TY  - JOUR
AU  - Katnić, Đurica B.
AU  - Porobić, Slavica
AU  - Vujčić, Ivica
AU  - Kojić, Marija
AU  - Lazarević-Pašti, Tamara
AU  - Milanković, Vedran
AU  - Marinović-Cincović, Milena
AU  - Živojinović, Dragana Z.
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11863
AB  - Irradiated fig pomace pyrochar (IrrPyrFP) is noteworthy as a novel sterilized low-cost sorbent of BTEX, pesticides, and Pb2+ ions. It was produced by applying pyrolysis treatment followed by gamma irradiation modification in order to obtain a highly efficient and sterile sorbent. The characterization of fig pomace before and after pyrolysis, as well as before and after irradiation of the obtained pyrochar, was done using SEM, FTIR, and elemental analysis, while its sorption ability was tested through the removal of examined pollutants by batch sorption experiments. The obtained results suggest that IrrPyrFP could play a significant role in the control of environmental pollutants, as indicated by the maximum adsorption capacities: 42 mg g−1 for BTEX, 0.625 mg g−1 for malathion, 0.495 mg g−1 for chlorpyrifos and 255 mg g−1 for Pb2+. A kinetic study showed that the removal process by IrrPyrFP mainly follows pseudo 2nd kinetics order, while the sorption equilibriums were estimated using the Langmuir and Freundlich model. Overall, the findings of this work suggest that pyrolysis and activation by irradiation of waste biomass is a promising way to produce sterile efficient sorbents for waste-water treatment based on green chemistry. Additionally, the demonstrated application of fig pomace promotes the potential of using this biomass for continual and economical waste management in the rising fig industry.
T2  - Radiation Physics and Chemistry
T1  - Irradiated fig pomace pyrochar as a promising and sustainable sterilized sorbent for water pollutant removal
VL  - 214
SP  - 111277
DO  - 10.1016/j.radphyschem.2023.111277
ER  - 

@article{
author = "Katnić, Đurica B. and Porobić, Slavica and Vujčić, Ivica and Kojić, Marija and Lazarević-Pašti, Tamara and Milanković, Vedran and Marinović-Cincović, Milena and Živojinović, Dragana Z.",
year = "2024",
abstract = "Irradiated fig pomace pyrochar (IrrPyrFP) is noteworthy as a novel sterilized low-cost sorbent of BTEX, pesticides, and Pb2+ ions. It was produced by applying pyrolysis treatment followed by gamma irradiation modification in order to obtain a highly efficient and sterile sorbent. The characterization of fig pomace before and after pyrolysis, as well as before and after irradiation of the obtained pyrochar, was done using SEM, FTIR, and elemental analysis, while its sorption ability was tested through the removal of examined pollutants by batch sorption experiments. The obtained results suggest that IrrPyrFP could play a significant role in the control of environmental pollutants, as indicated by the maximum adsorption capacities: 42 mg g−1 for BTEX, 0.625 mg g−1 for malathion, 0.495 mg g−1 for chlorpyrifos and 255 mg g−1 for Pb2+. A kinetic study showed that the removal process by IrrPyrFP mainly follows pseudo 2nd kinetics order, while the sorption equilibriums were estimated using the Langmuir and Freundlich model. Overall, the findings of this work suggest that pyrolysis and activation by irradiation of waste biomass is a promising way to produce sterile efficient sorbents for waste-water treatment based on green chemistry. Additionally, the demonstrated application of fig pomace promotes the potential of using this biomass for continual and economical waste management in the rising fig industry.",
journal = "Radiation Physics and Chemistry",
title = "Irradiated fig pomace pyrochar as a promising and sustainable sterilized sorbent for water pollutant removal",
volume = "214",
pages = "111277",
doi = "10.1016/j.radphyschem.2023.111277"
}

Katnić, Đ. B., Porobić, S., Vujčić, I., Kojić, M., Lazarević-Pašti, T., Milanković, V., Marinović-Cincović, M.,& Živojinović, D. Z.. (2024). Irradiated fig pomace pyrochar as a promising and sustainable sterilized sorbent for water pollutant removal. in Radiation Physics and Chemistry, 214, 111277.
https://doi.org/10.1016/j.radphyschem.2023.111277

Katnić ĐB, Porobić S, Vujčić I, Kojić M, Lazarević-Pašti T, Milanković V, Marinović-Cincović M, Živojinović DZ. Irradiated fig pomace pyrochar as a promising and sustainable sterilized sorbent for water pollutant removal. in Radiation Physics and Chemistry. 2024;214:111277.
doi:10.1016/j.radphyschem.2023.111277 .

Katnić, Đurica B., Porobić, Slavica, Vujčić, Ivica, Kojić, Marija, Lazarević-Pašti, Tamara, Milanković, Vedran, Marinović-Cincović, Milena, Živojinović, Dragana Z., "Irradiated fig pomace pyrochar as a promising and sustainable sterilized sorbent for water pollutant removal" in Radiation Physics and Chemistry, 214 (2024):111277,
https://doi.org/10.1016/j.radphyschem.2023.111277 . .

TY  - CONF
AU  - Nikolić, Nataša
AU  - Porobić, Slavica
AU  - Tadić, Julijana
AU  - Vujčić, Ivica
AU  - Kojić, Marija
AU  - Lađarević, Jelena
AU  - Mijin, Dušan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12230
AB  - Polymeric materials are widely used in the chemical and optical industries, the packaging materials industry, and biomedicine. New technologies and the search for innovative and sustainable solutions have contributed to the development of polymer sensors and smart materials. Poly(vinyl-alcohol) (PVA) is a thermoplastic polymer soluble in water. It belongs to the group of non-toxic and completely biodegradable polymers, with excellent thermal and mechanical properties. Polymer-colored films have great potential as sensor systems, primarily due to their visual color change, which makes them easy to use. Azo dyes, which are used for coloring polymer films, represent the most important class of synthetic dyes, and their exceptional properties are reflected in high extinction coefficients, as well as excellent fastness to light and wet processing. Traditionally, azo dyes are used in the food and cosmetic industries, and are also used as pH indicators. In this work, in addition to the synthesis of azo pyridone dyes, polymeric films were also synthesized. The first series of films were synthesized based on PVA and newly synthesized azo dyes, and the sensory properties of the new films were tested. The second series of films were synthesized in order to test the films as dosimeters for γ-radiation, and for this reason, TTC was added to their synthesis. The dye used in the experiments were characterized by ATR-FTIR, NMR and UV-Vis spectra. The chemical structure of the synthesized films was analyzed by ATR-FTIR spectroscopy. The sensory properties of the film were tested in solutions of different pH values, while the possibility for application in dosimetry was tested at different doses of γ-radiation at the 60Co source. Changes in the color of the films were monitored spectrophotometrically by recording reflection spectra.
PB  - Niš : RAD Centre
C3  - RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
T1  - Sensory properties of new films based on poly(vinyl-alcohol) and pyridone azo dyes
SP  - 180
EP  - 180
DO  - 10.21175/rad.abstr.book.2023.32.10
ER  - 

@conference{
author = "Nikolić, Nataša and Porobić, Slavica and Tadić, Julijana and Vujčić, Ivica and Kojić, Marija and Lađarević, Jelena and Mijin, Dušan",
year = "2023",
abstract = "Polymeric materials are widely used in the chemical and optical industries, the packaging materials industry, and biomedicine. New technologies and the search for innovative and sustainable solutions have contributed to the development of polymer sensors and smart materials. Poly(vinyl-alcohol) (PVA) is a thermoplastic polymer soluble in water. It belongs to the group of non-toxic and completely biodegradable polymers, with excellent thermal and mechanical properties. Polymer-colored films have great potential as sensor systems, primarily due to their visual color change, which makes them easy to use. Azo dyes, which are used for coloring polymer films, represent the most important class of synthetic dyes, and their exceptional properties are reflected in high extinction coefficients, as well as excellent fastness to light and wet processing. Traditionally, azo dyes are used in the food and cosmetic industries, and are also used as pH indicators. In this work, in addition to the synthesis of azo pyridone dyes, polymeric films were also synthesized. The first series of films were synthesized based on PVA and newly synthesized azo dyes, and the sensory properties of the new films were tested. The second series of films were synthesized in order to test the films as dosimeters for γ-radiation, and for this reason, TTC was added to their synthesis. The dye used in the experiments were characterized by ATR-FTIR, NMR and UV-Vis spectra. The chemical structure of the synthesized films was analyzed by ATR-FTIR spectroscopy. The sensory properties of the film were tested in solutions of different pH values, while the possibility for application in dosimetry was tested at different doses of γ-radiation at the 60Co source. Changes in the color of the films were monitored spectrophotometrically by recording reflection spectra.",
publisher = "Niš : RAD Centre",
journal = "RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts",
title = "Sensory properties of new films based on poly(vinyl-alcohol) and pyridone azo dyes",
pages = "180-180",
doi = "10.21175/rad.abstr.book.2023.32.10"
}

Nikolić, N., Porobić, S., Tadić, J., Vujčić, I., Kojić, M., Lađarević, J.,& Mijin, D.. (2023). Sensory properties of new films based on poly(vinyl-alcohol) and pyridone azo dyes. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
Niš : RAD Centre., 180-180.
https://doi.org/10.21175/rad.abstr.book.2023.32.10

Nikolić N, Porobić S, Tadić J, Vujčić I, Kojić M, Lađarević J, Mijin D. Sensory properties of new films based on poly(vinyl-alcohol) and pyridone azo dyes. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts. 2023;:180-180.
doi:10.21175/rad.abstr.book.2023.32.10 .

