Petković, Branka

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orcid::0000-0001-7817-4092
  • Petković, Branka (4)
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Author's Bibliography

Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size

Samaržija-Jovanović, Suzana; Jovanović, Vojislav; Jovanović, Tijana; Kostić, Marija; Petković, Branka; Marković, Gordana; Marinović-Cincović, Milena

(2022)

TY  - JOUR
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Jovanović, Tijana
AU  - Kostić, Marija
AU  - Petković, Branka
AU  - Marković, Gordana
AU  - Marinović-Cincović, Milena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10193
AB  - Urea-formaldehyde (UF) composites with a formaldehyde/urea (FA/U) ratio = 0.8 and different particle sizes of montmorillonite (MMT), namely UF/KSF and UF/K10 were synthesized. The hydrolytic stability of modified UF composites was determined by measuring the content of the liberated formaldehyde of modified UF composites after acid hydrolysis. The synthesized modified UF composites were irradiated (50 kGy) and the effect of γ–irradiation was evaluated on the basis of these thermal behaviors. The thermal behavior was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetry (DTG), and differential thermal analysis (DTA) supported by data from Fourier transform infrared spectroscopy (FTIR). The minimum percentages of free (0.4%) and liberated (1.2%) formaldehyde were obtained in the UF/KSF composite. The modified UF/KSF composite shows better radiation resistance than the modified UF/K10 composite. The shift of temperature values for the selected mass losses (T5%) to higher temperatures indicates an increase in the thermal stability of the UF/K10 composite after γ–irradiation. γ–irradiation causes a decrease in the absorption intensity of bands in the FTIR spectrum of a modified UF/KSF composite and an increase in the absorption intensity of bands in the FTIR spectrum of a modified UF/K10 composite. © 2022 Elsevier Ltd
T2  - International Journal of Adhesion and Adhesives
T1  - Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size
VL  - 115
SP  - 103131
DO  - 10.1016/j.ijadhadh.2022.103131
ER  - 
@article{
author = "Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Jovanović, Tijana and Kostić, Marija and Petković, Branka and Marković, Gordana and Marinović-Cincović, Milena",
year = "2022",
abstract = "Urea-formaldehyde (UF) composites with a formaldehyde/urea (FA/U) ratio = 0.8 and different particle sizes of montmorillonite (MMT), namely UF/KSF and UF/K10 were synthesized. The hydrolytic stability of modified UF composites was determined by measuring the content of the liberated formaldehyde of modified UF composites after acid hydrolysis. The synthesized modified UF composites were irradiated (50 kGy) and the effect of γ–irradiation was evaluated on the basis of these thermal behaviors. The thermal behavior was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetry (DTG), and differential thermal analysis (DTA) supported by data from Fourier transform infrared spectroscopy (FTIR). The minimum percentages of free (0.4%) and liberated (1.2%) formaldehyde were obtained in the UF/KSF composite. The modified UF/KSF composite shows better radiation resistance than the modified UF/K10 composite. The shift of temperature values for the selected mass losses (T5%) to higher temperatures indicates an increase in the thermal stability of the UF/K10 composite after γ–irradiation. γ–irradiation causes a decrease in the absorption intensity of bands in the FTIR spectrum of a modified UF/KSF composite and an increase in the absorption intensity of bands in the FTIR spectrum of a modified UF/K10 composite. © 2022 Elsevier Ltd",
journal = "International Journal of Adhesion and Adhesives",
title = "Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size",
volume = "115",
pages = "103131",
doi = "10.1016/j.ijadhadh.2022.103131"
}
Samaržija-Jovanović, S., Jovanović, V., Jovanović, T., Kostić, M., Petković, B., Marković, G.,& Marinović-Cincović, M.. (2022). Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size. in International Journal of Adhesion and Adhesives, 115, 103131.
https://doi.org/10.1016/j.ijadhadh.2022.103131
Samaržija-Jovanović S, Jovanović V, Jovanović T, Kostić M, Petković B, Marković G, Marinović-Cincović M. Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size. in International Journal of Adhesion and Adhesives. 2022;115:103131.
doi:10.1016/j.ijadhadh.2022.103131 .
Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Jovanović, Tijana, Kostić, Marija, Petković, Branka, Marković, Gordana, Marinović-Cincović, Milena, "Hydrolytic, thermal and radiation stability of modified urea-formaldehyde composites: Influence of montmorillonite particle size" in International Journal of Adhesion and Adhesives, 115 (2022):103131,
https://doi.org/10.1016/j.ijadhadh.2022.103131 . .

Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites

Samaržija-Jovanović, Suzana; Jovanović, Vojislav; Petković, Branka; Jovanović, Tijana; Marković, Gordana; Porobić, Slavica; Papan, Jelena; Marinović-Cincović, Milena

(2020)

TY  - JOUR
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Petković, Branka
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Porobić, Slavica
AU  - Papan, Jelena
AU  - Marinović-Cincović, Milena
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9012
AB  - Urea-formaldehyde resin (F/U ratio of 0.8)/thermally activated montmorillonite (UF/Delta TK10) nanocomposite was synthesized. The hydrolytical, thermal, and UV radiation stability of UF/Delta TK10 nanocomposites are determined. UF hybrid nanocomposites have been irradiated with UV light with a wavelength of 254 nm and 366 nm, and after that, their radiation stability was evaluated. The free formaldehyde (FA) percentage in all prepared samples was determined. The sample was characterized by using X-ray diffraction analysis (XRD), nonisothermal thermogravimetric analysis (TGA), differential thermal analysis (DTA), and differential thermal gravimetry (DTG), with infrared (FTIR) spectroscopy. Crosslinked UF/Delta TK10 nanocomposite shows the highest resistance to acid hydrolysis after UV irradiation at a wavelength of 254 nm. The values for T-5% are identical for the unirradiated and UV irradiated (wavelength of 366 nm) UF/Delta TK10 nanocomposite. It can be concluded that this sample is thermally most stable and shows good resistance to UV irradiation.
T2  - Polymer Composites
T1  - Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites
VL  - 41
IS  - 9
SP  - 3575
EP  - 3584
DO  - 10.1002/pc.25644
ER  - 
@article{
author = "Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Petković, Branka and Jovanović, Tijana and Marković, Gordana and Porobić, Slavica and Papan, Jelena and Marinović-Cincović, Milena",
year = "2020",
abstract = "Urea-formaldehyde resin (F/U ratio of 0.8)/thermally activated montmorillonite (UF/Delta TK10) nanocomposite was synthesized. The hydrolytical, thermal, and UV radiation stability of UF/Delta TK10 nanocomposites are determined. UF hybrid nanocomposites have been irradiated with UV light with a wavelength of 254 nm and 366 nm, and after that, their radiation stability was evaluated. The free formaldehyde (FA) percentage in all prepared samples was determined. The sample was characterized by using X-ray diffraction analysis (XRD), nonisothermal thermogravimetric analysis (TGA), differential thermal analysis (DTA), and differential thermal gravimetry (DTG), with infrared (FTIR) spectroscopy. Crosslinked UF/Delta TK10 nanocomposite shows the highest resistance to acid hydrolysis after UV irradiation at a wavelength of 254 nm. The values for T-5% are identical for the unirradiated and UV irradiated (wavelength of 366 nm) UF/Delta TK10 nanocomposite. It can be concluded that this sample is thermally most stable and shows good resistance to UV irradiation.",
journal = "Polymer Composites",
title = "Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites",
volume = "41",
number = "9",
pages = "3575-3584",
doi = "10.1002/pc.25644"
}
Samaržija-Jovanović, S., Jovanović, V., Petković, B., Jovanović, T., Marković, G., Porobić, S., Papan, J.,& Marinović-Cincović, M.. (2020). Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites. in Polymer Composites, 41(9), 3575-3584.
https://doi.org/10.1002/pc.25644
Samaržija-Jovanović S, Jovanović V, Petković B, Jovanović T, Marković G, Porobić S, Papan J, Marinović-Cincović M. Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites. in Polymer Composites. 2020;41(9):3575-3584.
doi:10.1002/pc.25644 .
Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Petković, Branka, Jovanović, Tijana, Marković, Gordana, Porobić, Slavica, Papan, Jelena, Marinović-Cincović, Milena, "Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites" in Polymer Composites, 41, no. 9 (2020):3575-3584,
https://doi.org/10.1002/pc.25644 . .
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Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity

Zmejkoski, Danica; Petković, Branka; Pavkovic-Lucic, Sofija; Prolic, Zlatko; Anđelković, Marko; Savić, Tatjana

(2017)

