TY  - JOUR
AU  - Popović, Aleksandar R.
AU  - Anđelković, Boban D.
AU  - Đorđević, Dragana
AU  - Sakan, Sanja
AU  - Vujisić, Ljubodrag V.
AU  - Veličković, Sava
AU  - Relić, Dubravka
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5231
AB  - In order to further define the potential use of FTIR-ATR spectroscopy, as a non-destructive and reliable technique, for the analysis of the characteristics of post stamps, certified originals of the Principality of Serbia stamps (“Prince Michael issues”) issued in 1866 and 1868 as well as their forgeries were ana­lyzed. Spectra enabling the comparison of the paper, dye and glue of stamps of so-called “Vienna issues”, having denominations of 10 (orange-yellow), 20 (pink) and 40 para (blue) and “Belgrade issues” (1 para-green and 2 para-reddish brown), as well as 24 expert-certified forgeries, were taken. It was shown that the applied technology was, in most of the cases, a fast and suitable technique for establishing clear differences between the spectral characteristics of the paper and dye used for the original stamps, and forgeries that were most probably made decades after the printing of the genuine stamps. The differences between print­ings of the same issues of the genuine stamps were also elaborated. It is pro­posed, for the first time in philatelic history, the possibility that “Vienna issues” stamps may have been printed on two different papers, and, having in mind the technology of printing in the 19th century, potentially, not even at the same time or in the same printing house.
PB  - Belgrade : Serbian chemical society
T2  - Journal of the Serbian Chemical Society
T1  - To Professor Petar Pfendt, In calidum, et plurium retributivus memoriae: FTIR-ATR analysis of post stamps of the Principality of Serbia issued in 1866 and 1868 and their forgeries
VL  - 87
IS  - 1
SP  - 27
EP  - 40
DO  - 10.2298/JSC210901090P
ER  - 

@article{
author = "Popović, Aleksandar R. and Anđelković, Boban D. and Đorđević, Dragana and Sakan, Sanja and Vujisić, Ljubodrag V. and Veličković, Sava and Relić, Dubravka",
year = "2022",
abstract = "In order to further define the potential use of FTIR-ATR spectroscopy, as a non-destructive and reliable technique, for the analysis of the characteristics of post stamps, certified originals of the Principality of Serbia stamps (“Prince Michael issues”) issued in 1866 and 1868 as well as their forgeries were ana­lyzed. Spectra enabling the comparison of the paper, dye and glue of stamps of so-called “Vienna issues”, having denominations of 10 (orange-yellow), 20 (pink) and 40 para (blue) and “Belgrade issues” (1 para-green and 2 para-reddish brown), as well as 24 expert-certified forgeries, were taken. It was shown that the applied technology was, in most of the cases, a fast and suitable technique for establishing clear differences between the spectral characteristics of the paper and dye used for the original stamps, and forgeries that were most probably made decades after the printing of the genuine stamps. The differences between print­ings of the same issues of the genuine stamps were also elaborated. It is pro­posed, for the first time in philatelic history, the possibility that “Vienna issues” stamps may have been printed on two different papers, and, having in mind the technology of printing in the 19th century, potentially, not even at the same time or in the same printing house.",
publisher = "Belgrade : Serbian chemical society",
journal = "Journal of the Serbian Chemical Society",
title = "To Professor Petar Pfendt, In calidum, et plurium retributivus memoriae: FTIR-ATR analysis of post stamps of the Principality of Serbia issued in 1866 and 1868 and their forgeries",
volume = "87",
number = "1",
pages = "27-40",
doi = "10.2298/JSC210901090P"
}

Popović, A. R., Anđelković, B. D., Đorđević, D., Sakan, S., Vujisić, L. V., Veličković, S.,& Relić, D.. (2022). To Professor Petar Pfendt, In calidum, et plurium retributivus memoriae: FTIR-ATR analysis of post stamps of the Principality of Serbia issued in 1866 and 1868 and their forgeries. in Journal of the Serbian Chemical Society
Belgrade : Serbian chemical society., 87(1), 27-40.
https://doi.org/10.2298/JSC210901090P

Popović AR, Anđelković BD, Đorđević D, Sakan S, Vujisić LV, Veličković S, Relić D. To Professor Petar Pfendt, In calidum, et plurium retributivus memoriae: FTIR-ATR analysis of post stamps of the Principality of Serbia issued in 1866 and 1868 and their forgeries. in Journal of the Serbian Chemical Society. 2022;87(1):27-40.
doi:10.2298/JSC210901090P .

Popović, Aleksandar R., Anđelković, Boban D., Đorđević, Dragana, Sakan, Sanja, Vujisić, Ljubodrag V., Veličković, Sava, Relić, Dubravka, "To Professor Petar Pfendt, In calidum, et plurium retributivus memoriae: FTIR-ATR analysis of post stamps of the Principality of Serbia issued in 1866 and 1868 and their forgeries" in Journal of the Serbian Chemical Society, 87, no. 1 (2022):27-40,
https://doi.org/10.2298/JSC210901090P . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Kalagasidis Krušić, Melina
AU  - Veličković, Sava J.
AU  - Avolio, Roberto
AU  - Santagata, Gabriella
AU  - Malinconico, Mario
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2473
AB  - The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.
PB  - Elsevier
T2  - Food Hydrocolloids
T1  - Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation
VL  - 77
SP  - 494
EP  - 501
DO  - 10.1016/j.foodhyd.2017.10.027
ER  - 