Nikolić, Nataša, Porobić, Slavica, Tadić, Julijana, Vujčić, Ivica, Kojić, Marija, Lađarević, Jelena, Mijin, Dušan, "Sensory properties of new films based on poly(vinyl-alcohol) and pyridone azo dyes" in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts (2023):180-180,
https://doi.org/10.21175/rad.abstr.book.2023.32.10 . .

TY  - JOUR
AU  - Mališić, Vanja
AU  - Gajić, Vuk
AU  - Porobić, Slavica
AU  - Patarić, Aleksandra
AU  - Putić, Slaviša
AU  - Vujčić, Ivica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10683
AB  - Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.
T2  - Radiation Physics and Chemistry
T1  - The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing
VL  - 207
SP  - 110846
DO  - 10.1016/j.radphyschem.2023.110846
ER  - 

@article{
author = "Mališić, Vanja and Gajić, Vuk and Porobić, Slavica and Patarić, Aleksandra and Putić, Slaviša and Vujčić, Ivica",
year = "2023",
abstract = "Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.",
journal = "Radiation Physics and Chemistry",
title = "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing",
volume = "207",
pages = "110846",
doi = "10.1016/j.radphyschem.2023.110846"
}

Mališić, V., Gajić, V., Porobić, S., Patarić, A., Putić, S.,& Vujčić, I.. (2023). The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry, 207, 110846.
https://doi.org/10.1016/j.radphyschem.2023.110846

Mališić V, Gajić V, Porobić S, Patarić A, Putić S, Vujčić I. The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry. 2023;207:110846.
doi:10.1016/j.radphyschem.2023.110846 .

Mališić, Vanja, Gajić, Vuk, Porobić, Slavica, Patarić, Aleksandra, Putić, Slaviša, Vujčić, Ivica, "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing" in Radiation Physics and Chemistry, 207 (2023):110846,
https://doi.org/10.1016/j.radphyschem.2023.110846 . .

TY  - CONF
AU  - Vujčić, Ivica
AU  - Porobić, Slavica
AU  - Mašić, Slobodan
AU  - Marinović-Cincović, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12224
AB  - Liqueur from green walnuts is one of the many traditional medicines in folk medicine. It owes its healing properties to the main ingredient - unripe green walnuts. Green walnuts are a natural reservoir of vitamin C, vitamin B complex, vitamin E, calcium, potassium, magnesium, phosphorus, iron, zinc and iodine. Liqueur made from green walnuts is mostly used for problems with the thyroid gland, anemia, and various stomach infections. The liqueur is made by adding green walnuts to a container with sugar or honey and brandy, and leaving them to be exposed to the sun's rays for a period of 40 days. Photons accelerate the release of medicinal substances from green walnuts. This period of exposure is quite long, the quality of the liqueur is affected by the amount of solar energy delivered during that period, and contamination may occur during manual handling. All these problems can be solved by using photons from a radioactive gamma source instead of photons from the sun. The paper describes the process of obtaining liqueur from green walnuts using gamma radiation, as well as the comparison of the composition of liqueur obtained in the traditional way, with the effect of sunlight, and the application of an innovative method using gamma rays.
PB  - Niš : RAD Centre
C3  - RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
T1  - Production of liqueur from green walnuts using ionizing radiation
SP  - 70
EP  - 70
DO  - 10.21175/rad.abstr.book.2023.16.2
ER  - 

@conference{
author = "Vujčić, Ivica and Porobić, Slavica and Mašić, Slobodan and Marinović-Cincović, Milena",
year = "2023",
abstract = "Liqueur from green walnuts is one of the many traditional medicines in folk medicine. It owes its healing properties to the main ingredient - unripe green walnuts. Green walnuts are a natural reservoir of vitamin C, vitamin B complex, vitamin E, calcium, potassium, magnesium, phosphorus, iron, zinc and iodine. Liqueur made from green walnuts is mostly used for problems with the thyroid gland, anemia, and various stomach infections. The liqueur is made by adding green walnuts to a container with sugar or honey and brandy, and leaving them to be exposed to the sun's rays for a period of 40 days. Photons accelerate the release of medicinal substances from green walnuts. This period of exposure is quite long, the quality of the liqueur is affected by the amount of solar energy delivered during that period, and contamination may occur during manual handling. All these problems can be solved by using photons from a radioactive gamma source instead of photons from the sun. The paper describes the process of obtaining liqueur from green walnuts using gamma radiation, as well as the comparison of the composition of liqueur obtained in the traditional way, with the effect of sunlight, and the application of an innovative method using gamma rays.",
publisher = "Niš : RAD Centre",
journal = "RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts",
title = "Production of liqueur from green walnuts using ionizing radiation",
pages = "70-70",
doi = "10.21175/rad.abstr.book.2023.16.2"
}

Vujčić, I., Porobić, S., Mašić, S.,& Marinović-Cincović, M.. (2023). Production of liqueur from green walnuts using ionizing radiation. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
Niš : RAD Centre., 70-70.
https://doi.org/10.21175/rad.abstr.book.2023.16.2

Vujčić I, Porobić S, Mašić S, Marinović-Cincović M. Production of liqueur from green walnuts using ionizing radiation. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts. 2023;:70-70.
doi:10.21175/rad.abstr.book.2023.16.2 .

Vujčić, Ivica, Porobić, Slavica, Mašić, Slobodan, Marinović-Cincović, Milena, "Production of liqueur from green walnuts using ionizing radiation" in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts (2023):70-70,
https://doi.org/10.21175/rad.abstr.book.2023.16.2 . .

TY  - CONF
AU  - Kojić, Marija
AU  - Porobić, Slavica
AU  - Katnić, Đurica
AU  - Marinović-Cincović, Milena
AU  - Vujčić, Ivica
AU  - Petrović, Jelena
AU  - Simić, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12235
AB  - Mushroom cultivation and consumption have been steadily increasing in recent decades, however, after mushroom cultivation, a large amount of by-products, known as spent mushroom substrate (SMS), are left behind in open dumps where about 5 kg of SMS are generated for every kilogram of mushroom (Agaricus bisporus). Around 51 million tons of SMS are produced in the world every year. Hydrothermal carbonization (HTC) is a promising technology for the conversion of SMS into a rich carbon product, hydrochar. The hydrochar was synthesized in a hydrothermal reactor at a temperature of 180 °C for a reaction time of 1 h. The characterization of the SMS and its chars was done by FTIR, SEM, and TGA analysis. The FTIR analysis showed that aromatic and oxygen-rich functional groups are dominant on the hydrochar surface. It was noticed that the hydrochar had more visible pores compared to the SMS. The porous structure and oxygen functional groups of hydrochar probably influenced the improvement of adsorption performance, since the adsorption capacity of SMS for Cd2+ ions was 28 mg L-1, while for hydrochar it was 92 mg L-1. On the other hand, the thermal kinetic analysis has shown that hydrothermally treatment upgrades the combustion behavior of hydrochar. The kinetic parameters were determined by Kissinger and Ozawa methods. The hydrochar had notably lower activation energy compared to the SMS, which means that this hydrochar requires a smaller amount of energy to start combustion. The preliminary results show that HTC effectively transforms SMS into alternative solid biofuel and eco-friendly sorbent.
PB  - Niš : RAD Centre
C3  - RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
T1  - Thermal and adsorption study of the spent mushroom substrate and its hydrochar
SP  - 287
EP  - 287
DO  - 10.21175/rad.abstr.book.2023.44.1
ER  - 

@conference{
author = "Kojić, Marija and Porobić, Slavica and Katnić, Đurica and Marinović-Cincović, Milena and Vujčić, Ivica and Petrović, Jelena and Simić, Marija",
year = "2023",
abstract = "Mushroom cultivation and consumption have been steadily increasing in recent decades, however, after mushroom cultivation, a large amount of by-products, known as spent mushroom substrate (SMS), are left behind in open dumps where about 5 kg of SMS are generated for every kilogram of mushroom (Agaricus bisporus). Around 51 million tons of SMS are produced in the world every year. Hydrothermal carbonization (HTC) is a promising technology for the conversion of SMS into a rich carbon product, hydrochar. The hydrochar was synthesized in a hydrothermal reactor at a temperature of 180 °C for a reaction time of 1 h. The characterization of the SMS and its chars was done by FTIR, SEM, and TGA analysis. The FTIR analysis showed that aromatic and oxygen-rich functional groups are dominant on the hydrochar surface. It was noticed that the hydrochar had more visible pores compared to the SMS. The porous structure and oxygen functional groups of hydrochar probably influenced the improvement of adsorption performance, since the adsorption capacity of SMS for Cd2+ ions was 28 mg L-1, while for hydrochar it was 92 mg L-1. On the other hand, the thermal kinetic analysis has shown that hydrothermally treatment upgrades the combustion behavior of hydrochar. The kinetic parameters were determined by Kissinger and Ozawa methods. The hydrochar had notably lower activation energy compared to the SMS, which means that this hydrochar requires a smaller amount of energy to start combustion. The preliminary results show that HTC effectively transforms SMS into alternative solid biofuel and eco-friendly sorbent.",
publisher = "Niš : RAD Centre",
journal = "RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts",
title = "Thermal and adsorption study of the spent mushroom substrate and its hydrochar",
pages = "287-287",
doi = "10.21175/rad.abstr.book.2023.44.1"
}

Kojić, M., Porobić, S., Katnić, Đ., Marinović-Cincović, M., Vujčić, I., Petrović, J.,& Simić, M.. (2023). Thermal and adsorption study of the spent mushroom substrate and its hydrochar. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
Niš : RAD Centre., 287-287.
https://doi.org/10.21175/rad.abstr.book.2023.44.1

Kojić M, Porobić S, Katnić Đ, Marinović-Cincović M, Vujčić I, Petrović J, Simić M. Thermal and adsorption study of the spent mushroom substrate and its hydrochar. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts. 2023;:287-287.
doi:10.21175/rad.abstr.book.2023.44.1 .

