Ponjavić, Marijana

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Authority KeyName Variants
orcid::0000-0003-0264-8639
  • Ponjavić, Marijana (15)
Projects
Synthesis and characterization of novel functional polymers and polymeric nanocomposites Microbial diversity study and characterization of beneficial environmental microorganisms
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200042 (University of Belgrade, Institute of Molecular Genetics and Genetic Engineering) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200135 (University of Belgrade, Faculty of Technology and Metallurgy)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) AdCatFC - Advanced Catalysts for Low Temperature Fuel Cells: From Model System to Sustainable Catalysts
European Union's Horizon 2020 research and innovation program under grant agreement No. 870292 (BioICEP) Horizon 2020 research and innovation programme under grant agreement No 870292 (BioICEP)
BioECOLogics - Value-added biologics through eco-sustainable routes National Natural Science Foundation of China (No. 31961133016, 31961133015, and 31961133014)
Polymeric material (PHO) was produced under grant TechMatStrateg no. TECHMATSTRATEG2/ 407507/1/NCBR/2019 Project LA/P/0140/202019 of the Associate Laboratory Institute for Health and Bioeconomy—i4HB
Romanian Ministry of Education and Research, CNCS—UEFISCDI, project number PN-III-P1-1.1-TE-2019-0664, within PNCDI-III The European Union’s Horizon 2020 Research , grant agreement No. 870292 (BioICEP)
The national funds from FCT—Fundação para a Ciência e a Tecnologia, in the scope of the project UIDP/04378/2020 and UIDB/04378/2020 of the Research Unit on Applied Molecular Biosciences—UCIBIO The National Natural Science Foundation of China (Nos. 31961133014)
The National Natural Science Foundation of China (Nos. 31961133015) The National Natural Science Foundation of China (Nos. 31961133016)

Author's Bibliography

Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin

Ponjavić, Marijana; Malagurski, Ivana; Lazić, Jelena; Jeremić, Sanja; Pavlović, Vladimir; Prlainović, Nevena; Maksimović, Vesna; Ćosović, Vladan; Atanase, Leonard Ionut

(Switzerland : Multidisciplinary Digital Publishing Institute (MDPI), 2023)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Malagurski, Ivana
AU  - Lazić, Jelena
AU  - Jeremić, Sanja
AU  - Pavlović, Vladimir
AU  - Prlainović, Nevena
AU  - Maksimović, Vesna
AU  - Ćosović, Vladan
AU  - Atanase, Leonard Ionut
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5690
AB  - The quest for sustainable biomaterials with excellent biocompatibility and tailorable
properties has put polyhydroxyalkanoates (PHAs) into the research spotlight. However, high production
costs and the lack of bioactivity limit their market penetration. To address this, poly(3-
hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was combined with a bacterial pigment with strong
anticancer activity, prodigiosin (PG), to obtain functionally enhanced PHBV-based biomaterials. The
samples were produced in the form of films 115.6–118.8  m in thickness using the solvent casting
method. The effects of PG incorporation on the physical properties (morphology, biopolymer crystallinity
and thermal stability) and functionality of the obtained biomaterials were investigated. PG
has acted as a nucleating agent, in turn affecting the degree of crystallinity, thermal stability and
morphology of the films. All samples with PG had a more organized internal structure and higher
melting and degradation temperatures. The calculated degree of crystallinity of the PHBV copolymer
was 53%, while the PG1, PG3 and PG3 films had values of 64.0%, 63.9% and 69.2%, respectively.
Cytotoxicity studies have shown the excellent anticancer activity of films against HCT116 (colon
cancer) cells, thus advancing PHBV biomedical application potential.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - International Journal of Molecular Sciences
T1  - Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin
VL  - 24
SP  - 1906
DO  - 10.3390/ijms24031906
ER  - 
@article{
author = "Ponjavić, Marijana and Malagurski, Ivana and Lazić, Jelena and Jeremić, Sanja and Pavlović, Vladimir and Prlainović, Nevena and Maksimović, Vesna and Ćosović, Vladan and Atanase, Leonard Ionut",
year = "2023",
abstract = "The quest for sustainable biomaterials with excellent biocompatibility and tailorable
properties has put polyhydroxyalkanoates (PHAs) into the research spotlight. However, high production
costs and the lack of bioactivity limit their market penetration. To address this, poly(3-
hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was combined with a bacterial pigment with strong
anticancer activity, prodigiosin (PG), to obtain functionally enhanced PHBV-based biomaterials. The
samples were produced in the form of films 115.6–118.8  m in thickness using the solvent casting
method. The effects of PG incorporation on the physical properties (morphology, biopolymer crystallinity
and thermal stability) and functionality of the obtained biomaterials were investigated. PG
has acted as a nucleating agent, in turn affecting the degree of crystallinity, thermal stability and
morphology of the films. All samples with PG had a more organized internal structure and higher
melting and degradation temperatures. The calculated degree of crystallinity of the PHBV copolymer
was 53%, while the PG1, PG3 and PG3 films had values of 64.0%, 63.9% and 69.2%, respectively.
Cytotoxicity studies have shown the excellent anticancer activity of films against HCT116 (colon
cancer) cells, thus advancing PHBV biomedical application potential.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "International Journal of Molecular Sciences",
title = "Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin",
volume = "24",
pages = "1906",
doi = "10.3390/ijms24031906"
}
Ponjavić, M., Malagurski, I., Lazić, J., Jeremić, S., Pavlović, V., Prlainović, N., Maksimović, V., Ćosović, V.,& Atanase, L. I.. (2023). Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin. in International Journal of Molecular Sciences
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 24, 1906.
https://doi.org/10.3390/ijms24031906
Ponjavić M, Malagurski I, Lazić J, Jeremić S, Pavlović V, Prlainović N, Maksimović V, Ćosović V, Atanase LI. Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin. in International Journal of Molecular Sciences. 2023;24:1906.
doi:10.3390/ijms24031906 .
Ponjavić, Marijana, Malagurski, Ivana, Lazić, Jelena, Jeremić, Sanja, Pavlović, Vladimir, Prlainović, Nevena, Maksimović, Vesna, Ćosović, Vladan, Atanase, Leonard Ionut, "Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin" in International Journal of Molecular Sciences, 24 (2023):1906,
https://doi.org/10.3390/ijms24031906 . .
2
10

Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications

Solarz, Daria; Witko, Tomasz; Karcz, Robert; Malagurski, Ivana; Ponjavić, Marijana; Levic, Steva; Nešić, Aleksandra; Guzik, Maciej; Savić, Sanja; Nikodinović-Runić, Jasmina

(Royal Society of Chemistry (RSC), 2023)

