TY  - CONF
AU  - Lončarević, Branka
AU  - Gojgić-Cvijović, Gordana
AU  - Lješević, Marija
AU  - Joksimović, Kristina
AU  - Nikolić, Vladimir
AU  - Beškoski, Vladimir
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7144
AB  - In the present study graft copolymer with microbial levan and polystyren was synthesized and its biodegradable potential inliquid and soil medium was investigated.
PB  - Chemical Society of Montenegro
C3  - Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro
T1  - Investigation of biodegradability of levan-polystyrene graft copolymers in liquid and solid medium
SP  - 94
EP  - 94
UR  - https://hdl.handle.net/21.15107/rcub_cer_7144
ER  - 

@conference{
author = "Lončarević, Branka and Gojgić-Cvijović, Gordana and Lješević, Marija and Joksimović, Kristina and Nikolić, Vladimir and Beškoski, Vladimir",
year = "2023",
abstract = "In the present study graft copolymer with microbial levan and polystyren was synthesized and its biodegradable potential inliquid and soil medium was investigated.",
publisher = "Chemical Society of Montenegro",
journal = "Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro",
title = "Investigation of biodegradability of levan-polystyrene graft copolymers in liquid and solid medium",
pages = "94-94",
url = "https://hdl.handle.net/21.15107/rcub_cer_7144"
}

Lončarević, B., Gojgić-Cvijović, G., Lješević, M., Joksimović, K., Nikolić, V.,& Beškoski, V.. (2023). Investigation of biodegradability of levan-polystyrene graft copolymers in liquid and solid medium. in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro
Chemical Society of Montenegro., 94-94.
https://hdl.handle.net/21.15107/rcub_cer_7144

Lončarević B, Gojgić-Cvijović G, Lješević M, Joksimović K, Nikolić V, Beškoski V. Investigation of biodegradability of levan-polystyrene graft copolymers in liquid and solid medium. in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro. 2023;:94-94.
https://hdl.handle.net/21.15107/rcub_cer_7144 .

Lončarević, Branka, Gojgić-Cvijović, Gordana, Lješević, Marija, Joksimović, Kristina, Nikolić, Vladimir, Beškoski, Vladimir, "Investigation of biodegradability of levan-polystyrene graft copolymers in liquid and solid medium" in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro (2023):94-94,
https://hdl.handle.net/21.15107/rcub_cer_7144 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Gojgić-Cvijović, Gordana
AU  - Lješević, Marija
AU  - Joksimović, Kristina
AU  - Nikolić, Vladimir
AU  - Beškoski, Vladimir
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7145
AB  - In the present study graft copolymers combining starch with polystyrene (S-PS) or methacrylic acid 
were (S-MA) were synthesized and its biodegradable potential was investigated.
PB  - Chemical Society of Montenegro
C3  - Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro
T1  - Starch Copolymers with Enhanced Biodegradability
SP  - 95
EP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_cer_7145
ER  - 

@conference{
author = "Lončarević, Branka and Gojgić-Cvijović, Gordana and Lješević, Marija and Joksimović, Kristina and Nikolić, Vladimir and Beškoski, Vladimir",
year = "2023",
abstract = "In the present study graft copolymers combining starch with polystyrene (S-PS) or methacrylic acid 
were (S-MA) were synthesized and its biodegradable potential was investigated.",
publisher = "Chemical Society of Montenegro",
journal = "Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro",
title = "Starch Copolymers with Enhanced Biodegradability",
pages = "95-95",
url = "https://hdl.handle.net/21.15107/rcub_cer_7145"
}

Lončarević, B., Gojgić-Cvijović, G., Lješević, M., Joksimović, K., Nikolić, V.,& Beškoski, V.. (2023). Starch Copolymers with Enhanced Biodegradability. in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro
Chemical Society of Montenegro., 95-95.
https://hdl.handle.net/21.15107/rcub_cer_7145

Lončarević B, Gojgić-Cvijović G, Lješević M, Joksimović K, Nikolić V, Beškoski V. Starch Copolymers with Enhanced Biodegradability. in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro. 2023;:95-95.
https://hdl.handle.net/21.15107/rcub_cer_7145 .

Lončarević, Branka, Gojgić-Cvijović, Gordana, Lješević, Marija, Joksimović, Kristina, Nikolić, Vladimir, Beškoski, Vladimir, "Starch Copolymers with Enhanced Biodegradability" in Book of Abstracts - 23rd European Meeting on Environmental Chemistry (EMEC 23), 3-6 December, 2023, Budva, Montenegro (2023):95-95,
https://hdl.handle.net/21.15107/rcub_cer_7145 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Randjelović, Danijela
AU  - Poljak, Predrag
AU  - Gojgić-Cvijović, Gordana
AU  - Beškoski, Vladimir
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5720
AB  - Food packaging ensures safety and hygiene, while reducing food waste, therefore it is and ssential component of the food supply chain. A sustainable and biodegradable alternative to conventional food packaging is edible packaging which contributes to the reducing waste and the economic efficiency of packaging materials. The numerous biopolymeric materials could be used as source such as polysaccharides (starch, cellulose, chitosan) and proteins (gelatin, soy protein, whey). Exopolysaccharides (EPS) are fermentation-based biopolyrners, secreted outside the cell wall and synthesized by various microbial species including bacteria, fungi and blue-green algae. Microbial levan is fructose-based EPS and convenient due to its biocornpatibility, renewability, high molecular weight, low viscous nature, antioxidant and prebiotic effects. Levan used in this work was produced by the B. licheniformis NS032 strain and its hydrophobic derivatives were obtained using octenyl succinic anhydride (OSA). Degree of substitution (DS) for modified levans were 0.025 and 0.032 for LH22 and LH25 respectively. Three different film compositions were prepared: 
levan/LH22/LH26 with gelatin in proportions 1:1. Films were prepared by casting technique and evaporated at room temperature. Morphology of the obtained films were studied by ARV (Atomic force microscopy), AutoProbe CP-Research SPM (TM Microscopes-Broker) and mechanical properties were examined by Shimodzu E2-LX tensile tester. The samples had thickness of 150 trrrl. Based on morphological measurements, it can be concluded that use of levan derivatives change roughness of the levan/gelatin blend film. The best mechanical properties (tensile strength and elongation at break) were obtained with pure levan. Obtained films are composed from edible and biodegradable components and therefore are potentially applicable in food industry. Future investigation will be focused on optimization of levan/gelatin proportion and more extensive 
structural and mechanical properties of obtained films.
PB  - COST Action 19124
PB  - Ljubljana, Slovenia : Pulp and Paper Institute
C3  - Book of Abstracts - 2nd CIRCUL-A-BILITY Conference, September 12-14, 2022, Ljubljana
T1  - Characterisation of Blend Film Based on Microbial Polysaccharide Levan and Gelatin
SP  - 109
EP  - 110
UR  - https://hdl.handle.net/21.15107/rcub_cer_5720
ER  - 