Kojić, Marija, Porobić, Slavica, Katnić, Đurica, Marinović-Cincović, Milena, Vujčić, Ivica, Petrović, Jelena, Simić, Marija, "Thermal and adsorption study of the spent mushroom substrate and its hydrochar" in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts (2023):287-287,
https://doi.org/10.21175/rad.abstr.book.2023.44.1 . .

TY  - JOUR
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Kostić, Marija
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Kojić, Marija
AU  - Vujčić, Ivica
AU  - Marinović-Cincović, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11081
AB  - To provide new insight into the field of urea-formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio-fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X-ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non-isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.
T2  - Journal of Vinyl and Additive Technology
T1  - The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins
IS  - Early View
DO  - 10.1002/vnl.22014
ER  - 

@article{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Kostić, Marija and Jovanović, Tijana and Marković, Gordana and Kojić, Marija and Vujčić, Ivica and Marinović-Cincović, Milena",
year = "2023",
abstract = "To provide new insight into the field of urea-formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio-fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X-ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non-isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.",
journal = "Journal of Vinyl and Additive Technology",
title = "The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins",
number = "Early View",
doi = "10.1002/vnl.22014"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Kostić, M., Jovanović, T., Marković, G., Kojić, M., Vujčić, I.,& Marinović-Cincović, M.. (2023). The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins. in Journal of Vinyl and Additive Technology(Early View).
https://doi.org/10.1002/vnl.22014

Ristić M, Samaržija-Jovanović S, Jovanović V, Kostić M, Jovanović T, Marković G, Kojić M, Vujčić I, Marinović-Cincović M. The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins. in Journal of Vinyl and Additive Technology. 2023;(Early View).
doi:10.1002/vnl.22014 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Kostić, Marija, Jovanović, Tijana, Marković, Gordana, Kojić, Marija, Vujčić, Ivica, Marinović-Cincović, Milena, "The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins" in Journal of Vinyl and Additive Technology, no. Early View (2023),
https://doi.org/10.1002/vnl.22014 . .

TY  - JOUR
AU  - Ranković, Bojan
AU  - Gajić, Vuk
AU  - Mašić, Slobodan
AU  - Pavićević, Vladimir
AU  - Vujčić, Ivica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10550
AB  - Using ionizing radiation in treating waste sludge from a drinking water treatment plant is a well-known technique. Sludge treated with ionizing radiation can be used as fertilizer in agriculture. In this paper, the effects of aging on the physicochemical characteristics, the content of microorganisms, molds, acrylamide, heavy metal concentration, and total nutrient content in waste sludge treated with e-beam and gamma irradiation were investigated. The possibility of using treated sludge as a fertilizer in agriculture was evaluated. It has been shown that the content of acrylamide in treated sludge after 15 months of storage does not exceed the limits for sludge to be used as fertilizer. If the sludge is stored in closed bags in a dark place, aging does not increase total microorganisms and molds. The research also showed that the sludge's physicochemical characteristics treated in this way do not decrease under the influence of aging. Finally, it has been shown that aging does not change the concentration of heavy metals and total nutrients in sludge treated by ionizing irradiation.
T2  - Applied Radiation and Isotopes
T1  - Possibility of using ionizing radiation treated sludge from drinking water treatment plant as fertilizer in agriculture: Effects of aging
VL  - 192
SP  - 110602
DO  - 10.1016/j.apradiso.2022.110602
ER  - 

@article{
author = "Ranković, Bojan and Gajić, Vuk and Mašić, Slobodan and Pavićević, Vladimir and Vujčić, Ivica",
year = "2023",
abstract = "Using ionizing radiation in treating waste sludge from a drinking water treatment plant is a well-known technique. Sludge treated with ionizing radiation can be used as fertilizer in agriculture. In this paper, the effects of aging on the physicochemical characteristics, the content of microorganisms, molds, acrylamide, heavy metal concentration, and total nutrient content in waste sludge treated with e-beam and gamma irradiation were investigated. The possibility of using treated sludge as a fertilizer in agriculture was evaluated. It has been shown that the content of acrylamide in treated sludge after 15 months of storage does not exceed the limits for sludge to be used as fertilizer. If the sludge is stored in closed bags in a dark place, aging does not increase total microorganisms and molds. The research also showed that the sludge's physicochemical characteristics treated in this way do not decrease under the influence of aging. Finally, it has been shown that aging does not change the concentration of heavy metals and total nutrients in sludge treated by ionizing irradiation.",
journal = "Applied Radiation and Isotopes",
title = "Possibility of using ionizing radiation treated sludge from drinking water treatment plant as fertilizer in agriculture: Effects of aging",
volume = "192",
pages = "110602",
doi = "10.1016/j.apradiso.2022.110602"
}

Ranković, B., Gajić, V., Mašić, S., Pavićević, V.,& Vujčić, I.. (2023). Possibility of using ionizing radiation treated sludge from drinking water treatment plant as fertilizer in agriculture: Effects of aging. in Applied Radiation and Isotopes, 192, 110602.
https://doi.org/10.1016/j.apradiso.2022.110602

Ranković B, Gajić V, Mašić S, Pavićević V, Vujčić I. Possibility of using ionizing radiation treated sludge from drinking water treatment plant as fertilizer in agriculture: Effects of aging. in Applied Radiation and Isotopes. 2023;192:110602.
doi:10.1016/j.apradiso.2022.110602 .

Ranković, Bojan, Gajić, Vuk, Mašić, Slobodan, Pavićević, Vladimir, Vujčić, Ivica, "Possibility of using ionizing radiation treated sludge from drinking water treatment plant as fertilizer in agriculture: Effects of aging" in Applied Radiation and Isotopes, 192 (2023):110602,
https://doi.org/10.1016/j.apradiso.2022.110602 . .

TY  - JOUR
AU  - Katnić, Đurica
AU  - Marinović-Cincović, Milena
AU  - Porobić, Slavica
AU  - Vujčić, Ivica
AU  - Šaponjić, Aleksandra
AU  - Sikirić, Biljana
AU  - Živojinović, Dragana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10230
AB  - Redirecting waste biomass back into the economy can reduce their burden on the environment. The use of waste biomass for the production of fuels, value-added materials or natural fillers has significant economic and environmental benefits. Physico-chemical characterization of waste biomass (plum pomace and fig pomace) was done by proximate, elemental, biochemical analysis, FTIR and SEM analysis. The calorific value of both biomasses can be compared with the calorific value of lignite, which rises their potential use as a solid biofuel. The combustion behavior of biomass was investigated by thermal analysis techniques. Based on thermal degradation experiments performed at four heating rates a kinetic analysis of the biomass decomposition process was accomplished. The kinetic study was done using Kissinger method, Ozawa method, Flynn-Wall-Ozawa (FWO) method, Starink method, and Kissinger-Akahira-Sunose (KAS) method. The value of activation energy obtained by different kinetic methods was ∼210 kJ/mol for plum pomace and ∼162 kJ/mol for fig pomace. Estimated activation energy values were used to calculate thermodynamic parameters. In addition to the fact that the obtained results can serve as a useful reference for the design of pyrolysis reactors, this research has ecological significance because it solves the problem of solid waste disposal.
T2  - Journal of Cleaner Production
T1  - Characterization and kinetics of thermal decomposition behavior of plum and fig pomace biomass
VL  - 352
SP  - 131637
DO  - 10.1016/j.jclepro.2022.131637
ER  - 

@article{
author = "Katnić, Đurica and Marinović-Cincović, Milena and Porobić, Slavica and Vujčić, Ivica and Šaponjić, Aleksandra and Sikirić, Biljana and Živojinović, Dragana",
year = "2022",
abstract = "Redirecting waste biomass back into the economy can reduce their burden on the environment. The use of waste biomass for the production of fuels, value-added materials or natural fillers has significant economic and environmental benefits. Physico-chemical characterization of waste biomass (plum pomace and fig pomace) was done by proximate, elemental, biochemical analysis, FTIR and SEM analysis. The calorific value of both biomasses can be compared with the calorific value of lignite, which rises their potential use as a solid biofuel. The combustion behavior of biomass was investigated by thermal analysis techniques. Based on thermal degradation experiments performed at four heating rates a kinetic analysis of the biomass decomposition process was accomplished. The kinetic study was done using Kissinger method, Ozawa method, Flynn-Wall-Ozawa (FWO) method, Starink method, and Kissinger-Akahira-Sunose (KAS) method. The value of activation energy obtained by different kinetic methods was ∼210 kJ/mol for plum pomace and ∼162 kJ/mol for fig pomace. Estimated activation energy values were used to calculate thermodynamic parameters. In addition to the fact that the obtained results can serve as a useful reference for the design of pyrolysis reactors, this research has ecological significance because it solves the problem of solid waste disposal.",
journal = "Journal of Cleaner Production",
title = "Characterization and kinetics of thermal decomposition behavior of plum and fig pomace biomass",
volume = "352",
pages = "131637",
doi = "10.1016/j.jclepro.2022.131637"
}

Katnić, Đ., Marinović-Cincović, M., Porobić, S., Vujčić, I., Šaponjić, A., Sikirić, B.,& Živojinović, D.. (2022). Characterization and kinetics of thermal decomposition behavior of plum and fig pomace biomass. in Journal of Cleaner Production, 352, 131637.
https://doi.org/10.1016/j.jclepro.2022.131637

Katnić Đ, Marinović-Cincović M, Porobić S, Vujčić I, Šaponjić A, Sikirić B, Živojinović D. Characterization and kinetics of thermal decomposition behavior of plum and fig pomace biomass. in Journal of Cleaner Production. 2022;352:131637.
doi:10.1016/j.jclepro.2022.131637 .

