merene su i aktivnosti više različitih uzoraka iste frakcije. U spektru su nađeni u tragovima prirodni radionuklidi, dok radionuklidi veštačkog porekla nisu detektovani. U radu su diskutovane istražene korelacije dobijenih rezultata koncentracije aktivnosti radionuklida sa dominantnim elementarnim sastavom i dijametrom čestica, kao i moguće poreklo aerozagađenja.
AB  - The main sources of air pollution in Serbia are the energy sector, which includes thermal power plants, heating plants and individual heating of households, then the transport sector and industrial activity (oil refineries, chemical industry, mining, etc.). It is estimated that the number of premature deaths caused by air pollution in Serbia is among the highest in Europe. The most important parameters for monitoring are the concentration of particles and their size distribution. Sampling of suspended atmospheric particles (particulate matter - PM) fractionated by size was conducted in the period from March 2012 to December 2013 in the suburban part of Belgrade at the background measuring station Zeleno brdo, as a receptor site. Every sixth day, one averaged 48-hour sample of aerosol particles was taken, separated into eleven intervals of aerodynamic particle diameters (Dp) using a low-pressure cascade impactor prof. dr. Berner–LPI \25 /0.0085 /2. The microwave digestion technique was used to destroy the collected aerosol particle deposit from the six tested size ranges: 0.27 ≤ Dp ≤ 0.53 μm, 0.53 ≤ Dp ≤ 1.06 μm, 1.06 ≤ Dp ≤ 2.09 μm, 2.09 ≤ Dp ≤ 4.11 μm, 4.11 ≤ Dp ≤ 8.11 μm and 8.11≤ Dp ≤ 16 μm. Concentrations of 25 test elements were determined using induced conjugated plasma by mass spectrometry. The most common elements in the tested aerosol were Ca, Fe, Al, K and Mg. The highest percentage of As, Cd, K, Pb and Sb was present in the fractions of fine mode particles, while in the coarse mode Al, Ba, Ca, Cr, Fe, Mg, Mn and Ti dominated. Subsequently, gamma spectrometric analysis of the samples was performed. One part of the study included the measurement of each of the 11 fractions separately, and the other part the analysis of all 11 fractions at once. Also, the activities of several different samples of the same fraction were measured. Traces of natural radionuclides were found in the spectrum, while radionuclides of artificial origin were not detected. The paper discusses the investigated correlations of the obtained results of the activity concentrations of radionuclides with the dominant elemental composition and particle diameter, as well as the possible origin of air pollution.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska
T1  - Radioactivity Testing of Suspended Atmospheric Particles Sampled by Low Pressure Cascade Impactor
SP  - 92
EP  - 100
ER  - 
@conference{
author = "Forkapić, Sofija and Đorđević, Dragana and Đuričić-Milanković, Jelena and Čeliković, Igor T. and Kandić, Aleksandar and Hansman, Jan and Bikit, Kristina",
year = "2021",
abstract = "Glavni izvori aerozagađenja u Srbiji su energetski sektor u koji spadaju termoelektrane, toplane i pojedinačno grejanje domaćinstava, potom transportni sektor i industrijska aktivnost (rafinerije nafte, hemijska industrija, rudarstvo i sl.). Procenjeno je da je broj preranih smrti izazvanih aerozagađenjem u Srbiji, među najvećima u Evropi. Najvažniji parametri za praćenje su koncentracija čestica i njihova raspodela u veličini. Uzorkovanje suspendovanih čestica atmosfere (particulate matter - PM) frakcionisanih po veličini sprovedeno je u periodu od marta 2012. godine do decembra 2013. godine u suburbanom delu Beograda na pozadinskoj mernoj stanici Zeleno brdo, kao receptorskom mestu. Svaki šesti dan uziman je po jedan usrednjeni 48-časovni uzorak aerosolnih čestica razdvojenih na jedanaest intervala aerodinamičkih prečnika čestica (particle diameter - Dp) pomoću kaskadnog impaktora niskog pritiska prof. dr. Bernera - LPI 25/0,0085/2 u opsegu veličine čestica (0,0085 μm < Dp< 16 μm). Tehnika mikrotalasne digestije korišćena je za razaranje sakupljenog depozita aerosolnih čestica iz šest krupnijih frakcija (0,27 μm < Dp< 16 μm). Koncentracije 25 ispitivanih elemenata su određene primenom indukovano spregnute plazme sa masenom spektrometrijom. Najzastupljeniji elementi u ispitivanom aerosolu su bili Ca, Fe, Al, K i Mg. Najveći procentualni udeo As, Cd, K, Pb i Sb bio je prisutan u frakcijama čestica finog moda, dok su u grubom modu dominirali Al, Ba, Ca, Cr, Fe, Mg, Mn i Ti. Naknadno je vršena i gama spektrometrijska analiza uzoraka. Jedan deo ispitivanja je obuhvatao merenje svake od 11 frakcija posebno, a drugi deo analizu svih 11 frakcija odjednom. Takođe, merene su i aktivnosti više različitih uzoraka iste frakcije. U spektru su nađeni u tragovima prirodni radionuklidi, dok radionuklidi veštačkog porekla nisu detektovani. U radu su diskutovane istražene korelacije dobijenih rezultata koncentracije aktivnosti radionuklida sa dominantnim elementarnim sastavom i dijametrom čestica, kao i moguće poreklo aerozagađenja., The main sources of air pollution in Serbia are the energy sector, which includes thermal power plants, heating plants and individual heating of households, then the transport sector and industrial activity (oil refineries, chemical industry, mining, etc.). It is estimated that the number of premature deaths caused by air pollution in Serbia is among the highest in Europe. The most important parameters for monitoring are the concentration of particles and their size distribution. Sampling of suspended atmospheric particles (particulate matter - PM) fractionated by size was conducted in the period from March 2012 to December 2013 in the suburban part of Belgrade at the background measuring station Zeleno brdo, as a receptor site. Every sixth day, one averaged 48-hour sample of aerosol particles was taken, separated into eleven intervals of aerodynamic particle diameters (Dp) using a low-pressure cascade impactor prof. dr. Berner–LPI \25 /0.0085 /2. The microwave digestion technique was used to destroy the collected aerosol particle deposit from the six tested size ranges: 0.27 ≤ Dp ≤ 0.53 μm, 0.53 ≤ Dp ≤ 1.06 μm, 1.06 ≤ Dp ≤ 2.09 μm, 2.09 ≤ Dp ≤ 4.11 μm, 4.11 ≤ Dp ≤ 8.11 μm and 8.11≤ Dp ≤ 16 μm. Concentrations of 25 test elements were determined using induced conjugated plasma by mass spectrometry. The most common elements in the tested aerosol were Ca, Fe, Al, K and Mg. The highest percentage of As, Cd, K, Pb and Sb was present in the fractions of fine mode particles, while in the coarse mode Al, Ba, Ca, Cr, Fe, Mg, Mn and Ti dominated. Subsequently, gamma spectrometric analysis of the samples was performed. One part of the study included the measurement of each of the 11 fractions separately, and the other part the analysis of all 11 fractions at once. Also, the activities of several different samples of the same fraction were measured. Traces of natural radionuclides were found in the spectrum, while radionuclides of artificial origin were not detected. The paper discusses the investigated correlations of the obtained results of the activity concentrations of radionuclides with the dominant elemental composition and particle diameter, as well as the possible origin of air pollution.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska, Radioactivity Testing of Suspended Atmospheric Particles Sampled by Low Pressure Cascade Impactor",
pages = "92-100"
}
Forkapić, S., Đorđević, D., Đuričić-Milanković, J., Čeliković, I. T., Kandić, A., Hansman, J.,& Bikit, K.. (2021). Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 92-100.
Forkapić S, Đorđević D, Đuričić-Milanković J, Čeliković IT, Kandić A, Hansman J, Bikit K. Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:92-100..
Forkapić, Sofija, Đorđević, Dragana, Đuričić-Milanković, Jelena, Čeliković, Igor T., Kandić, Aleksandar, Hansman, Jan, Bikit, Kristina, "Ispitivanje radioaktivnosti suspendovanih čestica atmosfere uzorkovanih kaskadnim impaktorom niskog pritiska" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):92-100.

Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes

Nikolić, Nebojša D.; Maksimović, Vesna; Avramović, Ljiljana

(2021)

TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Maksimović, Vesna
AU  - Avramović, Ljiljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9820
AB  - In this review paper, morphologies of metal powders produced by the constant (potentiostaticand galvanostatic) regimes of electrolysis from aqueous electrolytes are correlated withtheir crystal structure at the semiquantitative level. The main parameters affecting the shape ofpowder particles are the exchange current density (rate of electrochemical process) and overpotential for hydrogen evolution reaction. Depending on them, various shapes of dendrites (the needles, the two-dimensional (2D) fern-like, and the three-dimensional (3D) pine-like dendrites), and the particles formed under vigorous hydrogen evolution (cauliflower-like and spongy-like particles) are produced by these regimes of electrolysis. By decreasing the exchange current density value, the crystal structure of the powder particles is changed from the strong (111) preferred orientation obtained for the needle-like (silver) and the 2D (lead) dendrites to the randomly orientated crystallites in particles with the spherical morphology (the 3D dendrites and the cauliflower-like and the spongylike particles). The formation of metal powders by molten salt electrolysis and by electrolysis in deep eutectic solvents (DESs) and the crystallographic aspects of dendritic growth are also mentioned in this review.
T2  - Metals
T1  - Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes
VL  - 11
IS  - 6
SP  - 859
DO  - 10.3390/met11060859
ER  - 
@article{
author = "Nikolić, Nebojša D. and Maksimović, Vesna and Avramović, Ljiljana",
year = "2021",
abstract = "In this review paper, morphologies of metal powders produced by the constant (potentiostaticand galvanostatic) regimes of electrolysis from aqueous electrolytes are correlated withtheir crystal structure at the semiquantitative level. The main parameters affecting the shape ofpowder particles are the exchange current density (rate of electrochemical process) and overpotential for hydrogen evolution reaction. Depending on them, various shapes of dendrites (the needles, the two-dimensional (2D) fern-like, and the three-dimensional (3D) pine-like dendrites), and the particles formed under vigorous hydrogen evolution (cauliflower-like and spongy-like particles) are produced by these regimes of electrolysis. By decreasing the exchange current density value, the crystal structure of the powder particles is changed from the strong (111) preferred orientation obtained for the needle-like (silver) and the 2D (lead) dendrites to the randomly orientated crystallites in particles with the spherical morphology (the 3D dendrites and the cauliflower-like and the spongylike particles). The formation of metal powders by molten salt electrolysis and by electrolysis in deep eutectic solvents (DESs) and the crystallographic aspects of dendritic growth are also mentioned in this review.",
journal = "Metals",
title = "Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes",
volume = "11",
number = "6",
pages = "859",
doi = "10.3390/met11060859"
}
Nikolić, N. D., Maksimović, V.,& Avramović, L.. (2021). Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes. in Metals, 11(6), 859.
https://doi.org/10.3390/met11060859
Nikolić ND, Maksimović V, Avramović L. Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes. in Metals. 2021;11(6):859.
doi:10.3390/met11060859 .
Nikolić, Nebojša D., Maksimović, Vesna, Avramović, Ljiljana, "Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes" in Metals, 11, no. 6 (2021):859,
https://doi.org/10.3390/met11060859 . .
2
2
1

Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties

Mirković, Miljana; Kljajević, Ljiljana; Dolenec, Sabina; Nenadović, Miloš; Pavlović, Vladimir B.; Rajačić, Milica; Nenadović, Snežana

(2021)