@article{
author = "Šešlija, Sanja and Nešić, Aleksandra and Ružić, Jovana and Kalagasidis Krušić, Melina and Veličković, Sava J. and Avolio, Roberto and Santagata, Gabriella and Malinconico, Mario",
year = "2018",
abstract = "The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.",
publisher = "Elsevier",
journal = "Food Hydrocolloids",
title = "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation",
volume = "77",
pages = "494-501",
doi = "10.1016/j.foodhyd.2017.10.027"
}

Šešlija, S., Nešić, A., Ružić, J., Kalagasidis Krušić, M., Veličković, S. J., Avolio, R., Santagata, G.,& Malinconico, M.. (2018). Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids
Elsevier., 77, 494-501.
https://doi.org/10.1016/j.foodhyd.2017.10.027

Šešlija S, Nešić A, Ružić J, Kalagasidis Krušić M, Veličković SJ, Avolio R, Santagata G, Malinconico M. Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids. 2018;77:494-501.
doi:10.1016/j.foodhyd.2017.10.027 .

Šešlija, Sanja, Nešić, Aleksandra, Ružić, Jovana, Kalagasidis Krušić, Melina, Veličković, Sava J., Avolio, Roberto, Santagata, Gabriella, Malinconico, Mario, "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation" in Food Hydrocolloids, 77 (2018):494-501,
https://doi.org/10.1016/j.foodhyd.2017.10.027 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Kalagasidis Krušić, Melina
AU  - Veličković, Sava
AU  - Avolio, Roberto
AU  - Santagata, Gabriella
AU  - Malinconico, Mario
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4289
AB  - The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.
PB  - Elsevier
T2  - Food Hydrocolloids
T1  - Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation
VL  - 77
SP  - 494
EP  - 501
DO  - 10.1016/j.foodhyd.2017.10.027
ER  - 

@article{
author = "Šešlija, Sanja and Nešić, Aleksandra and Ružić, Jovana and Kalagasidis Krušić, Melina and Veličković, Sava and Avolio, Roberto and Santagata, Gabriella and Malinconico, Mario",
year = "2018",
abstract = "The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.",
publisher = "Elsevier",
journal = "Food Hydrocolloids",
title = "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation",
volume = "77",
pages = "494-501",
doi = "10.1016/j.foodhyd.2017.10.027"
}

Šešlija, S., Nešić, A., Ružić, J., Kalagasidis Krušić, M., Veličković, S., Avolio, R., Santagata, G.,& Malinconico, M.. (2018). Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids
Elsevier., 77, 494-501.
https://doi.org/10.1016/j.foodhyd.2017.10.027

Šešlija S, Nešić A, Ružić J, Kalagasidis Krušić M, Veličković S, Avolio R, Santagata G, Malinconico M. Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids. 2018;77:494-501.
doi:10.1016/j.foodhyd.2017.10.027 .

Šešlija, Sanja, Nešić, Aleksandra, Ružić, Jovana, Kalagasidis Krušić, Melina, Veličković, Sava, Avolio, Roberto, Santagata, Gabriella, Malinconico, Mario, "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation" in Food Hydrocolloids, 77 (2018):494-501,
https://doi.org/10.1016/j.foodhyd.2017.10.027 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Veljović, Đorđe
AU  - Kalagasidis Krušić, Melina
AU  - Stevanović, Jasmina
AU  - Veličković, Sava J.
AU  - Popović, Ivanka G.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1968
AB  - The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.
PB  - Royal Soc Chemistry, Cambridge
T2  - New Journal of Chemistry
T1  - Cross-linking of highly methoxylated pectin with copper: the specific anion influence
VL  - 40
IS  - 2
SP  - 1618
EP  - 1625
DO  - 10.1039/c5nj03320a
ER  - 

@article{
author = "Šešlija, Sanja and Veljović, Đorđe and Kalagasidis Krušić, Melina and Stevanović, Jasmina and Veličković, Sava J. and Popović, Ivanka G.",
year = "2016",
abstract = "The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "New Journal of Chemistry",
title = "Cross-linking of highly methoxylated pectin with copper: the specific anion influence",
volume = "40",
number = "2",
pages = "1618-1625",
doi = "10.1039/c5nj03320a"
}

Šešlija, S., Veljović, Đ., Kalagasidis Krušić, M., Stevanović, J., Veličković, S. J.,& Popović, I. G.. (2016). Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry
Royal Soc Chemistry, Cambridge., 40(2), 1618-1625.
https://doi.org/10.1039/c5nj03320a

Šešlija S, Veljović Đ, Kalagasidis Krušić M, Stevanović J, Veličković SJ, Popović IG. Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry. 2016;40(2):1618-1625.
doi:10.1039/c5nj03320a .

Šešlija, Sanja, Veljović, Đorđe, Kalagasidis Krušić, Melina, Stevanović, Jasmina, Veličković, Sava J., Popović, Ivanka G., "Cross-linking of highly methoxylated pectin with copper: the specific anion influence" in New Journal of Chemistry, 40, no. 2 (2016):1618-1625,
https://doi.org/10.1039/c5nj03320a . .