Katnić, Đurica, Marinović-Cincović, Milena, Porobić, Slavica, Vujčić, Ivica, Šaponjić, Aleksandra, Sikirić, Biljana, Živojinović, Dragana, "Characterization and kinetics of thermal decomposition behavior of plum and fig pomace biomass" in Journal of Cleaner Production, 352 (2022):131637,
https://doi.org/10.1016/j.jclepro.2022.131637 . .

TY  - CONF
AU  - Katnić, Đurica
AU  - Vujčić, Ivica
AU  - Kojić, Marija
AU  - Krstić, Aleksandar D.
AU  - Marinović-Cincović, Milena
AU  - Porobić, Slavica
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11110
AB  - Fig (Ficus carica L.) is a fruit of the Moraceae family, which is mostly grown in subtropical regions, but also grows in Serbia. Fig trees are usually grown in warm and dry climates. According to the FAO world production of figs is stable, with a decade-long average of about 1.1 million tons a year. Fig pomace are formed after fermentation of this fruit which is used for the preparation of brandy. The brandy industry generates huge amounts of pomace as industrial waste, so pyrolysis as thermochemical technologies was used for organic agro-industrial waste treatment. Biochar produced by pyrolysis of fig pomace at 500 °C were characterized and investigated as adsorbents for the removal of Pb2+ ions from aqueous solution. Fig pomace before and after pyrolysis was characterized using proximate, inorganic and elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Biochar has a carbon matrix with a high degree of porosity and large surface area, suggesting that it can be used as a surface adsorbent and thus have a significant role in controlling environmental contaminants. The surface modification by gamma irradiation was done to enhance the adsorption capacity of biochar. The Pb2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Freundlich and Langmuir model. The results of this work suggest that pyrolysis and irradiation of biomass is a promising way to produce efficient heavy metal sorbents for waste-water treatment.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Fig pomace biochar modified using gamma irradiation
for Pb2+ ions adsorption from aqueous solution
SP  - 43
DO  - 10.21175/rad.spr.abstr.book.2022.11.3
ER  - 

@conference{
author = "Katnić, Đurica and Vujčić, Ivica and Kojić, Marija and Krstić, Aleksandar D. and Marinović-Cincović, Milena and Porobić, Slavica",
year = "2022",
abstract = "Fig (Ficus carica L.) is a fruit of the Moraceae family, which is mostly grown in subtropical regions, but also grows in Serbia. Fig trees are usually grown in warm and dry climates. According to the FAO world production of figs is stable, with a decade-long average of about 1.1 million tons a year. Fig pomace are formed after fermentation of this fruit which is used for the preparation of brandy. The brandy industry generates huge amounts of pomace as industrial waste, so pyrolysis as thermochemical technologies was used for organic agro-industrial waste treatment. Biochar produced by pyrolysis of fig pomace at 500 °C were characterized and investigated as adsorbents for the removal of Pb2+ ions from aqueous solution. Fig pomace before and after pyrolysis was characterized using proximate, inorganic and elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Biochar has a carbon matrix with a high degree of porosity and large surface area, suggesting that it can be used as a surface adsorbent and thus have a significant role in controlling environmental contaminants. The surface modification by gamma irradiation was done to enhance the adsorption capacity of biochar. The Pb2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Freundlich and Langmuir model. The results of this work suggest that pyrolysis and irradiation of biomass is a promising way to produce efficient heavy metal sorbents for waste-water treatment.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Fig pomace biochar modified using gamma irradiation
for Pb2+ ions adsorption from aqueous solution",
pages = "43",
doi = "10.21175/rad.spr.abstr.book.2022.11.3"
}

Katnić, Đ., Vujčić, I., Kojić, M., Krstić, A. D., Marinović-Cincović, M.,& Porobić, S.. (2022). Fig pomace biochar modified using gamma irradiation
for Pb2+ ions adsorption from aqueous solution. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 43.
https://doi.org/10.21175/rad.spr.abstr.book.2022.11.3

Katnić Đ, Vujčić I, Kojić M, Krstić AD, Marinović-Cincović M, Porobić S. Fig pomace biochar modified using gamma irradiation
for Pb2+ ions adsorption from aqueous solution. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:43.
doi:10.21175/rad.spr.abstr.book.2022.11.3 .

Katnić, Đurica, Vujčić, Ivica, Kojić, Marija, Krstić, Aleksandar D., Marinović-Cincović, Milena, Porobić, Slavica, "Fig pomace biochar modified using gamma irradiation
for Pb2+ ions adsorption from aqueous solution" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):43,
https://doi.org/10.21175/rad.spr.abstr.book.2022.11.3 . .

TY  - CONF
AU  - Katnić, Đurica
AU  - Porobić, Slavica
AU  - Marinović-Cincović, Milena
AU  - Vujčić, Ivica
AU  - Kojić, Marija
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11112
AB  - The use of waste biomass for the production of fuels, sorbent of different pollutants or natural fillers has significant economic and environmental benefits. Plum (Prunus domestica) is a lush fruit consisting of bones, flesh and skin. It can be consumed fresh, dried or used to make juices, jams and brandies known as plum brandy. Plum is also known as a laxative. During processing, plum pomace is formed as a by-product of plum brandy production. Plum pomace contains a large proportion of polyphenols, so it can be used to produce dietary supplements. Therefore, in this study, the gamma irradiation activated biochar of plum pomace was examined as a lowcost biosorbent of Cd2+ ions from aqueous solution. It was prepared using pyrolysis process at 500 °C for a reaction time of 1 h, then was activated by gamma irradiation. The characterization of plum pomace before and after pyrolysis was done by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Analysis of morphology and functional groups presented the formation of cracks on the biochar surface, which are mainly dominated by oxygen-rich functional groups. The adsorption capacity of activated biochar was higher than inactivated biochar because its improved surface functional properties after gamma activation. The Cd2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Langmuir and Freundlich model. The findings of this study confirm that pyrolysis is a promising way to produce efficient environmentally friendly sorbents for wastewater treatment.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Removal of Cd2+ ions from aqueous solutions by
gamma irradiation activated biochar of plum pomace
SP  - 52
DO  - 10.21175/rad.spr.abstr.book.2022.13.7
ER  - 

@conference{
author = "Katnić, Đurica and Porobić, Slavica and Marinović-Cincović, Milena and Vujčić, Ivica and Kojić, Marija",
year = "2022",
abstract = "The use of waste biomass for the production of fuels, sorbent of different pollutants or natural fillers has significant economic and environmental benefits. Plum (Prunus domestica) is a lush fruit consisting of bones, flesh and skin. It can be consumed fresh, dried or used to make juices, jams and brandies known as plum brandy. Plum is also known as a laxative. During processing, plum pomace is formed as a by-product of plum brandy production. Plum pomace contains a large proportion of polyphenols, so it can be used to produce dietary supplements. Therefore, in this study, the gamma irradiation activated biochar of plum pomace was examined as a lowcost biosorbent of Cd2+ ions from aqueous solution. It was prepared using pyrolysis process at 500 °C for a reaction time of 1 h, then was activated by gamma irradiation. The characterization of plum pomace before and after pyrolysis was done by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Analysis of morphology and functional groups presented the formation of cracks on the biochar surface, which are mainly dominated by oxygen-rich functional groups. The adsorption capacity of activated biochar was higher than inactivated biochar because its improved surface functional properties after gamma activation. The Cd2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Langmuir and Freundlich model. The findings of this study confirm that pyrolysis is a promising way to produce efficient environmentally friendly sorbents for wastewater treatment.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Removal of Cd2+ ions from aqueous solutions by
gamma irradiation activated biochar of plum pomace",
pages = "52",
doi = "10.21175/rad.spr.abstr.book.2022.13.7"
}

Katnić, Đ., Porobić, S., Marinović-Cincović, M., Vujčić, I.,& Kojić, M.. (2022). Removal of Cd2+ ions from aqueous solutions by
gamma irradiation activated biochar of plum pomace. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 52.
https://doi.org/10.21175/rad.spr.abstr.book.2022.13.7

Katnić Đ, Porobić S, Marinović-Cincović M, Vujčić I, Kojić M. Removal of Cd2+ ions from aqueous solutions by
gamma irradiation activated biochar of plum pomace. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:52.
doi:10.21175/rad.spr.abstr.book.2022.13.7 .

Katnić, Đurica, Porobić, Slavica, Marinović-Cincović, Milena, Vujčić, Ivica, Kojić, Marija, "Removal of Cd2+ ions from aqueous solutions by
gamma irradiation activated biochar of plum pomace" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):52,
https://doi.org/10.21175/rad.spr.abstr.book.2022.13.7 . .

TY  - JOUR
AU  - Gajić, Vuk A.
AU  - Mirković, Nikola R.
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10522
AB  - Special high-protein foods suitable for diabetics must be treated to ensure the complete absence of microorganisms and bacteria. It is also important to achieve that this treatment does not change the nutritional value of the product. Among the new decontamination technologies, low-energy electron-beam treatment has proven to be an effective technique for inactivating bacteria with minimal impact on food quality. The paper aims to analyze the influence of low-energy electron-beam irradiation on the microbiological properties and nutritional value of high-protein foods.
T2  - Nuclear Technology and Radiation Protection
T1  - Use of low-energy electron-beam in the treatment of special food products with a high protein content
VL  - 37
IS  - 2
SP  - 153
EP  - 158
DO  - 10.2298/ntrp2202153g
ER  - 

@article{
author = "Gajić, Vuk A. and Mirković, Nikola R. and Vujčić, Ivica and Mašić, Slobodan",
year = "2022",
abstract = "Special high-protein foods suitable for diabetics must be treated to ensure the complete absence of microorganisms and bacteria. It is also important to achieve that this treatment does not change the nutritional value of the product. Among the new decontamination technologies, low-energy electron-beam treatment has proven to be an effective technique for inactivating bacteria with minimal impact on food quality. The paper aims to analyze the influence of low-energy electron-beam irradiation on the microbiological properties and nutritional value of high-protein foods.",
journal = "Nuclear Technology and Radiation Protection",
title = "Use of low-energy electron-beam in the treatment of special food products with a high protein content",
volume = "37",
number = "2",
pages = "153-158",
doi = "10.2298/ntrp2202153g"
}

Gajić, V. A., Mirković, N. R., Vujčić, I.,& Mašić, S.. (2022). Use of low-energy electron-beam in the treatment of special food products with a high protein content. in Nuclear Technology and Radiation Protection, 37(2), 153-158.
https://doi.org/10.2298/ntrp2202153g

Gajić VA, Mirković NR, Vujčić I, Mašić S. Use of low-energy electron-beam in the treatment of special food products with a high protein content. in Nuclear Technology and Radiation Protection. 2022;37(2):153-158.
doi:10.2298/ntrp2202153g .

