TY  - JOUR
AU  - Nikolić, Jasmina B.
AU  - Prlainović, Nevena Ž.
AU  - Šekularac, Gavrilo M.
AU  - Matović, Luka R.
AU  - Lazić, Anita M.
AU  - Drmanić, Saša Ž.
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7387
AB  - The esters of substituted 1,4-dihydropyirdines (1,4-DHP) are formed in the reaction of an appropriate aldehyde and ethyl acetoacetate in the presence of concentrated water solution of ammonia. The esters form the amides by the reaction with primary amines. The series of the amides has been synthesized with the aim to analyze their chemical characteristics, antioxidant and antimicrobial activity. The amine used in this research is 2-aminothiazole. The antioxidant activity is analysed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) methods and the antimicrobial activity screening was performed by broth microdilution method, using different microbial strains. The characterization of the obtained amides was done by melting points, FTIR, NMR and elemental analysis. The possibilities for further research was suggested, which could lead to the application of selected compounds.
AB  - Естри супституисаних 1,4-дихидропиридина се формирају у реакцији одговарајућег алдехида и етил-ацетоацетата у присуству амонијум-хидроксида. Наведени естри
прелазе у амиде реакцијом са примарним аминима. Серија оваквих амида је синтетисана са циљем да се испита њихова антиоксидативна и антимиркобна активност, као и
хемијске карактеристике. Амин употребљен за синтезу је 2-аминотиазол. Антиоксидативна активност је анализирана DPPH и ABTS методама, а антимикробна бујон микродилуционом методом. Карактеризација добијених једињења урађена је помоћу тачака
топљења, FTIR, NMR и елементалном анализом. Предложене су могућности за наставак
истраживања, који бу водио њиховој примени одређених испитиваних једињења.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - The synthesis, characterization, antioxidant and antimicrobial activity of some novel amides of the esters of substituted 1,4-dihydropyridines
T1  - Синтеза, карактеризација, антиоксидативна и антимикробна активност некиx нових амида естара 1,4-дихидропиридина
EP  - 150
IS  - 2
SP  - 141
VL  - 89
DO  - 10.2298/JSC231023098N
ER  - 

@article{
author = "Nikolić, Jasmina B. and Prlainović, Nevena Ž. and Šekularac, Gavrilo M. and Matović, Luka R. and Lazić, Anita M. and Drmanić, Saša Ž.",
year = "2024",
abstract = "The esters of substituted 1,4-dihydropyirdines (1,4-DHP) are formed in the reaction of an appropriate aldehyde and ethyl acetoacetate in the presence of concentrated water solution of ammonia. The esters form the amides by the reaction with primary amines. The series of the amides has been synthesized with the aim to analyze their chemical characteristics, antioxidant and antimicrobial activity. The amine used in this research is 2-aminothiazole. The antioxidant activity is analysed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) methods and the antimicrobial activity screening was performed by broth microdilution method, using different microbial strains. The characterization of the obtained amides was done by melting points, FTIR, NMR and elemental analysis. The possibilities for further research was suggested, which could lead to the application of selected compounds., Естри супституисаних 1,4-дихидропиридина се формирају у реакцији одговарајућег алдехида и етил-ацетоацетата у присуству амонијум-хидроксида. Наведени естри
прелазе у амиде реакцијом са примарним аминима. Серија оваквих амида је синтетисана са циљем да се испита њихова антиоксидативна и антимиркобна активност, као и
хемијске карактеристике. Амин употребљен за синтезу је 2-аминотиазол. Антиоксидативна активност је анализирана DPPH и ABTS методама, а антимикробна бујон микродилуционом методом. Карактеризација добијених једињења урађена је помоћу тачака
топљења, FTIR, NMR и елементалном анализом. Предложене су могућности за наставак
истраживања, који бу водио њиховој примени одређених испитиваних једињења.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "The synthesis, characterization, antioxidant and antimicrobial activity of some novel amides of the esters of substituted 1,4-dihydropyridines, Синтеза, карактеризација, антиоксидативна и антимикробна активност некиx нових амида естара 1,4-дихидропиридина",
pages = "150-141",
number = "2",
volume = "89",
doi = "10.2298/JSC231023098N"
}

Nikolić, J. B., Prlainović, N. Ž., Šekularac, G. M., Matović, L. R., Lazić, A. M.,& Drmanić, S. Ž.. (2024). The synthesis, characterization, antioxidant and antimicrobial activity of some novel amides of the esters of substituted 1,4-dihydropyridines. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 89(2), 141-150.
https://doi.org/10.2298/JSC231023098N

Nikolić JB, Prlainović NŽ, Šekularac GM, Matović LR, Lazić AM, Drmanić SŽ. The synthesis, characterization, antioxidant and antimicrobial activity of some novel amides of the esters of substituted 1,4-dihydropyridines. in Journal of the Serbian Chemical Society. 2024;89(2):141-150.
doi:10.2298/JSC231023098N .