TY  - JOUR
AU  - Spasojević, Pavle
AU  - Zrilić, Milorad
AU  - Panić, Vesna
AU  - Stamenkovic, Dragoslav
AU  - Šešlija, Sanja
AU  - Veličković, Sava J.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1634
AB  - This study investigates a wide range of clinically relevant mechanical properties of poly(methyl methacrylate) (PMMA) denture base materials modified with di-methyl itaconate (DMI) and di-n-butyl itaconate (DBI) in order to compare them to a commercial PMMA denture base material. The commercial denture base formulation was modified with DMI and DBI by replacing up to 10 wt% of methyl methacrylate (MMA) monomer. The specimens were prepared by standard bath curing process. The influence of the itaconate content on hardness, impact strength, tensile, and thermal and dynamic mechanical properties was investigated. It is found that the addition of di-n-alkyl itaconates gives homogenous blends that show decreased glass transition temperature, as well as decrease in storage modulus, ultimate tensile strength, and impact fracture resistance with increase in the itaconate content. The mean values of surface hardness show no significant change with the addition of itaconates. The magnitude of the measured values indicates that the poly(methyl methacrylate) (PMMA) denture base material modified with itaconates could be developed into a less toxic, more environmentally and patient friendly product than commercial pure PMMA denture base material.
PB  - Hindawi Limited
T2  - International Journal of Polymer Science
T1  - The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate
DO  - 10.1155/2015/561012
ER  - 

@article{
author = "Spasojević, Pavle and Zrilić, Milorad and Panić, Vesna and Stamenkovic, Dragoslav and Šešlija, Sanja and Veličković, Sava J.",
year = "2015",
abstract = "This study investigates a wide range of clinically relevant mechanical properties of poly(methyl methacrylate) (PMMA) denture base materials modified with di-methyl itaconate (DMI) and di-n-butyl itaconate (DBI) in order to compare them to a commercial PMMA denture base material. The commercial denture base formulation was modified with DMI and DBI by replacing up to 10 wt% of methyl methacrylate (MMA) monomer. The specimens were prepared by standard bath curing process. The influence of the itaconate content on hardness, impact strength, tensile, and thermal and dynamic mechanical properties was investigated. It is found that the addition of di-n-alkyl itaconates gives homogenous blends that show decreased glass transition temperature, as well as decrease in storage modulus, ultimate tensile strength, and impact fracture resistance with increase in the itaconate content. The mean values of surface hardness show no significant change with the addition of itaconates. The magnitude of the measured values indicates that the poly(methyl methacrylate) (PMMA) denture base material modified with itaconates could be developed into a less toxic, more environmentally and patient friendly product than commercial pure PMMA denture base material.",
publisher = "Hindawi Limited",
journal = "International Journal of Polymer Science",
title = "The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate",
doi = "10.1155/2015/561012"
}

Spasojević, P., Zrilić, M., Panić, V., Stamenkovic, D., Šešlija, S.,& Veličković, S. J.. (2015). The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate. in International Journal of Polymer Science
Hindawi Limited..
https://doi.org/10.1155/2015/561012

Spasojević P, Zrilić M, Panić V, Stamenkovic D, Šešlija S, Veličković SJ. The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate. in International Journal of Polymer Science. 2015;.
doi:10.1155/2015/561012 .

Spasojević, Pavle, Zrilić, Milorad, Panić, Vesna, Stamenkovic, Dragoslav, Šešlija, Sanja, Veličković, Sava J., "The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate" in International Journal of Polymer Science (2015),
https://doi.org/10.1155/2015/561012 . .

TY  - JOUR
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Nikolić, Vladimir
AU  - Popović, Ivanka G.
AU  - Veličković, Sava J.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1828
AB  - The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain materials with lower toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plant products. A commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), whereby the ratio of DTHFI was varied from 2.5 to 10 % by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effects of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) were investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, which made these materials less toxic. It was shown that increasing the DTHFI content resulted in materials with decreased glass transition temperatures, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance; however the mechanical properties were in the rang prescribed by ADA standards, and the materials could be used in practice. The deterioration in mechanical properties was therefore worthwhile in order to gain lower toxicity of the leached monomer.
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties
VL  - 80
IS  - 9
SP  - 1177
DO  - 10.2298/JSC150123034S
ER  - 

@article{
author = "Spasojević, Pavle and Panić, Vesna and Šešlija, Sanja and Nikolić, Vladimir and Popović, Ivanka G. and Veličković, Sava J.",
year = "2015",
abstract = "The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain materials with lower toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plant products. A commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), whereby the ratio of DTHFI was varied from 2.5 to 10 % by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effects of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) were investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, which made these materials less toxic. It was shown that increasing the DTHFI content resulted in materials with decreased glass transition temperatures, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance; however the mechanical properties were in the rang prescribed by ADA standards, and the materials could be used in practice. The deterioration in mechanical properties was therefore worthwhile in order to gain lower toxicity of the leached monomer.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties",
volume = "80",
number = "9",
pages = "1177",
doi = "10.2298/JSC150123034S"
}

Spasojević, P., Panić, V., Šešlija, S., Nikolić, V., Popović, I. G.,& Veličković, S. J.. (2015). Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties. in Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 80(9), 1177.
https://doi.org/10.2298/JSC150123034S

Spasojević P, Panić V, Šešlija S, Nikolić V, Popović IG, Veličković SJ. Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties. in Journal of the Serbian Chemical Society. 2015;80(9):1177.
doi:10.2298/JSC150123034S .

Spasojević, Pavle, Panić, Vesna, Šešlija, Sanja, Nikolić, Vladimir, Popović, Ivanka G., Veličković, Sava J., "Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties" in Journal of the Serbian Chemical Society, 80, no. 9 (2015):1177,
https://doi.org/10.2298/JSC150123034S . .