Gajić, Vuk A., Mirković, Nikola R., Vujčić, Ivica, Mašić, Slobodan, "Use of low-energy electron-beam in the treatment of special food products with a high protein content" in Nuclear Technology and Radiation Protection, 37, no. 2 (2022):153-158,
https://doi.org/10.2298/ntrp2202153g . .

TY  - JOUR
AU  - Mašić, Slobodan
AU  - Vujčić, Ivica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10080
AB  - Lyophilization or freeze-drying is the technique of removing ice or other frozen solvents from a material through sublimation and the removal of bound water molecules through the process of desorption. Drying occurs in an absolute vacuum at temperatures from −40°C to −50°C. This technique is often used for the conservation of fruits, especially berries. During this process, the water changes from frozen to gaseous, with no thawing. Due to low temperatures and the high vacuum, most microorganisms are rendered inactive during the lyophilization process. However, if there is a necessity to destroy all microorganisms from treated food, subsequent irradiation with gamma rays is an appropriate method. This paper investigated the influence of different doses of gamma radiation on lyophilized berries’ microbiological characteristics. It was shown that the radiation dose of 7 kGy is sufficient to eliminate the total number of microorganisms (excluding molds) to the extent that the number falls below the permitted limit according t o the law on the microbiological safety of foodstuffs of the Republic of Serbia, and 5 kGy is enough for molds to be rendered inactive. It was also concluded that gamma irradiation does not affect the nutritional value of lyophilized berries.
T2  - Nukleonika
T1  - Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries
VL  - 66
IS  - 4
SP  - 221
EP  - 225
DO  - 10.2478/nuka-2021-0032
ER  - 

@article{
author = "Mašić, Slobodan and Vujčić, Ivica",
year = "2021",
abstract = "Lyophilization or freeze-drying is the technique of removing ice or other frozen solvents from a material through sublimation and the removal of bound water molecules through the process of desorption. Drying occurs in an absolute vacuum at temperatures from −40°C to −50°C. This technique is often used for the conservation of fruits, especially berries. During this process, the water changes from frozen to gaseous, with no thawing. Due to low temperatures and the high vacuum, most microorganisms are rendered inactive during the lyophilization process. However, if there is a necessity to destroy all microorganisms from treated food, subsequent irradiation with gamma rays is an appropriate method. This paper investigated the influence of different doses of gamma radiation on lyophilized berries’ microbiological characteristics. It was shown that the radiation dose of 7 kGy is sufficient to eliminate the total number of microorganisms (excluding molds) to the extent that the number falls below the permitted limit according t o the law on the microbiological safety of foodstuffs of the Republic of Serbia, and 5 kGy is enough for molds to be rendered inactive. It was also concluded that gamma irradiation does not affect the nutritional value of lyophilized berries.",
journal = "Nukleonika",
title = "Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries",
volume = "66",
number = "4",
pages = "221-225",
doi = "10.2478/nuka-2021-0032"
}

Mašić, S.,& Vujčić, I.. (2021). Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries. in Nukleonika, 66(4), 221-225.
https://doi.org/10.2478/nuka-2021-0032

Mašić S, Vujčić I. Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries. in Nukleonika. 2021;66(4):221-225.
doi:10.2478/nuka-2021-0032 .

Mašić, Slobodan, Vujčić, Ivica, "Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries" in Nukleonika, 66, no. 4 (2021):221-225,
https://doi.org/10.2478/nuka-2021-0032 . .

TY  - JOUR
AU  - Gajić, Vuk A.
AU  - Vujčić, Ivica
AU  - Dražić, Gordana D.
AU  - Milovanović, Jelena
AU  - Mašić, Slobodan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10377
AB  - The Kolubara river pollutes the coastal land in the river basin and makes it unsuitable for agricultural activities in that area. Also, contaminated land poses a risk to the environment. Different methods can be used for soil decontamination. These methods include biological treatment/bioremediation, chemical oxidation, soil stabilization, physical methods, such as soil leaching, or treatment with high-energy ionizing radiation. Gamma irradiation of soil is a well-known method of inhibiting microbial activity. This paper investigated the influence of different doses and dose rates of gamma irradiation on microorganisms' decontamination of coastal soil, in the Kolubara river basin. The irradiation effects on reducing the total number of microorganisms and removing mold and pathogenic bacteria from soil samples were examined. Gamma radiation affects the soil's organic matter, causing the formation of free reactive radicals, which act as reducing and oxidizing agents, cleaving C-C bonds, and depolymerizing carbohydrates. It was found that a dose of 3 kGy of gamma radiation, neutralizes all pathogenic bacteria, a dose of 5 kGy deactivates mold in soil samples, and a dose of 10 kGy is optimal to kill all microorganisms in the samples and sterilize exposed soil. The research showed that the dose rate does not significantly affect microbiological decontamination of soil using gamma irradiation. The content of heavy metals in soil was determined, and the obtained values were compared with the remediation limit values prescribed by the regulations. It was concluded that the content of heavy metals in the analyzed soil samples is below the limit of remediation values. The only exception is the slightly increased copper content in one sample. The result of this research is the conclusion that the coastal land from the Kolubara basin can be decontaminated by gamma radiation treatment. This advanced soil treatment technology is available in Serbia because there is an industrial plant for gamma radiation treatment within the Vinča Institute.
T2  - Nuclear Technology and Radiation Protection
T1  - Use of high-energy ionizing radiation for microbiological decontamination of coastal soil in the Kolubara river basin, Serbia
VL  - 36
IS  - 3
SP  - 261
EP  - 270
DO  - 10.2298/NTRP2103261G
ER  - 

@article{
author = "Gajić, Vuk A. and Vujčić, Ivica and Dražić, Gordana D. and Milovanović, Jelena and Mašić, Slobodan",
year = "2021",
abstract = "The Kolubara river pollutes the coastal land in the river basin and makes it unsuitable for agricultural activities in that area. Also, contaminated land poses a risk to the environment. Different methods can be used for soil decontamination. These methods include biological treatment/bioremediation, chemical oxidation, soil stabilization, physical methods, such as soil leaching, or treatment with high-energy ionizing radiation. Gamma irradiation of soil is a well-known method of inhibiting microbial activity. This paper investigated the influence of different doses and dose rates of gamma irradiation on microorganisms' decontamination of coastal soil, in the Kolubara river basin. The irradiation effects on reducing the total number of microorganisms and removing mold and pathogenic bacteria from soil samples were examined. Gamma radiation affects the soil's organic matter, causing the formation of free reactive radicals, which act as reducing and oxidizing agents, cleaving C-C bonds, and depolymerizing carbohydrates. It was found that a dose of 3 kGy of gamma radiation, neutralizes all pathogenic bacteria, a dose of 5 kGy deactivates mold in soil samples, and a dose of 10 kGy is optimal to kill all microorganisms in the samples and sterilize exposed soil. The research showed that the dose rate does not significantly affect microbiological decontamination of soil using gamma irradiation. The content of heavy metals in soil was determined, and the obtained values were compared with the remediation limit values prescribed by the regulations. It was concluded that the content of heavy metals in the analyzed soil samples is below the limit of remediation values. The only exception is the slightly increased copper content in one sample. The result of this research is the conclusion that the coastal land from the Kolubara basin can be decontaminated by gamma radiation treatment. This advanced soil treatment technology is available in Serbia because there is an industrial plant for gamma radiation treatment within the Vinča Institute.",
journal = "Nuclear Technology and Radiation Protection",
title = "Use of high-energy ionizing radiation for microbiological decontamination of coastal soil in the Kolubara river basin, Serbia",
volume = "36",
number = "3",
pages = "261-270",
doi = "10.2298/NTRP2103261G"
}

Gajić, V. A., Vujčić, I., Dražić, G. D., Milovanović, J.,& Mašić, S.. (2021). Use of high-energy ionizing radiation for microbiological decontamination of coastal soil in the Kolubara river basin, Serbia. in Nuclear Technology and Radiation Protection, 36(3), 261-270.
https://doi.org/10.2298/NTRP2103261G

Gajić VA, Vujčić I, Dražić GD, Milovanović J, Mašić S. Use of high-energy ionizing radiation for microbiological decontamination of coastal soil in the Kolubara river basin, Serbia. in Nuclear Technology and Radiation Protection. 2021;36(3):261-270.
doi:10.2298/NTRP2103261G .