Nikolić, Jasmina B., Prlainović, Nevena Ž., Šekularac, Gavrilo M., Matović, Luka R., Lazić, Anita M., Drmanić, Saša Ž., "The synthesis, characterization, antioxidant and antimicrobial activity of some novel amides of the esters of substituted 1,4-dihydropyridines" in Journal of the Serbian Chemical Society, 89, no. 2 (2024):141-150,
https://doi.org/10.2298/JSC231023098N . .

TY  - JOUR
AU  - Popović, Marko
AU  - Šekularac, Gavrilo
AU  - Stevanović, Maja
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6988
AB  - Every microorganism represents a biothermodynamic system, characterized by an empirical formula and thermodynamic properties of biosynthesis. Gibbs energy of biosynthesis influences the multiplication rate of a microorganism. In case of a mixed culture (microbial consortia) biosynthesis processes of microbial species are competitive. This is why Gibbs energy of biosynthesis determines the growth in a mixed culture. This paper gives a mechanistic model that explains growth of microorganisms in mixed culture and ability to grow in microbial consortia. Detailed biosynthesis reactions were formulated for the first time for five microorganism species, which include metallic elements. Moreover, thermodynamic properties of live matter and biosynthesis were calculated for the first time for five microorganism species and macromolecules.
PB  - Elsevier B.V.
T2  - Journal of Biotechnology
T1  - Thermodynamics of microbial consortia: Enthalpies and Gibbs energies of microorganism live matter and macromolecules of E. coli, G. oxydans, P. fluorescens, S. thermophilus and P. chrysogenum
EP  - 17
SP  - 6
VL  - 379
DO  - 10.1016/j.jbiotec.2023.11.001
ER  - 

@article{
author = "Popović, Marko and Šekularac, Gavrilo and Stevanović, Maja",
year = "2024",
abstract = "Every microorganism represents a biothermodynamic system, characterized by an empirical formula and thermodynamic properties of biosynthesis. Gibbs energy of biosynthesis influences the multiplication rate of a microorganism. In case of a mixed culture (microbial consortia) biosynthesis processes of microbial species are competitive. This is why Gibbs energy of biosynthesis determines the growth in a mixed culture. This paper gives a mechanistic model that explains growth of microorganisms in mixed culture and ability to grow in microbial consortia. Detailed biosynthesis reactions were formulated for the first time for five microorganism species, which include metallic elements. Moreover, thermodynamic properties of live matter and biosynthesis were calculated for the first time for five microorganism species and macromolecules.",
publisher = "Elsevier B.V.",
journal = "Journal of Biotechnology",
title = "Thermodynamics of microbial consortia: Enthalpies and Gibbs energies of microorganism live matter and macromolecules of E. coli, G. oxydans, P. fluorescens, S. thermophilus and P. chrysogenum",
pages = "17-6",
volume = "379",
doi = "10.1016/j.jbiotec.2023.11.001"
}

Popović, M., Šekularac, G.,& Stevanović, M.. (2024). Thermodynamics of microbial consortia: Enthalpies and Gibbs energies of microorganism live matter and macromolecules of E. coli, G. oxydans, P. fluorescens, S. thermophilus and P. chrysogenum. in Journal of Biotechnology
Elsevier B.V.., 379, 6-17.
https://doi.org/10.1016/j.jbiotec.2023.11.001

Popović M, Šekularac G, Stevanović M. Thermodynamics of microbial consortia: Enthalpies and Gibbs energies of microorganism live matter and macromolecules of E. coli, G. oxydans, P. fluorescens, S. thermophilus and P. chrysogenum. in Journal of Biotechnology. 2024;379:6-17.
doi:10.1016/j.jbiotec.2023.11.001 .

