TY  - JOUR
AU  - Embirsh, Hifa Salah Adeen
AU  - Stajčić, Ivana
AU  - Gržetić, Jelena
AU  - Mladenović, Ivana O.
AU  - Anđelković, Boban
AU  - Marinković, Aleksandar
AU  - Vuksanović, Marija M.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6610
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6663
AB  - This paper presents sustainable technology for environmentally friendly composite production. Biobased unsaturated polyester resin (b-UPR), synthesized from waste polyethylene terephthalate (PET) glycosylate and renewable origin maleic anhydride (MAnh) and propylene glycol(PG), was reinforced with unmodified and vinyl-modified biosilica nanoparticles obtained fromrice husk. The structural and morphological properties of the obtained particles, b-UPR, as well ascomposites, were characterized by Fourier-transform infrared spectroscopy (FTIR), nuclear magneticresonance spectroscopy (NMR), scanning electron microscopy (SEM), and transmission electronmicroscopy (TEM) techniques. The study of the influence of biosilica modification on the mechanicalproperties of composites was supported by hardness modeling. Improvement of the tensile strengthof the b-UPR-based composite at 2.5 wt.% addition of biosilica modified with vinyl silane, named“b-UPR/SiO2-V” composite, has been achieved with 88% increase. The thermal aging process appliedto the b-UPR/SiO2-V composite, which simulates use over the product’s lifetime, leads to the deterioration of composites that were used as fillers in commercial unsaturated polyester resin (c-UPR).The grinded artificially aged b-UPR composites were used as filler in c-UPR for the production of atable top layer with outstanding mechanical properties, i.e., impact resistance and microhardness, aswell as fire resistance rated in the V-0 category according to the UL-94 test. Developing sustainablecomposites that are chemically synthesized from renewable sources is important from the aspect ofpreserving the environment and existing resources as well as the extending their life cycle.
PB  - MDPI
T2  - Polymers
T1  - Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles
IS  - 18
SP  - 3756
VL  - 15
DO  - 10.3390/polym15183756
ER  - 

@article{
author = "Embirsh, Hifa Salah Adeen and Stajčić, Ivana and Gržetić, Jelena and Mladenović, Ivana O. and Anđelković, Boban and Marinković, Aleksandar and Vuksanović, Marija M.",
year = "2023",
abstract = "This paper presents sustainable technology for environmentally friendly composite production. Biobased unsaturated polyester resin (b-UPR), synthesized from waste polyethylene terephthalate (PET) glycosylate and renewable origin maleic anhydride (MAnh) and propylene glycol(PG), was reinforced with unmodified and vinyl-modified biosilica nanoparticles obtained fromrice husk. The structural and morphological properties of the obtained particles, b-UPR, as well ascomposites, were characterized by Fourier-transform infrared spectroscopy (FTIR), nuclear magneticresonance spectroscopy (NMR), scanning electron microscopy (SEM), and transmission electronmicroscopy (TEM) techniques. The study of the influence of biosilica modification on the mechanicalproperties of composites was supported by hardness modeling. Improvement of the tensile strengthof the b-UPR-based composite at 2.5 wt.% addition of biosilica modified with vinyl silane, named“b-UPR/SiO2-V” composite, has been achieved with 88% increase. The thermal aging process appliedto the b-UPR/SiO2-V composite, which simulates use over the product’s lifetime, leads to the deterioration of composites that were used as fillers in commercial unsaturated polyester resin (c-UPR).The grinded artificially aged b-UPR composites were used as filler in c-UPR for the production of atable top layer with outstanding mechanical properties, i.e., impact resistance and microhardness, aswell as fire resistance rated in the V-0 category according to the UL-94 test. Developing sustainablecomposites that are chemically synthesized from renewable sources is important from the aspect ofpreserving the environment and existing resources as well as the extending their life cycle.",
publisher = "MDPI",
journal = "Polymers",
title = "Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles",
number = "18",
pages = "3756",
volume = "15",
doi = "10.3390/polym15183756"
}

Embirsh, H. S. A., Stajčić, I., Gržetić, J., Mladenović, I. O., Anđelković, B., Marinković, A.,& Vuksanović, M. M.. (2023). Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles. in Polymers
MDPI., 15(18), 3756.
https://doi.org/10.3390/polym15183756

Embirsh HSA, Stajčić I, Gržetić J, Mladenović IO, Anđelković B, Marinković A, Vuksanović MM. Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles. in Polymers. 2023;15(18):3756.
doi:10.3390/polym15183756 .

Embirsh, Hifa Salah Adeen, Stajčić, Ivana, Gržetić, Jelena, Mladenović, Ivana O., Anđelković, Boban, Marinković, Aleksandar, Vuksanović, Marija M., "Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles" in Polymers, 15, no. 18 (2023):3756,
https://doi.org/10.3390/polym15183756 . .