Gajić, Vuk A., Vujčić, Ivica, Dražić, Gordana D., Milovanović, Jelena, Mašić, Slobodan, "Use of high-energy ionizing radiation for microbiological decontamination of coastal soil in the Kolubara river basin, Serbia" in Nuclear Technology and Radiation Protection, 36, no. 3 (2021):261-270,
https://doi.org/10.2298/NTRP2103261G . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9559
AB  - Aflatoxins are natural mycotoxins that mainly occur in areas with humid climates. One of the methods for the successful elimination of aflatoxins is gamma radiation treatment. In this paper, gamma radiation's influence on the content of aflatoxins in hemp flour and microbiological properties (total number of microorganisms, molds, and potentially pathogenic bacteria) and nutritional values were investigated. The artificial radioactive isotope of cobalt Co-60, with a dose rate of 10 kGy/hr, was used as the radiation source. Using high-performance liquid chromatography, we determined that a dose of 4 kGy was sufficient to eliminate aflatoxins below the acceptable value. An irradiation dose of 8 kGy was sufficient to eliminate the total number of microorganisms and molds. Also, a treatment of 3 kGy is enough to remove all bacteria. Finally, it was shown that gamma irradiation does not affect the nutritional value of the product. Novelty Impact Statement: Hemp flour is rich in healthy fats, magnesium, fiber, and protein. However, it may be contaminated with aflatoxins, microorganisms, molds, and potentially pathogenic bacteria. Gamma irradiation is an effective method of food preservation that guarantees food decontamination and protection of nutrients. In this paper, an adequate dose of gamma radiation to preserve hemp flour has been established. © 2021 Wiley Periodicals LLC.
T2  - Journal of Food Processing and Preservation
T1  - Preservation of hemp flour using high‐energy ionizing radiation: The effect of gamma radiation on aflatoxin inactivation, microbiological properties, and nutritional values
VL  - 45
IS  - 4
DO  - 10.1111/jfpp.15314
ER  - 

@article{
author = "Vujčić, Ivica and Mašić, Slobodan",
year = "2021",
abstract = "Aflatoxins are natural mycotoxins that mainly occur in areas with humid climates. One of the methods for the successful elimination of aflatoxins is gamma radiation treatment. In this paper, gamma radiation's influence on the content of aflatoxins in hemp flour and microbiological properties (total number of microorganisms, molds, and potentially pathogenic bacteria) and nutritional values were investigated. The artificial radioactive isotope of cobalt Co-60, with a dose rate of 10 kGy/hr, was used as the radiation source. Using high-performance liquid chromatography, we determined that a dose of 4 kGy was sufficient to eliminate aflatoxins below the acceptable value. An irradiation dose of 8 kGy was sufficient to eliminate the total number of microorganisms and molds. Also, a treatment of 3 kGy is enough to remove all bacteria. Finally, it was shown that gamma irradiation does not affect the nutritional value of the product. Novelty Impact Statement: Hemp flour is rich in healthy fats, magnesium, fiber, and protein. However, it may be contaminated with aflatoxins, microorganisms, molds, and potentially pathogenic bacteria. Gamma irradiation is an effective method of food preservation that guarantees food decontamination and protection of nutrients. In this paper, an adequate dose of gamma radiation to preserve hemp flour has been established. © 2021 Wiley Periodicals LLC.",
journal = "Journal of Food Processing and Preservation",
title = "Preservation of hemp flour using high‐energy ionizing radiation: The effect of gamma radiation on aflatoxin inactivation, microbiological properties, and nutritional values",
volume = "45",
number = "4",
doi = "10.1111/jfpp.15314"
}

Vujčić, I.,& Mašić, S.. (2021). Preservation of hemp flour using high‐energy ionizing radiation: The effect of gamma radiation on aflatoxin inactivation, microbiological properties, and nutritional values. in Journal of Food Processing and Preservation, 45(4).
https://doi.org/10.1111/jfpp.15314

Vujčić I, Mašić S. Preservation of hemp flour using high‐energy ionizing radiation: The effect of gamma radiation on aflatoxin inactivation, microbiological properties, and nutritional values. in Journal of Food Processing and Preservation. 2021;45(4).
doi:10.1111/jfpp.15314 .

Vujčić, Ivica, Mašić, Slobodan, "Preservation of hemp flour using high‐energy ionizing radiation: The effect of gamma radiation on aflatoxin inactivation, microbiological properties, and nutritional values" in Journal of Food Processing and Preservation, 45, no. 4 (2021),
https://doi.org/10.1111/jfpp.15314 . .

TY  - JOUR
AU  - Ranković, Bojan
AU  - Nikolić, Nikolina
AU  - Mašić, Slobodan
AU  - Vujčić, Ivica
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9596
AB  - The distribution of the absorbed dose within the irradiated product is a complex function of the product density and homogeneity, the position and shape of the radiation source, as well as the design of the irradiator. In this paper, detailed mapping of absorbed radiation doses in products of different density: gauze, plastic, and soil, is performed. Positions of minimum and maximum absorbed radiation dose were determined, and the homogeneity of irradiation of products was calculated using the ethanol-monochlorobenzene oscillotitrator dosimetry system. © 2020, Vinca Inst Nuclear Sci. All rights reserved.
T2  - Nuclear Technology and Radiation Protection
T1  - Dose mapping of products with different density irradiated in 60co irradiation facility of the Vinca institute, Serbia
VL  - 35
IS  - 1
SP  - 56
EP  - 63
DO  - 10.2298/NTRP2001056R
ER  - 

@article{
author = "Ranković, Bojan and Nikolić, Nikolina and Mašić, Slobodan and Vujčić, Ivica",
year = "2020",
abstract = "The distribution of the absorbed dose within the irradiated product is a complex function of the product density and homogeneity, the position and shape of the radiation source, as well as the design of the irradiator. In this paper, detailed mapping of absorbed radiation doses in products of different density: gauze, plastic, and soil, is performed. Positions of minimum and maximum absorbed radiation dose were determined, and the homogeneity of irradiation of products was calculated using the ethanol-monochlorobenzene oscillotitrator dosimetry system. © 2020, Vinca Inst Nuclear Sci. All rights reserved.",
journal = "Nuclear Technology and Radiation Protection",
title = "Dose mapping of products with different density irradiated in 60co irradiation facility of the Vinca institute, Serbia",
volume = "35",
number = "1",
pages = "56-63",
doi = "10.2298/NTRP2001056R"
}

Ranković, B., Nikolić, N., Mašić, S.,& Vujčić, I.. (2020). Dose mapping of products with different density irradiated in 60co irradiation facility of the Vinca institute, Serbia. in Nuclear Technology and Radiation Protection, 35(1), 56-63.
https://doi.org/10.2298/NTRP2001056R

Ranković B, Nikolić N, Mašić S, Vujčić I. Dose mapping of products with different density irradiated in 60co irradiation facility of the Vinca institute, Serbia. in Nuclear Technology and Radiation Protection. 2020;35(1):56-63.
doi:10.2298/NTRP2001056R .

Ranković, Bojan, Nikolić, Nikolina, Mašić, Slobodan, Vujčić, Ivica, "Dose mapping of products with different density irradiated in 60co irradiation facility of the Vinca institute, Serbia" in Nuclear Technology and Radiation Protection, 35, no. 1 (2020):56-63,
https://doi.org/10.2298/NTRP2001056R . .

TY  - CONF
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
AU  - Obradović, Nataša
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8519
AB  - Wooden cultural heritage serves as a very important source of information for historians and researchers. Also, it imposes an obligation on the science to keep this legacy for future generations in a proper condition. Among other techniques of conservation of wooden cultural heritage, a very suitable method is impregnation of the wood with the polymer, whereby the wood/polymer composites are formed. This paper describes the method of preparing the wood/polymer composites based on beechwood, using five different monomer systems. The method of lyophilization and subsequent polymerization by gamma radiation was used. After lyophilization and immersing in the monomer solutions, the wood samples were dried and irradiated with a dose of 25 kGy and different gamma irradiation dose rates. The weight of the samples before and after this procedure was measured. Also, changes in the mechanical properties of wood (compression test) before and after treatment were examined. We also examined the effect of radiation dose rate on polymerization. Based on the weight differences, dose rates and materials characterization we determined which of the monomer solution and dose rate are the most suitable for making beechwood/polymer composites. © 2019 Elsevier Ltd
C3  - Radiation Physics and Chemistry
T1  - Preparation of beechwood/polymer composites using the method of lyophilization and gamma irradiation
VL  - 166
SP  - 108505
DO  - 10.1016/j.radphyschem.2019.108505
ER  - 

@conference{
author = "Vujčić, Ivica and Mašić, Slobodan and Obradović, Nataša and Dramićanin, Miroslav",
year = "2020",
abstract = "Wooden cultural heritage serves as a very important source of information for historians and researchers. Also, it imposes an obligation on the science to keep this legacy for future generations in a proper condition. Among other techniques of conservation of wooden cultural heritage, a very suitable method is impregnation of the wood with the polymer, whereby the wood/polymer composites are formed. This paper describes the method of preparing the wood/polymer composites based on beechwood, using five different monomer systems. The method of lyophilization and subsequent polymerization by gamma radiation was used. After lyophilization and immersing in the monomer solutions, the wood samples were dried and irradiated with a dose of 25 kGy and different gamma irradiation dose rates. The weight of the samples before and after this procedure was measured. Also, changes in the mechanical properties of wood (compression test) before and after treatment were examined. We also examined the effect of radiation dose rate on polymerization. Based on the weight differences, dose rates and materials characterization we determined which of the monomer solution and dose rate are the most suitable for making beechwood/polymer composites. © 2019 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Preparation of beechwood/polymer composites using the method of lyophilization and gamma irradiation",
volume = "166",
pages = "108505",
doi = "10.1016/j.radphyschem.2019.108505"
}

Vujčić, I., Mašić, S., Obradović, N.,& Dramićanin, M.. (2020). Preparation of beechwood/polymer composites using the method of lyophilization and gamma irradiation. in Radiation Physics and Chemistry, 166, 108505.
https://doi.org/10.1016/j.radphyschem.2019.108505

Vujčić I, Mašić S, Obradović N, Dramićanin M. Preparation of beechwood/polymer composites using the method of lyophilization and gamma irradiation. in Radiation Physics and Chemistry. 2020;166:108505.
doi:10.1016/j.radphyschem.2019.108505 .