TY  - JOUR
AU  - Zmejkoski, Danica
AU  - Petković, Branka
AU  - Pavkovic-Lucic, Sofija
AU  - Prolic, Zlatko
AU  - Anđelković, Marko
AU  - Savić, Tatjana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1540
AB  - Purpose: Extremely low frequency (ELF) magnetic fields as essential ecological factors may induce specific responses in genetically different lines. The object of this study was to investigate the impact of the ELF magnetic field on fitness components and locomotor activity of five Drosophila subobscura isofemale (IF) lines.Materials and methods: Each D. subobscura IF line, arbitrarily named: B16/1, B24/4, B39/1, B57/2 and B69/5, was maintained in five full-sib inbreeding generations. Their genetic structures were defined based on the mitochondrial DNA variability. Egg-first instar larvae and 1-day-old flies were exposed to an ELF magnetic field (50Hz, 0.5mT, 48h) and thereafter, fitness components and locomotor activity of males and females in an open field test were observed for each selected IF line, respectively.Results: Exposure of egg-first instar larvae to an ELF magnetic field shortened developmental time, and did not affect the viability and sex ratio of D. subobscura IF lines. Exposure of 1-day-old males and females IF lines B16/1 and B24/4 to an ELF magnetic field significantly decreased their locomotor activity and this effect lasted longer in females than males.Conclusions: These results indicate various responses of D. subobscura IF lines to the applied ELF magnetic field depending on their genetic background.
T2  - International Journal of Radiation Biology
T1  - Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity
VL  - 93
IS  - 5
SP  - 544
EP  - 552
DO  - 10.1080/09553002.2017.1268281
ER  - 
@article{
author = "Zmejkoski, Danica and Petković, Branka and Pavkovic-Lucic, Sofija and Prolic, Zlatko and Anđelković, Marko and Savić, Tatjana",
year = "2017",
abstract = "Purpose: Extremely low frequency (ELF) magnetic fields as essential ecological factors may induce specific responses in genetically different lines. The object of this study was to investigate the impact of the ELF magnetic field on fitness components and locomotor activity of five Drosophila subobscura isofemale (IF) lines.Materials and methods: Each D. subobscura IF line, arbitrarily named: B16/1, B24/4, B39/1, B57/2 and B69/5, was maintained in five full-sib inbreeding generations. Their genetic structures were defined based on the mitochondrial DNA variability. Egg-first instar larvae and 1-day-old flies were exposed to an ELF magnetic field (50Hz, 0.5mT, 48h) and thereafter, fitness components and locomotor activity of males and females in an open field test were observed for each selected IF line, respectively.Results: Exposure of egg-first instar larvae to an ELF magnetic field shortened developmental time, and did not affect the viability and sex ratio of D. subobscura IF lines. Exposure of 1-day-old males and females IF lines B16/1 and B24/4 to an ELF magnetic field significantly decreased their locomotor activity and this effect lasted longer in females than males.Conclusions: These results indicate various responses of D. subobscura IF lines to the applied ELF magnetic field depending on their genetic background.",
journal = "International Journal of Radiation Biology",
title = "Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity",
volume = "93",
number = "5",
pages = "544-552",
doi = "10.1080/09553002.2017.1268281"
}
Zmejkoski, D., Petković, B., Pavkovic-Lucic, S., Prolic, Z., Anđelković, M.,& Savić, T.. (2017). Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity. in International Journal of Radiation Biology, 93(5), 544-552.
https://doi.org/10.1080/09553002.2017.1268281
Zmejkoski D, Petković B, Pavkovic-Lucic S, Prolic Z, Anđelković M, Savić T. Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity. in International Journal of Radiation Biology. 2017;93(5):544-552.
doi:10.1080/09553002.2017.1268281 .
Zmejkoski, Danica, Petković, Branka, Pavkovic-Lucic, Sofija, Prolic, Zlatko, Anđelković, Marko, Savić, Tatjana, "Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50Hz, 0.5mT): fitness components and locomotor activity" in International Journal of Radiation Biology, 93, no. 5 (2017):544-552,
https://doi.org/10.1080/09553002.2017.1268281 . .
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Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests

Peric-Mataruga, Vesna; Petković, Branka; Ilijin, Larisa; Mrdakovic, Marija; Dronjak, Slađana; Todorović, Dajana; Vlahovic, Milena

(2017)