@conference{
author = "Lončarević, Branka and Nikolić, Vladimir and Randjelović, Danijela and Poljak, Predrag and Gojgić-Cvijović, Gordana and Beškoski, Vladimir",
year = "2022",
abstract = "Food packaging ensures safety and hygiene, while reducing food waste, therefore it is and ssential component of the food supply chain. A sustainable and biodegradable alternative to conventional food packaging is edible packaging which contributes to the reducing waste and the economic efficiency of packaging materials. The numerous biopolymeric materials could be used as source such as polysaccharides (starch, cellulose, chitosan) and proteins (gelatin, soy protein, whey). Exopolysaccharides (EPS) are fermentation-based biopolyrners, secreted outside the cell wall and synthesized by various microbial species including bacteria, fungi and blue-green algae. Microbial levan is fructose-based EPS and convenient due to its biocornpatibility, renewability, high molecular weight, low viscous nature, antioxidant and prebiotic effects. Levan used in this work was produced by the B. licheniformis NS032 strain and its hydrophobic derivatives were obtained using octenyl succinic anhydride (OSA). Degree of substitution (DS) for modified levans were 0.025 and 0.032 for LH22 and LH25 respectively. Three different film compositions were prepared: 
levan/LH22/LH26 with gelatin in proportions 1:1. Films were prepared by casting technique and evaporated at room temperature. Morphology of the obtained films were studied by ARV (Atomic force microscopy), AutoProbe CP-Research SPM (TM Microscopes-Broker) and mechanical properties were examined by Shimodzu E2-LX tensile tester. The samples had thickness of 150 trrrl. Based on morphological measurements, it can be concluded that use of levan derivatives change roughness of the levan/gelatin blend film. The best mechanical properties (tensile strength and elongation at break) were obtained with pure levan. Obtained films are composed from edible and biodegradable components and therefore are potentially applicable in food industry. Future investigation will be focused on optimization of levan/gelatin proportion and more extensive 
structural and mechanical properties of obtained films.",
publisher = "COST Action 19124, Ljubljana, Slovenia : Pulp and Paper Institute",
journal = "Book of Abstracts - 2nd CIRCUL-A-BILITY Conference, September 12-14, 2022, Ljubljana",
title = "Characterisation of Blend Film Based on Microbial Polysaccharide Levan and Gelatin",
pages = "109-110",
url = "https://hdl.handle.net/21.15107/rcub_cer_5720"
}

Lončarević, B., Nikolić, V., Randjelović, D., Poljak, P., Gojgić-Cvijović, G.,& Beškoski, V.. (2022). Characterisation of Blend Film Based on Microbial Polysaccharide Levan and Gelatin. in Book of Abstracts - 2nd CIRCUL-A-BILITY Conference, September 12-14, 2022, Ljubljana
COST Action 19124., 109-110.
https://hdl.handle.net/21.15107/rcub_cer_5720

Lončarević B, Nikolić V, Randjelović D, Poljak P, Gojgić-Cvijović G, Beškoski V. Characterisation of Blend Film Based on Microbial Polysaccharide Levan and Gelatin. in Book of Abstracts - 2nd CIRCUL-A-BILITY Conference, September 12-14, 2022, Ljubljana. 2022;:109-110.
https://hdl.handle.net/21.15107/rcub_cer_5720 .

Lončarević, Branka, Nikolić, Vladimir, Randjelović, Danijela, Poljak, Predrag, Gojgić-Cvijović, Gordana, Beškoski, Vladimir, "Characterisation of Blend Film Based on Microbial Polysaccharide Levan and Gelatin" in Book of Abstracts - 2nd CIRCUL-A-BILITY Conference, September 12-14, 2022, Ljubljana (2022):109-110,
https://hdl.handle.net/21.15107/rcub_cer_5720 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Lješević, Marija
AU  - Randjelović, Danijela
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5100
AB  - Essential oils extracted from plants are attractive additives in the food industry due to their antimicrobial and antioxidant properties. Therefore, in recent years, essential oils have been extensively investigated as additives for syntheses of edible and biodegradable emulsified films and coatings. Edible films and coatings are used in food preservation in order to improve the gas and moisture barriers, mechanical properties, sensory perceptions, microbial protection and to 
prolong the shelf life of various food products. Finally, edible films should replace conventional materials originating from petrochemical industry. The materials for the production of edible films include mainly proteins such as gelatin, lipids, and polysaccharides individually or in combination. Sometimes additives are incorporated to improve the properties of films. Microbial levan is a biocompatible, biodegradable and a renewable exopolysaccharide with antioxidant and prebiotic activities.
C3  - Book of abstracts of 5th Green and Sustainable Chemistry Conference, 10-11 November 2020, Online
T1  - Application of essential oil from Achillea millefolium for levan/gelatin blend films
SP  - P2.12.
UR  - https://hdl.handle.net/21.15107/rcub_cer_5100
ER  - 