TY  - JOUR
AU  - Mirković, Miljana
AU  - Kljajević, Ljiljana
AU  - Dolenec, Sabina
AU  - Nenadović, Miloš
AU  - Pavlović, Vladimir B.
AU  - Rajačić, Milica
AU  - Nenadović, Snežana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10092
AB  - Since recycled technologies usage is mandatory for environmental safety, and in this regard, it is important to examine new materials that can be used in construction and are primarily produced from fly ash. In addition to characteristics such as hardness and compressive strength, the given materials must also be radiologically and environmentally safe. The main concept of engineered geopolymer gel composites based on fly ash residues is focused on developing binder materials via gel formation processes that can replace ordinary cement materials. This study is unique in researching the potential use of fly ash from the Nikola Tesla thermal power plant in Serbia, where the hybrid geopolymeric materials synthesized from fly ash are experimentally examined with the addition 1 wt% and 2 wt% of polyvinyl alcohol (PVA). This paper aims to investigate the structural, morphological, mechanical, and radiological properties of hybrid materials with the addition of PVA and without additive in the period of ageing for 28 days at room temperature. The phase composition was investigated using X-ray powder diffraction (XRPD) analysis, while morphological characteristics of these materials were examined using scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDS). Vibrational spectra of obtained samples are investigated using diffuse reflectance infrared Fourier transform (DRIFT) and Fourier transform infrared (FTIR) techniques. The hardness and compressive strength are also examined, indicating that the 1 wt% addition in geopolymeric matrix results in the best mechanical properties. Radiological measurements of investigated all geopolymer samples show decreasing activity concentrations of radionuclides for 50% compared to fly ash.
T2  - Gels
T1  - Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties
VL  - 7
IS  - 4
SP  - 270
DO  - 10.3390/gels7040270
ER  - 
@article{
author = "Mirković, Miljana and Kljajević, Ljiljana and Dolenec, Sabina and Nenadović, Miloš and Pavlović, Vladimir B. and Rajačić, Milica and Nenadović, Snežana",
year = "2021",
abstract = "Since recycled technologies usage is mandatory for environmental safety, and in this regard, it is important to examine new materials that can be used in construction and are primarily produced from fly ash. In addition to characteristics such as hardness and compressive strength, the given materials must also be radiologically and environmentally safe. The main concept of engineered geopolymer gel composites based on fly ash residues is focused on developing binder materials via gel formation processes that can replace ordinary cement materials. This study is unique in researching the potential use of fly ash from the Nikola Tesla thermal power plant in Serbia, where the hybrid geopolymeric materials synthesized from fly ash are experimentally examined with the addition 1 wt% and 2 wt% of polyvinyl alcohol (PVA). This paper aims to investigate the structural, morphological, mechanical, and radiological properties of hybrid materials with the addition of PVA and without additive in the period of ageing for 28 days at room temperature. The phase composition was investigated using X-ray powder diffraction (XRPD) analysis, while morphological characteristics of these materials were examined using scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDS). Vibrational spectra of obtained samples are investigated using diffuse reflectance infrared Fourier transform (DRIFT) and Fourier transform infrared (FTIR) techniques. The hardness and compressive strength are also examined, indicating that the 1 wt% addition in geopolymeric matrix results in the best mechanical properties. Radiological measurements of investigated all geopolymer samples show decreasing activity concentrations of radionuclides for 50% compared to fly ash.",
journal = "Gels",
title = "Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties",
volume = "7",
number = "4",
pages = "270",
doi = "10.3390/gels7040270"
}
Mirković, M., Kljajević, L., Dolenec, S., Nenadović, M., Pavlović, V. B., Rajačić, M.,& Nenadović, S.. (2021). Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties. in Gels, 7(4), 270.
https://doi.org/10.3390/gels7040270
Mirković M, Kljajević L, Dolenec S, Nenadović M, Pavlović VB, Rajačić M, Nenadović S. Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties. in Gels. 2021;7(4):270.
doi:10.3390/gels7040270 .
Mirković, Miljana, Kljajević, Ljiljana, Dolenec, Sabina, Nenadović, Miloš, Pavlović, Vladimir B., Rajačić, Milica, Nenadović, Snežana, "Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties" in Gels, 7, no. 4 (2021):270,
https://doi.org/10.3390/gels7040270 . .

Fabrication and characterization of high entropy pyrochlore ceramics

Matović, Branko; Zagorac, Dejan; Cvijović-Alagić, Ivana; Zagorac, Jelena; Butulija, Svetlana; Erčić, Jelena; Hanzel, Ondrej; Sedlák, Richard; Lisnichuk, Maksym; Tatarko, Peter

(2021)