Popović, Marko, Šekularac, Gavrilo, Stevanović, Maja, "Thermodynamics of microbial consortia: Enthalpies and Gibbs energies of microorganism live matter and macromolecules of E. coli, G. oxydans, P. fluorescens, S. thermophilus and P. chrysogenum" in Journal of Biotechnology, 379 (2024):6-17,
https://doi.org/10.1016/j.jbiotec.2023.11.001 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Živković, Ljiljana S.
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5858
AB  - TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave- assisted polyol process. Physicochemical properties of TiO2 and TiO2- supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X- ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings.The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.
PB  - Croatian Chemical Society
T2  - Croatica Chemica Acta
T1  - TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications
EP  - 258
IS  - 2
SP  - 251
VL  - 90
DO  - 10.5562/cca3175
ER  - 

@article{
author = "Košević, Milica and Šekularac, Gavrilo and Živković, Ljiljana S. and Panić, Vladimir and Nikolic, Branislav",
year = "2017",
abstract = "TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave- assisted polyol process. Physicochemical properties of TiO2 and TiO2- supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X- ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings.The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.",
publisher = "Croatian Chemical Society",
journal = "Croatica Chemica Acta",
title = "TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications",
pages = "258-251",
number = "2",
volume = "90",
doi = "10.5562/cca3175"
}

Košević, M., Šekularac, G., Živković, L. S., Panić, V.,& Nikolic, B.. (2017). TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications. in Croatica Chemica Acta
Croatian Chemical Society., 90(2), 251-258.
https://doi.org/10.5562/cca3175

Košević M, Šekularac G, Živković LS, Panić V, Nikolic B. TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications. in Croatica Chemica Acta. 2017;90(2):251-258.
doi:10.5562/cca3175 .

Košević, Milica, Šekularac, Gavrilo, Živković, Ljiljana S., Panić, Vladimir, Nikolic, Branislav, "TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications" in Croatica Chemica Acta, 90, no. 2 (2017):251-258,
https://doi.org/10.5562/cca3175 . .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Dekanski, Aleksandar
AU  - Đokić, Veljko
AU  - Panjan, Matjaz
AU  - Panić, Vladimir
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3629
AB  - A simple one-step microwave-assisted and temperature-controlled hydrothermal synthesis was applied to prepare a nanocrystalline RuO2 dispersion from an aqueous solution of RuCl3 for supercapacitive applications. The obtained RuO2 dispersions were subjected to dynamic light scattering in order to analyze the particle size distribution, whereas morphology and structural properties of the solid phase were investigated by using AFM, SEM, EDX, TEM, and XRD techniques. Ellipsoidally shaped 100-500 nm-sized compact grains, joined into highly ordered prismatic agglomerates, are observed. Two types of grains are observed: more regular ones consisting of spherical, amorphous particles of a few nanometers in size, and irregular ones made of partially crystalline 10-80 nm-sized particles. Consequently, the most dominant structure is 250-nm grains. The particles tend to join tightly across their crystalline domains, which appears responsible for the formation of prismatic shapes of several micrometers. This arraying causes high capacitive activity - specific capacitances of up to 800 Fg(-1) are registered, which negligibly depend on the charging/discharging rate. The synthesized material is of highly accessible internal structure, and is an excellent candidate for both low- and high-power applications.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Chemelectrochem
T1  - High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis
EP  - 2541
IS  - 10
SP  - 2535
VL  - 4
DO  - 10.1002/celc.201700609
ER  - 

@article{
author = "Šekularac, Gavrilo and Košević, Milica and Dekanski, Aleksandar and Đokić, Veljko and Panjan, Matjaz and Panić, Vladimir",
year = "2017",
abstract = "A simple one-step microwave-assisted and temperature-controlled hydrothermal synthesis was applied to prepare a nanocrystalline RuO2 dispersion from an aqueous solution of RuCl3 for supercapacitive applications. The obtained RuO2 dispersions were subjected to dynamic light scattering in order to analyze the particle size distribution, whereas morphology and structural properties of the solid phase were investigated by using AFM, SEM, EDX, TEM, and XRD techniques. Ellipsoidally shaped 100-500 nm-sized compact grains, joined into highly ordered prismatic agglomerates, are observed. Two types of grains are observed: more regular ones consisting of spherical, amorphous particles of a few nanometers in size, and irregular ones made of partially crystalline 10-80 nm-sized particles. Consequently, the most dominant structure is 250-nm grains. The particles tend to join tightly across their crystalline domains, which appears responsible for the formation of prismatic shapes of several micrometers. This arraying causes high capacitive activity - specific capacitances of up to 800 Fg(-1) are registered, which negligibly depend on the charging/discharging rate. The synthesized material is of highly accessible internal structure, and is an excellent candidate for both low- and high-power applications.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Chemelectrochem",
title = "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis",
pages = "2541-2535",
number = "10",
volume = "4",
doi = "10.1002/celc.201700609"
}

Šekularac, G., Košević, M., Dekanski, A., Đokić, V., Panjan, M.,& Panić, V.. (2017). High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis. in Chemelectrochem
Wiley-VCH Verlag Gmbh, Weinheim., 4(10), 2535-2541.
https://doi.org/10.1002/celc.201700609

Šekularac G, Košević M, Dekanski A, Đokić V, Panjan M, Panić V. High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis. in Chemelectrochem. 2017;4(10):2535-2541.
doi:10.1002/celc.201700609 .