TY  - JOUR
AU  - Peric-Mataruga, Vesna
AU  - Petković, Branka
AU  - Ilijin, Larisa
AU  - Mrdakovic, Marija
AU  - Dronjak, Slađana
AU  - Todorović, Dajana
AU  - Vlahovic, Milena
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1705
AB  - Insects brain as a part of nervous system is the first-line of fast stress response that integrate stress signals to regulate all aspects of insect physiology and behaviour. The cadmium (Cd) bioaccumulation factor (BF), activity of the neurotoxicity biomarker acetylcholinesterase (AChE), dopamine content, expression and amount of Hsp70 in the brain and locomotor activity were evaluated in the 4th instar of Lymantria dispar L caterpillars fed a Cd supplemented diet and reared in an optimal temperature regime (23 degrees C) and/or exposed to high temperature (28 degrees C). The insects originated from two forests, one close to Nikola Tesla thermoelectric power plant, Obrenovac (polluted population), and the other Kosmaj mountain (less-polluted population, far from any industrial region). The Cd BF was higher in the less polluted than in the polluted population especially at the high ambient temperature. AChE activity and dopamine content were changed in the brains of L. dispar from both populations in the same manner. Hsp70 concentration in caterpillar brains showed opposite trends, a decrease in the less polluted and an increase in the polluted population. Locomotor activity was modified in both Lymantria dispar populations, but the pattern of changes depended on the stressors and their combined effect. ACh activity and dopamine content are sensitive parameters to Cd exposure, regardless of pollutant experience, and might be promising biomarkers in monitoring forest ecosystems. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Chemosphere
T1  - Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests
VL  - 185
SP  - 628
EP  - 636
DO  - 10.1016/j.chemosphere.2017.07.050
ER  - 
@article{
author = "Peric-Mataruga, Vesna and Petković, Branka and Ilijin, Larisa and Mrdakovic, Marija and Dronjak, Slađana and Todorović, Dajana and Vlahovic, Milena",
year = "2017",
abstract = "Insects brain as a part of nervous system is the first-line of fast stress response that integrate stress signals to regulate all aspects of insect physiology and behaviour. The cadmium (Cd) bioaccumulation factor (BF), activity of the neurotoxicity biomarker acetylcholinesterase (AChE), dopamine content, expression and amount of Hsp70 in the brain and locomotor activity were evaluated in the 4th instar of Lymantria dispar L caterpillars fed a Cd supplemented diet and reared in an optimal temperature regime (23 degrees C) and/or exposed to high temperature (28 degrees C). The insects originated from two forests, one close to Nikola Tesla thermoelectric power plant, Obrenovac (polluted population), and the other Kosmaj mountain (less-polluted population, far from any industrial region). The Cd BF was higher in the less polluted than in the polluted population especially at the high ambient temperature. AChE activity and dopamine content were changed in the brains of L. dispar from both populations in the same manner. Hsp70 concentration in caterpillar brains showed opposite trends, a decrease in the less polluted and an increase in the polluted population. Locomotor activity was modified in both Lymantria dispar populations, but the pattern of changes depended on the stressors and their combined effect. ACh activity and dopamine content are sensitive parameters to Cd exposure, regardless of pollutant experience, and might be promising biomarkers in monitoring forest ecosystems. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Chemosphere",
title = "Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests",
volume = "185",
pages = "628-636",
doi = "10.1016/j.chemosphere.2017.07.050"
}
Peric-Mataruga, V., Petković, B., Ilijin, L., Mrdakovic, M., Dronjak, S., Todorović, D.,& Vlahovic, M.. (2017). Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests. in Chemosphere, 185, 628-636.
https://doi.org/10.1016/j.chemosphere.2017.07.050
Peric-Mataruga V, Petković B, Ilijin L, Mrdakovic M, Dronjak S, Todorović D, Vlahovic M. Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests. in Chemosphere. 2017;185:628-636.
doi:10.1016/j.chemosphere.2017.07.050 .
Peric-Mataruga, Vesna, Petković, Branka, Ilijin, Larisa, Mrdakovic, Marija, Dronjak, Slađana, Todorović, Dajana, Vlahovic, Milena, "Cadmium and high temperature effects on brain and behaviour of Lymantria dispar L. caterpillars originating from polluted and less-polluted forests" in Chemosphere, 185 (2017):628-636,
https://doi.org/10.1016/j.chemosphere.2017.07.050 . .
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