@conference{
author = "Lončarević, Branka and Nikolić, Vladimir and Lješević, Marija and Randjelović, Danijela and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir",
year = "2020",
abstract = "Essential oils extracted from plants are attractive additives in the food industry due to their antimicrobial and antioxidant properties. Therefore, in recent years, essential oils have been extensively investigated as additives for syntheses of edible and biodegradable emulsified films and coatings. Edible films and coatings are used in food preservation in order to improve the gas and moisture barriers, mechanical properties, sensory perceptions, microbial protection and to 
prolong the shelf life of various food products. Finally, edible films should replace conventional materials originating from petrochemical industry. The materials for the production of edible films include mainly proteins such as gelatin, lipids, and polysaccharides individually or in combination. Sometimes additives are incorporated to improve the properties of films. Microbial levan is a biocompatible, biodegradable and a renewable exopolysaccharide with antioxidant and prebiotic activities.",
journal = "Book of abstracts of 5th Green and Sustainable Chemistry Conference, 10-11 November 2020, Online",
title = "Application of essential oil from Achillea millefolium for levan/gelatin blend films",
pages = "P2.12.",
url = "https://hdl.handle.net/21.15107/rcub_cer_5100"
}

Lončarević, B., Nikolić, V., Lješević, M., Randjelović, D., Gojgić-Cvijović, G., Jakovljević, D.,& Beškoski, V.. (2020). Application of essential oil from Achillea millefolium for levan/gelatin blend films. in Book of abstracts of 5th Green and Sustainable Chemistry Conference, 10-11 November 2020, Online, P2.12..
https://hdl.handle.net/21.15107/rcub_cer_5100

Lončarević B, Nikolić V, Lješević M, Randjelović D, Gojgić-Cvijović G, Jakovljević D, Beškoski V. Application of essential oil from Achillea millefolium for levan/gelatin blend films. in Book of abstracts of 5th Green and Sustainable Chemistry Conference, 10-11 November 2020, Online. 2020;:P2.12..
https://hdl.handle.net/21.15107/rcub_cer_5100 .

Lončarević, Branka, Nikolić, Vladimir, Lješević, Marija, Randjelović, Danijela, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, "Application of essential oil from Achillea millefolium for levan/gelatin blend films" in Book of abstracts of 5th Green and Sustainable Chemistry Conference, 10-11 November 2020, Online (2020):P2.12.,
https://hdl.handle.net/21.15107/rcub_cer_5100 .

TY  - CONF
AU  - Đukanović, S.
AU  - Cvetković, Stefana
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Knezević-Vukčević, J.
AU  - Kekić, D.
AU  - Mitić-Ćulafić, D.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5150
AB  - Poster presented at: FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020
T1  - Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates
UR  - https://hdl.handle.net/21.15107/rcub_cer_5150
ER  - 

@conference{
author = "Đukanović, S. and Cvetković, Stefana and Lončarević, Branka and Nikolić, Vladimir and Knezević-Vukčević, J. and Kekić, D. and Mitić-Ćulafić, D.",
year = "2020",
abstract = "Poster presented at: FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020",
title = "Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates",
url = "https://hdl.handle.net/21.15107/rcub_cer_5150"
}

Đukanović, S., Cvetković, S., Lončarević, B., Nikolić, V., Knezević-Vukčević, J., Kekić, D.,& Mitić-Ćulafić, D.. (2020). Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates. .
https://hdl.handle.net/21.15107/rcub_cer_5150

Đukanović S, Cvetković S, Lončarević B, Nikolić V, Knezević-Vukčević J, Kekić D, Mitić-Ćulafić D. Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates. 2020;.
https://hdl.handle.net/21.15107/rcub_cer_5150 .

Đukanović, S., Cvetković, Stefana, Lončarević, Branka, Nikolić, Vladimir, Knezević-Vukčević, J., Kekić, D., Mitić-Ćulafić, D., "Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates" (2020),
https://hdl.handle.net/21.15107/rcub_cer_5150 .

TY  - CONF
AU  - Đukanović, S.
AU  - Cvetković, Stefana
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Knezević-Vukčević, J.
AU  - Kekić, D.
AU  - Mitić-Ćulafić, D.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5149
AB  - The aim of the study is to investigate the effect of vancomycin and emodin in combination on biofilm formation of two Staphylococcus aureus clinical isolates derived from wound and blood culture. Furthermore, the effect on bacterial respiration was monitored.
PB  - Federation of European Microbiological Societies (FEMS)
C3  - FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020
T1  - Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates
SP  - 347
UR  - https://hdl.handle.net/21.15107/rcub_cer_5149
ER  - 

@conference{
author = "Đukanović, S. and Cvetković, Stefana and Lončarević, Branka and Nikolić, Vladimir and Knezević-Vukčević, J. and Kekić, D. and Mitić-Ćulafić, D.",
year = "2020",
abstract = "The aim of the study is to investigate the effect of vancomycin and emodin in combination on biofilm formation of two Staphylococcus aureus clinical isolates derived from wound and blood culture. Furthermore, the effect on bacterial respiration was monitored.",
publisher = "Federation of European Microbiological Societies (FEMS)",
journal = "FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020",
title = "Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates",
pages = "347",
url = "https://hdl.handle.net/21.15107/rcub_cer_5149"
}

Đukanović, S., Cvetković, S., Lončarević, B., Nikolić, V., Knezević-Vukčević, J., Kekić, D.,& Mitić-Ćulafić, D.. (2020). Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates. in FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020
Federation of European Microbiological Societies (FEMS)., 347.
https://hdl.handle.net/21.15107/rcub_cer_5149

Đukanović S, Cvetković S, Lončarević B, Nikolić V, Knezević-Vukčević J, Kekić D, Mitić-Ćulafić D. Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates. in FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020. 2020;:347.
https://hdl.handle.net/21.15107/rcub_cer_5149 .