TY  - DATA
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Tomković, Tanja
AU  - Vasiljević-Radović, Dana
AU  - Nešić, Aleksandra
AU  - Veličković, Sava
AU  - Onjia, Antonije
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7533
AB  - Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.
PB  - Elsevier, Amsterdam
T2  - Reactive & Functional Polymers
T1  - Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007
UR  - https://hdl.handle.net/21.15107/rcub_cer_7533
ER  - 

@misc{
author = "Radovanović, Filip and Nastasović, Aleksandra and Tomković, Tanja and Vasiljević-Radović, Dana and Nešić, Aleksandra and Veličković, Sava and Onjia, Antonije",
year = "2014",
abstract = "Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Reactive & Functional Polymers",
title = "Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007",
url = "https://hdl.handle.net/21.15107/rcub_cer_7533"
}

Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S.,& Onjia, A.. (2014). Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007. in Reactive & Functional Polymers
Elsevier, Amsterdam..
https://hdl.handle.net/21.15107/rcub_cer_7533

Radovanović F, Nastasović A, Tomković T, Vasiljević-Radović D, Nešić A, Veličković S, Onjia A. Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007. in Reactive & Functional Polymers. 2014;.
https://hdl.handle.net/21.15107/rcub_cer_7533 .

Radovanović, Filip, Nastasović, Aleksandra, Tomković, Tanja, Vasiljević-Radović, Dana, Nešić, Aleksandra, Veličković, Sava, Onjia, Antonije, "Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007" in Reactive & Functional Polymers (2014),
https://hdl.handle.net/21.15107/rcub_cer_7533 .

TY  - JOUR
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Tomković, Tanja
AU  - Vasiljević-Radović, Dana
AU  - Nešić, Aleksandra
AU  - Veličković, Sava J.
AU  - Onjia, Antonije E.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1517
AB  - Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.
PB  - Elsevier
T2  - Reactive and Functional Polymers
T1  - Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate
VL  - 77
SP  - 1
EP  - 10
DO  - 10.1016/j.reactfunctpolym.2014.01.007
ER  - 

@article{
author = "Radovanović, Filip and Nastasović, Aleksandra and Tomković, Tanja and Vasiljević-Radović, Dana and Nešić, Aleksandra and Veličković, Sava J. and Onjia, Antonije E.",
year = "2014",
abstract = "Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.",
publisher = "Elsevier",
journal = "Reactive and Functional Polymers",
title = "Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate",
volume = "77",
pages = "1-10",
doi = "10.1016/j.reactfunctpolym.2014.01.007"
}

Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S. J.,& Onjia, A. E.. (2014). Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. in Reactive and Functional Polymers
Elsevier., 77, 1-10.
https://doi.org/10.1016/j.reactfunctpolym.2014.01.007

Radovanović F, Nastasović A, Tomković T, Vasiljević-Radović D, Nešić A, Veličković SJ, Onjia AE. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. in Reactive and Functional Polymers. 2014;77:1-10.
doi:10.1016/j.reactfunctpolym.2014.01.007 .

Radovanović, Filip, Nastasović, Aleksandra, Tomković, Tanja, Vasiljević-Radović, Dana, Nešić, Aleksandra, Veličković, Sava J., Onjia, Antonije E., "Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate" in Reactive and Functional Polymers, 77 (2014):1-10,
https://doi.org/10.1016/j.reactfunctpolym.2014.01.007 . .

TY  - JOUR
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Veličković, Sava
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7490
AB  - The use of polymeric adsorbents for the removal of azo dyes from solution has been reviewed. Adsorption techniques are widely used to remove certain classes of pollutants from waters, especially those which are not easily biodegradable. The removal of azo dyes as pollutants from wastewaters of textile, paper, printing, leather, pharmaceutical and other industries has been addressed by the researchers. The wider use of already available adsorbents is restricted due to their high costs which lead to investigation and development of new materials that can be cheaper, eficient and easy regenerated. The aim of this article is to present to the readers the widespread investigations in recent years of synthetic and natural polymers as adsorbents and potential replacement of conventional adsorbents. This review presents only the data obtained using raw, hydrogel, grafted and crosslinked forms of synthetic and nature based polymers, and the discussion is limited to these polymer-based materials and their adsorption properties.
AB  - Intenzivan industrijski razvoj praćen je sve većom količinom otpadnih voda, što u smislu zaštite životne sredine i održivog razvoja nalaže potrebu poboljšanja postojećih i uvođenje novih postupaka obrade otpadnih voda. Posebnu naučno-tehnološku pažnju zahtevaju azo boje, koje su veoma toksične i u prirodi veoma teško razgradive. Azo boje su podložne bioakumulaciji, a zbog kancerogenih i mutagenih svojstava neretko su pretnja zdravlju ljudi i očuvanju okoline. Primenu fizičko-hemijskih metoda za uklanjanje azo-boja iz otpadnih voda često ograničavaju visoke cene, potrebe za odlaganjem nastalog štetnog mulja ili nastanak toksičnih sastojaka razgradnje. Adsorpcija je jedna od najzastupljenijih metoda za uklanjanje raznih zagađivača iz otpadnih voda zbog jednostavnosti, ekonomičnosti i efikasnosti ove metode. S obzirom da su konvencionalni adsorbenti, kao što je aktivni ugalj, veoma skupi, u poslednje vreme se sve više ulaže u ispitivanja i razvoj novih materijala za uklanjanje zagadjivača iz otpadnih voda koji će biti lako razgradivi, netoksični, jeftini i efikasni u njihovom uklanjanju. U ovom radu biće prikazan pregled iz literature polimernih materijala za uklanjanje azo boja iz otpadnih voda. Polimerni materijali pokazuju prednosti u odnosu na konvencio-nalne adsrobente zbog jednostavne upotrebe i rukovanja s njima i mogućnosti oblikovanja u pogodne i željene forme. Adsorpcija na polimernim materijalima je najčešće reverzibilan proces, što nije slučaj kod konvencionalnih adsorbenta. Adsorbovana boja na polimernim materijalima, u zavisnosti od tipa boje, se lako može desorbovati u kiseloj ili alkalnoj sredini, kao i u acetonu, tako da se materijal može regenerisati i ponovo koristiti za uklanjanje boja iz otpadnih voda. U ovom radu će biti prikazani sintetički i prirodni polimeri u formi hidrogela, umreženih i kalemljenih sistema za uklanjanje azo boja. Takodje, prikazan je efekat različitih parametara kao što su koncentracija, pH i temperatura rastvora boje, na adsorpciju na polimernim materijalima.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Adsorption of azo dyes on polymer materials
T1  - Adsorpcija azo boja na polimernim materijalima
VL  - 67
IS  - 6
SP  - 881
EP  - 900
DO  - 10.2298/HEMIND121203020P
ER  - 