TY  - JOUR
AU  - Matović, Branko
AU  - Zagorac, Dejan
AU  - Cvijović-Alagić, Ivana
AU  - Zagorac, Jelena
AU  - Butulija, Svetlana
AU  - Erčić, Jelena
AU  - Hanzel, Ondrej
AU  - Sedlák, Richard
AU  - Lisnichuk, Maksym
AU  - Tatarko, Peter
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10083
AB  - High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450°C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as field assisted sintering technique (FAST) at 1450°C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2)Å and 10.5999(2)Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ∼0.7mm2/s for both sintering methods.ResumenSe fabricaron con éxito, mediante sinterización por plasma sin presión y por chispa, los circonatos de tierras raras (RE) de alta entropía con estructura de pirocloro. El compuesto RE2Zr2O7 con composición nominal (La0,2Y0,2Gd0,2Nd0,2Sm0,2)Zr2O7 se preparó mediante un procedimiento simple de nitrato de glicina (GNP). El proceso GNP produjo polvos con baja cristalinidad y después de la posterior calcinación, se formaron cerámicas bien cristalinas. Durante la calcinación coexisten estructuras defectuosas de fluorita (F-RE2Zr2O7) y pirocloro cristalino (Py-RE2Zr2O7). La formación de pirocloro cristalino puro se produce después de la sinterización a 1.450°C. Después de la compactación de polvos y sin presión (PS), así como por la técnica de sinterización asistida en campo (FAST) a 1.450 oC, se obtuvieron cerámicas de alta densidad, libres de aditivos. Se realizaron investigaciones teóricas de los sistemas de pirocloro RE2Zr2O7 de alta entropía. El parámetro de celda unitaria del Py-RE2Zr2O7 obtenido es 105.892(2) Å y 105.999(2) Å para la sinterización PS y FAST, respectivamente, lo que está de acuerdo con los resultados de los cálculos de la teoría funcional de la densidad (DFT). La difusividad térmica de las muestras sinterizadas a temperatura ambiente fue de ∼ 0,7 mm2/s para ambos métodos de sinterización.
T2  - Boletín de la Sociedad Española de Cerámica y Vidrio
T1  - Fabrication and characterization of high entropy pyrochlore ceramics
DO  - 10.1016/j.bsecv.2021.11.002
ER  - 
@article{
author = "Matović, Branko and Zagorac, Dejan and Cvijović-Alagić, Ivana and Zagorac, Jelena and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlák, Richard and Lisnichuk, Maksym and Tatarko, Peter",
year = "2021",
abstract = "High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450°C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as field assisted sintering technique (FAST) at 1450°C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2)Å and 10.5999(2)Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ∼0.7mm2/s for both sintering methods.ResumenSe fabricaron con éxito, mediante sinterización por plasma sin presión y por chispa, los circonatos de tierras raras (RE) de alta entropía con estructura de pirocloro. El compuesto RE2Zr2O7 con composición nominal (La0,2Y0,2Gd0,2Nd0,2Sm0,2)Zr2O7 se preparó mediante un procedimiento simple de nitrato de glicina (GNP). El proceso GNP produjo polvos con baja cristalinidad y después de la posterior calcinación, se formaron cerámicas bien cristalinas. Durante la calcinación coexisten estructuras defectuosas de fluorita (F-RE2Zr2O7) y pirocloro cristalino (Py-RE2Zr2O7). La formación de pirocloro cristalino puro se produce después de la sinterización a 1.450°C. Después de la compactación de polvos y sin presión (PS), así como por la técnica de sinterización asistida en campo (FAST) a 1.450 oC, se obtuvieron cerámicas de alta densidad, libres de aditivos. Se realizaron investigaciones teóricas de los sistemas de pirocloro RE2Zr2O7 de alta entropía. El parámetro de celda unitaria del Py-RE2Zr2O7 obtenido es 105.892(2) Å y 105.999(2) Å para la sinterización PS y FAST, respectivamente, lo que está de acuerdo con los resultados de los cálculos de la teoría funcional de la densidad (DFT). La difusividad térmica de las muestras sinterizadas a temperatura ambiente fue de ∼ 0,7 mm2/s para ambos métodos de sinterización.",
journal = "Boletín de la Sociedad Española de Cerámica y Vidrio",
title = "Fabrication and characterization of high entropy pyrochlore ceramics",
doi = "10.1016/j.bsecv.2021.11.002"
}
Matović, B., Zagorac, D., Cvijović-Alagić, I., Zagorac, J., Butulija, S., Erčić, J., Hanzel, O., Sedlák, R., Lisnichuk, M.,& Tatarko, P.. (2021). Fabrication and characterization of high entropy pyrochlore ceramics. in Boletín de la Sociedad Española de Cerámica y Vidrio.
https://doi.org/10.1016/j.bsecv.2021.11.002
Matović B, Zagorac D, Cvijović-Alagić I, Zagorac J, Butulija S, Erčić J, Hanzel O, Sedlák R, Lisnichuk M, Tatarko P. Fabrication and characterization of high entropy pyrochlore ceramics. in Boletín de la Sociedad Española de Cerámica y Vidrio. 2021;.
doi:10.1016/j.bsecv.2021.11.002 .
Matović, Branko, Zagorac, Dejan, Cvijović-Alagić, Ivana, Zagorac, Jelena, Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlák, Richard, Lisnichuk, Maksym, Tatarko, Peter, "Fabrication and characterization of high entropy pyrochlore ceramics" in Boletín de la Sociedad Española de Cerámica y Vidrio (2021),
https://doi.org/10.1016/j.bsecv.2021.11.002 . .
1

Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida

Sarap, Nataša; Janković, Marija M.; Rajačić, Milica; Krneta-Nikolić, Jelena D.; Todorović, Dragana; Vukanac, Ivana; Pantelić, Gordana K.