Đukanović, S., Cvetković, Stefana, Lončarević, Branka, Nikolić, Vladimir, Knezević-Vukčević, J., Kekić, D., Mitić-Ćulafić, D., "Combined effect of vankomycin and emodin on Staphylococcus aureus MSSA and MRSA isolates" in FEMS Online Conference on Microbiology 2020, Belgrade, 28-31 October 2020 (2020):347,
https://hdl.handle.net/21.15107/rcub_cer_5149 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Randjelović, Danijela
AU  - Gojgić-Cvijović, Gordana
AU  - Šinik, Jovana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7550
AB  - Food packaging concerns a preservation and protection of all types of food and therefore is important part of food technology. Today, synthetic packaging films are predominantly used, however they are very slow or only partially degradable. Due to incomplete degradation of synthetic polymers, micro and nanoplastic could be produced, which is in last year’s considered as a new threat to human health. Microbial polysaccharide levan is natural biopolymer produced by broad range of microorganisms and has promising properties such as biocompatibility, renewability, high molecular height, low viscous nature, antioxidant and prebiotic activities. Gelatine, due to its affordability, biodegradability, low cost and excellent functional and film properties is currently the most preferred protein derivative.
PB  - Elsevier
C3  - 4th Green & Sustainable Chemistry Conference, Book of abstracts, 5-8 May 2019, Dresden, Genmany
T1  - Characterisation of levan and levan/gelatin blend films using AFM and FTIR spectroscopy
SP  - O6.4
UR  - https://hdl.handle.net/21.15107/rcub_cer_7550
ER  - 

@conference{
author = "Lončarević, Branka and Nikolić, Vladimir and Randjelović, Danijela and Gojgić-Cvijović, Gordana and Šinik, Jovana and Jakovljević, Dragica and Beškoski, Vladimir",
year = "2019",
abstract = "Food packaging concerns a preservation and protection of all types of food and therefore is important part of food technology. Today, synthetic packaging films are predominantly used, however they are very slow or only partially degradable. Due to incomplete degradation of synthetic polymers, micro and nanoplastic could be produced, which is in last year’s considered as a new threat to human health. Microbial polysaccharide levan is natural biopolymer produced by broad range of microorganisms and has promising properties such as biocompatibility, renewability, high molecular height, low viscous nature, antioxidant and prebiotic activities. Gelatine, due to its affordability, biodegradability, low cost and excellent functional and film properties is currently the most preferred protein derivative.",
publisher = "Elsevier",
journal = "4th Green & Sustainable Chemistry Conference, Book of abstracts, 5-8 May 2019, Dresden, Genmany",
title = "Characterisation of levan and levan/gelatin blend films using AFM and FTIR spectroscopy",
pages = "O6.4",
url = "https://hdl.handle.net/21.15107/rcub_cer_7550"
}

Lončarević, B., Nikolić, V., Randjelović, D., Gojgić-Cvijović, G., Šinik, J., Jakovljević, D.,& Beškoski, V.. (2019). Characterisation of levan and levan/gelatin blend films using AFM and FTIR spectroscopy. in 4th Green & Sustainable Chemistry Conference, Book of abstracts, 5-8 May 2019, Dresden, Genmany
Elsevier., O6.4.
https://hdl.handle.net/21.15107/rcub_cer_7550

Lončarević B, Nikolić V, Randjelović D, Gojgić-Cvijović G, Šinik J, Jakovljević D, Beškoski V. Characterisation of levan and levan/gelatin blend films using AFM and FTIR spectroscopy. in 4th Green & Sustainable Chemistry Conference, Book of abstracts, 5-8 May 2019, Dresden, Genmany. 2019;:O6.4.
https://hdl.handle.net/21.15107/rcub_cer_7550 .

Lončarević, Branka, Nikolić, Vladimir, Randjelović, Danijela, Gojgić-Cvijović, Gordana, Šinik, Jovana, Jakovljević, Dragica, Beškoski, Vladimir, "Characterisation of levan and levan/gelatin blend films using AFM and FTIR spectroscopy" in 4th Green & Sustainable Chemistry Conference, Book of abstracts, 5-8 May 2019, Dresden, Genmany (2019):O6.4,
https://hdl.handle.net/21.15107/rcub_cer_7550 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Lugonja, Nikoleta
AU  - Randjelović, Danijela
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3984
AB  - Poster presented at 6th Workshop Specific Methods for Food Safety and Quality, 2018
T1  - Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization
UR  - https://hdl.handle.net/21.15107/rcub_cer_3984
ER  - 

@conference{
author = "Lončarević, Branka and Nikolić, Vladimir and Lugonja, Nikoleta and Randjelović, Danijela and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir",
year = "2018",
abstract = "Poster presented at 6th Workshop Specific Methods for Food Safety and Quality, 2018",
title = "Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization",
url = "https://hdl.handle.net/21.15107/rcub_cer_3984"
}

Lončarević, B., Nikolić, V., Lugonja, N., Randjelović, D., Gojgić-Cvijović, G., Jakovljević, D.,& Beškoski, V.. (2018). Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization. .
https://hdl.handle.net/21.15107/rcub_cer_3984

Lončarević B, Nikolić V, Lugonja N, Randjelović D, Gojgić-Cvijović G, Jakovljević D, Beškoski V. Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_3984 .