@article{
author = "Panić, Vesna and Šešlija, Sanja and Nešić, Aleksandra and Veličković, Sava",
year = "2013",
abstract = "The use of polymeric adsorbents for the removal of azo dyes from solution has been reviewed. Adsorption techniques are widely used to remove certain classes of pollutants from waters, especially those which are not easily biodegradable. The removal of azo dyes as pollutants from wastewaters of textile, paper, printing, leather, pharmaceutical and other industries has been addressed by the researchers. The wider use of already available adsorbents is restricted due to their high costs which lead to investigation and development of new materials that can be cheaper, eficient and easy regenerated. The aim of this article is to present to the readers the widespread investigations in recent years of synthetic and natural polymers as adsorbents and potential replacement of conventional adsorbents. This review presents only the data obtained using raw, hydrogel, grafted and crosslinked forms of synthetic and nature based polymers, and the discussion is limited to these polymer-based materials and their adsorption properties., Intenzivan industrijski razvoj praćen je sve većom količinom otpadnih voda, što u smislu zaštite životne sredine i održivog razvoja nalaže potrebu poboljšanja postojećih i uvođenje novih postupaka obrade otpadnih voda. Posebnu naučno-tehnološku pažnju zahtevaju azo boje, koje su veoma toksične i u prirodi veoma teško razgradive. Azo boje su podložne bioakumulaciji, a zbog kancerogenih i mutagenih svojstava neretko su pretnja zdravlju ljudi i očuvanju okoline. Primenu fizičko-hemijskih metoda za uklanjanje azo-boja iz otpadnih voda često ograničavaju visoke cene, potrebe za odlaganjem nastalog štetnog mulja ili nastanak toksičnih sastojaka razgradnje. Adsorpcija je jedna od najzastupljenijih metoda za uklanjanje raznih zagađivača iz otpadnih voda zbog jednostavnosti, ekonomičnosti i efikasnosti ove metode. S obzirom da su konvencionalni adsorbenti, kao što je aktivni ugalj, veoma skupi, u poslednje vreme se sve više ulaže u ispitivanja i razvoj novih materijala za uklanjanje zagadjivača iz otpadnih voda koji će biti lako razgradivi, netoksični, jeftini i efikasni u njihovom uklanjanju. U ovom radu biće prikazan pregled iz literature polimernih materijala za uklanjanje azo boja iz otpadnih voda. Polimerni materijali pokazuju prednosti u odnosu na konvencio-nalne adsrobente zbog jednostavne upotrebe i rukovanja s njima i mogućnosti oblikovanja u pogodne i željene forme. Adsorpcija na polimernim materijalima je najčešće reverzibilan proces, što nije slučaj kod konvencionalnih adsorbenta. Adsorbovana boja na polimernim materijalima, u zavisnosti od tipa boje, se lako može desorbovati u kiseloj ili alkalnoj sredini, kao i u acetonu, tako da se materijal može regenerisati i ponovo koristiti za uklanjanje boja iz otpadnih voda. U ovom radu će biti prikazani sintetički i prirodni polimeri u formi hidrogela, umreženih i kalemljenih sistema za uklanjanje azo boja. Takodje, prikazan je efekat različitih parametara kao što su koncentracija, pH i temperatura rastvora boje, na adsorpciju na polimernim materijalima.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Adsorption of azo dyes on polymer materials, Adsorpcija azo boja na polimernim materijalima",
volume = "67",
number = "6",
pages = "881-900",
doi = "10.2298/HEMIND121203020P"
}

Panić, V., Šešlija, S., Nešić, A.,& Veličković, S.. (2013). Adsorption of azo dyes on polymer materials. in Hemijska industrija
Association of Chemical Engineers of Serbia., 67(6), 881-900.
https://doi.org/10.2298/HEMIND121203020P

Panić V, Šešlija S, Nešić A, Veličković S. Adsorption of azo dyes on polymer materials. in Hemijska industrija. 2013;67(6):881-900.
doi:10.2298/HEMIND121203020P .

Panić, Vesna, Šešlija, Sanja, Nešić, Aleksandra, Veličković, Sava, "Adsorption of azo dyes on polymer materials" in Hemijska industrija, 67, no. 6 (2013):881-900,
https://doi.org/10.2298/HEMIND121203020P . .