Vujčić, Ivica, Mašić, Slobodan, Obradović, Nataša, Dramićanin, Miroslav, "Preparation of beechwood/polymer composites using the method of lyophilization and gamma irradiation" in Radiation Physics and Chemistry, 166 (2020):108505,
https://doi.org/10.1016/j.radphyschem.2019.108505 . .

TY  - JOUR
AU  - Janićijević, Željko
AU  - Vujčić, Ivica
AU  - Veljović, Đorđe N.
AU  - Vujisić, Miloš Lj.
AU  - Radovanović, Filip
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8514
AB  - Composite hydrogels capable of controlled drug delivery via ion exchange are an interesting group of materials for the construction of implantable drug reservoirs for electrically charged drugs. In this study, we synthesized composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) (PLGA-PAA) hydrogels by sequential application of UV or gamma irradiation and traditional phase inversion. Physicochemical properties of the composite PLGA-PAA hydrogels were investigated using Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). We examined the ion exchange capacity (IEC) and swelling behavior of these materials to determine their potential as drug reservoirs. Composite PLGA-PAA hydrogel synthesized using UV irradiation (UV-PLGA-PAA) exhibited a porous microstructure with submicron-sized hydrogel-rich aggregates and homogeneous chemical composition. Swelling behavior and IEC of this material were highly reproducible. Composite PLGA-PAA hydrogels synthesized using gamma irradiation (G-PLGA-PAAs) had a less uniform microstructure with larger pores and micron-sized hydrogel-rich aggregates while exhibiting rather inhomogeneous chemical composition. These materials showed superior swelling properties, but a more variable IEC, compared to the material fabricated using UV irradiation. Results of DSC analysis showed a dose-dependent decrease in glass transition temperature for G-PLGA-PAAs indicating the effects of PLGA chain scission. Our findings indicate that gamma irradiation is a possible alternative to UV irradiation in the synthesis of composite PLGA-PAA hydrogels which can modify or control important material properties. However, the synthesis protocol using gamma irradiation should be further optimized to improve the IEC reproducibility. In our future research, we will investigate the in vitro release of charged drugs from synthesized composite PLGA-PAA hydrogels under physiological conditions. © 2019 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties
VL  - 166
SP  - 108466
DO  - 10.1016/j.radphyschem.2019.108466
ER  - 

@article{
author = "Janićijević, Željko and Vujčić, Ivica and Veljović, Đorđe N. and Vujisić, Miloš Lj. and Radovanović, Filip",
year = "2020",
abstract = "Composite hydrogels capable of controlled drug delivery via ion exchange are an interesting group of materials for the construction of implantable drug reservoirs for electrically charged drugs. In this study, we synthesized composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) (PLGA-PAA) hydrogels by sequential application of UV or gamma irradiation and traditional phase inversion. Physicochemical properties of the composite PLGA-PAA hydrogels were investigated using Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). We examined the ion exchange capacity (IEC) and swelling behavior of these materials to determine their potential as drug reservoirs. Composite PLGA-PAA hydrogel synthesized using UV irradiation (UV-PLGA-PAA) exhibited a porous microstructure with submicron-sized hydrogel-rich aggregates and homogeneous chemical composition. Swelling behavior and IEC of this material were highly reproducible. Composite PLGA-PAA hydrogels synthesized using gamma irradiation (G-PLGA-PAAs) had a less uniform microstructure with larger pores and micron-sized hydrogel-rich aggregates while exhibiting rather inhomogeneous chemical composition. These materials showed superior swelling properties, but a more variable IEC, compared to the material fabricated using UV irradiation. Results of DSC analysis showed a dose-dependent decrease in glass transition temperature for G-PLGA-PAAs indicating the effects of PLGA chain scission. Our findings indicate that gamma irradiation is a possible alternative to UV irradiation in the synthesis of composite PLGA-PAA hydrogels which can modify or control important material properties. However, the synthesis protocol using gamma irradiation should be further optimized to improve the IEC reproducibility. In our future research, we will investigate the in vitro release of charged drugs from synthesized composite PLGA-PAA hydrogels under physiological conditions. © 2019 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties",
volume = "166",
pages = "108466",
doi = "10.1016/j.radphyschem.2019.108466"
}

Janićijević, Ž., Vujčić, I., Veljović, Đ. N., Vujisić, M. Lj.,& Radovanović, F.. (2020). Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties. in Radiation Physics and Chemistry, 166, 108466.
https://doi.org/10.1016/j.radphyschem.2019.108466

Janićijević Ž, Vujčić I, Veljović ĐN, Vujisić ML, Radovanović F. Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties. in Radiation Physics and Chemistry. 2020;166:108466.
doi:10.1016/j.radphyschem.2019.108466 .

Janićijević, Željko, Vujčić, Ivica, Veljović, Đorđe N., Vujisić, Miloš Lj., Radovanović, Filip, "Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties" in Radiation Physics and Chemistry, 166 (2020):108466,
https://doi.org/10.1016/j.radphyschem.2019.108466 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
AU  - Medić, Mina M.
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0969806X18307163
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8003
AB  - Fabrics made of wool, linen, silk, and cotton, which are used in the making of artifacts of cultural heritage, were divided into three groups. The first group wasn't dyed, the second group was dyed with natural dye (using sour cherry), and the third one was dyed with artificial aniline dye. For the conservation purposes, all samples were exposed at ambient temperature to gamma radiation doses, from 0.5 to 25 kGy, using a Co-60 irradiator. The influence of gamma irradiation treatment on the color changes was investigated. The obtained results revealed that the irradiation affects the color changes in all samples. All samples became more or less darker under the influence of gamma irradiation. This change in darkness is most pronounced in samples dyed with natural colors. Also, the highest differences in color change and darkness were observed in linen samples. © 2018 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts
VL  - 156
SP  - 307
EP  - 313
DO  - 10.1016/j.radphyschem.2018.12.001
ER  - 

@article{
author = "Vujčić, Ivica and Mašić, Slobodan and Medić, Mina M. and Milićević, Bojana R. and Dramićanin, Miroslav",
year = "2019",
abstract = "Fabrics made of wool, linen, silk, and cotton, which are used in the making of artifacts of cultural heritage, were divided into three groups. The first group wasn't dyed, the second group was dyed with natural dye (using sour cherry), and the third one was dyed with artificial aniline dye. For the conservation purposes, all samples were exposed at ambient temperature to gamma radiation doses, from 0.5 to 25 kGy, using a Co-60 irradiator. The influence of gamma irradiation treatment on the color changes was investigated. The obtained results revealed that the irradiation affects the color changes in all samples. All samples became more or less darker under the influence of gamma irradiation. This change in darkness is most pronounced in samples dyed with natural colors. Also, the highest differences in color change and darkness were observed in linen samples. © 2018 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts",
volume = "156",
pages = "307-313",
doi = "10.1016/j.radphyschem.2018.12.001"
}

Vujčić, I., Mašić, S., Medić, M. M., Milićević, B. R.,& Dramićanin, M.. (2019). The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts. in Radiation Physics and Chemistry, 156, 307-313.
https://doi.org/10.1016/j.radphyschem.2018.12.001

Vujčić I, Mašić S, Medić MM, Milićević BR, Dramićanin M. The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts. in Radiation Physics and Chemistry. 2019;156:307-313.
doi:10.1016/j.radphyschem.2018.12.001 .

Vujčić, Ivica, Mašić, Slobodan, Medić, Mina M., Milićević, Bojana R., Dramićanin, Miroslav, "The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts" in Radiation Physics and Chemistry, 156 (2019):307-313,
https://doi.org/10.1016/j.radphyschem.2018.12.001 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Gavrilović, Tamara V.
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Putić, Slaviša S.
AU  - Papan, Jelena
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0168583X18301666
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7669
AB  - Eu3+ activated LaPO4 phosphors were prepared by a high-temperature solid-state method and irradiated to different high-doses gamma-radiation in the 0-4 MGy range. No effects of high-doses of high-energy radiation on phosphor's morphology and structure were observed, as documented by electron microscopy and X-ray diffraction measurements. On the other hand, photoluminescence measurements showed that emission properties of phosphor were affected by gamma-radiation; changes in radiative properties being prominent for absorbed radiation doses up to 250 kGy after which no additional changes are observed. Judd-Ofelt analysis of emission spectra is performed to thoroughly investigate radiative properties of phosphors. Analysis showed that radiative transition probability of Eu3+ emission decreases while non-radiative probability increases upon gamma-irradiation. Quantum efficiency of emission is decreased from about 46% to 35% when Eu3+ doped LaPO4 powders are exposed to gamma-radiation of 250 kGy dose, showing no additional decrease for higher gamma-radiation doses.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor
VL  - 422
SP  - 85
EP  - 90
DO  - 10.1016/j.nimb.2018.03.002
ER  - 

@article{
author = "Vujčić, Ivica and Gavrilović, Tamara V. and Sekulić, Milica and Mašić, Slobodan and Putić, Slaviša S. and Papan, Jelena and Dramićanin, Miroslav",
year = "2018",
abstract = "Eu3+ activated LaPO4 phosphors were prepared by a high-temperature solid-state method and irradiated to different high-doses gamma-radiation in the 0-4 MGy range. No effects of high-doses of high-energy radiation on phosphor's morphology and structure were observed, as documented by electron microscopy and X-ray diffraction measurements. On the other hand, photoluminescence measurements showed that emission properties of phosphor were affected by gamma-radiation; changes in radiative properties being prominent for absorbed radiation doses up to 250 kGy after which no additional changes are observed. Judd-Ofelt analysis of emission spectra is performed to thoroughly investigate radiative properties of phosphors. Analysis showed that radiative transition probability of Eu3+ emission decreases while non-radiative probability increases upon gamma-irradiation. Quantum efficiency of emission is decreased from about 46% to 35% when Eu3+ doped LaPO4 powders are exposed to gamma-radiation of 250 kGy dose, showing no additional decrease for higher gamma-radiation doses.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor",
volume = "422",
pages = "85-90",
doi = "10.1016/j.nimb.2018.03.002"
}

Vujčić, I., Gavrilović, T. V., Sekulić, M., Mašić, S., Putić, S. S., Papan, J.,& Dramićanin, M.. (2018). Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 422, 85-90.
https://doi.org/10.1016/j.nimb.2018.03.002

Vujčić I, Gavrilović TV, Sekulić M, Mašić S, Putić SS, Papan J, Dramićanin M. Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2018;422:85-90.
doi:10.1016/j.nimb.2018.03.002 .