Lončarević, Branka, Nikolić, Vladimir, Lugonja, Nikoleta, Randjelović, Danijela, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, "Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization" (2018),
https://hdl.handle.net/21.15107/rcub_cer_3984 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Lješević, Marija
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Nikolić, Vladimir
AU  - Vrvić, Miroslav
AU  - Beškoski, Vladimir
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5193
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5194
AB  - Poster presented at SETAC Europe 28th Annual Meeting, May 13-17, 2018, Rome, Italy
T1  - Biodegradability of novel graft copolymer with levan and polystyrene
UR  - https://hdl.handle.net/21.15107/rcub_cer_5194
ER  - 

@conference{
author = "Lončarević, Branka and Lješević, Marija and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Nikolić, Vladimir and Vrvić, Miroslav and Beškoski, Vladimir",
year = "2018",
abstract = "Poster presented at SETAC Europe 28th Annual Meeting, May 13-17, 2018, Rome, Italy",
title = "Biodegradability of novel graft copolymer with levan and polystyrene",
url = "https://hdl.handle.net/21.15107/rcub_cer_5194"
}

Lončarević, B., Lješević, M., Gojgić-Cvijović, G., Jakovljević, D., Nikolić, V., Vrvić, M.,& Beškoski, V.. (2018). Biodegradability of novel graft copolymer with levan and polystyrene. .
https://hdl.handle.net/21.15107/rcub_cer_5194

Lončarević B, Lješević M, Gojgić-Cvijović G, Jakovljević D, Nikolić V, Vrvić M, Beškoski V. Biodegradability of novel graft copolymer with levan and polystyrene. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_5194 .

Lončarević, Branka, Lješević, Marija, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Nikolić, Vladimir, Vrvić, Miroslav, Beškoski, Vladimir, "Biodegradability of novel graft copolymer with levan and polystyrene" (2018),
https://hdl.handle.net/21.15107/rcub_cer_5194 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Nikolić, Vladimir
AU  - Lugonja, Nikoleta
AU  - Randjelović, Danijela
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3983
AB  - The numerous naturally occurring biopolymeric materials are used as edible films and coatings (lipids, proteins, and polysaccharides). Microbial levan and pullulan have been already considered as biopolymers in food industry. The aim of this work was to obtain the levan and levan/pullulan blend films and compare them using the Atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). Two different films compositions were prepared by casting method: levan and levan/pullulan in the proportions 1:1. AFM measurements showed that levan film had a smoother surface and, consequently, a lower degree of roughness comparing to the levan/pullulan blend films. FTIR spectra showed peaks, which corresponded to all components of the obtained films.
PB  - Belgrade :  Society of Physical Chemists of Serbia
C3  - Proceedings - 6th Workshop Specific Methods for Food Safety and Quality
T1  - Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization
SP  - 33
EP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_cer_3983
ER  - 

@conference{
author = "Lončarević, Branka and Nikolić, Vladimir and Lugonja, Nikoleta and Randjelović, Danijela and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir",
year = "2018",
abstract = "The numerous naturally occurring biopolymeric materials are used as edible films and coatings (lipids, proteins, and polysaccharides). Microbial levan and pullulan have been already considered as biopolymers in food industry. The aim of this work was to obtain the levan and levan/pullulan blend films and compare them using the Atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). Two different films compositions were prepared by casting method: levan and levan/pullulan in the proportions 1:1. AFM measurements showed that levan film had a smoother surface and, consequently, a lower degree of roughness comparing to the levan/pullulan blend films. FTIR spectra showed peaks, which corresponded to all components of the obtained films.",
publisher = "Belgrade :  Society of Physical Chemists of Serbia",
journal = "Proceedings - 6th Workshop Specific Methods for Food Safety and Quality",
title = "Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization",
pages = "33-36",
url = "https://hdl.handle.net/21.15107/rcub_cer_3983"
}

Lončarević, B., Nikolić, V., Lugonja, N., Randjelović, D., Gojgić-Cvijović, G., Jakovljević, D.,& Beškoski, V.. (2018). Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization. in Proceedings - 6th Workshop Specific Methods for Food Safety and Quality
Belgrade :  Society of Physical Chemists of Serbia., 33-36.
https://hdl.handle.net/21.15107/rcub_cer_3983

Lončarević B, Nikolić V, Lugonja N, Randjelović D, Gojgić-Cvijović G, Jakovljević D, Beškoski V. Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization. in Proceedings - 6th Workshop Specific Methods for Food Safety and Quality. 2018;:33-36.
https://hdl.handle.net/21.15107/rcub_cer_3983 .

Lončarević, Branka, Nikolić, Vladimir, Lugonja, Nikoleta, Randjelović, Danijela, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, "Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization" in Proceedings - 6th Workshop Specific Methods for Food Safety and Quality (2018):33-36,
https://hdl.handle.net/21.15107/rcub_cer_3983 .