TY  - CONF
AU  - Radovanović, Filip
AU  - Tomković, Tanja
AU  - Nastasović, Aleksandra
AU  - Veličković, Sava
AU  - Nešić, Aleksandra
AU  - Onjia, Antonije E.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/796
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2841
AB  - Polyethersulfone (PES) is frequently used for high-performance ultrafiltration membranes. Functionalization of PES membranes is required to introduce new groups for specific applications, such as affinity membranes for bioseparations [1]. Functionalization methods include bulk modification of PES material, blending of PES with another material, or surface modification of PES membranes [2]. In this work a novel method for introducing functional groups in asymmetric PES membranes is presented [3]. A cast film comprising PES, glycidyl methacrylate (GMA) and a common solvent was exposed to UV irradiation to form a gel of crosslinked polyGMA. The gel was then immersed in a water bath to create an asymmetric membrane with crosslinked polyGMA particles, as shown in Fig. 1. A simple treatment of these membranes with diethylene triamine was used to open the epoxide rings in polyGMA particles and introduce amine functional groups. The effects of monomer concentrations on the properties and separation performance of these novel membrane adsorbers will be presented.
PB  - Belgrade : Serbian Chemical Society
C3  - 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts
T1  - Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles
SP  - 128
EP  - 128
UR  - https://hdl.handle.net/21.15107/rcub_dais_796
ER  - 

@conference{
author = "Radovanović, Filip and Tomković, Tanja and Nastasović, Aleksandra and Veličković, Sava and Nešić, Aleksandra and Onjia, Antonije E.",
year = "2013",
abstract = "Polyethersulfone (PES) is frequently used for high-performance ultrafiltration membranes. Functionalization of PES membranes is required to introduce new groups for specific applications, such as affinity membranes for bioseparations [1]. Functionalization methods include bulk modification of PES material, blending of PES with another material, or surface modification of PES membranes [2]. In this work a novel method for introducing functional groups in asymmetric PES membranes is presented [3]. A cast film comprising PES, glycidyl methacrylate (GMA) and a common solvent was exposed to UV irradiation to form a gel of crosslinked polyGMA. The gel was then immersed in a water bath to create an asymmetric membrane with crosslinked polyGMA particles, as shown in Fig. 1. A simple treatment of these membranes with diethylene triamine was used to open the epoxide rings in polyGMA particles and introduce amine functional groups. The effects of monomer concentrations on the properties and separation performance of these novel membrane adsorbers will be presented.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts",
title = "Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles",
pages = "128-128",
url = "https://hdl.handle.net/21.15107/rcub_dais_796"
}

Radovanović, F., Tomković, T., Nastasović, A., Veličković, S., Nešić, A.,& Onjia, A. E.. (2013). Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts
Belgrade : Serbian Chemical Society., 128-128.
https://hdl.handle.net/21.15107/rcub_dais_796

Radovanović F, Tomković T, Nastasović A, Veličković S, Nešić A, Onjia AE. Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts. 2013;:128-128.
https://hdl.handle.net/21.15107/rcub_dais_796 .

Radovanović, Filip, Tomković, Tanja, Nastasović, Aleksandra, Veličković, Sava, Nešić, Aleksandra, Onjia, Antonije E., "Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles" in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts (2013):128-128,
https://hdl.handle.net/21.15107/rcub_dais_796 .

TY  - CONF
AU  - Radovanović, Filip
AU  - Tomković, Tanja
AU  - Nastasović, Aleksandra
AU  - Veličković, Sava
AU  - Nešić, Aleksandra
AU  - Onjia, Antonije E.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/797
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2855
AB  - Ultrafiltration (UF) membranes are currently used in industry for the concentration of proteins and other macromolecules. Performance of UF membranes is generally limited by a trade-off between permeability and selectivity [1]. However, electrically-charged ultrafiltration membranes can provide a dramatic improvement in ultrafiltration performance [2]. Novel UF membranes were made by combining traditional immersion precipitation process for making membranes with photopolymerization of the casting solution comprising polyethersulfone, glycidyl methacrylate and other reactive monomers. Negative charges were introduced either by initially using 2-acrylamido-2-methylpropane sulfonic acid as a reactive monomer, or were later created by epoxide ring opening of crosslinked glycidyl methacrylate. As shown in Fig. 1, selectivity of these membranes significantly improved as the concentration of negatively-charged groups in the membrane increased. The effects of membrane composition on the properties and separation performance of these novel UF membranes will be presented.
PB  - Belgrade : Serbian Chemical Society
C3  - 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts
T1  - Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization
SP  - 131
EP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_dais_797
ER  - 

@conference{
author = "Radovanović, Filip and Tomković, Tanja and Nastasović, Aleksandra and Veličković, Sava and Nešić, Aleksandra and Onjia, Antonije E.",
year = "2013",
abstract = "Ultrafiltration (UF) membranes are currently used in industry for the concentration of proteins and other macromolecules. Performance of UF membranes is generally limited by a trade-off between permeability and selectivity [1]. However, electrically-charged ultrafiltration membranes can provide a dramatic improvement in ultrafiltration performance [2]. Novel UF membranes were made by combining traditional immersion precipitation process for making membranes with photopolymerization of the casting solution comprising polyethersulfone, glycidyl methacrylate and other reactive monomers. Negative charges were introduced either by initially using 2-acrylamido-2-methylpropane sulfonic acid as a reactive monomer, or were later created by epoxide ring opening of crosslinked glycidyl methacrylate. As shown in Fig. 1, selectivity of these membranes significantly improved as the concentration of negatively-charged groups in the membrane increased. The effects of membrane composition on the properties and separation performance of these novel UF membranes will be presented.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts",
title = "Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization",
pages = "131-131",
url = "https://hdl.handle.net/21.15107/rcub_dais_797"
}