TY  - JOUR
AU  - Popović, Aleksandar R.
AU  - Anđelković, Boban D.
AU  - Đorđević, Dragana S.
AU  - Sakan, Sanja M.
AU  - Vujisić, Ljubodrag V.
AU  - Veličković, Sava
AU  - Relić, Dubravka
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5377
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.
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
EP  - 40
IS  - 1
SP  - 27
VL  - 87
DO  - 10.2298/JSC210901090P
ER  - 

@article{
author = "Popović, Aleksandar R. and Anđelković, Boban D. and Đorđević, Dragana S. and Sakan, Sanja M. 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.",
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",
pages = "40-27",
number = "1",
volume = "87",
doi = "10.2298/JSC210901090P"
}

Popović, A. R., Anđelković, B. D., Đorđević, D. S., Sakan, S. M., 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, 87(1), 27-40.
https://doi.org/10.2298/JSC210901090P

Popović AR, Anđelković BD, Đorđević DS, Sakan SM, 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 S., Sakan, Sanja M., 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  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Anđelković, Boban D.
AU  - Petrović, Slobodan
AU  - Vuković, Dragan
AU  - Prlainović, Nevena
AU  - Mijin, Dušan
AU  - Nikolić, Nebojša
AU  - Avramov-Ivić, Milka
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3907
AB  - Glucose biosensor containing cysteine (Cys), glutaraldehyde (GA) and glucose oxidase (GOx) onto gold electrode is constructed and already electrochemically tested. Now, the electrochemical behavior of biosensor in human serum is further investigated and supported by morphological characterization of layers for the first time. The morphology and microstructure of layers was examined by Fourier transformed infra red spectroscopy (FTIR), atomic force (AFM) and optical microscopy (OM). The electrochemical indication that the Cys-GA-GOx film on Au surface is not compact and that there were some bare regions which remain catalytically active is supported by AFM and OM results. The construction and the nature of bonding of Au-Cys-GA-GOx biosensor layers is confirmed by the FTIR study.
PB  - Electrochemical Science Group, Beograd
T2  - International Journal of Electrochemical Science
T1  - Electrochemical glucose biosensor with the characterization of surface morphology and content of glucose oxidase-glutaraldehyde-cysteine layers on gold electrode
EP  - 12348
IS  - 12
SP  - 12340
VL  - 13
DO  - 10.20964/2018.12.59
ER  - 

@article{
author = "Lović, Jelena and Stevanović, Sanja and Anđelković, Boban D. and Petrović, Slobodan and Vuković, Dragan and Prlainović, Nevena and Mijin, Dušan and Nikolić, Nebojša and Avramov-Ivić, Milka",
year = "2018",
abstract = "Glucose biosensor containing cysteine (Cys), glutaraldehyde (GA) and glucose oxidase (GOx) onto gold electrode is constructed and already electrochemically tested. Now, the electrochemical behavior of biosensor in human serum is further investigated and supported by morphological characterization of layers for the first time. The morphology and microstructure of layers was examined by Fourier transformed infra red spectroscopy (FTIR), atomic force (AFM) and optical microscopy (OM). The electrochemical indication that the Cys-GA-GOx film on Au surface is not compact and that there were some bare regions which remain catalytically active is supported by AFM and OM results. The construction and the nature of bonding of Au-Cys-GA-GOx biosensor layers is confirmed by the FTIR study.",
publisher = "Electrochemical Science Group, Beograd",
journal = "International Journal of Electrochemical Science",
title = "Electrochemical glucose biosensor with the characterization of surface morphology and content of glucose oxidase-glutaraldehyde-cysteine layers on gold electrode",
pages = "12348-12340",
number = "12",
volume = "13",
doi = "10.20964/2018.12.59"
}

Lović, J., Stevanović, S., Anđelković, B. D., Petrović, S., Vuković, D., Prlainović, N., Mijin, D., Nikolić, N.,& Avramov-Ivić, M.. (2018). Electrochemical glucose biosensor with the characterization of surface morphology and content of glucose oxidase-glutaraldehyde-cysteine layers on gold electrode. in International Journal of Electrochemical Science
Electrochemical Science Group, Beograd., 13(12), 12340-12348.
https://doi.org/10.20964/2018.12.59

Lović J, Stevanović S, Anđelković BD, Petrović S, Vuković D, Prlainović N, Mijin D, Nikolić N, Avramov-Ivić M. Electrochemical glucose biosensor with the characterization of surface morphology and content of glucose oxidase-glutaraldehyde-cysteine layers on gold electrode. in International Journal of Electrochemical Science. 2018;13(12):12340-12348.
doi:10.20964/2018.12.59 .

Lović, Jelena, Stevanović, Sanja, Anđelković, Boban D., Petrović, Slobodan, Vuković, Dragan, Prlainović, Nevena, Mijin, Dušan, Nikolić, Nebojša, Avramov-Ivić, Milka, "Electrochemical glucose biosensor with the characterization of surface morphology and content of glucose oxidase-glutaraldehyde-cysteine layers on gold electrode" in International Journal of Electrochemical Science, 13, no. 12 (2018):12340-12348,
https://doi.org/10.20964/2018.12.59 . .