TY  - CONF
AU  - Lončarević, Branka
AU  - Lješević, Marija
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Nikolić, Vladimir
AU  - Vrvić, Miroslav
AU  - Beškoski, Vladimir
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5193
AB  - In the present study, graft copolymer with microbial levan and styrene was synthetized, characterized and its biodegradable potential was investigated.
PB  - Society of Environmental Toxicology and Chemistry Europe
C3  - SETAC Europe 28th Annual Meeting, Rome, Italy, May 13-17, 2018
T1  - Biodegradability of novel graft copolymer with levan and polystyrene
SP  - 297
EP  - 298
UR  - https://hdl.handle.net/21.15107/rcub_cer_5193
ER  - 

@conference{
author = "Lončarević, Branka and Lješević, Marija and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Nikolić, Vladimir and Vrvić, Miroslav and Beškoski, Vladimir",
year = "2018",
abstract = "In the present study, graft copolymer with microbial levan and styrene was synthetized, characterized and its biodegradable potential was investigated.",
publisher = "Society of Environmental Toxicology and Chemistry Europe",
journal = "SETAC Europe 28th Annual Meeting, Rome, Italy, May 13-17, 2018",
title = "Biodegradability of novel graft copolymer with levan and polystyrene",
pages = "297-298",
url = "https://hdl.handle.net/21.15107/rcub_cer_5193"
}

Lončarević, B., Lješević, M., Gojgić-Cvijović, G., Jakovljević, D., Nikolić, V., Vrvić, M.,& Beškoski, V.. (2018). Biodegradability of novel graft copolymer with levan and polystyrene. in SETAC Europe 28th Annual Meeting, Rome, Italy, May 13-17, 2018
Society of Environmental Toxicology and Chemistry Europe., 297-298.
https://hdl.handle.net/21.15107/rcub_cer_5193

Lončarević B, Lješević M, Gojgić-Cvijović G, Jakovljević D, Nikolić V, Vrvić M, Beškoski V. Biodegradability of novel graft copolymer with levan and polystyrene. in SETAC Europe 28th Annual Meeting, Rome, Italy, May 13-17, 2018. 2018;:297-298.
https://hdl.handle.net/21.15107/rcub_cer_5193 .

Lončarević, Branka, Lješević, Marija, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Nikolić, Vladimir, Vrvić, Miroslav, Beškoski, Vladimir, "Biodegradability of novel graft copolymer with levan and polystyrene" in SETAC Europe 28th Annual Meeting, Rome, Italy, May 13-17, 2018 (2018):297-298,
https://hdl.handle.net/21.15107/rcub_cer_5193 .

TY  - JOUR
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Spasojevic, Vuk D.
AU  - Popović, Aleksandar R.
AU  - Nikolić, Vladimir B.
AU  - Spasojević, Pavle
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2126
AB  - For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.
PB  - American Chemical Society (ACS)
T2  - Biomacromolecules
T1  - Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid
VL  - 18
IS  - 12
SP  - 3881
EP  - 3891
DO  - 10.1021/acs.biomac.7b00840
ER  - 

@article{
author = "Panić, Vesna and Šešlija, Sanja and Popović, Ivanka G. and Spasojevic, Vuk D. and Popović, Aleksandar R. and Nikolić, Vladimir B. and Spasojević, Pavle",
year = "2017",
abstract = "For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.",
publisher = "American Chemical Society (ACS)",
journal = "Biomacromolecules",
title = "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid",
volume = "18",
number = "12",
pages = "3881-3891",
doi = "10.1021/acs.biomac.7b00840"
}

Panić, V., Šešlija, S., Popović, I. G., Spasojevic, V. D., Popović, A. R., Nikolić, V. B.,& Spasojević, P.. (2017). Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules
American Chemical Society (ACS)., 18(12), 3881-3891.
https://doi.org/10.1021/acs.biomac.7b00840

Panić V, Šešlija S, Popović IG, Spasojevic VD, Popović AR, Nikolić VB, Spasojević P. Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules. 2017;18(12):3881-3891.
doi:10.1021/acs.biomac.7b00840 .

Panić, Vesna, Šešlija, Sanja, Popović, Ivanka G., Spasojevic, Vuk D., Popović, Aleksandar R., Nikolić, Vladimir B., Spasojević, Pavle, "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid" in Biomacromolecules, 18, no. 12 (2017):3881-3891,
https://doi.org/10.1021/acs.biomac.7b00840 . .

TY  - JOUR
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Spasojević, Vuk D.
AU  - Popović, Aleksandar R.
AU  - Nikolić, Vladimir
AU  - Spasojević, Pavle
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2922
AB  - For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.
PB  - American Chemical Society (ACS)
T2  - Biomacromolecules
T1  - Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid
VL  - 18
IS  - 12
SP  - 3881
EP  - 3891
DO  - 10.1021/acs.biomac.7b00840
ER  - 

@article{
author = "Panić, Vesna and Šešlija, Sanja and Popović, Ivanka G. and Spasojević, Vuk D. and Popović, Aleksandar R. and Nikolić, Vladimir and Spasojević, Pavle",
year = "2017",
abstract = "For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.",
publisher = "American Chemical Society (ACS)",
journal = "Biomacromolecules",
title = "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid",
volume = "18",
number = "12",
pages = "3881-3891",
doi = "10.1021/acs.biomac.7b00840"
}

Panić, V., Šešlija, S., Popović, I. G., Spasojević, V. D., Popović, A. R., Nikolić, V.,& Spasojević, P.. (2017). Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules
American Chemical Society (ACS)., 18(12), 3881-3891.
https://doi.org/10.1021/acs.biomac.7b00840

Panić V, Šešlija S, Popović IG, Spasojević VD, Popović AR, Nikolić V, Spasojević P. Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules. 2017;18(12):3881-3891.
doi:10.1021/acs.biomac.7b00840 .

Panić, Vesna, Šešlija, Sanja, Popović, Ivanka G., Spasojević, Vuk D., Popović, Aleksandar R., Nikolić, Vladimir, Spasojević, Pavle, "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid" in Biomacromolecules, 18, no. 12 (2017):3881-3891,
https://doi.org/10.1021/acs.biomac.7b00840 . .