Radovanović, F., Tomković, T., Nastasović, A., Veličković, S., Nešić, A.,& Onjia, A. E.. (2013). Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts
Belgrade : Serbian Chemical Society., 131-131.
https://hdl.handle.net/21.15107/rcub_dais_797

Radovanović F, Tomković T, Nastasović A, Veličković S, Nešić A, Onjia AE. Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts. 2013;:131-131.
https://hdl.handle.net/21.15107/rcub_dais_797 .

Radovanović, Filip, Tomković, Tanja, Nastasović, Aleksandra, Veličković, Sava, Nešić, Aleksandra, Onjia, Antonije E., "Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization" in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSECS 8, Belgrade, Serbia, June 27-29, 2013: Book of Abstracts (2013):131-131,
https://hdl.handle.net/21.15107/rcub_dais_797 .

TY  - CONF
AU  - Nešić, Aleksandra
AU  - Veličković, Sava
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/795
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2853
AB  - Ultrafiltration has recently become popular as a promising separation method in many industrial processes covering fractionation and concentration steps in the food, pharmaceutical and biotechnology industries as much as in water and wastewater treatments. This paper presents the synthesis of novel asymmetric polyethersulfone membranes containing an interpenetrating network of poly(glycidyl methacrylate) (PGMA). In order to improve the properties and application range of membranes, the epoxy groups from PGMA are converted to amine groups by ring opening under alkaline conditions. Membranes before and after functionalization are characterized by FTIR-ATR, elememtal analysis and water permeability.
PB  - Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
T1  - Novel asymmetric polyethersulfone membranes for ultrafiltration application
SP  - 82
EP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_dais_795
ER  - 

@conference{
author = "Nešić, Aleksandra and Veličković, Sava and Radovanović, Filip and Nastasović, Aleksandra",
year = "2012",
abstract = "Ultrafiltration has recently become popular as a promising separation method in many industrial processes covering fractionation and concentration steps in the food, pharmaceutical and biotechnology industries as much as in water and wastewater treatments. This paper presents the synthesis of novel asymmetric polyethersulfone membranes containing an interpenetrating network of poly(glycidyl methacrylate) (PGMA). In order to improve the properties and application range of membranes, the epoxy groups from PGMA are converted to amine groups by ring opening under alkaline conditions. Membranes before and after functionalization are characterized by FTIR-ATR, elememtal analysis and water permeability.",
publisher = "Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts",
title = "Novel asymmetric polyethersulfone membranes for ultrafiltration application",
pages = "82-82",
url = "https://hdl.handle.net/21.15107/rcub_dais_795"
}

Nešić, A., Veličković, S., Radovanović, F.,& Nastasović, A.. (2012). Novel asymmetric polyethersulfone membranes for ultrafiltration application. in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade., 82-82.
https://hdl.handle.net/21.15107/rcub_dais_795

Nešić A, Veličković S, Radovanović F, Nastasović A. Novel asymmetric polyethersulfone membranes for ultrafiltration application. in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts. 2012;:82-82.
https://hdl.handle.net/21.15107/rcub_dais_795 .

Nešić, Aleksandra, Veličković, Sava, Radovanović, Filip, Nastasović, Aleksandra, "Novel asymmetric polyethersulfone membranes for ultrafiltration application" in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts (2012):82-82,
https://hdl.handle.net/21.15107/rcub_dais_795 .

TY  - JOUR
AU  - Nešić, Aleksandra R.
AU  - Trifunović, Snežana
AU  - Grujić, Aleksandar
AU  - Veličković, Sava J.
AU  - Antonovic, Dusan G.
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/842
AB  - Complexes based on amidated pectin (AP) and poly(itaconic acid) (PIA) were prepared by casting films from solutions of AP and PIA in different ratios with the pectin amount ranging from 10% to 90% by mass. The complexes were investigated by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetry (TG). In all investigated ratios of AP/PIA glassy transparent films with a uniform structure were obtained. The results of elemental analysis confirmed the composition of the complexes, and FTIR spectroscopy has shown carboxylic and amide peak shifting, indicating complex formation between AP and PIA. Comparison of thermograms of AP/PIA films with different ratios of AP indicated that the increase of the amount of AP increases the thermal stability of the films by retarding the onset of the main degradation processes.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Research
T1  - Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound
VL  - 346
IS  - 15
SP  - 2463
EP  - 2468
DO  - 10.1016/j.carres.2011.08.021
ER  - 

@article{
author = "Nešić, Aleksandra R. and Trifunović, Snežana and Grujić, Aleksandar and Veličković, Sava J. and Antonovic, Dusan G.",
year = "2011",
abstract = "Complexes based on amidated pectin (AP) and poly(itaconic acid) (PIA) were prepared by casting films from solutions of AP and PIA in different ratios with the pectin amount ranging from 10% to 90% by mass. The complexes were investigated by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetry (TG). In all investigated ratios of AP/PIA glassy transparent films with a uniform structure were obtained. The results of elemental analysis confirmed the composition of the complexes, and FTIR spectroscopy has shown carboxylic and amide peak shifting, indicating complex formation between AP and PIA. Comparison of thermograms of AP/PIA films with different ratios of AP indicated that the increase of the amount of AP increases the thermal stability of the films by retarding the onset of the main degradation processes.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Research",
title = "Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound",
volume = "346",
number = "15",
pages = "2463-2468",
doi = "10.1016/j.carres.2011.08.021"
}