TY  - JOUR
AU  - Solarz, Daria
AU  - Witko, Tomasz
AU  - Karcz, Robert
AU  - Malagurski, Ivana
AU  - Ponjavić, Marijana
AU  - Levic, Steva
AU  - Nešić, Aleksandra
AU  - Guzik, Maciej
AU  - Savić, Sanja
AU  - Nikodinović-Runić, Jasmina
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7170
AB  - Polyhydroxyoctanoate, as a biocompatible and biodegradable biopolymer, represents an ideal candidate for biomedical applications. However, physical properties make it unsuitable for electrospinning, currently the most widely used technique for fabrication of fibrous scaffolds. To overcome this, it was blended with polylactic acid and polymer blend fibrous biomaterials were produced by electrospinning. The obtained PLA/PHO fibers were cylindrical, smaller in size, more hydrophilic and had a higher degree of biopolymer crystallinity and more favorable mechanical properties in comparison to the pure PLA sample. Cytotoxicity evaluation with human lung fibroblasts (MRC5 cells) combined with confocal microscopy were used to visualize mouse embryonic fibroblasts (MEF 3T3 cell line) migration and distribution showed that PLA/PHO samples support exceptional cell adhesion and viability, indicating excellent biocompatibility. The obtained results suggest that PLA/PHO fibrous biomaterials can be potentially used as biocompatible, biomimetic scaffolds for tissue engineering applications.
PB  - Royal Society of Chemistry (RSC)
T2  - RSC Advances
T1  - Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications
VL  - 13
IS  - 34
SP  - 24112
EP  - 24128
DO  - 10.1039/D3RA03021K
ER  - 
@article{
author = "Solarz, Daria and Witko, Tomasz and Karcz, Robert and Malagurski, Ivana and Ponjavić, Marijana and Levic, Steva and Nešić, Aleksandra and Guzik, Maciej and Savić, Sanja and Nikodinović-Runić, Jasmina",
year = "2023",
abstract = "Polyhydroxyoctanoate, as a biocompatible and biodegradable biopolymer, represents an ideal candidate for biomedical applications. However, physical properties make it unsuitable for electrospinning, currently the most widely used technique for fabrication of fibrous scaffolds. To overcome this, it was blended with polylactic acid and polymer blend fibrous biomaterials were produced by electrospinning. The obtained PLA/PHO fibers were cylindrical, smaller in size, more hydrophilic and had a higher degree of biopolymer crystallinity and more favorable mechanical properties in comparison to the pure PLA sample. Cytotoxicity evaluation with human lung fibroblasts (MRC5 cells) combined with confocal microscopy were used to visualize mouse embryonic fibroblasts (MEF 3T3 cell line) migration and distribution showed that PLA/PHO samples support exceptional cell adhesion and viability, indicating excellent biocompatibility. The obtained results suggest that PLA/PHO fibrous biomaterials can be potentially used as biocompatible, biomimetic scaffolds for tissue engineering applications.",
publisher = "Royal Society of Chemistry (RSC)",
journal = "RSC Advances",
title = "Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications",
volume = "13",
number = "34",
pages = "24112-24128",
doi = "10.1039/D3RA03021K"
}
Solarz, D., Witko, T., Karcz, R., Malagurski, I., Ponjavić, M., Levic, S., Nešić, A., Guzik, M., Savić, S.,& Nikodinović-Runić, J.. (2023). Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications. in RSC Advances
Royal Society of Chemistry (RSC)., 13(34), 24112-24128.
https://doi.org/10.1039/D3RA03021K
Solarz D, Witko T, Karcz R, Malagurski I, Ponjavić M, Levic S, Nešić A, Guzik M, Savić S, Nikodinović-Runić J. Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications. in RSC Advances. 2023;13(34):24112-24128.
doi:10.1039/D3RA03021K .
Solarz, Daria, Witko, Tomasz, Karcz, Robert, Malagurski, Ivana, Ponjavić, Marijana, Levic, Steva, Nešić, Aleksandra, Guzik, Maciej, Savić, Sanja, Nikodinović-Runić, Jasmina, "Biological and physiochemical studies of electrospun polylactid/polyhydroxyoctanoate PLA/ P(3HO) scaffolds for tissue engineering applications" in RSC Advances, 13, no. 34 (2023):24112-24128,
https://doi.org/10.1039/D3RA03021K . .
3
1
1

Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers

Ponjavić, Marijana; Nikolić, Marija S.; Jevtić, Sanja; Jeremić, Sanja; Đokić, Lidija; Đonlagić, Jasna

(Serbia : Serbian Chemical Society, 2022)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Jevtić, Sanja
AU  - Jeremić, Sanja
AU  - Đokić, Lidija
AU  - Đonlagić, Jasna
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5392
AB  - The present study reports the potential application of star-shaped poly(ε-caprolactones) with different number of arms as new drug delivery matrix. Linear and star-shaped PCL ibuprofen loaded microspheres were prepared using oil-in-water (o/w) solvent evaporation technique and characterized with FTIR, DSC, XRD and SEM analysis. High yield, encapsulation efficiency and drug loadings were obtained for all microspheres. FTIR analysis revealed the existence of interactions between polymer matrix and drug, while the DSC analysis suggested that drug was encapsulated in an amorphous form. SEM analysis confirmed that regular, spherical in shape star-shaped microspheres, with diameter between 80 and 90 μm, were obtained, while quite larger microspheres, 110 μm, were prepared from linear PCL. The advantage of using star-shaped PCL microspheres instead of linear PCL was seen from drug release profiles which demonstrated higher amount of drug released from star-shaped polymer matrix as a consequence of their branched, flexible structure. Microspheres prepared from the polymers with the most branched structure showed the highest amount of the released drug after 24 h. Finally, cytotoxicity tests, performed using normal human fibroblasts (MRC5), indicated the absence of cytotoxicity at lower concentrations of microspheres proving the great potential of star-shaped PCL systems in comparison to linear ones.
AB  - У оквиру ове студије је приказана потенцијална примена разгранатих поли(ε-кап-
ролактона) са различитим бројем грана као новог полимерног матрикса за уношење
лекова у организам. Микросфере линеарног и разгранатих PCL са инкапсулираним ибу-
профеном су припремљене применом технике отпаравања лако испарљивог растварача
из емулзије “уље у води” (oil-in-water, o/w) и карактерисане помоћу FTIR, DSC, XRD и
SEM анализе. За све микросфере су добијени висок принос, висока ефикасност инкaпсу-
лације и висок садржај лека. FTIR анализом је потврђено постојање интеракција између
полимерног матрикса и лека, док је DSC анализа указала да је лек инкапсулиран у
аморфном облику. SEM анализа је потврдила да су добијене микросфере разгранатих
PCL правилног, сферичног облика, са пречником између 80 до 90 μm, док су знатно веће
микросфере, 110 μm, припремљене од линеарног PCL. Предност употребе микросфера
разгранатих PCL уместо линеарног PCL се види из профила отпуштања лека, који су
показали већу количину отпуштеног лека из микросфера разгранатог полимернe мат-
рице као последица њихове разгранате, флексибилне структуре. Микросфере припре-
мљене од полимера са најразгранитијом структуром су показале највећу количину
отпуштеног лека након 24 h. Тестови цитотоксичности, изведени коришћењем ћелија
нормалних, хуманих фибробласта (MRC5), показали су одсуство цитотоксичности при
нижим концентрацијама микросфера доказујући велики потенцијал разгранатих PCL
система у поређењу са линеарним.
PB  - Serbia : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers
T1  - Разгранати поли (ε-капролактони) са добро одређеном архитектуром као потенцијални носачи лекова
VL  - 87
IS  - 9
SP  - 1075
EP  - 1090
DO  - 10.2298/JSC220202032P
ER  - 
@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Jevtić, Sanja and Jeremić, Sanja and Đokić, Lidija and Đonlagić, Jasna",
year = "2022",
abstract = "The present study reports the potential application of star-shaped poly(ε-caprolactones) with different number of arms as new drug delivery matrix. Linear and star-shaped PCL ibuprofen loaded microspheres were prepared using oil-in-water (o/w) solvent evaporation technique and characterized with FTIR, DSC, XRD and SEM analysis. High yield, encapsulation efficiency and drug loadings were obtained for all microspheres. FTIR analysis revealed the existence of interactions between polymer matrix and drug, while the DSC analysis suggested that drug was encapsulated in an amorphous form. SEM analysis confirmed that regular, spherical in shape star-shaped microspheres, with diameter between 80 and 90 μm, were obtained, while quite larger microspheres, 110 μm, were prepared from linear PCL. The advantage of using star-shaped PCL microspheres instead of linear PCL was seen from drug release profiles which demonstrated higher amount of drug released from star-shaped polymer matrix as a consequence of their branched, flexible structure. Microspheres prepared from the polymers with the most branched structure showed the highest amount of the released drug after 24 h. Finally, cytotoxicity tests, performed using normal human fibroblasts (MRC5), indicated the absence of cytotoxicity at lower concentrations of microspheres proving the great potential of star-shaped PCL systems in comparison to linear ones., У оквиру ове студије је приказана потенцијална примена разгранатих поли(ε-кап-
ролактона) са различитим бројем грана као новог полимерног матрикса за уношење
лекова у организам. Микросфере линеарног и разгранатих PCL са инкапсулираним ибу-
профеном су припремљене применом технике отпаравања лако испарљивог растварача
из емулзије “уље у води” (oil-in-water, o/w) и карактерисане помоћу FTIR, DSC, XRD и
SEM анализе. За све микросфере су добијени висок принос, висока ефикасност инкaпсу-
лације и висок садржај лека. FTIR анализом је потврђено постојање интеракција између
полимерног матрикса и лека, док је DSC анализа указала да је лек инкапсулиран у
аморфном облику. SEM анализа је потврдила да су добијене микросфере разгранатих
PCL правилног, сферичног облика, са пречником између 80 до 90 μm, док су знатно веће
микросфере, 110 μm, припремљене од линеарног PCL. Предност употребе микросфера
разгранатих PCL уместо линеарног PCL се види из профила отпуштања лека, који су
показали већу количину отпуштеног лека из микросфера разгранатог полимернe мат-
рице као последица њихове разгранате, флексибилне структуре. Микросфере припре-
мљене од полимера са најразгранитијом структуром су показале највећу количину
отпуштеног лека након 24 h. Тестови цитотоксичности, изведени коришћењем ћелија
нормалних, хуманих фибробласта (MRC5), показали су одсуство цитотоксичности при
нижим концентрацијама микросфера доказујући велики потенцијал разгранатих PCL
система у поређењу са линеарним.",
publisher = "Serbia : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers, Разгранати поли (ε-капролактони) са добро одређеном архитектуром као потенцијални носачи лекова",
volume = "87",
number = "9",
pages = "1075-1090",
doi = "10.2298/JSC220202032P"
}
Ponjavić, M., Nikolić, M. S., Jevtić, S., Jeremić, S., Đokić, L.,& Đonlagić, J.. (2022). Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers. in Journal of the Serbian Chemical Society
Serbia : Serbian Chemical Society., 87(9), 1075-1090.
https://doi.org/10.2298/JSC220202032P
Ponjavić M, Nikolić MS, Jevtić S, Jeremić S, Đokić L, Đonlagić J. Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers. in Journal of the Serbian Chemical Society. 2022;87(9):1075-1090.
doi:10.2298/JSC220202032P .
Ponjavić, Marijana, Nikolić, Marija S., Jevtić, Sanja, Jeremić, Sanja, Đokić, Lidija, Đonlagić, Jasna, "Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers" in Journal of the Serbian Chemical Society, 87, no. 9 (2022):1075-1090,
https://doi.org/10.2298/JSC220202032P . .

Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation

Ponjavić, Marijana; Stevanović, Sanja; Nikodinović-Runić, Jasmina; Jeremić, Sanja; Ćosović, Vladan; Maksimović, Vesna

(Elsevier BV, 2022)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Stevanović, Sanja
AU  - Nikodinović-Runić, Jasmina
AU  - Jeremić, Sanja
AU  - Ćosović, Vladan
AU  - Maksimović, Vesna
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5573
AB  - Bacterial nanocellulose, BNC, has emerged as a new class of nanomaterials recognized as renewable, biodegradable, biocompatible and material for versatile applications. BNC also proved as a perfect support matrix for metallic nanoparticle synthesis and appeared as suitable alternative for widely used carbon based materials. Following the idea to replace commonly used carbon based materials for platinum supports with the green and sustainable one, BNC appeared as an excellent candidate. Herein, microwave assisted synthesis has been reported for the first time for platinum nanoparticles supported on BNC as green material. Bacterial nanocelullose-platinum catalyst, Pt/BNC, was investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), atomic force microscopy (AFM), X-ray diffractometry (XRD) and transmission-electron microscopy (TEM) analysis. The obtained results confirmed successful synthesis of new Pt-based catalyst. It was found that Pt/BNC catalyst has high electrocatalytic performance in methanol oxidation reaction. Green/sustainable catalytic system is highly desirable and provided by the elegant microwave assisted synthesis of Pt/BNC will pave the way for a larger scale application and expedite the market penetration of such fuel cells.
PB  - Elsevier BV
T2  - International Journal of Biological Macromolecules
T1  - Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation
VL  - 223
SP  - 1474
EP  - 1484
DO  - 10.1016/j.ijbiomac.2022.10.278
ER  - 
@article{
author = "Ponjavić, Marijana and Stevanović, Sanja and Nikodinović-Runić, Jasmina and Jeremić, Sanja and Ćosović, Vladan and Maksimović, Vesna",
year = "2022",
abstract = "Bacterial nanocellulose, BNC, has emerged as a new class of nanomaterials recognized as renewable, biodegradable, biocompatible and material for versatile applications. BNC also proved as a perfect support matrix for metallic nanoparticle synthesis and appeared as suitable alternative for widely used carbon based materials. Following the idea to replace commonly used carbon based materials for platinum supports with the green and sustainable one, BNC appeared as an excellent candidate. Herein, microwave assisted synthesis has been reported for the first time for platinum nanoparticles supported on BNC as green material. Bacterial nanocelullose-platinum catalyst, Pt/BNC, was investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), atomic force microscopy (AFM), X-ray diffractometry (XRD) and transmission-electron microscopy (TEM) analysis. The obtained results confirmed successful synthesis of new Pt-based catalyst. It was found that Pt/BNC catalyst has high electrocatalytic performance in methanol oxidation reaction. Green/sustainable catalytic system is highly desirable and provided by the elegant microwave assisted synthesis of Pt/BNC will pave the way for a larger scale application and expedite the market penetration of such fuel cells.",
publisher = "Elsevier BV",
journal = "International Journal of Biological Macromolecules",
title = "Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation",
volume = "223",
pages = "1474-1484",
doi = "10.1016/j.ijbiomac.2022.10.278"
}
Ponjavić, M., Stevanović, S., Nikodinović-Runić, J., Jeremić, S., Ćosović, V.,& Maksimović, V.. (2022). Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation. in International Journal of Biological Macromolecules
Elsevier BV., 223, 1474-1484.
https://doi.org/10.1016/j.ijbiomac.2022.10.278
Ponjavić M, Stevanović S, Nikodinović-Runić J, Jeremić S, Ćosović V, Maksimović V. Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation. in International Journal of Biological Macromolecules. 2022;223:1474-1484.
doi:10.1016/j.ijbiomac.2022.10.278 .
Ponjavić, Marijana, Stevanović, Sanja, Nikodinović-Runić, Jasmina, Jeremić, Sanja, Ćosović, Vladan, Maksimović, Vesna, "Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation" in International Journal of Biological Macromolecules, 223 (2022):1474-1484,
https://doi.org/10.1016/j.ijbiomac.2022.10.278 . .
3
2
3

Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)

Atanase, Leonard Ionut; Salhi, Slim; Cucoveica, Oana; Ponjavić, Marijana; Nikodinović-Runić, Jasmina; Delaite, Christelle

(MDPI AG, 2022)

TY  - JOUR
AU  - Atanase, Leonard Ionut
AU  - Salhi, Slim
AU  - Cucoveica, Oana
AU  - Ponjavić, Marijana
AU  - Nikodinović-Runić, Jasmina
AU  - Delaite, Christelle
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5581
AB  - Biodegradable polymers contain chains that are hydrolytically or enzymatically cleaved, resulting in soluble degradation products. Biodegradability is particularly desired in biomedical applications, in which degradation of the polymer ensures clearance from the body and eliminates the need for retrieval or explant. In this study, a homologues series of poly(ε-caprolactone)-b-poly(ethylene adipate)-b-poly(ε-caprolactone) (PCL-b-PEA-b-PCL) block copolymers, with constant PEA molar mass and different PCL sequence lengths was obtained. The starting point of these copolymers was a dihydroxy-PEA precursor with a molar mass (Mn) of 2500 g/mol. Mn values of the PCL varied between 1000 and 10,000 g/mol. Both the precursors and the copolymers were characterized using different physicochemical methods, such as: NMR, SEC, Maldi-TOFF, DSC, and ATG. The molecular characteristics of the copolymers were in a direct correlation with the sequence length of the PCL. Enzymatic degradability studies were also conducted by using cell-free extract containing Pseudomonas aeruginosa PAO1 for 10 and 21 days, and it appeared that the presence of the PEA central sequence has an important influence on the biodegradability of the copolymer samples. In fact, copolymer PCL7000-PEA2500-PCL7000 had a weight loss of around 50% after 10 days whereas the weight loss of the homopolymer PCL, with a similar Mn of 14,000 g/mol, was only 6%. The results obtained in this study indicate that these copolymer samples can be further used for the preparation of drug delivery systems with modulated biodegradability.
PB  - MDPI AG
T2  - Polymers
T1  - Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)
VL  - 14
IS  - 18
SP  - 3736
DO  - 10.3390/polym14183736
ER  - 
@article{
author = "Atanase, Leonard Ionut and Salhi, Slim and Cucoveica, Oana and Ponjavić, Marijana and Nikodinović-Runić, Jasmina and Delaite, Christelle",
year = "2022",
abstract = "Biodegradable polymers contain chains that are hydrolytically or enzymatically cleaved, resulting in soluble degradation products. Biodegradability is particularly desired in biomedical applications, in which degradation of the polymer ensures clearance from the body and eliminates the need for retrieval or explant. In this study, a homologues series of poly(ε-caprolactone)-b-poly(ethylene adipate)-b-poly(ε-caprolactone) (PCL-b-PEA-b-PCL) block copolymers, with constant PEA molar mass and different PCL sequence lengths was obtained. The starting point of these copolymers was a dihydroxy-PEA precursor with a molar mass (Mn) of 2500 g/mol. Mn values of the PCL varied between 1000 and 10,000 g/mol. Both the precursors and the copolymers were characterized using different physicochemical methods, such as: NMR, SEC, Maldi-TOFF, DSC, and ATG. The molecular characteristics of the copolymers were in a direct correlation with the sequence length of the PCL. Enzymatic degradability studies were also conducted by using cell-free extract containing Pseudomonas aeruginosa PAO1 for 10 and 21 days, and it appeared that the presence of the PEA central sequence has an important influence on the biodegradability of the copolymer samples. In fact, copolymer PCL7000-PEA2500-PCL7000 had a weight loss of around 50% after 10 days whereas the weight loss of the homopolymer PCL, with a similar Mn of 14,000 g/mol, was only 6%. The results obtained in this study indicate that these copolymer samples can be further used for the preparation of drug delivery systems with modulated biodegradability.",
publisher = "MDPI AG",
journal = "Polymers",
title = "Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)",
volume = "14",
number = "18",
pages = "3736",
doi = "10.3390/polym14183736"
}
Atanase, L. I., Salhi, S., Cucoveica, O., Ponjavić, M., Nikodinović-Runić, J.,& Delaite, C.. (2022). Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone). in Polymers
MDPI AG., 14(18), 3736.
https://doi.org/10.3390/polym14183736
Atanase LI, Salhi S, Cucoveica O, Ponjavić M, Nikodinović-Runić J, Delaite C. Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone). in Polymers. 2022;14(18):3736.
doi:10.3390/polym14183736 .
Atanase, Leonard Ionut, Salhi, Slim, Cucoveica, Oana, Ponjavić, Marijana, Nikodinović-Runić, Jasmina, Delaite, Christelle, "Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)" in Polymers, 14, no. 18 (2022):3736,
https://doi.org/10.3390/polym14183736 . .
7
4

Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability

Ponjavić, Marijana; Jevtić, Sanja; Nikolić, Marija S.

(Springer, 2022)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Jevtić, Sanja
AU  - Nikolić, Marija S.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5599
AB  - In order to obtain polymers with preserved thermal properties and tunable biodegradability multiblock copolymers comprising blocks of biodegradable polyesters poly(ε-caprolactone) (PCL) and poly(butylene succinate) (PBS) were successfully synthesized through chain-extension reaction using hexamethylene diisocyanate. Two series of copolymers with different length of PCL block and varying ratio of PCL and PBS block through each series were synthesized. PCL-b-PBS copolymers were characterized by NMR, FTIR, WAXS, DSC, TG and DMA in solid state. Special attention was given to the investigation of the influence of composition and structure of multiblock copolymers on their biodegradability properties. Biodegradability of these multiblock copolymers was assessed through hydrolysis in alkaline medium and soil burial test. Each block in multiblock copolymers crystallized separately, with adverse influence of its presence on degree of crystallinity and, in much lesser extent, on melting temperature of the second phase. Multiblock copolymers showed high thermal stability, comparable to corresponding homopolymers. Mechanical strength, deduced from storage modulus in glassy and rubbery state, was a firm function of composition. Copolymers rich in PBS were more prone to degradation through simple hydrolysis in alkaline medium, while PCL-rich copolymers were more susceptible to degradation by soil microorganisms. Through the change in copolymer composition, degradability in different environments could be tailored without compromising materials’ thermal properties. Besides composition, molecular weight of copolymers had the major influence on degradability properties.
PB  - Springer
T2  - Journal of Polymer Research
T1  - Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability
VL  - 29
IS  - 7
DO  - 10.1007/s10965-022-03144-w
ER  - 
@article{
author = "Ponjavić, Marijana and Jevtić, Sanja and Nikolić, Marija S.",
year = "2022",
abstract = "In order to obtain polymers with preserved thermal properties and tunable biodegradability multiblock copolymers comprising blocks of biodegradable polyesters poly(ε-caprolactone) (PCL) and poly(butylene succinate) (PBS) were successfully synthesized through chain-extension reaction using hexamethylene diisocyanate. Two series of copolymers with different length of PCL block and varying ratio of PCL and PBS block through each series were synthesized. PCL-b-PBS copolymers were characterized by NMR, FTIR, WAXS, DSC, TG and DMA in solid state. Special attention was given to the investigation of the influence of composition and structure of multiblock copolymers on their biodegradability properties. Biodegradability of these multiblock copolymers was assessed through hydrolysis in alkaline medium and soil burial test. Each block in multiblock copolymers crystallized separately, with adverse influence of its presence on degree of crystallinity and, in much lesser extent, on melting temperature of the second phase. Multiblock copolymers showed high thermal stability, comparable to corresponding homopolymers. Mechanical strength, deduced from storage modulus in glassy and rubbery state, was a firm function of composition. Copolymers rich in PBS were more prone to degradation through simple hydrolysis in alkaline medium, while PCL-rich copolymers were more susceptible to degradation by soil microorganisms. Through the change in copolymer composition, degradability in different environments could be tailored without compromising materials’ thermal properties. Besides composition, molecular weight of copolymers had the major influence on degradability properties.",
publisher = "Springer",
journal = "Journal of Polymer Research",
title = "Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability",
volume = "29",
number = "7",
doi = "10.1007/s10965-022-03144-w"
}
Ponjavić, M., Jevtić, S.,& Nikolić, M. S.. (2022). Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability. in Journal of Polymer Research
Springer., 29(7).
https://doi.org/10.1007/s10965-022-03144-w
Ponjavić M, Jevtić S, Nikolić MS. Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability. in Journal of Polymer Research. 2022;29(7).
doi:10.1007/s10965-022-03144-w .
Ponjavić, Marijana, Jevtić, Sanja, Nikolić, Marija S., "Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability" in Journal of Polymer Research, 29, no. 7 (2022),
https://doi.org/10.1007/s10965-022-03144-w . .
1
1

Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support

Ponjavić, Marijana; Stevanović, Sanja; Jeremić, Sanja; Nikodinović-Runić, Jasmina; Ćosović, Vladan; Maksimović, Vesna

(Banja Luka : University in Banjaluka, Faculty of Technology, 2022)

TY  - CONF
AU  - Ponjavić, Marijana
AU  - Stevanović, Sanja
AU  - Jeremić, Sanja
AU  - Nikodinović-Runić, Jasmina
AU  - Ćosović, Vladan
AU  - Maksimović, Vesna
PY  - 2022
UR  - https://savjetovanje.tf.unibl.org/home/digital-library/book-of-abstracts/
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5939
AB  - The main objective of this work was to prepare new platinum supported catalyst on BNC/PVA composite as nanoparticles carrier, designed for electrocatalytic applications. For that purpose, BNC/Pt suspension was mixed with 1 wt% PVA solution and BNC/PVA/Pt catalyst in the form of film was successfully synthesized. The structure and thermal properties of catalyst were characterized by ATR-FTIR and TG analysis, respectively, while its crystallinity was investigated 
by XRD analysis. Electrocatalytic potential of BNC/PVA/Pt catalyst was tested in methanol 
oxidation reaction. Remarkable catalytic activity of new Pt based catalyst was confirmed. The 
obtained results for catalyst activity was comparable to those obtained for preferentially used 
carbon based Pt supports pointing that BNC based composited can be considered as great 
substitution of carbon based materials with the green one.
PB  - Banja Luka : University in Banjaluka, Faculty of Technology
C3  - Book of abstracts – XIV International scientific conference of chemists, technologists and environmentalists of Republic of Srpska, October 21-22, 2022, Banja Luka
T1  - Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support
SP  - 33
EP  - 33
UR  - https://hdl.handle.net/21.15107/rcub_cer_5939
ER  - 
@conference{
author = "Ponjavić, Marijana and Stevanović, Sanja and Jeremić, Sanja and Nikodinović-Runić, Jasmina and Ćosović, Vladan and Maksimović, Vesna",
year = "2022",
abstract = "The main objective of this work was to prepare new platinum supported catalyst on BNC/PVA composite as nanoparticles carrier, designed for electrocatalytic applications. For that purpose, BNC/Pt suspension was mixed with 1 wt% PVA solution and BNC/PVA/Pt catalyst in the form of film was successfully synthesized. The structure and thermal properties of catalyst were characterized by ATR-FTIR and TG analysis, respectively, while its crystallinity was investigated 
by XRD analysis. Electrocatalytic potential of BNC/PVA/Pt catalyst was tested in methanol 
oxidation reaction. Remarkable catalytic activity of new Pt based catalyst was confirmed. The 
obtained results for catalyst activity was comparable to those obtained for preferentially used 
carbon based Pt supports pointing that BNC based composited can be considered as great 
substitution of carbon based materials with the green one.",
publisher = "Banja Luka : University in Banjaluka, Faculty of Technology",
journal = "Book of abstracts – XIV International scientific conference of chemists, technologists and environmentalists of Republic of Srpska, October 21-22, 2022, Banja Luka",
title = "Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support",
pages = "33-33",
url = "https://hdl.handle.net/21.15107/rcub_cer_5939"
}
Ponjavić, M., Stevanović, S., Jeremić, S., Nikodinović-Runić, J., Ćosović, V.,& Maksimović, V.. (2022). Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support. in Book of abstracts – XIV International scientific conference of chemists, technologists and environmentalists of Republic of Srpska, October 21-22, 2022, Banja Luka
Banja Luka : University in Banjaluka, Faculty of Technology., 33-33.
https://hdl.handle.net/21.15107/rcub_cer_5939
Ponjavić M, Stevanović S, Jeremić S, Nikodinović-Runić J, Ćosović V, Maksimović V. Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support. in Book of abstracts – XIV International scientific conference of chemists, technologists and environmentalists of Republic of Srpska, October 21-22, 2022, Banja Luka. 2022;:33-33.
https://hdl.handle.net/21.15107/rcub_cer_5939 .
Ponjavić, Marijana, Stevanović, Sanja, Jeremić, Sanja, Nikodinović-Runić, Jasmina, Ćosović, Vladan, Maksimović, Vesna, "Electrochemical potential of poly(viniyl acohol) modified bacterial nanocellulose as platinum nanoparticles support" in Book of abstracts – XIV International scientific conference of chemists, technologists and environmentalists of Republic of Srpska, October 21-22, 2022, Banja Luka (2022):33-33,
https://hdl.handle.net/21.15107/rcub_cer_5939 .

Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer

Pantelić, Brana; Ponjavić, Marijana; Janković, Vukašin; Aleksić, Ivana; Stevanović, Sanja; Murray, James; Fournet, Margaret Brennan; Nikodinović-Runić, Jasmina

(MDPI, 2021)

TY  - JOUR
AU  - Pantelić, Brana
AU  - Ponjavić, Marijana
AU  - Janković, Vukašin
AU  - Aleksić, Ivana
AU  - Stevanović, Sanja
AU  - Murray, James
AU  - Fournet, Margaret Brennan
AU  - Nikodinović-Runić, Jasmina
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4870
AB  - Meeting the challenge of circularity for plastics requires amenability to repurposing post-use, as equivalent or upcycled products. In a compelling advancement, complete circularity for a biodegradable polyvinyl alcohol/thermoplastic starch (PVA/TPS) food packaging film was demonstrated by bioconversion to high-market-value biopigments and polyhydroxybutyrate (PHB) polyesters. The PVA/TPS film mechanical properties (tensile strength (σu), 22.2 ± 4.3 MPa; strain at break (εu), 325 ± 73%; and Young’s modulus (E), 53–250 MPa) compared closely with low-density polyethylene (LDPE) grades used for food packaging. Strong solubility of the PVA/TPS film in water was a pertinent feature, facilitating suitability as a carbon source for bioprocessing and microbial degradation. Biodegradability of the film with greater than 50% weight loss occurred within 30 days of incubation at 37◦C in a model compost. Up to 22% of the PVA/TPS film substrate conversion to biomass was achieved using three bacterial strains, Ralstonia eutropha H16 (Cupriavidus necator ATCC 17699), Streptomyces sp. JS520, and Bacillus subtilis ATCC6633. For the first time, production of the valuable biopigment (undecylprodigiosin) by Streptomyces sp. JS520 of 5.3 mg/mL and the production of PHB biopolymer at 7.8% of cell dry weight by Ralstonia eutropha H16 from this substrate were reported. This low-energy, low-carbon post-use PVA/TPS film upcycling model approach to plastic circularity demonstrates marked progress in the quest for sustainable and circular plastic solutions.
PB  - MDPI
T2  - Polymers
T1  - Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer
VL  - 13
IS  - 21
SP  - 3692
DO  - 10.3390/polym13213692
ER  - 
@article{
author = "Pantelić, Brana and Ponjavić, Marijana and Janković, Vukašin and Aleksić, Ivana and Stevanović, Sanja and Murray, James and Fournet, Margaret Brennan and Nikodinović-Runić, Jasmina",
year = "2021",
abstract = "Meeting the challenge of circularity for plastics requires amenability to repurposing post-use, as equivalent or upcycled products. In a compelling advancement, complete circularity for a biodegradable polyvinyl alcohol/thermoplastic starch (PVA/TPS) food packaging film was demonstrated by bioconversion to high-market-value biopigments and polyhydroxybutyrate (PHB) polyesters. The PVA/TPS film mechanical properties (tensile strength (σu), 22.2 ± 4.3 MPa; strain at break (εu), 325 ± 73%; and Young’s modulus (E), 53–250 MPa) compared closely with low-density polyethylene (LDPE) grades used for food packaging. Strong solubility of the PVA/TPS film in water was a pertinent feature, facilitating suitability as a carbon source for bioprocessing and microbial degradation. Biodegradability of the film with greater than 50% weight loss occurred within 30 days of incubation at 37◦C in a model compost. Up to 22% of the PVA/TPS film substrate conversion to biomass was achieved using three bacterial strains, Ralstonia eutropha H16 (Cupriavidus necator ATCC 17699), Streptomyces sp. JS520, and Bacillus subtilis ATCC6633. For the first time, production of the valuable biopigment (undecylprodigiosin) by Streptomyces sp. JS520 of 5.3 mg/mL and the production of PHB biopolymer at 7.8% of cell dry weight by Ralstonia eutropha H16 from this substrate were reported. This low-energy, low-carbon post-use PVA/TPS film upcycling model approach to plastic circularity demonstrates marked progress in the quest for sustainable and circular plastic solutions.",
publisher = "MDPI",
journal = "Polymers",
title = "Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer",
volume = "13",
number = "21",
pages = "3692",
doi = "10.3390/polym13213692"
}
Pantelić, B., Ponjavić, M., Janković, V., Aleksić, I., Stevanović, S., Murray, J., Fournet, M. B.,& Nikodinović-Runić, J.. (2021). Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer. in Polymers
MDPI., 13(21), 3692.
https://doi.org/10.3390/polym13213692
Pantelić B, Ponjavić M, Janković V, Aleksić I, Stevanović S, Murray J, Fournet MB, Nikodinović-Runić J. Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer. in Polymers. 2021;13(21):3692.
doi:10.3390/polym13213692 .
Pantelić, Brana, Ponjavić, Marijana, Janković, Vukašin, Aleksić, Ivana, Stevanović, Sanja, Murray, James, Fournet, Margaret Brennan, Nikodinović-Runić, Jasmina, "Upcycling biodegradable pva/starch film to a bacterial biopigment and biopolymer" in Polymers, 13, no. 21 (2021):3692,
https://doi.org/10.3390/polym13213692 . .
2
11
10

Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction

Stevanović, Sanja; Ponjavić, Marijana; Nikodinović-Runić, Jasmina; Maksimović, Vesna; Ćosović, Vladan

(Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM), 2021)