Šekularac, Gavrilo, Košević, Milica, Dekanski, Aleksandar, Đokić, Veljko, Panjan, Matjaz, Panić, Vladimir, "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis" in Chemelectrochem, 4, no. 10 (2017):2535-2541,
https://doi.org/10.1002/celc.201700609 . .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Eraković, Sanja
AU  - Mijin, Dušan
AU  - Pavelkić, Vesna
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3586
AB  - For the preparation of RuO2 coatings on Ti substrate, the RuO2 was synthesized in acidic aqueous medium by simple one-step low temperature-controlled microwave (MW) irradiation. The physical composition of synthesized solid phase was analysed through particle size distribution (PSD), whereas the coating was investigated for its capacitive response and activity in oxygen evolution reaction (OER). The oxide phase was found highly polydisperse, with overlapped fractions within rather narrow particle size range and clear tendency toward agglomeration. The smallest particles and their best resolved fractions were synthesized at the temperature just above the boiling point of the reaction medium, and quite below the chloride-to-oxide conversion temperature. Consequently, the highest OER activity was registered for RuO2/Ti anodes prepared from this sample, with strong indication of different oxide structure, with respect to the electrodes prepared from samples synthesized at higher temperatures. However, the coatings from high temperature samples have considerably higher capacitance than those synthesized at lower temperatures. These findings can be rather correlated to the MW temperature-dependent oxide structure than to different morphology analysed through PSD.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications
EP  - 709
IS  - 6
SP  - 695
VL  - 82
DO  - 10.2298/JSC161229040S
ER  - 

@article{
author = "Šekularac, Gavrilo and Eraković, Sanja and Mijin, Dušan and Pavelkić, Vesna and Stevanović, Jasmina and Panić, Vladimir",
year = "2017",
abstract = "For the preparation of RuO2 coatings on Ti substrate, the RuO2 was synthesized in acidic aqueous medium by simple one-step low temperature-controlled microwave (MW) irradiation. The physical composition of synthesized solid phase was analysed through particle size distribution (PSD), whereas the coating was investigated for its capacitive response and activity in oxygen evolution reaction (OER). The oxide phase was found highly polydisperse, with overlapped fractions within rather narrow particle size range and clear tendency toward agglomeration. The smallest particles and their best resolved fractions were synthesized at the temperature just above the boiling point of the reaction medium, and quite below the chloride-to-oxide conversion temperature. Consequently, the highest OER activity was registered for RuO2/Ti anodes prepared from this sample, with strong indication of different oxide structure, with respect to the electrodes prepared from samples synthesized at higher temperatures. However, the coatings from high temperature samples have considerably higher capacitance than those synthesized at lower temperatures. These findings can be rather correlated to the MW temperature-dependent oxide structure than to different morphology analysed through PSD.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications",
pages = "709-695",
number = "6",
volume = "82",
doi = "10.2298/JSC161229040S"
}

Šekularac, G., Eraković, S., Mijin, D., Pavelkić, V., Stevanović, J.,& Panić, V.. (2017). Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 82(6), 695-709.
https://doi.org/10.2298/JSC161229040S

Šekularac G, Eraković S, Mijin D, Pavelkić V, Stevanović J, Panić V. Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications. in Journal of the Serbian Chemical Society. 2017;82(6):695-709.
doi:10.2298/JSC161229040S .

Šekularac, Gavrilo, Eraković, Sanja, Mijin, Dušan, Pavelkić, Vesna, Stevanović, Jasmina, Panić, Vladimir, "Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications" in Journal of the Serbian Chemical Society, 82, no. 6 (2017):695-709,
https://doi.org/10.2298/JSC161229040S . .