Vujčić, Ivica, Gavrilović, Tamara V., Sekulić, Milica, Mašić, Slobodan, Putić, Slaviša S., Papan, Jelena, Dramićanin, Miroslav, "Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 422 (2018):85-90,
https://doi.org/10.1016/j.nimb.2018.03.002 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Glais, Estelle
AU  - Vuković, Katarina
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Chaneac, Corinne
AU  - Dramićanin, Miroslav
AU  - Viana, Bruno
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925346718307262
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7956
AB  - (Y1-xLnx)2O3 oxides (Ln = Y, Gd, Lu) doped with Eu3+ ions are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3: Eu3+ powders with different particle sizes in the nanometric range are analyzed. Powders were prepared by polymer complex solution route, followed by annealing. Nanoparticles were obtained with an average size between 20 and 120 nm according to annealing conditions (time and temperature). Samples were exposed to gamma-irradiation (doses up to 4 MGy) on a commercial gamma-irradiation plant. The effect of irradiation on different nanoparticle size is followed by XRD, TEM and monitoring their luminescence properties. No change was observed in structure, morphology and steady-state emission. On the opposite after irradiation, excited-state lifetimes and quantum efficiency values are particle size dependent. © 2018 Elsevier B.V.
T2  - Optical Materials
T1  - Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes
VL  - 86
SP  - 582
EP  - 589
DO  - 10.1016/j.optmat.2018.10.049
ER  - 

@article{
author = "Vujčić, Ivica and Glais, Estelle and Vuković, Katarina and Sekulić, Milica and Mašić, Slobodan and Chaneac, Corinne and Dramićanin, Miroslav and Viana, Bruno",
year = "2018",
abstract = "(Y1-xLnx)2O3 oxides (Ln = Y, Gd, Lu) doped with Eu3+ ions are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3: Eu3+ powders with different particle sizes in the nanometric range are analyzed. Powders were prepared by polymer complex solution route, followed by annealing. Nanoparticles were obtained with an average size between 20 and 120 nm according to annealing conditions (time and temperature). Samples were exposed to gamma-irradiation (doses up to 4 MGy) on a commercial gamma-irradiation plant. The effect of irradiation on different nanoparticle size is followed by XRD, TEM and monitoring their luminescence properties. No change was observed in structure, morphology and steady-state emission. On the opposite after irradiation, excited-state lifetimes and quantum efficiency values are particle size dependent. © 2018 Elsevier B.V.",
journal = "Optical Materials",
title = "Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes",
volume = "86",
pages = "582-589",
doi = "10.1016/j.optmat.2018.10.049"
}

Vujčić, I., Glais, E., Vuković, K., Sekulić, M., Mašić, S., Chaneac, C., Dramićanin, M.,& Viana, B.. (2018). Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes. in Optical Materials, 86, 582-589.
https://doi.org/10.1016/j.optmat.2018.10.049

Vujčić I, Glais E, Vuković K, Sekulić M, Mašić S, Chaneac C, Dramićanin M, Viana B. Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes. in Optical Materials. 2018;86:582-589.
doi:10.1016/j.optmat.2018.10.049 .

Vujčić, Ivica, Glais, Estelle, Vuković, Katarina, Sekulić, Milica, Mašić, Slobodan, Chaneac, Corinne, Dramićanin, Miroslav, Viana, Bruno, "Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes" in Optical Materials, 86 (2018):582-589,
https://doi.org/10.1016/j.optmat.2018.10.049 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Gavrilović, Tamara V.
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
AU  - Đorđević, Vesna R.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7964
AB  - YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
T2  - Radiation Effects and Defects in Solids
T1  - Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors
VL  - 173
IS  - 11-12
SP  - 1054
EP  - 1067
DO  - 10.1080/10420150.2018.1539722
ER  - 

@article{
author = "Vujčić, Ivica and Gavrilović, Tamara V. and Sekulić, Milica and Mašić, Slobodan and Milićević, Bojana R. and Dramićanin, Miroslav and Đorđević, Vesna R.",
year = "2018",
abstract = "YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.",
journal = "Radiation Effects and Defects in Solids",
title = "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors",
volume = "173",
number = "11-12",
pages = "1054-1067",
doi = "10.1080/10420150.2018.1539722"
}

Vujčić, I., Gavrilović, T. V., Sekulić, M., Mašić, S., Milićević, B. R., Dramićanin, M.,& Đorđević, V. R.. (2018). Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids, 173(11-12), 1054-1067.
https://doi.org/10.1080/10420150.2018.1539722

Vujčić I, Gavrilović TV, Sekulić M, Mašić S, Milićević BR, Dramićanin M, Đorđević VR. Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids. 2018;173(11-12):1054-1067.
doi:10.1080/10420150.2018.1539722 .

Vujčić, Ivica, Gavrilović, Tamara V., Sekulić, Milica, Mašić, Slobodan, Milićević, Bojana R., Dramićanin, Miroslav, Đorđević, Vesna R., "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors" in Radiation Effects and Defects in Solids, 173, no. 11-12 (2018):1054-1067,
https://doi.org/10.1080/10420150.2018.1539722 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
AU  - Spasevska, Hristina
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=1451-39941800004V
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8121
AB  - Elhanol-chlorobenzene/oscillolilralor dosimetry system is widely used in controlling the irradiation process in gamma facilities. The elhanol-chlorobenzene dosimetry system provides a reliable means of measuring absorbed dose. It is based on a process of radiolytic formation of hydrochloric acid in aqueous elhanolic solutions of chlorobenzene by ionizing radiation. The irradiation temperature dependence of dosimeter response is a complex function of dose and temperature for each concentration of chlorobenzene. At different temperature the mobility of conducting species from hydrochloric acid is changed leading to dilTerenl oscillolilralor deflections during high-frequency conduclomelric readout. In this paper, we examined the influence of temperature on the calculation of the radiation dose. We showed that the temperature significantly influenced the measurement results, and that the calibration curve has to be formed at the irradiation temperature in order to obtain precise values of the absorbed dose. © 2018; Vinca Inst Nuclear Sci. All rights reserved.
T2  - Nuclear Technology and Radiation Protection
T1  - Accuracy in determining absorbed irradiation dose at different temperature measurements using ethanol chlorobenzene - oscillotitrator system
VL  - 33
IS  - 4
SP  - 363
EP  - 368
DO  - 10.2298/NTRP180316004V
ER  - 

@article{
author = "Vujčić, Ivica and Mašić, Slobodan and Spasevska, Hristina and Dramićanin, Miroslav",
year = "2018",
abstract = "Elhanol-chlorobenzene/oscillolilralor dosimetry system is widely used in controlling the irradiation process in gamma facilities. The elhanol-chlorobenzene dosimetry system provides a reliable means of measuring absorbed dose. It is based on a process of radiolytic formation of hydrochloric acid in aqueous elhanolic solutions of chlorobenzene by ionizing radiation. The irradiation temperature dependence of dosimeter response is a complex function of dose and temperature for each concentration of chlorobenzene. At different temperature the mobility of conducting species from hydrochloric acid is changed leading to dilTerenl oscillolilralor deflections during high-frequency conduclomelric readout. In this paper, we examined the influence of temperature on the calculation of the radiation dose. We showed that the temperature significantly influenced the measurement results, and that the calibration curve has to be formed at the irradiation temperature in order to obtain precise values of the absorbed dose. © 2018; Vinca Inst Nuclear Sci. All rights reserved.",
journal = "Nuclear Technology and Radiation Protection",
title = "Accuracy in determining absorbed irradiation dose at different temperature measurements using ethanol chlorobenzene - oscillotitrator system",
volume = "33",
number = "4",
pages = "363-368",
doi = "10.2298/NTRP180316004V"
}

Vujčić, I., Mašić, S., Spasevska, H.,& Dramićanin, M.. (2018). Accuracy in determining absorbed irradiation dose at different temperature measurements using ethanol chlorobenzene - oscillotitrator system. in Nuclear Technology and Radiation Protection, 33(4), 363-368.
https://doi.org/10.2298/NTRP180316004V

Vujčić I, Mašić S, Spasevska H, Dramićanin M. Accuracy in determining absorbed irradiation dose at different temperature measurements using ethanol chlorobenzene - oscillotitrator system. in Nuclear Technology and Radiation Protection. 2018;33(4):363-368.
doi:10.2298/NTRP180316004V .

Vujčić, Ivica, Mašić, Slobodan, Spasevska, Hristina, Dramićanin, Miroslav, "Accuracy in determining absorbed irradiation dose at different temperature measurements using ethanol chlorobenzene - oscillotitrator system" in Nuclear Technology and Radiation Protection, 33, no. 4 (2018):363-368,
https://doi.org/10.2298/NTRP180316004V . .