TY  - CONF
AU  - Kekez, Branka
AU  - Nikolić, Vladimir
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
AU  - Vrvić, Miroslav
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5042
AB  - Poster presented at: Kongres mikrobiologa Srbije, Mikromed 2017, Beograd, 11-13 maj 2017.
T1  - Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju
UR  - https://hdl.handle.net/21.15107/rcub_cer_5042
ER  - 

@conference{
author = "Kekez, Branka and Nikolić, Vladimir and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir and Vrvić, Miroslav",
year = "2017",
abstract = "Poster presented at: Kongres mikrobiologa Srbije, Mikromed 2017, Beograd, 11-13 maj 2017.",
title = "Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju",
url = "https://hdl.handle.net/21.15107/rcub_cer_5042"
}

Kekez, B., Nikolić, V., Gojgić-Cvijović, G., Jakovljević, D., Beškoski, V.,& Vrvić, M.. (2017). Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju. .
https://hdl.handle.net/21.15107/rcub_cer_5042

Kekez B, Nikolić V, Gojgić-Cvijović G, Jakovljević D, Beškoski V, Vrvić M. Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju. 2017;.
https://hdl.handle.net/21.15107/rcub_cer_5042 .

Kekez, Branka, Nikolić, Vladimir, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, Vrvić, Miroslav, "Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju" (2017),
https://hdl.handle.net/21.15107/rcub_cer_5042 .

TY  - CONF
AU  - Kekez, Branka
AU  - Nikolić, Vladimir
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
AU  - Vrvić, Miroslav
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5041
AB  - Cilj ovog rada je bio izolovati i upotrebiti mikrobni levan za sintezu novog tipa kalemljenog kopolimera sa stirenom i ispitati uticaj aminoaktivatora na reakciju kalemljenja.
AB  - The aim of this study was to isolate and use microbial levan for the synthesis of a new type of grafted copolymer with styrene and to investigate the influence of amino activators on the grafting reaction.
PB  - Beograd: Udruženje mikrobioologa Srbije
C3  - Kongres mikrobiologa Srbije, Mikromed 2017, Knjiga apstrakata,  Beograd, 11-13 maj 2017.
T1  - Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju
T1  - Microbial polysaccharide levan and polystyren in grafting reaction including amine activators
SP  - 154
EP  - 155
UR  - https://hdl.handle.net/21.15107/rcub_cer_5041
ER  - 

@conference{
author = "Kekez, Branka and Nikolić, Vladimir and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir and Vrvić, Miroslav",
year = "2017",
abstract = "Cilj ovog rada je bio izolovati i upotrebiti mikrobni levan za sintezu novog tipa kalemljenog kopolimera sa stirenom i ispitati uticaj aminoaktivatora na reakciju kalemljenja., The aim of this study was to isolate and use microbial levan for the synthesis of a new type of grafted copolymer with styrene and to investigate the influence of amino activators on the grafting reaction.",
publisher = "Beograd: Udruženje mikrobioologa Srbije",
journal = "Kongres mikrobiologa Srbije, Mikromed 2017, Knjiga apstrakata,  Beograd, 11-13 maj 2017.",
title = "Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju, Microbial polysaccharide levan and polystyren in grafting reaction including amine activators",
pages = "154-155",
url = "https://hdl.handle.net/21.15107/rcub_cer_5041"
}

Kekez, B., Nikolić, V., Gojgić-Cvijović, G., Jakovljević, D., Beškoski, V.,& Vrvić, M.. (2017). Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju. in Kongres mikrobiologa Srbije, Mikromed 2017, Knjiga apstrakata,  Beograd, 11-13 maj 2017.
Beograd: Udruženje mikrobioologa Srbije., 154-155.
https://hdl.handle.net/21.15107/rcub_cer_5041

Kekez B, Nikolić V, Gojgić-Cvijović G, Jakovljević D, Beškoski V, Vrvić M. Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju. in Kongres mikrobiologa Srbije, Mikromed 2017, Knjiga apstrakata,  Beograd, 11-13 maj 2017.. 2017;:154-155.
https://hdl.handle.net/21.15107/rcub_cer_5041 .

Kekez, Branka, Nikolić, Vladimir, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, Vrvić, Miroslav, "Mikrobni polisaharid levan u reakciji kalemljenja stirena uz aminoaktivaciju" in Kongres mikrobiologa Srbije, Mikromed 2017, Knjiga apstrakata,  Beograd, 11-13 maj 2017. (2017):154-155,
https://hdl.handle.net/21.15107/rcub_cer_5041 .

TY  - JOUR
AU  - Kekez, Branka
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Pavlović, Vladimir B.
AU  - Beškoski, Vladimir
AU  - Popović, Aleksandar R.
AU  - Vrvić, Miroslav
AU  - Nikolić, Vladimir
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1930
AB  - Novel macromolecular graft copolymers were synthesized by reaction of the hydroxyl groups of the microbial polysaccharide levan, produced using Bacillus licheniformis, with polystyrene (Lev-g-PS). Synthesis was performed by the free radical reaction using potassium persulfate (PPS) as initiator. The prepared copolymer was characterized by FTIR, SEM, TG/DTA, XRD and C-13 NMR. The influence of the different conditions (reaction temperature, air or nitrogen atmosphere, reaction time, type of amines and ascorbic acid (AA) concentration) on the grafting reaction was investigated. Results showed that maximum percentage of grafting (58.1%) was achieved at a reaction temperature 70 degrees C, in a nitrogen atmosphere and using dimethylethanolamine (DMEA) as the amine activator. On the basis of the obtained results, the likely reaction mechanism was proposed. Synthesized copolymers have better thermal stability in comparison with their initial components. Copolymers such as Lev-g-PS could potentially have many applications, such as compatibilizers and material for membranes.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Polymers
T1  - Synthesis and characterization of a new type of levan-graft-polystyrene copolymer
VL  - 154
SP  - 20
EP  - 29
DO  - 10.1016/j.carbpol.2016.08.001
ER  - 

