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  - 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  - 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  - 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 . .