TY  - JOUR
AU  - Petrović, Predrag
AU  - Vunduk, Jovana
AU  - Klaus, Anita
AU  - Kozarski, Maja
AU  - Nikšić, Miomir
AU  - Žižak, Željko
AU  - Vuković, Nebojša
AU  - Šekularac, Gavrilo
AU  - Drmanić, Saša
AU  - Bugarski, Branko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3464
AB  - Handkea utriformis (HU), H. excipuliformis (HE) and Vascellum pratense (VP) mature fruiting bodies methanol extracts were tested for biological activities and active compounds. The extracts showed prominent radical scavenging, reducing, antioxidative and chelating abilities. Scavenging ability was correlated with phenolic (ABTS assay) or phenolic and/or sugar/beta-glucan content (DPPH). Antioxidative and Fe3+-reducing ability of VP extract was the highest, and was best correlated with flavonoid content. The same extract exhibited the best angiotensin-converting enzyme inhibitory activity. HU and HE showed selectivity toward tumor cell lines in cytotoxicity analysis. The extracts exhibited various antimicrobial activity, the best being against Listeria monocytogenes (HE, MIC-0.625 mg/mL); fatty acid content was particularly high in HU (37.25 mg/g), with linoleic acid making up more than 57% in all samples. Phenolics were present in considerable amount, as well as beta-glucans (HU, 16.67%). Although these mushrooms are inedible after autolysis process, they were still a good source of biologically active products.
PB  - Elsevier, Amsterdam
T2  - Journal of Functional Foods
T1  - Biological potential of puffballs: A comparative analysis
EP  - 49
SP  - 36
VL  - 21
DO  - 10.1016/j.jff.2015.11.039
ER  - 

@article{
author = "Petrović, Predrag and Vunduk, Jovana and Klaus, Anita and Kozarski, Maja and Nikšić, Miomir and Žižak, Željko and Vuković, Nebojša and Šekularac, Gavrilo and Drmanić, Saša and Bugarski, Branko",
year = "2016",
abstract = "Handkea utriformis (HU), H. excipuliformis (HE) and Vascellum pratense (VP) mature fruiting bodies methanol extracts were tested for biological activities and active compounds. The extracts showed prominent radical scavenging, reducing, antioxidative and chelating abilities. Scavenging ability was correlated with phenolic (ABTS assay) or phenolic and/or sugar/beta-glucan content (DPPH). Antioxidative and Fe3+-reducing ability of VP extract was the highest, and was best correlated with flavonoid content. The same extract exhibited the best angiotensin-converting enzyme inhibitory activity. HU and HE showed selectivity toward tumor cell lines in cytotoxicity analysis. The extracts exhibited various antimicrobial activity, the best being against Listeria monocytogenes (HE, MIC-0.625 mg/mL); fatty acid content was particularly high in HU (37.25 mg/g), with linoleic acid making up more than 57% in all samples. Phenolics were present in considerable amount, as well as beta-glucans (HU, 16.67%). Although these mushrooms are inedible after autolysis process, they were still a good source of biologically active products.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Functional Foods",
title = "Biological potential of puffballs: A comparative analysis",
pages = "49-36",
volume = "21",
doi = "10.1016/j.jff.2015.11.039"
}

Petrović, P., Vunduk, J., Klaus, A., Kozarski, M., Nikšić, M., Žižak, Ž., Vuković, N., Šekularac, G., Drmanić, S.,& Bugarski, B.. (2016). Biological potential of puffballs: A comparative analysis. in Journal of Functional Foods
Elsevier, Amsterdam., 21, 36-49.
https://doi.org/10.1016/j.jff.2015.11.039

Petrović P, Vunduk J, Klaus A, Kozarski M, Nikšić M, Žižak Ž, Vuković N, Šekularac G, Drmanić S, Bugarski B. Biological potential of puffballs: A comparative analysis. in Journal of Functional Foods. 2016;21:36-49.
doi:10.1016/j.jff.2015.11.039 .

Petrović, Predrag, Vunduk, Jovana, Klaus, Anita, Kozarski, Maja, Nikšić, Miomir, Žižak, Željko, Vuković, Nebojša, Šekularac, Gavrilo, Drmanić, Saša, Bugarski, Branko, "Biological potential of puffballs: A comparative analysis" in Journal of Functional Foods, 21 (2016):36-49,
https://doi.org/10.1016/j.jff.2015.11.039 . .

TY  - CONF
AU  - Šekularac, Gavrilo
AU  - Dekanski, Aleksandar
AU  - Pavelkić, Vesna
AU  - Stevanović, Sanja
AU  - Košević, Milica
AU  - Drmanić, Saša
AU  - Kostić, Ivana
AU  - Panić, Vladimir
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2881
AB  - One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 dispersion was subjected to dynamic light scattering in order to analyze the synthesized particles, whereas structural and morphological properties of the solid phase are investigated by AFM, SEM, EDAX and XRD techniques. The ordered unusual shape of ca. 100-nm native particles, as well as highlyordered prismatic agglomerate sheets are observed. Capacitive properties of RuO2 was investigated by cyclic   voltammetry and electrochemical impedance spectroscopy in 1 M H2SO4 and standard three-electrode cell, with ink-type working electrode on glassy carbon substrate A specific capacitances as high as 750 F/g were obtained, which negligibly depend on sweep rate in 5–500 mV/s range. These findings are quite unusual for this kind of material consisted of rather large particles, and makes it excellent candidate for both low and high power applications. The capacitive response appears stable during prolonged charge/discharge cycling.
PB  - Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria
C3  - 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor
EP  - 93
SP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2881
ER  - 