Nešić, A. R., Trifunović, S., Grujić, A., Veličković, S. J.,& Antonovic, D. G.. (2011). Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound. in Carbohydrate Research
Elsevier Sci Ltd, Oxford., 346(15), 2463-2468.
https://doi.org/10.1016/j.carres.2011.08.021

Nešić AR, Trifunović S, Grujić A, Veličković SJ, Antonovic DG. Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound. in Carbohydrate Research. 2011;346(15):2463-2468.
doi:10.1016/j.carres.2011.08.021 .

Nešić, Aleksandra R., Trifunović, Snežana, Grujić, Aleksandar, Veličković, Sava J., Antonovic, Dusan G., "Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound" in Carbohydrate Research, 346, no. 15 (2011):2463-2468,
https://doi.org/10.1016/j.carres.2011.08.021 . .

TY  - JOUR
AU  - Milutinović Nikolić, Aleksandra
AU  - Presburger Ulniković, Vladanka
AU  - Veličković, Sava
AU  - Aleksić, Radoslav
PY  - 2003
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3458
AB  - The aim of this investigation was to define the optimum conditions of obtaining glass fabric - epoxy resin laminar composites with mechanical and dielectric properties that satisfy the quality needed for production of printed circuit boards for microelectronics. 
Commercial materials: glass woven fabric, different types of silane finish and epoxy resin were starting materials in obtaining composites.  The conditions needed for the thermal removal of the original size from glass fabric were investigated. The optimal heat treatment should be performed at temperatures less than 550 оC, while cooling rates should be as slow as possible. In this manner the fabric has less than 0.1% of residual size, and the mechanical properties remain satisfactory.
Different types of adhesion promoters based on silanes were applied on heat-treated glass fabric as finishes. The quality of the composite material made of thermally and chemically treated glass fabric and epoxy resin was controlled by measuring the tensile and dielectric strength of composite. Depending on which properties of composite are of main concern, mechanical or dielectric, finish with amino functional group and lower heat treatment temperature or epoxy modified coatings and higher heat treatment temperature should be used for obtaining glass-fabric epoxy resin laminar composites.
PB  - Springer Netherlands
T2  - Journal of Materials Science: Materials in Electronics
T1  - The influence of heat treatment and finishing on the mechanical and dielectric properties of glass fabric-epoxy resin laminar composites
VL  - 14
IS  - 2
SP  - 75
EP  - 79
DO  - 10.1023/A:1021948502150
ER  - 

@article{
author = "Milutinović Nikolić, Aleksandra and Presburger Ulniković, Vladanka and Veličković, Sava and Aleksić, Radoslav",
year = "2003",
abstract = "The aim of this investigation was to define the optimum conditions of obtaining glass fabric - epoxy resin laminar composites with mechanical and dielectric properties that satisfy the quality needed for production of printed circuit boards for microelectronics. 
Commercial materials: glass woven fabric, different types of silane finish and epoxy resin were starting materials in obtaining composites.  The conditions needed for the thermal removal of the original size from glass fabric were investigated. The optimal heat treatment should be performed at temperatures less than 550 оC, while cooling rates should be as slow as possible. In this manner the fabric has less than 0.1% of residual size, and the mechanical properties remain satisfactory.
Different types of adhesion promoters based on silanes were applied on heat-treated glass fabric as finishes. The quality of the composite material made of thermally and chemically treated glass fabric and epoxy resin was controlled by measuring the tensile and dielectric strength of composite. Depending on which properties of composite are of main concern, mechanical or dielectric, finish with amino functional group and lower heat treatment temperature or epoxy modified coatings and higher heat treatment temperature should be used for obtaining glass-fabric epoxy resin laminar composites.",
publisher = "Springer Netherlands",
journal = "Journal of Materials Science: Materials in Electronics",
title = "The influence of heat treatment and finishing on the mechanical and dielectric properties of glass fabric-epoxy resin laminar composites",
volume = "14",
number = "2",
pages = "75-79",
doi = "10.1023/A:1021948502150"
}

Milutinović Nikolić, A., Presburger Ulniković, V., Veličković, S.,& Aleksić, R.. (2003). The influence of heat treatment and finishing on the mechanical and dielectric properties of glass fabric-epoxy resin laminar composites. in Journal of Materials Science: Materials in Electronics
Springer Netherlands., 14(2), 75-79.
https://doi.org/10.1023/A:1021948502150

Milutinović Nikolić A, Presburger Ulniković V, Veličković S, Aleksić R. The influence of heat treatment and finishing on the mechanical and dielectric properties of glass fabric-epoxy resin laminar composites. in Journal of Materials Science: Materials in Electronics. 2003;14(2):75-79.
doi:10.1023/A:1021948502150 .

Milutinović Nikolić, Aleksandra, Presburger Ulniković, Vladanka, Veličković, Sava, Aleksić, Radoslav, "The influence of heat treatment and finishing on the mechanical and dielectric properties of glass fabric-epoxy resin laminar composites" in Journal of Materials Science: Materials in Electronics, 14, no. 2 (2003):75-79,
https://doi.org/10.1023/A:1021948502150 . .