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Sarap, Nataša
AU  - Janković, Marija M.
AU  - Rajačić, Milica
AU  - Krneta-Nikolić, Jelena D.
AU  - Todorović, Dragana
AU  - Vukanac, Ivana
AU  - Pantelić, Gordana K.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9997
AB  - Istraživanja obuhvaćena ovom studijom predstavljaju prikaz efekata svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida, 90Sr i 137Cs. Za potrebe ovog rada, izvršeno je uzorkovanje obradivog zemljišta na dve dubine na teritoriji grada Beograda tokom 2014. godine. U uzorcima zemljišta su određene fizičko−hemijske osobine i specifične aktivnosti ispitanih radionuklida. Radiohemijska analitička metoda je primenjena za određivanje sadržaja 90Sr, dok je specifična aktivnost 137Cs određena primenom gamaspektrometrijske metode. Ispitivanje efekata svojstava analiziranih uzoraka obradivog zemljišta na migraciju 90Sr i 137Cs, izvršeno je statističkim metodama analize. Primenom linearne korelacione analize utvrđeni su dominantni fizičko−hemijski parametri koji utiču na migraciju 90Sr i 137Cs u poljoprivrednom zemljištu.
AB  - The research included by this study presents the effects of soil properties of different agricultural concepts to the migration of anthropogenic radionuclides, 90Sr and 137Cs. For the purposes of this paper, sampling of agricultural soil at two depths on the territory of the city of Belgrade during 2014 was performed. The physico−chemical properties of investigated soil, as well as the specific activities of the mentioned radionuclides were determined. The radiochemical analytical method was used to determine the 90Sr content, while the specific activity of 137Cs was determined using the gamma spectrometric method. Examination of the effects of soil properties on the migration of anthropogenic radionuclides 90Sr and 137Cs, based on the analyzed soil samples, was performed by statistical methods of analysis. By applying linear correlation analysis, the dominant physico−chemical parameters that affect the migration of 90Sr and 137Cs in agricultural soil were determined.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida
T1  - Effects of Soil Properties of Different Agricultural Concepts to Migration of the Artificial Radionuclides
SP  - 19
EP  - 26
ER  - 
@conference{
author = "Sarap, Nataša and Janković, Marija M. and Rajačić, Milica and Krneta-Nikolić, Jelena D. and Todorović, Dragana and Vukanac, Ivana and Pantelić, Gordana K.",
year = "2021",
abstract = "Istraživanja obuhvaćena ovom studijom predstavljaju prikaz efekata svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida, 90Sr i 137Cs. Za potrebe ovog rada, izvršeno je uzorkovanje obradivog zemljišta na dve dubine na teritoriji grada Beograda tokom 2014. godine. U uzorcima zemljišta su određene fizičko−hemijske osobine i specifične aktivnosti ispitanih radionuklida. Radiohemijska analitička metoda je primenjena za određivanje sadržaja 90Sr, dok je specifična aktivnost 137Cs određena primenom gamaspektrometrijske metode. Ispitivanje efekata svojstava analiziranih uzoraka obradivog zemljišta na migraciju 90Sr i 137Cs, izvršeno je statističkim metodama analize. Primenom linearne korelacione analize utvrđeni su dominantni fizičko−hemijski parametri koji utiču na migraciju 90Sr i 137Cs u poljoprivrednom zemljištu., The research included by this study presents the effects of soil properties of different agricultural concepts to the migration of anthropogenic radionuclides, 90Sr and 137Cs. For the purposes of this paper, sampling of agricultural soil at two depths on the territory of the city of Belgrade during 2014 was performed. The physico−chemical properties of investigated soil, as well as the specific activities of the mentioned radionuclides were determined. The radiochemical analytical method was used to determine the 90Sr content, while the specific activity of 137Cs was determined using the gamma spectrometric method. Examination of the effects of soil properties on the migration of anthropogenic radionuclides 90Sr and 137Cs, based on the analyzed soil samples, was performed by statistical methods of analysis. By applying linear correlation analysis, the dominant physico−chemical parameters that affect the migration of 90Sr and 137Cs in agricultural soil were determined.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida, Effects of Soil Properties of Different Agricultural Concepts to Migration of the Artificial Radionuclides",
pages = "19-26"
}
Sarap, N., Janković, M. M., Rajačić, M., Krneta-Nikolić, J. D., Todorović, D., Vukanac, I.,& Pantelić, G. K.. (2021). Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 19-26.
Sarap N, Janković MM, Rajačić M, Krneta-Nikolić JD, Todorović D, Vukanac I, Pantelić GK. Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:19-26..
Sarap, Nataša, Janković, Marija M., Rajačić, Milica, Krneta-Nikolić, Jelena D., Todorović, Dragana, Vukanac, Ivana, Pantelić, Gordana K., "Efekti svojstava tla različitih poljoprivrednih koncepata na migraciju antropogenih radionuklida" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):19-26.

Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo

Todorović, Dragana; Rajačić, Milica; Krneta-Nikolić, Jelena D.; Janković, Marija M.; Vukanac, Ivana; Pantelić, Gordana K.; Sarap, Nataša

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta-Nikolić, Jelena D.
AU  - Janković, Marija M.
AU  - Vukanac, Ivana
AU  - Pantelić, Gordana K.
AU  - Sarap, Nataša
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9998
AB  - Rezultati merenja radioaktivnosti zemljišta, mulja i vode u procesu iskopavanja bunara do maksimalne dubine od 13,5 m u selu Poganovu, u opštini Dimitrovgrad, prikazani su u ovom radu. Uzorci mulja i zemljišta, analizirani su spektrometrijom gama emitera i određivanjem sadržaja 90Sr. U slučaju uzorka vode, određena je ukupna alfa i ukupna beta aktivnost, i koncentracija radionuklida gama emitera. Pored navedenih uzoraka, sa iste lokacije su mereni i uzorci mahovina i lišajeva. Osim u uzorku mahovine i zemljišta sa dubine 0-10 cm u kojima je detektovano prisustvo 137Cs u veoma niskim koncentracijama za ovu vrstu uzoraka, ni u jednom uzorku nije detektovano prisustvo proizvedenih radionuklida, 137Cs i 90Sr. U slučaju prirodnih radionuklida, dobijene vrednosti koncentracija, karakteristične su za ovakve vrste uzoraka i ne razlikuju se u odnosu na druge lokacije na našim prostorima. Svi rezultati merenja ukazuju na to da se ova lokacija može koristiti kao nulta tačka monitoringa radioaktivnosti na našim prostorima.
AB  - The results of radioactivity measurements in the soil, sludge and water samples in the process of finding water and digging wells to a maximum depth of 13.5 m, in the village of Poganovo, in the municipality of Dimitrovgrad, are presented in this paper. Sludge and soil samples were analyzed by gamma-ray spectrometry and 90Sr measurements. In the case of water samples, gross alpha and gross beta activity, as well as content of radionuclides gamma emitter were determined. In addition, samples of mosses and lichens from the same location were also measured. Presence of the artificial radionuclides 90Sr and 137Cs were not detected in measured samples, with an exception of the sample of moss and soil from a depth of 0-10 cm, where 137Cs was detected in very low concentrations for this type of samples. In the case of natural radionuclides, the obtained values of concentrations are characteristic of these types of samples and do not differ from other locations in our area. All measurement results indicate that this location can be used as a zero point for monitoring radioactivity in our area.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo
T1  - Radioactivity of the Environment in the Process of Excavation of Wells - Village Poganovo
SP  - 32
EP  - 37
ER  - 
@conference{
author = "Todorović, Dragana and Rajačić, Milica and Krneta-Nikolić, Jelena D. and Janković, Marija M. and Vukanac, Ivana and Pantelić, Gordana K. and Sarap, Nataša",
year = "2021",
abstract = "Rezultati merenja radioaktivnosti zemljišta, mulja i vode u procesu iskopavanja bunara do maksimalne dubine od 13,5 m u selu Poganovu, u opštini Dimitrovgrad, prikazani su u ovom radu. Uzorci mulja i zemljišta, analizirani su spektrometrijom gama emitera i određivanjem sadržaja 90Sr. U slučaju uzorka vode, određena je ukupna alfa i ukupna beta aktivnost, i koncentracija radionuklida gama emitera. Pored navedenih uzoraka, sa iste lokacije su mereni i uzorci mahovina i lišajeva. Osim u uzorku mahovine i zemljišta sa dubine 0-10 cm u kojima je detektovano prisustvo 137Cs u veoma niskim koncentracijama za ovu vrstu uzoraka, ni u jednom uzorku nije detektovano prisustvo proizvedenih radionuklida, 137Cs i 90Sr. U slučaju prirodnih radionuklida, dobijene vrednosti koncentracija, karakteristične su za ovakve vrste uzoraka i ne razlikuju se u odnosu na druge lokacije na našim prostorima. Svi rezultati merenja ukazuju na to da se ova lokacija može koristiti kao nulta tačka monitoringa radioaktivnosti na našim prostorima., The results of radioactivity measurements in the soil, sludge and water samples in the process of finding water and digging wells to a maximum depth of 13.5 m, in the village of Poganovo, in the municipality of Dimitrovgrad, are presented in this paper. Sludge and soil samples were analyzed by gamma-ray spectrometry and 90Sr measurements. In the case of water samples, gross alpha and gross beta activity, as well as content of radionuclides gamma emitter were determined. In addition, samples of mosses and lichens from the same location were also measured. Presence of the artificial radionuclides 90Sr and 137Cs were not detected in measured samples, with an exception of the sample of moss and soil from a depth of 0-10 cm, where 137Cs was detected in very low concentrations for this type of samples. In the case of natural radionuclides, the obtained values of concentrations are characteristic of these types of samples and do not differ from other locations in our area. All measurement results indicate that this location can be used as a zero point for monitoring radioactivity in our area.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo, Radioactivity of the Environment in the Process of Excavation of Wells - Village Poganovo",
pages = "32-37"
}
Todorović, D., Rajačić, M., Krneta-Nikolić, J. D., Janković, M. M., Vukanac, I., Pantelić, G. K.,& Sarap, N.. (2021). Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 32-37.
Todorović D, Rajačić M, Krneta-Nikolić JD, Janković MM, Vukanac I, Pantelić GK, Sarap N. Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:32-37..
Todorović, Dragana, Rajačić, Milica, Krneta-Nikolić, Jelena D., Janković, Marija M., Vukanac, Ivana, Pantelić, Gordana K., Sarap, Nataša, "Radioaktivnost okoline u procesu iskopavanja bunara - selo Poganovo" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):32-37.

Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke

Janković, Marija M.; Rajačić, Milica; Krneta-Nikolić, Jelena D.; Vukanac, Ivana; Todorović, Dragana; Pantelić, Gordana K.; Sarap, Nataša

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Janković, Marija M.
AU  - Rajačić, Milica
AU  - Krneta-Nikolić, Jelena D.
AU  - Vukanac, Ivana
AU  - Todorović, Dragana
AU  - Pantelić, Gordana K.
AU  - Sarap, Nataša
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9999
AB  - U radu su prikazani rezultati merenja radioaktivnosti u izvorskim vodama u okolini Smederevske Palanke. Određivanje sadržaja radionuklida urađeno je gamaspektrometrijskom metodom sa HPGe detektorom, dok je za merenje ukupne alfa i ukupne beta aktivnosti u uzorcima korišćen gasni proporcionalni alfa beta brojač THERMO-EBERLINE FHT 770T. Uzorci su sakupljani tokom proleća 2021. godine. Dobijeni rezultati upoređeni su sa dozvoljenim vrednostima sadržaja radionuklida u vodi za piće propisanim Zakonskom regulativom.
AB  - The results of gamma spectrometric analysis and determination of gross alpha and gross beta activity in spring waters in the vicinity of Smederevska Palanka are presented in this paper. Determination of radionuclide content was performed with HPGe gamma spectrometry, while determination of gross alpha and gross beta activity was performed using gas proportional alpha/beta counter THERMO-EBERLINE FHT 770T. Samples were collected in spring of 2021. The obtained results were compared with the permitted values of radionuclide content in drinking water prescribed by the Legislation.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke
T1  - Content of Radionuclides in Spring Waters in the Vicinity of Smederevska Palanka
SP  - 82
EP  - 86
ER  - 
@conference{
author = "Janković, Marija M. and Rajačić, Milica and Krneta-Nikolić, Jelena D. and Vukanac, Ivana and Todorović, Dragana and Pantelić, Gordana K. and Sarap, Nataša",
year = "2021",
abstract = "U radu su prikazani rezultati merenja radioaktivnosti u izvorskim vodama u okolini Smederevske Palanke. Određivanje sadržaja radionuklida urađeno je gamaspektrometrijskom metodom sa HPGe detektorom, dok je za merenje ukupne alfa i ukupne beta aktivnosti u uzorcima korišćen gasni proporcionalni alfa beta brojač THERMO-EBERLINE FHT 770T. Uzorci su sakupljani tokom proleća 2021. godine. Dobijeni rezultati upoređeni su sa dozvoljenim vrednostima sadržaja radionuklida u vodi za piće propisanim Zakonskom regulativom., The results of gamma spectrometric analysis and determination of gross alpha and gross beta activity in spring waters in the vicinity of Smederevska Palanka are presented in this paper. Determination of radionuclide content was performed with HPGe gamma spectrometry, while determination of gross alpha and gross beta activity was performed using gas proportional alpha/beta counter THERMO-EBERLINE FHT 770T. Samples were collected in spring of 2021. The obtained results were compared with the permitted values of radionuclide content in drinking water prescribed by the Legislation.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke, Content of Radionuclides in Spring Waters in the Vicinity of Smederevska Palanka",
pages = "82-86"
}
Janković, M. M., Rajačić, M., Krneta-Nikolić, J. D., Vukanac, I., Todorović, D., Pantelić, G. K.,& Sarap, N.. (2021). Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 82-86.
Janković MM, Rajačić M, Krneta-Nikolić JD, Vukanac I, Todorović D, Pantelić GK, Sarap N. Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:82-86..
Janković, Marija M., Rajačić, Milica, Krneta-Nikolić, Jelena D., Vukanac, Ivana, Todorović, Dragana, Pantelić, Gordana K., Sarap, Nataša, "Sadržaj radionuklida u izvorskim vodama u okolini Smederevske Palanke" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):82-86.