@conference{
author = "Šekularac, Gavrilo and Dekanski, Aleksandar and Pavelkić, Vesna and Stevanović, Sanja and Košević, Milica and Drmanić, Saša and Kostić, Ivana and Panić, Vladimir",
year = "2015",
abstract = "One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 dispersion was subjected to dynamic light scattering in order to analyze the synthesized particles, whereas structural and morphological properties of the solid phase are investigated by AFM, SEM, EDAX and XRD techniques. The ordered unusual shape of ca. 100-nm native particles, as well as highlyordered prismatic agglomerate sheets are observed. Capacitive properties of RuO2 was investigated by cyclic   voltammetry and electrochemical impedance spectroscopy in 1 M H2SO4 and standard three-electrode cell, with ink-type working electrode on glassy carbon substrate A specific capacitances as high as 750 F/g were obtained, which negligibly depend on sweep rate in 5–500 mV/s range. These findings are quite unusual for this kind of material consisted of rather large particles, and makes it excellent candidate for both low and high power applications. The capacitive response appears stable during prolonged charge/discharge cycling.",
publisher = "Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria",
journal = "5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor",
pages = "93-93",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2881"
}

Šekularac, G., Dekanski, A., Pavelkić, V., Stevanović, S., Košević, M., Drmanić, S., Kostić, I.,& Panić, V.. (2015). Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria., 93-93.
https://hdl.handle.net/21.15107/rcub_technorep_2881

Šekularac G, Dekanski A, Pavelkić V, Stevanović S, Košević M, Drmanić S, Kostić I, Panić V. Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:93-93.
https://hdl.handle.net/21.15107/rcub_technorep_2881 .

Šekularac, Gavrilo, Dekanski, Aleksandar, Pavelkić, Vesna, Stevanović, Sanja, Košević, Milica, Drmanić, Saša, Kostić, Ivana, Panić, Vladimir, "Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):93-93,
https://hdl.handle.net/21.15107/rcub_technorep_2881 .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Nikolić, Jasmina
AU  - Petrović, Predrag
AU  - Bugarski, Branko
AU  - Durović, Boban
AU  - Drmanić, Saša
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2700
AB  - The isatin derivatives, Schiff bases, were synthesized by the reaction of isatin and various substituted primary amines and characterized by several spectroscopic methods. Investigation of the antimicrobial activity of the synthesized compounds was performed by the agar dilution method, against different strains of bacteria and one fungus. The antioxidative activity of the synthesized compounds was also determined. Some of the compounds showed significant activity against the selected strains of microorganisms and antioxidative activity.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives
EP  - 1354
IS  - 11
SP  - 1347
VL  - 79
DO  - 10.2298/JSC140709084S
ER  - 

@article{
author = "Šekularac, Gavrilo and Nikolić, Jasmina and Petrović, Predrag and Bugarski, Branko and Durović, Boban and Drmanić, Saša",
year = "2014",
abstract = "The isatin derivatives, Schiff bases, were synthesized by the reaction of isatin and various substituted primary amines and characterized by several spectroscopic methods. Investigation of the antimicrobial activity of the synthesized compounds was performed by the agar dilution method, against different strains of bacteria and one fungus. The antioxidative activity of the synthesized compounds was also determined. Some of the compounds showed significant activity against the selected strains of microorganisms and antioxidative activity.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives",
pages = "1354-1347",
number = "11",
volume = "79",
doi = "10.2298/JSC140709084S"
}

Šekularac, G., Nikolić, J., Petrović, P., Bugarski, B., Durović, B.,& Drmanić, S.. (2014). Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(11), 1347-1354.
https://doi.org/10.2298/JSC140709084S

Šekularac G, Nikolić J, Petrović P, Bugarski B, Durović B, Drmanić S. Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives. in Journal of the Serbian Chemical Society. 2014;79(11):1347-1354.
doi:10.2298/JSC140709084S .

Šekularac, Gavrilo, Nikolić, Jasmina, Petrović, Predrag, Bugarski, Branko, Durović, Boban, Drmanić, Saša, "Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives" in Journal of the Serbian Chemical Society, 79, no. 11 (2014):1347-1354,
https://doi.org/10.2298/JSC140709084S . .