TY  - CONF
AU  - Stevanović, Sanja
AU  - Ponjavić, Marijana
AU  - Nikodinović-Runić, Jasmina
AU  - Maksimović, Vesna
AU  - Ćosović, Vladan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4876
AB  - Catalysts support is essential for nanostructured noble metal catalysts activity and stability since that interaction between the metal particle and the support can affect metal particle size and dispersion. Over the last few decades, the most popular catalysts supports are carbon based materials: Vulcan XC-72 carbon black (CB), multi-walled carbon nanotubes (MWCNTs) and graphene. However, their cost-effective production remains a challenge since most of these materials are obtained by pyrolysis of coal or petroleum. Not less negligible is their negative impact on the environment during synthesis because these processes include release of carbon dioxide and other harmful organic products into the atmosphere. Applications of bacterial nanocelluloses as a catalyst support has attracted a great attention since it can be easily synthesized and is an inexpensive, biodegradable, sustainable and green material. Bacterial nanocellulose (BNC) was produced utilizing the Komagataeibacter medellinensis ID13488 strain. Stable Pt nanoparticles supported on BNC (Pt/BNC) have been synthetized from a precursor solution of H2PtCl6 by microwave assisted polyol procedure. Catalytic activity was tested for methanol oxidation reaction in sulfuric acid solution. The Fourier transform infrared spectroscopy was used to confirm the structure of bacterial nanocellulose as well as after synthesis of Pt-BNC catalyst. Coupled differential scanning calorimetry (DSC) / thermogravimetric (TG) analysis revealed no loss of platinum during synthesis process. XRD analysis showed characteristic peaks for fcc crystalline structure of Pt/BNC and particle size of 1,7 nm. The activity of the Pt/BNC, catalyst for methanol oxidation was evaluated from potentiodynamic measurements in 0.5 M H2SO4 + 0.5 M CH3OH solution. The results obtained indicate enhanced catalytic activities for methanol oxidation reaction.
AB  - Podloge katalizatora imaju veoma važnu ulogu tokom sinteze katalizatora sa plemenitim metalima obzirom da od njihove interakcije sa metalom zavisi veličina čestica i njihova disperzija tokom procesa sinteze. Tokom poslednjih nekoliko decenija kao najčešće korišćene podloge za platinske katalizatore su korišćene podloge na bazi uglljenika: ugalj razvijene površine (Vulcan XC), ugljenične nanotube ili grafen. Međutim, proces dobijanja ovih materijala ima visoke cene zbog toga što se za njihovo dobijanje koriste procesi pirolize uglja ili nafte. Ništa manje zanemarljiv je i negativan uticaj ovih procesa na okolinu pošto procesi sinteze uključuju oslobađanje ugljen dioksida i drugih štetnih materija u atmosferu. Primena bakterijskih nanoceluloza kao nosača katalizatora privukla je veliku pažnju jer se mogu lako sintetizovati i predstavljaju jeftin, biorazgradiv, održiv i zeleni materijal. Bakterijska nanoceluloza (BNC) proizvedena je upotrebom soja Komagataeibacter medellinensis ID13488. Stabilne Pt nanočestice suspendovane na BNC (Pt/BNC) sintetizovane su iz prekursorskog H2PtCl6 rastvora poliol postupkom uz pomoć mikrotalasne pećnice. Ispitivana je katalitička aktivnost reakcije oksidacije metanola u rastvoru sumporne kiseline. Infracrvena spektroskopija Fourierove transformacije je korišćena za potvrdu strukture same bakterijske nanoceluloze, kao i nakon sinteze Pt-BNC katalizatora. Diferencijalna skenirajuća kalorimetrija (DSC) / termogravimetrijska (TG) analiza nije otkrila gubitak platine tokom procesa sinteze. XRD analiza pokazala je karakteristične vrhove za fcc kristalnu strukturu Pt/BNC i veličinu čestica od 1,7 nm. Aktivnost Pt/BNC, katalizatora za oksidaciju metanola, procenjena je iz potenciodinamičkih merenja u 0,5 M H2SO4 + 0,5 M CH3OH rastvoru. Dobijeni rezultati ukazuju na pojačanu katalitičku aktivnost reakcije oksidacije metanola.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction
T1  - Bakterijska celuloza kao podloga za platinske kataliztore za reakciju elektrooksidacije metanola
SP  - 49
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_cer_4876
ER  - 
@conference{
author = "Stevanović, Sanja and Ponjavić, Marijana and Nikodinović-Runić, Jasmina and Maksimović, Vesna and Ćosović, Vladan",
year = "2021",
abstract = "Catalysts support is essential for nanostructured noble metal catalysts activity and stability since that interaction between the metal particle and the support can affect metal particle size and dispersion. Over the last few decades, the most popular catalysts supports are carbon based materials: Vulcan XC-72 carbon black (CB), multi-walled carbon nanotubes (MWCNTs) and graphene. However, their cost-effective production remains a challenge since most of these materials are obtained by pyrolysis of coal or petroleum. Not less negligible is their negative impact on the environment during synthesis because these processes include release of carbon dioxide and other harmful organic products into the atmosphere. Applications of bacterial nanocelluloses as a catalyst support has attracted a great attention since it can be easily synthesized and is an inexpensive, biodegradable, sustainable and green material. Bacterial nanocellulose (BNC) was produced utilizing the Komagataeibacter medellinensis ID13488 strain. Stable Pt nanoparticles supported on BNC (Pt/BNC) have been synthetized from a precursor solution of H2PtCl6 by microwave assisted polyol procedure. Catalytic activity was tested for methanol oxidation reaction in sulfuric acid solution. The Fourier transform infrared spectroscopy was used to confirm the structure of bacterial nanocellulose as well as after synthesis of Pt-BNC catalyst. Coupled differential scanning calorimetry (DSC) / thermogravimetric (TG) analysis revealed no loss of platinum during synthesis process. XRD analysis showed characteristic peaks for fcc crystalline structure of Pt/BNC and particle size of 1,7 nm. The activity of the Pt/BNC, catalyst for methanol oxidation was evaluated from potentiodynamic measurements in 0.5 M H2SO4 + 0.5 M CH3OH solution. The results obtained indicate enhanced catalytic activities for methanol oxidation reaction., Podloge katalizatora imaju veoma važnu ulogu tokom sinteze katalizatora sa plemenitim metalima obzirom da od njihove interakcije sa metalom zavisi veličina čestica i njihova disperzija tokom procesa sinteze. Tokom poslednjih nekoliko decenija kao najčešće korišćene podloge za platinske katalizatore su korišćene podloge na bazi uglljenika: ugalj razvijene površine (Vulcan XC), ugljenične nanotube ili grafen. Međutim, proces dobijanja ovih materijala ima visoke cene zbog toga što se za njihovo dobijanje koriste procesi pirolize uglja ili nafte. Ništa manje zanemarljiv je i negativan uticaj ovih procesa na okolinu pošto procesi sinteze uključuju oslobađanje ugljen dioksida i drugih štetnih materija u atmosferu. Primena bakterijskih nanoceluloza kao nosača katalizatora privukla je veliku pažnju jer se mogu lako sintetizovati i predstavljaju jeftin, biorazgradiv, održiv i zeleni materijal. Bakterijska nanoceluloza (BNC) proizvedena je upotrebom soja Komagataeibacter medellinensis ID13488. Stabilne Pt nanočestice suspendovane na BNC (Pt/BNC) sintetizovane su iz prekursorskog H2PtCl6 rastvora poliol postupkom uz pomoć mikrotalasne pećnice. Ispitivana je katalitička aktivnost reakcije oksidacije metanola u rastvoru sumporne kiseline. Infracrvena spektroskopija Fourierove transformacije je korišćena za potvrdu strukture same bakterijske nanoceluloze, kao i nakon sinteze Pt-BNC katalizatora. Diferencijalna skenirajuća kalorimetrija (DSC) / termogravimetrijska (TG) analiza nije otkrila gubitak platine tokom procesa sinteze. XRD analiza pokazala je karakteristične vrhove za fcc kristalnu strukturu Pt/BNC i veličinu čestica od 1,7 nm. Aktivnost Pt/BNC, katalizatora za oksidaciju metanola, procenjena je iz potenciodinamičkih merenja u 0,5 M H2SO4 + 0,5 M CH3OH rastvoru. Dobijeni rezultati ukazuju na pojačanu katalitičku aktivnost reakcije oksidacije metanola.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction, Bakterijska celuloza kao podloga za platinske kataliztore za reakciju elektrooksidacije metanola",
pages = "49-50",
url = "https://hdl.handle.net/21.15107/rcub_cer_4876"
}
Stevanović, S., Ponjavić, M., Nikodinović-Runić, J., Maksimović, V.,& Ćosović, V.. (2021). Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)., 49-50.
https://hdl.handle.net/21.15107/rcub_cer_4876
Stevanović S, Ponjavić M, Nikodinović-Runić J, Maksimović V, Ćosović V. Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:49-50.
https://hdl.handle.net/21.15107/rcub_cer_4876 .
Stevanović, Sanja, Ponjavić, Marijana, Nikodinović-Runić, Jasmina, Maksimović, Vesna, Ćosović, Vladan, "Bacterial nanocellulose as green support for platinum catalysts in methanol electrooxidation reaction" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):49-50,
https://hdl.handle.net/21.15107/rcub_cer_4876 .

Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects

Ponjavić, Marijana; Nikolić, Marija S.; Stevanović, Sanja; Nikodinović-Runić, Jasmina; Jeremić, Sanja; Pavić, Aleksandar; Đongalić, Jasna

(SAGE Publications, 2020)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Stevanović, Sanja
AU  - Nikodinović-Runić, Jasmina
AU  - Jeremić, Sanja
AU  - Pavić, Aleksandar
AU  - Đongalić, Jasna
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4019
AB  - Star-shaped polymers of biodegradable aliphatic polyester, poly(ε-caprolactone), PCL, with different number of arms (three, four, and six) were synthesized by ring-opening polymerization initiated by multifunctional alcohols used as cores. As potential biomaterials, synthesized star-shaped poly(ε-caprolactone)s, sPCL, were thoroughly characterized in terms of their degradation under different pH conditions and in respect to their cytotoxicity. The in vitro degradation was performed in phosphate buffer (pH 7.4) and hydrochloric acid solution (pH 1.0) over 5 weeks. Degradation of sPCL films was followed by the weight loss measurements, GPC, FTIR, and AFM analysis. While the most of the samples were stable against the abiotic hydrolysis at pH 7.4 after 5 weeks of degradation, degradation was significantly accelerated in the acidic medium. Degradation rate of polymer films was affected by the polymer architecture and molecular weight. The molecular weight profiles during the degradation revealed random chain scission of the ester bonds indicating bulk degradation mechanism of hydrolysis at pH 7.4, while acidic hydrolysis proceeded through the bulk degradation associated with surface erosion, confirmed by AFM. The in vitro toxicity tests, cytotoxicity applying normal human fibroblasts (MRC5) and embryotoxicity assessment (using zebra fish model, Danio rerio), suggested those polymeric materials as suitable for biomedical application.
PB  - SAGE Publications
T2  - Journal of Bioactive and Compatible Polymers
T1  - Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects
VL  - 35
IS  - 6
SP  - 517
EP  - 537
DO  - 10.1177/0883911520951826
ER  - 
@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Stevanović, Sanja and Nikodinović-Runić, Jasmina and Jeremić, Sanja and Pavić, Aleksandar and Đongalić, Jasna",
year = "2020",
abstract = "Star-shaped polymers of biodegradable aliphatic polyester, poly(ε-caprolactone), PCL, with different number of arms (three, four, and six) were synthesized by ring-opening polymerization initiated by multifunctional alcohols used as cores. As potential biomaterials, synthesized star-shaped poly(ε-caprolactone)s, sPCL, were thoroughly characterized in terms of their degradation under different pH conditions and in respect to their cytotoxicity. The in vitro degradation was performed in phosphate buffer (pH 7.4) and hydrochloric acid solution (pH 1.0) over 5 weeks. Degradation of sPCL films was followed by the weight loss measurements, GPC, FTIR, and AFM analysis. While the most of the samples were stable against the abiotic hydrolysis at pH 7.4 after 5 weeks of degradation, degradation was significantly accelerated in the acidic medium. Degradation rate of polymer films was affected by the polymer architecture and molecular weight. The molecular weight profiles during the degradation revealed random chain scission of the ester bonds indicating bulk degradation mechanism of hydrolysis at pH 7.4, while acidic hydrolysis proceeded through the bulk degradation associated with surface erosion, confirmed by AFM. The in vitro toxicity tests, cytotoxicity applying normal human fibroblasts (MRC5) and embryotoxicity assessment (using zebra fish model, Danio rerio), suggested those polymeric materials as suitable for biomedical application.",
publisher = "SAGE Publications",
journal = "Journal of Bioactive and Compatible Polymers",
title = "Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects",
volume = "35",
number = "6",
pages = "517-537",
doi = "10.1177/0883911520951826"
}
Ponjavić, M., Nikolić, M. S., Stevanović, S., Nikodinović-Runić, J., Jeremić, S., Pavić, A.,& Đongalić, J.. (2020). Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects. in Journal of Bioactive and Compatible Polymers
SAGE Publications., 35(6), 517-537.
https://doi.org/10.1177/0883911520951826
Ponjavić M, Nikolić MS, Stevanović S, Nikodinović-Runić J, Jeremić S, Pavić A, Đongalić J. Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects. in Journal of Bioactive and Compatible Polymers. 2020;35(6):517-537.
doi:10.1177/0883911520951826 .
Ponjavić, Marijana, Nikolić, Marija S., Stevanović, Sanja, Nikodinović-Runić, Jasmina, Jeremić, Sanja, Pavić, Aleksandar, Đongalić, Jasna, "Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects" in Journal of Bioactive and Compatible Polymers, 35, no. 6 (2020):517-537,
https://doi.org/10.1177/0883911520951826 . .
6
1
5

Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil

Mandić, Mina; Spasić, Jelena; Ponjavić, Marijana; Nikolić, Marija S.; Ćosović, Vladan; O'Connor, Kevin E.; Nikodinović-Runić, Jasmina; Đokić, Lidija; Jeremić, Sanja

(Elsevier, 2019)

TY  - JOUR
AU  - Mandić, Mina
AU  - Spasić, Jelena
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Ćosović, Vladan
AU  - O'Connor, Kevin E.
AU  - Nikodinović-Runić, Jasmina
AU  - Đokić, Lidija
AU  - Jeremić, Sanja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2955
AB  - Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.
PB  - Elsevier
T2  - Polymer Degradation and Stability
T1  - Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil
VL  - 162
SP  - 160
EP  - 168
DO  - 10.1016/j.polymdegradstab.2019.02.012
ER  - 
@article{
author = "Mandić, Mina and Spasić, Jelena and Ponjavić, Marijana and Nikolić, Marija S. and Ćosović, Vladan and O'Connor, Kevin E. and Nikodinović-Runić, Jasmina and Đokić, Lidija and Jeremić, Sanja",
year = "2019",
abstract = "Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.",
publisher = "Elsevier",
journal = "Polymer Degradation and Stability",
title = "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil",
volume = "162",
pages = "160-168",
doi = "10.1016/j.polymdegradstab.2019.02.012"
}
Mandić, M., Spasić, J., Ponjavić, M., Nikolić, M. S., Ćosović, V., O'Connor, K. E., Nikodinović-Runić, J., Đokić, L.,& Jeremić, S.. (2019). Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability
Elsevier., 162, 160-168.
https://doi.org/10.1016/j.polymdegradstab.2019.02.012
Mandić M, Spasić J, Ponjavić M, Nikolić MS, Ćosović V, O'Connor KE, Nikodinović-Runić J, Đokić L, Jeremić S. Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability. 2019;162:160-168.
doi:10.1016/j.polymdegradstab.2019.02.012 .
Mandić, Mina, Spasić, Jelena, Ponjavić, Marijana, Nikolić, Marija S., Ćosović, Vladan, O'Connor, Kevin E., Nikodinović-Runić, Jasmina, Đokić, Lidija, Jeremić, Sanja, "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil" in Polymer Degradation and Stability, 162 (2019):160-168,
https://doi.org/10.1016/j.polymdegradstab.2019.02.012 . .
20
6
20

Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil

Mandić, Mina; Spasić, Jelena; Ponjavić, Marijana; Nikolić, Marija S.; Ćosović, Vladan; O'Connor, Kevin E.; Nikodinović-Runić, Jasmina; Đokić, Lidija; Jeremić, Sanja

(Elsevier, 2019)

TY  - JOUR
AU  - Mandić, Mina
AU  - Spasić, Jelena
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Ćosović, Vladan
AU  - O'Connor, Kevin E.
AU  - Nikodinović-Runić, Jasmina
AU  - Đokić, Lidija
AU  - Jeremić, Sanja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2956
AB  - Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.
PB  - Elsevier
T2  - Polymer Degradation and Stability
T1  - Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil
VL  - 162
SP  - 160
EP  - 168
DO  - 10.1016/j.polymdegradstab.2019.02.012
ER  - 
@article{
author = "Mandić, Mina and Spasić, Jelena and Ponjavić, Marijana and Nikolić, Marija S. and Ćosović, Vladan and O'Connor, Kevin E. and Nikodinović-Runić, Jasmina and Đokić, Lidija and Jeremić, Sanja",
year = "2019",
abstract = "Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.",
publisher = "Elsevier",
journal = "Polymer Degradation and Stability",
title = "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil",
volume = "162",
pages = "160-168",
doi = "10.1016/j.polymdegradstab.2019.02.012"
}
Mandić, M., Spasić, J., Ponjavić, M., Nikolić, M. S., Ćosović, V., O'Connor, K. E., Nikodinović-Runić, J., Đokić, L.,& Jeremić, S.. (2019). Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability
Elsevier., 162, 160-168.
https://doi.org/10.1016/j.polymdegradstab.2019.02.012
Mandić M, Spasić J, Ponjavić M, Nikolić MS, Ćosović V, O'Connor KE, Nikodinović-Runić J, Đokić L, Jeremić S. Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability. 2019;162:160-168.
doi:10.1016/j.polymdegradstab.2019.02.012 .
Mandić, Mina, Spasić, Jelena, Ponjavić, Marijana, Nikolić, Marija S., Ćosović, Vladan, O'Connor, Kevin E., Nikodinović-Runić, Jasmina, Đokić, Lidija, Jeremić, Sanja, "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil" in Polymer Degradation and Stability, 162 (2019):160-168,
https://doi.org/10.1016/j.polymdegradstab.2019.02.012 . .
20
6
20

Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers

Ponjavić, Marijana; Nikolić, Marija S.; Jeremić, Sanja; Đokić, Lidija; Nikodinović-Runić, Jasmina; Ćosović, Vladan; Đonlagić, Jasna

(Springer, 2018)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Jeremić, Sanja
AU  - Đokić, Lidija
AU  - Nikodinović-Runić, Jasmina
AU  - Ćosović, Vladan
AU  - Đonlagić, Jasna
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2311
AB  - Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( LT  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.
PB  - Springer
T2  - Journal of Polymers and the Environment
T1  - Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers
VL  - 26
IS  - 6
SP  - 2346
EP  - 2359
DO  - 10.1007/s10924-017-1130-2
ER  - 
@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Jeremić, Sanja and Đokić, Lidija and Nikodinović-Runić, Jasmina and Ćosović, Vladan and Đonlagić, Jasna",
year = "2018",
abstract = "Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( LT  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.",
publisher = "Springer",
journal = "Journal of Polymers and the Environment",
title = "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers",
volume = "26",
number = "6",
pages = "2346-2359",
doi = "10.1007/s10924-017-1130-2"
}
Ponjavić, M., Nikolić, M. S., Jeremić, S., Đokić, L., Nikodinović-Runić, J., Ćosović, V.,& Đonlagić, J.. (2018). Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment
Springer., 26(6), 2346-2359.
https://doi.org/10.1007/s10924-017-1130-2
Ponjavić M, Nikolić MS, Jeremić S, Đokić L, Nikodinović-Runić J, Ćosović V, Đonlagić J. Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment. 2018;26(6):2346-2359.
doi:10.1007/s10924-017-1130-2 .
Ponjavić, Marijana, Nikolić, Marija S., Jeremić, Sanja, Đokić, Lidija, Nikodinović-Runić, Jasmina, Ćosović, Vladan, Đonlagić, Jasna, "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers" in Journal of Polymers and the Environment, 26, no. 6 (2018):2346-2359,
https://doi.org/10.1007/s10924-017-1130-2 . .
9
4
8

Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions

Ponjavić, Marijana; Nikolić, Marija S.; Nikodinović-Runić, Jasmina; Jeremić, Sanja; Stevanović, Sanja; Đonlagić, Jasna

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Nikodinović-Runić, Jasmina
AU  - Jeremić, Sanja
AU  - Stevanović, Sanja
AU  - Đonlagić, Jasna
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2200
AB  - Short-term hydrolytic and enzymatic degradation of poly(epsilon-caprolactone) (PCL), one series of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers, with a low content of hydrophilic PEO segments is presented. The effect of the introduction of PEO as the central or lateral segment in the PCL chain on copolymer hydrolysis and biodegradation properties was investigated. FUR results revealed higher hydrolytic degradation susceptibility of diblock copolymers due to a higher hydrophilicity compared to PCL and triblock copolymers. Enzymatic degradation was tested using cell-free extracts of Pseudomonas aeruginosa PAO1, for two weeks by following the weight loss, changes in surface roughness, and changes in carbonyl and crystallinity index. The results confirmed that all samples underwent enzymatic degradation through surface erosion which was accompanied with a decrease in molecular weights. Diblock copolymers showed significantly higher weight loss and decrease in molecular weight in comparison to PCL itself and triblock copolymers. AFM analysis confirmed significant surface erosion and increase in RMS values. In addition, biodegradation of polymer films was tested in compost model system at 37 degrees C, where an effective degradation of block copolymers was observed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Testing
T1  - Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions
VL  - 57
SP  - 67
EP  - 77
DO  - 10.1016/j.polymertesting.2016.11.018
ER  - 
@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Nikodinović-Runić, Jasmina and Jeremić, Sanja and Stevanović, Sanja and Đonlagić, Jasna",
year = "2017",
abstract = "Short-term hydrolytic and enzymatic degradation of poly(epsilon-caprolactone) (PCL), one series of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers, with a low content of hydrophilic PEO segments is presented. The effect of the introduction of PEO as the central or lateral segment in the PCL chain on copolymer hydrolysis and biodegradation properties was investigated. FUR results revealed higher hydrolytic degradation susceptibility of diblock copolymers due to a higher hydrophilicity compared to PCL and triblock copolymers. Enzymatic degradation was tested using cell-free extracts of Pseudomonas aeruginosa PAO1, for two weeks by following the weight loss, changes in surface roughness, and changes in carbonyl and crystallinity index. The results confirmed that all samples underwent enzymatic degradation through surface erosion which was accompanied with a decrease in molecular weights. Diblock copolymers showed significantly higher weight loss and decrease in molecular weight in comparison to PCL itself and triblock copolymers. AFM analysis confirmed significant surface erosion and increase in RMS values. In addition, biodegradation of polymer films was tested in compost model system at 37 degrees C, where an effective degradation of block copolymers was observed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Testing",
title = "Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions",
volume = "57",
pages = "67-77",
doi = "10.1016/j.polymertesting.2016.11.018"
}
Ponjavić, M., Nikolić, M. S., Nikodinović-Runić, J., Jeremić, S., Stevanović, S.,& Đonlagić, J.. (2017). Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions. in Polymer Testing
Elsevier Sci Ltd, Oxford., 57, 67-77.
https://doi.org/10.1016/j.polymertesting.2016.11.018
Ponjavić M, Nikolić MS, Nikodinović-Runić J, Jeremić S, Stevanović S, Đonlagić J. Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions. in Polymer Testing. 2017;57:67-77.
doi:10.1016/j.polymertesting.2016.11.018 .
Ponjavić, Marijana, Nikolić, Marija S., Nikodinović-Runić, Jasmina, Jeremić, Sanja, Stevanović, Sanja, Đonlagić, Jasna, "Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions" in Polymer Testing, 57 (2017):67-77,
https://doi.org/10.1016/j.polymertesting.2016.11.018 . .
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Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers

Ponjavić, Marijana; Nikolić, Marija S.; Jevtic, Sanja; Rogan, Jelena R.; Stevanović, Sanja; Đonlagić, Jasna

(Springer, Dordrecht, 2016)

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Jevtic, Sanja
AU  - Rogan, Jelena R.
AU  - Stevanović, Sanja
AU  - Đonlagić, Jasna
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2003
AB  - Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.
PB  - Springer, Dordrecht
T2  - Macromolecular Research
T1  - Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers
VL  - 24
IS  - 4
SP  - 323
EP  - 335
DO  - 10.1007/s13233-016-4048-y
ER  - 
@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Jevtic, Sanja and Rogan, Jelena R. and Stevanović, Sanja and Đonlagić, Jasna",
year = "2016",
abstract = "Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.",
publisher = "Springer, Dordrecht",
journal = "Macromolecular Research",
title = "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers",
volume = "24",
number = "4",
pages = "323-335",
doi = "10.1007/s13233-016-4048-y"
}
Ponjavić, M., Nikolić, M. S., Jevtic, S., Rogan, J. R., Stevanović, S.,& Đonlagić, J.. (2016). Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research
Springer, Dordrecht., 24(4), 323-335.
https://doi.org/10.1007/s13233-016-4048-y
Ponjavić M, Nikolić MS, Jevtic S, Rogan JR, Stevanović S, Đonlagić J. Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research. 2016;24(4):323-335.
doi:10.1007/s13233-016-4048-y .
Ponjavić, Marijana, Nikolić, Marija S., Jevtic, Sanja, Rogan, Jelena R., Stevanović, Sanja, Đonlagić, Jasna, "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers" in Macromolecular Research, 24, no. 4 (2016):323-335,
https://doi.org/10.1007/s13233-016-4048-y . .
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