Sistematsko ispitivanje koncentracije radona na teritoriji Beograda

Rajačić, Milica; Todorović, Dragana; Krneta-Nikolić, Jelena D.; Pantelić, Gordana K.; Vukanac, Ivana; Janković, Marija M.; Sarap, Nataša

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Rajačić, Milica
AU  - Todorović, Dragana
AU  - Krneta-Nikolić, Jelena D.
AU  - Pantelić, Gordana K.
AU  - Vukanac, Ivana
AU  - Janković, Marija M.
AU  - Sarap, Nataša
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10008
AB  - Programom sistematskog ispitivanja nivoa radioaktivnosti u životnoj sredini na teritoriji Beograda predviđeno je merenje koncentracije radona (222Rn) u stambenim objektima, školskim i predškolskim ustanovama. Laboratorija "Zaštita", Instituta za nuklearne nauke "Vinča" je u periodu 2016-2020. izvršila ispitivanja u 547 prostorija (99 u stambenim objektima, 341 u školskim ustanovama i 107 u predškolskim jedinicama). Prosečna koncentracija 222Rn je iznosila 105 Bq/m3, a koncentarcija ispod 100 Bq/m3 je izmerena u 76,60 % prostorija. Vrednost od 400 Bq/m3 je prekoračena u 4,94 % prostorija. Od 15 beogradskih opština, koliko je pokriveno ovim istraživanjem, u 8 je detektovana koncentracija iznad 400 Bq/m3. Maksimalna izmerena vrednost u stambenim objektima je iznosila 3550 Bq/m3, dok je u vaspitno-obrazovnim ustanovama najveća detektovana koncentracija bila 1910 Bq/m3.
AB  - The program of the level of radioactivity in the environment monitoring on the territory of Belgrade envisages measuring the concentration of radon in residential buildings, schools and kindergartens. The Department of Radiation and Environmental Protection of the Institute of Nuclear Sciences "Vinca" conducted examination in 547 rooms (99 in residential buildings, 341 in schools and 107 in kindergartens) in the period 2016-2020. The average concentration of 222Rn is 105 Bq/m3, and the concentration below 100 Bq/m3 was measured in 76.60 % of the rooms. The value of 400 Bq/m3 was exceeded in 4.94 % of the rooms. Out of 15 Belgrade municipalities covered by this research, a concentration above 400 Bq/m3 was detected in 8 municipalities. The maximum measured value in residential buildings was 3550 Bq/m3, while in educational institutions the highest detected concentration was 1910 Bq/m3.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Sistematsko ispitivanje koncentracije radona na teritoriji Beograda
T1  - Systematic Investigation of Radon Concentration on the Territory of Belgrade
SP  - 128
EP  - 133
ER  - 
@conference{
author = "Rajačić, Milica and Todorović, Dragana and Krneta-Nikolić, Jelena D. and Pantelić, Gordana K. and Vukanac, Ivana and Janković, Marija M. and Sarap, Nataša",
year = "2021",
abstract = "Programom sistematskog ispitivanja nivoa radioaktivnosti u životnoj sredini na teritoriji Beograda predviđeno je merenje koncentracije radona (222Rn) u stambenim objektima, školskim i predškolskim ustanovama. Laboratorija "Zaštita", Instituta za nuklearne nauke "Vinča" je u periodu 2016-2020. izvršila ispitivanja u 547 prostorija (99 u stambenim objektima, 341 u školskim ustanovama i 107 u predškolskim jedinicama). Prosečna koncentracija 222Rn je iznosila 105 Bq/m3, a koncentarcija ispod 100 Bq/m3 je izmerena u 76,60 % prostorija. Vrednost od 400 Bq/m3 je prekoračena u 4,94 % prostorija. Od 15 beogradskih opština, koliko je pokriveno ovim istraživanjem, u 8 je detektovana koncentracija iznad 400 Bq/m3. Maksimalna izmerena vrednost u stambenim objektima je iznosila 3550 Bq/m3, dok je u vaspitno-obrazovnim ustanovama najveća detektovana koncentracija bila 1910 Bq/m3., The program of the level of radioactivity in the environment monitoring on the territory of Belgrade envisages measuring the concentration of radon in residential buildings, schools and kindergartens. The Department of Radiation and Environmental Protection of the Institute of Nuclear Sciences "Vinca" conducted examination in 547 rooms (99 in residential buildings, 341 in schools and 107 in kindergartens) in the period 2016-2020. The average concentration of 222Rn is 105 Bq/m3, and the concentration below 100 Bq/m3 was measured in 76.60 % of the rooms. The value of 400 Bq/m3 was exceeded in 4.94 % of the rooms. Out of 15 Belgrade municipalities covered by this research, a concentration above 400 Bq/m3 was detected in 8 municipalities. The maximum measured value in residential buildings was 3550 Bq/m3, while in educational institutions the highest detected concentration was 1910 Bq/m3.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Sistematsko ispitivanje koncentracije radona na teritoriji Beograda, Systematic Investigation of Radon Concentration on the Territory of Belgrade",
pages = "128-133"
}
Rajačić, M., Todorović, D., Krneta-Nikolić, J. D., Pantelić, G. K., Vukanac, I., Janković, M. M.,& Sarap, N.. (2021). Sistematsko ispitivanje koncentracije radona na teritoriji Beograda. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 128-133.
Rajačić M, Todorović D, Krneta-Nikolić JD, Pantelić GK, Vukanac I, Janković MM, Sarap N. Sistematsko ispitivanje koncentracije radona na teritoriji Beograda. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:128-133..
Rajačić, Milica, Todorović, Dragana, Krneta-Nikolić, Jelena D., Pantelić, Gordana K., Vukanac, Ivana, Janković, Marija M., Sarap, Nataša, "Sistematsko ispitivanje koncentracije radona na teritoriji Beograda" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):128-133.

Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti

Vukanac, Ivana; Rajačić, Milica; Andrić, Velibor; Krneta-Nikolić, Jelena D.; Todorović, Dragana; Pantelić, Gordana K.; Janković, Marija M.

(Institut za nuklearne nauke "Vinča", 2021)

TY  - CONF
AU  - Vukanac, Ivana
AU  - Rajačić, Milica
AU  - Andrić, Velibor
AU  - Krneta-Nikolić, Jelena D.
AU  - Todorović, Dragana
AU  - Pantelić, Gordana K.
AU  - Janković, Marija M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10010
AB  - Prema važećoj zakonskoj regulativi u Republici Srbiji kontrola radiološke ispravnosti otpadnih materijala vrši se na graničnim prelazima, kao i kada postoji namera odlaganja u životnu sredinu. Sadržaj radionuklida u otpadnim materijalima u najvećem broju slučajeva odredjuje se gamaspektrometrijskim ispitivanjem. Ova merenja podrazumevaju adekvatnu pripremu uzorka u cilju postizanja željene geometrije merenja za koju je izvršena kalibracija efikasnosti gama spektrometra. U postupku pripreme uzorka otpadnog materijala često nije moguće postići zadovoljavajuću homogenost. Takodje, matriks merenog materijala u većini slučajeva ne odgovara matriksu standarda pomoću kojeg je izvršena kalibracija spektrometra. Iz ovih razloga je potrebno izvršiti odredjene korekcije rezultata merenja (transfer efikasnosti, na pr.), kao i proširenje budžeta merne nesigurnosti. U radu je detaljno prikazan postupak procene doprinosa nehomogenosti uzorka mernoj nesigurnosti, kao i doprinosa koji u budžet merne nesigurnosti unosi transfer efikasnosti i primena korekcionih faktora za koincidentno sumiranje.
AB  - According to the current legislation in the Republic of Serbia, the radiological control of waste materials is performed at border crossings, as well as when there is an intention to dispose these materials in the environment. The gamma ray spectrometry is commonly used for determination of radionuclide content in waste materials. These measurements imply adequate sample preparation in order to achieve the desired measurement geometry for which the efficiency of the gamma spectrometer has been calibrated. Satisfactory homogeneity is often not possible to achieve in the sample preparation process. Also, the matrix of the measured material in most cases does not correspond to the matrix of the standard used for efficiency calibration of the spectrometer. For these reasons, it is necessary to make certain corrections to the measurement results (efficiency transfer, for example), as well as to expand the measurement uncertainty budget. The paper presents in detail the procedure for assessing the contribution of inhomogeneity of the sample to the measurement uncertainty, as well as the contribution that the efficiency transfer and coincidence summing corrections introduce to the measurement uncertainty budget.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti
T1  - Testing of Radionuclide Activity in Waste Material - Measurement Uncertainty Budget
SP  - 162
EP  - 168
ER  - 
@conference{
author = "Vukanac, Ivana and Rajačić, Milica and Andrić, Velibor and Krneta-Nikolić, Jelena D. and Todorović, Dragana and Pantelić, Gordana K. and Janković, Marija M.",
year = "2021",
abstract = "Prema važećoj zakonskoj regulativi u Republici Srbiji kontrola radiološke ispravnosti otpadnih materijala vrši se na graničnim prelazima, kao i kada postoji namera odlaganja u životnu sredinu. Sadržaj radionuklida u otpadnim materijalima u najvećem broju slučajeva odredjuje se gamaspektrometrijskim ispitivanjem. Ova merenja podrazumevaju adekvatnu pripremu uzorka u cilju postizanja željene geometrije merenja za koju je izvršena kalibracija efikasnosti gama spektrometra. U postupku pripreme uzorka otpadnog materijala često nije moguće postići zadovoljavajuću homogenost. Takodje, matriks merenog materijala u većini slučajeva ne odgovara matriksu standarda pomoću kojeg je izvršena kalibracija spektrometra. Iz ovih razloga je potrebno izvršiti odredjene korekcije rezultata merenja (transfer efikasnosti, na pr.), kao i proširenje budžeta merne nesigurnosti. U radu je detaljno prikazan postupak procene doprinosa nehomogenosti uzorka mernoj nesigurnosti, kao i doprinosa koji u budžet merne nesigurnosti unosi transfer efikasnosti i primena korekcionih faktora za koincidentno sumiranje., According to the current legislation in the Republic of Serbia, the radiological control of waste materials is performed at border crossings, as well as when there is an intention to dispose these materials in the environment. The gamma ray spectrometry is commonly used for determination of radionuclide content in waste materials. These measurements imply adequate sample preparation in order to achieve the desired measurement geometry for which the efficiency of the gamma spectrometer has been calibrated. Satisfactory homogeneity is often not possible to achieve in the sample preparation process. Also, the matrix of the measured material in most cases does not correspond to the matrix of the standard used for efficiency calibration of the spectrometer. For these reasons, it is necessary to make certain corrections to the measurement results (efficiency transfer, for example), as well as to expand the measurement uncertainty budget. The paper presents in detail the procedure for assessing the contribution of inhomogeneity of the sample to the measurement uncertainty, as well as the contribution that the efficiency transfer and coincidence summing corrections introduce to the measurement uncertainty budget.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti, Testing of Radionuclide Activity in Waste Material - Measurement Uncertainty Budget",
pages = "162-168"
}
Vukanac, I., Rajačić, M., Andrić, V., Krneta-Nikolić, J. D., Todorović, D., Pantelić, G. K.,& Janković, M. M.. (2021). Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 162-168.
Vukanac I, Rajačić M, Andrić V, Krneta-Nikolić JD, Todorović D, Pantelić GK, Janković MM. Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:162-168..
Vukanac, Ivana, Rajačić, Milica, Andrić, Velibor, Krneta-Nikolić, Jelena D., Todorović, Dragana, Pantelić, Gordana K., Janković, Marija M., "Ispitivanje aktivnosti radionuklida u otpadnom materijalu – budžet merne nesigurnosti" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):162-168.