TY  - JOUR
AU  - Drmanić, Saša
AU  - Nikolić, J.
AU  - Šekularac, Gavrilo
AU  - Ranković, Bojan
AU  - Jovanović, Bratislav Ž.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2586
AB  - Ultraviolet absorption spectra of three isomeric pyridinecarboxylic acids (picolinic, nicotinic, and isonicotinic acids) were measured in 18 various solvents, in the wavelength range from 200 to 400 nm. In order to analyze the solvent effect on the obtained absorption maxima, the ultraviolet absorption frequencies of the electronic transitions in the carbonyl group of the examined acids were correlated using a total solvatochromic equation in the forms nu(max) = nu(0) + s pi(*) + a alpha + b beta and nu(max) = nu(0) + s pi(*) + b beta, where nu(max) is the absorption frequency (1/nu(max)), pi(*) is a measure of the solvent polarity, alpha represents a scale of the solvent hydrogen bond donor acidity, and beta represents a scale of the solvent hydrogen bond acceptor basicity. Correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The effects of two different solvent types on the ultraviolet absorption maxima of the examined acids were compared and discussed.
PB  - Springer, New York
T2  - Journal of Applied Spectroscopy
T1  - Solvent and Structure Effects on Electronic Absorption Spectra of the Isomeric Pyridinecarboxylic Acids
EP  - 834
IS  - 6
SP  - 829
VL  - 80
DO  - 10.1007/s10812-014-9851-7
ER  - 

@article{
author = "Drmanić, Saša and Nikolić, J. and Šekularac, Gavrilo and Ranković, Bojan and Jovanović, Bratislav Ž.",
year = "2014",
abstract = "Ultraviolet absorption spectra of three isomeric pyridinecarboxylic acids (picolinic, nicotinic, and isonicotinic acids) were measured in 18 various solvents, in the wavelength range from 200 to 400 nm. In order to analyze the solvent effect on the obtained absorption maxima, the ultraviolet absorption frequencies of the electronic transitions in the carbonyl group of the examined acids were correlated using a total solvatochromic equation in the forms nu(max) = nu(0) + s pi(*) + a alpha + b beta and nu(max) = nu(0) + s pi(*) + b beta, where nu(max) is the absorption frequency (1/nu(max)), pi(*) is a measure of the solvent polarity, alpha represents a scale of the solvent hydrogen bond donor acidity, and beta represents a scale of the solvent hydrogen bond acceptor basicity. Correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The effects of two different solvent types on the ultraviolet absorption maxima of the examined acids were compared and discussed.",
publisher = "Springer, New York",
journal = "Journal of Applied Spectroscopy",
title = "Solvent and Structure Effects on Electronic Absorption Spectra of the Isomeric Pyridinecarboxylic Acids",
pages = "834-829",
number = "6",
volume = "80",
doi = "10.1007/s10812-014-9851-7"
}

Drmanić, S., Nikolić, J., Šekularac, G., Ranković, B.,& Jovanović, B. Ž.. (2014). Solvent and Structure Effects on Electronic Absorption Spectra of the Isomeric Pyridinecarboxylic Acids. in Journal of Applied Spectroscopy
Springer, New York., 80(6), 829-834.
https://doi.org/10.1007/s10812-014-9851-7

Drmanić S, Nikolić J, Šekularac G, Ranković B, Jovanović BŽ. Solvent and Structure Effects on Electronic Absorption Spectra of the Isomeric Pyridinecarboxylic Acids. in Journal of Applied Spectroscopy. 2014;80(6):829-834.
doi:10.1007/s10812-014-9851-7 .

Drmanić, Saša, Nikolić, J., Šekularac, Gavrilo, Ranković, Bojan, Jovanović, Bratislav Ž., "Solvent and Structure Effects on Electronic Absorption Spectra of the Isomeric Pyridinecarboxylic Acids" in Journal of Applied Spectroscopy, 80, no. 6 (2014):829-834,
https://doi.org/10.1007/s10812-014-9851-7 . .