@article{
author = "Kekez, Branka and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Pavlović, Vladimir B. and Beškoski, Vladimir and Popović, Aleksandar R. and Vrvić, Miroslav and Nikolić, Vladimir",
year = "2016",
abstract = "Novel macromolecular graft copolymers were synthesized by reaction of the hydroxyl groups of the microbial polysaccharide levan, produced using Bacillus licheniformis, with polystyrene (Lev-g-PS). Synthesis was performed by the free radical reaction using potassium persulfate (PPS) as initiator. The prepared copolymer was characterized by FTIR, SEM, TG/DTA, XRD and C-13 NMR. The influence of the different conditions (reaction temperature, air or nitrogen atmosphere, reaction time, type of amines and ascorbic acid (AA) concentration) on the grafting reaction was investigated. Results showed that maximum percentage of grafting (58.1%) was achieved at a reaction temperature 70 degrees C, in a nitrogen atmosphere and using dimethylethanolamine (DMEA) as the amine activator. On the basis of the obtained results, the likely reaction mechanism was proposed. Synthesized copolymers have better thermal stability in comparison with their initial components. Copolymers such as Lev-g-PS could potentially have many applications, such as compatibilizers and material for membranes.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "Synthesis and characterization of a new type of levan-graft-polystyrene copolymer",
volume = "154",
pages = "20-29",
doi = "10.1016/j.carbpol.2016.08.001"
}

Kekez, B., Gojgić-Cvijović, G., Jakovljević, D., Pavlović, V. B., Beškoski, V., Popović, A. R., Vrvić, M.,& Nikolić, V.. (2016). Synthesis and characterization of a new type of levan-graft-polystyrene copolymer. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 154, 20-29.
https://doi.org/10.1016/j.carbpol.2016.08.001

Kekez B, Gojgić-Cvijović G, Jakovljević D, Pavlović VB, Beškoski V, Popović AR, Vrvić M, Nikolić V. Synthesis and characterization of a new type of levan-graft-polystyrene copolymer. in Carbohydrate Polymers. 2016;154:20-29.
doi:10.1016/j.carbpol.2016.08.001 .

Kekez, Branka, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Pavlović, Vladimir B., Beškoski, Vladimir, Popović, Aleksandar R., Vrvić, Miroslav, Nikolić, Vladimir, "Synthesis and characterization of a new type of levan-graft-polystyrene copolymer" in Carbohydrate Polymers, 154 (2016):20-29,
https://doi.org/10.1016/j.carbpol.2016.08.001 . .

TY  - CONF
AU  - Nikolić, Vladimir
AU  - Kekez, Branka
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Beškoski, Vladimir
AU  - Popović, Aleksandar
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5035
AB  - The aim of this work is the isolation of levan from the Bacillus licheniformis strain and the synthesis of a new levan-polystyrene grafted copolymer.
AB  - Cilj ovog rada je izolovanje levana iz soja Bacillus licheniformis i sinteza novog levan-polistiren graftovanog kopomlimera.
PB  - Belgrade : Serbian Chemical Society
C3  - 53. Savetovanje Srpskog hemijskog društva - Program i kratki izvodi radova, Kragujevac, 10. i 11. jun 2016
T1  - Sinteza graftovanog kopolimera upotrebom mikrobnog levana i polistirena
SP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_cer_5035
ER  - 

@conference{
author = "Nikolić, Vladimir and Kekez, Branka and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Beškoski, Vladimir and Popović, Aleksandar",
year = "2016",
abstract = "The aim of this work is the isolation of levan from the Bacillus licheniformis strain and the synthesis of a new levan-polystyrene grafted copolymer., Cilj ovog rada je izolovanje levana iz soja Bacillus licheniformis i sinteza novog levan-polistiren graftovanog kopomlimera.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "53. Savetovanje Srpskog hemijskog društva - Program i kratki izvodi radova, Kragujevac, 10. i 11. jun 2016",
title = "Sinteza graftovanog kopolimera upotrebom mikrobnog levana i polistirena",
pages = "87",
url = "https://hdl.handle.net/21.15107/rcub_cer_5035"
}

Nikolić, V., Kekez, B., Gojgić-Cvijović, G., Jakovljević, D., Beškoski, V.,& Popović, A.. (2016). Sinteza graftovanog kopolimera upotrebom mikrobnog levana i polistirena. in 53. Savetovanje Srpskog hemijskog društva - Program i kratki izvodi radova, Kragujevac, 10. i 11. jun 2016
Belgrade : Serbian Chemical Society., 87.
https://hdl.handle.net/21.15107/rcub_cer_5035

Nikolić V, Kekez B, Gojgić-Cvijović G, Jakovljević D, Beškoski V, Popović A. Sinteza graftovanog kopolimera upotrebom mikrobnog levana i polistirena. in 53. Savetovanje Srpskog hemijskog društva - Program i kratki izvodi radova, Kragujevac, 10. i 11. jun 2016. 2016;:87.
https://hdl.handle.net/21.15107/rcub_cer_5035 .

Nikolić, Vladimir, Kekez, Branka, Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Beškoski, Vladimir, Popović, Aleksandar, "Sinteza graftovanog kopolimera upotrebom mikrobnog levana i polistirena" in 53. Savetovanje Srpskog hemijskog društva - Program i kratki izvodi radova, Kragujevac, 10. i 11. jun 2016 (2016):87,
https://hdl.handle.net/21.15107/rcub_cer_5035 .

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 . .