TY  - JOUR
AU  - Drmanić, Saša
AU  - Nikolić, Jasmina
AU  - Marinković, Aleksandar
AU  - Šekularac, Gavrilo
AU  - Jovanović, Bratislav Ž.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2291
AB  - The ultraviolet absorption spectra of the carboxyl group of three isomeric pyridine carboxylic acids N-oxides (picolinic acid N-oxide, nicotinic acid N-oxide and isonicotinic acid N-oxide) were determined in fourteen solvents in the wavelength range from 200 to 400 nm. The position of the absorption maxima (λmax) of the examined acids showed that the ultraviolet absorption maximum wavelengths of picolinic acid N-oxide are the shortest, and those of isonicotinic acid N-oxide acid are the longest. In order to analyze the solvent effect on the obtained absorption spectra, the ultraviolet absorption frequen­cies of the electronic transitions in the carboxylic group of the examined acids were correlated using a total solvatochromic equation of the form Vmax = V0 + + Sπ*+ aα+ bβ, where Vmax is the absorption frequency (1/λmax), π*is a measure of the solvent polarity, β represents the scale of solvent hydrogen bond acceptor basicities and α represents the scale of solvent hydrogen bond donor acidities. The correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The solvent effects on the ultra­violet absorption maximums of the examined acids were discussed.
AB  - UV apsorpcioni spektri pikolinske kiseline N-oksida, nikotinske kiseline N-oksida i izonikotinske kiseline N-oksida određeni su u 14 protičnih i aprotičnih rastvarača u opsegu od 200-400 nm. Položaji maksimuma apsorpcije bili su najniži za pikolinsku kiseline N-oksid, a najviši za izonikotinsku kiseline N-oksid. Da bi se analizirao uticaj ratvarača, apsorpcione frekvence su korelisane Kamlet-Taftovom jednačinom, kojom se uticaj polarnosti/polarizabilnosti, proton-donorskog i proton-akceptorskog dejstva rastvarača može kvantitativno izraziti.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides
T1  - Uticaj rastvarača i strukture na elektronske absorpcione spektre izomernih piridin-karboksilnih kiselina N-oksida
EP  - 388
IS  - 3
SP  - 385
VL  - 19
DO  - 10.2298/CICEQ120326073D
ER  - 

@article{
author = "Drmanić, Saša and Nikolić, Jasmina and Marinković, Aleksandar and Šekularac, Gavrilo and Jovanović, Bratislav Ž.",
year = "2013",
abstract = "The ultraviolet absorption spectra of the carboxyl group of three isomeric pyridine carboxylic acids N-oxides (picolinic acid N-oxide, nicotinic acid N-oxide and isonicotinic acid N-oxide) were determined in fourteen solvents in the wavelength range from 200 to 400 nm. The position of the absorption maxima (λmax) of the examined acids showed that the ultraviolet absorption maximum wavelengths of picolinic acid N-oxide are the shortest, and those of isonicotinic acid N-oxide acid are the longest. In order to analyze the solvent effect on the obtained absorption spectra, the ultraviolet absorption frequen­cies of the electronic transitions in the carboxylic group of the examined acids were correlated using a total solvatochromic equation of the form Vmax = V0 + + Sπ*+ aα+ bβ, where Vmax is the absorption frequency (1/λmax), π*is a measure of the solvent polarity, β represents the scale of solvent hydrogen bond acceptor basicities and α represents the scale of solvent hydrogen bond donor acidities. The correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The solvent effects on the ultra­violet absorption maximums of the examined acids were discussed., UV apsorpcioni spektri pikolinske kiseline N-oksida, nikotinske kiseline N-oksida i izonikotinske kiseline N-oksida određeni su u 14 protičnih i aprotičnih rastvarača u opsegu od 200-400 nm. Položaji maksimuma apsorpcije bili su najniži za pikolinsku kiseline N-oksid, a najviši za izonikotinsku kiseline N-oksid. Da bi se analizirao uticaj ratvarača, apsorpcione frekvence su korelisane Kamlet-Taftovom jednačinom, kojom se uticaj polarnosti/polarizabilnosti, proton-donorskog i proton-akceptorskog dejstva rastvarača može kvantitativno izraziti.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides, Uticaj rastvarača i strukture na elektronske absorpcione spektre izomernih piridin-karboksilnih kiselina N-oksida",
pages = "388-385",
number = "3",
volume = "19",
doi = "10.2298/CICEQ120326073D"
}

Drmanić, S., Nikolić, J., Marinković, A., Šekularac, G.,& Jovanović, B. Ž.. (2013). The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides. in Chemical Industry & Chemical Engineering Quarterly
Association of the Chemical Engineers of Serbia., 19(3), 385-388.
https://doi.org/10.2298/CICEQ120326073D

Drmanić S, Nikolić J, Marinković A, Šekularac G, Jovanović BŽ. The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides. in Chemical Industry & Chemical Engineering Quarterly. 2013;19(3):385-388.
doi:10.2298/CICEQ120326073D .

Drmanić, Saša, Nikolić, Jasmina, Marinković, Aleksandar, Šekularac, Gavrilo, Jovanović, Bratislav Ž., "The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides" in Chemical Industry & Chemical Engineering Quarterly, 19, no. 3 (2013):385-388,
https://doi.org/10.2298/CICEQ120326073D . .