TY  - JOUR
AU  - Popović, Marko
AU  - Šekularac, Gavrilo
AU  - Mihailović, Marija
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7474
AB  - For thousands of years, medicine has made efforts to study and heal infectious diseases. For centuries, medicine and biology have attempted to study the mechanisms of development of infectious diseases. For 100 years, virology has tried to understand and describe different viruses and reveal the secrets of pathophysiology of infections. Several decades ago, the efforts of biomedical scientists were joined by chemists. Since then viruses have been explored not only as biological systems, but also as chemical systems. With the beginning of the COVID-19 pandemic, biothermodynamics has made its contribution to the research on driving forces and mechanisms of lifecycles of viruses, the virus-host interaction. Since then, viruses have been analyzed as biological, chemical and thermodynamic systems. After reporting of chemical and thermodynamic properties of SARS-CoV, MERS-CoV, SARS-CoV-2, Ebola, Mpox, West Nile virus and bacteriophages, this paper reports for the first time the empirical formulas (unit carbon formulas) of Rotavirus A, as well as its thermodynamic properties of virus-host interaction at the membrane (antigen-receptor binding) and virus-host interaction in the cytoplasm (virus multiplication). The virus-host interactions are essentially chemical reactions, the driving force of which is Gibbs energy (of binding and biosynthesis).
PB  - Elsevier
T2  - Microbial Risk Analysis
T1  - Like a summer storm: Biothermodynamic analysis of Rotavirus A - Empirical formula, biosynthesis reaction and driving force of virus multiplication and antigen-receptor binding
VL  - 26
SP  - 100291
DO  - 10.1016/j.mran.2024.100291
ER  - 

@article{
author = "Popović, Marko and Šekularac, Gavrilo and Mihailović, Marija",
year = "2024",
abstract = "For thousands of years, medicine has made efforts to study and heal infectious diseases. For centuries, medicine and biology have attempted to study the mechanisms of development of infectious diseases. For 100 years, virology has tried to understand and describe different viruses and reveal the secrets of pathophysiology of infections. Several decades ago, the efforts of biomedical scientists were joined by chemists. Since then viruses have been explored not only as biological systems, but also as chemical systems. With the beginning of the COVID-19 pandemic, biothermodynamics has made its contribution to the research on driving forces and mechanisms of lifecycles of viruses, the virus-host interaction. Since then, viruses have been analyzed as biological, chemical and thermodynamic systems. After reporting of chemical and thermodynamic properties of SARS-CoV, MERS-CoV, SARS-CoV-2, Ebola, Mpox, West Nile virus and bacteriophages, this paper reports for the first time the empirical formulas (unit carbon formulas) of Rotavirus A, as well as its thermodynamic properties of virus-host interaction at the membrane (antigen-receptor binding) and virus-host interaction in the cytoplasm (virus multiplication). The virus-host interactions are essentially chemical reactions, the driving force of which is Gibbs energy (of binding and biosynthesis).",
publisher = "Elsevier",
journal = "Microbial Risk Analysis",
title = "Like a summer storm: Biothermodynamic analysis of Rotavirus A - Empirical formula, biosynthesis reaction and driving force of virus multiplication and antigen-receptor binding",
volume = "26",
pages = "100291",
doi = "10.1016/j.mran.2024.100291"
}

Popović, M., Šekularac, G.,& Mihailović, M.. (2024). Like a summer storm: Biothermodynamic analysis of Rotavirus A - Empirical formula, biosynthesis reaction and driving force of virus multiplication and antigen-receptor binding. in Microbial Risk Analysis
Elsevier., 26, 100291.
https://doi.org/10.1016/j.mran.2024.100291

Popović M, Šekularac G, Mihailović M. Like a summer storm: Biothermodynamic analysis of Rotavirus A - Empirical formula, biosynthesis reaction and driving force of virus multiplication and antigen-receptor binding. in Microbial Risk Analysis. 2024;26:100291.
doi:10.1016/j.mran.2024.100291 .

Popović, Marko, Šekularac, Gavrilo, Mihailović, Marija, "Like a summer storm: Biothermodynamic analysis of Rotavirus A - Empirical formula, biosynthesis reaction and driving force of virus multiplication and antigen-receptor binding" in Microbial Risk Analysis, 26 (2024):100291,
https://doi.org/10.1016/j.mran.2024.100291 . .

TY  - JOUR
AU  - Popović, Marko
AU  - Šekularac, Gavrilo
AU  - Popović, Marta
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7434
AB  - A question is often asked about what tomorrow brings. During the last 4 years of the COVID-19 pandemic, this question was asked with every appearance of a new SARS-CoV-2 variant. It seems that science has an ability to offer a relatively reliable answer. Theoretical and experimental research have allowed a deep insight into structure and function of SARS-CoV-2. Moreover, the developed mechanistic models allow prediction of virus-host interactions. In August 2023, the Omicron BA.2.86 Pirola variant was detected. Taught by the bad experience from 2019 to 2023, when every new variant that appeared during SARS-CoV-2 evolution has caused a new pandemic wave, the question was raised whether this will be the case with the new variant. Research presented in this paper shows that the driving force for antigen-receptor binding of the Omicron BA.2.86 variant is lower than that of the BN.1 and similar to that of the other variants. Based on the presented research, it seems that the new variant will not be more aggressive relative to the previous variants. The movement in the number of newly infected cases in USA in the period between August and mid-October 2023 is in favor of this prediction.
PB  - Elsevier
T2  - Microbial Risk Analysis
T1  - The wind of change: Gibbs energy of binding and infectivity evolution of Omicron BA.2.86 Pirola, EG.5.1, XBB.1.16 Arcturus, CH.1.1 and BN.1 variants of SARS-CoV-2
VL  - 26
SP  - 100290
DO  - 10.1016/j.mran.2024.100290
ER  - 

@article{
author = "Popović, Marko and Šekularac, Gavrilo and Popović, Marta",
year = "2024",
abstract = "A question is often asked about what tomorrow brings. During the last 4 years of the COVID-19 pandemic, this question was asked with every appearance of a new SARS-CoV-2 variant. It seems that science has an ability to offer a relatively reliable answer. Theoretical and experimental research have allowed a deep insight into structure and function of SARS-CoV-2. Moreover, the developed mechanistic models allow prediction of virus-host interactions. In August 2023, the Omicron BA.2.86 Pirola variant was detected. Taught by the bad experience from 2019 to 2023, when every new variant that appeared during SARS-CoV-2 evolution has caused a new pandemic wave, the question was raised whether this will be the case with the new variant. Research presented in this paper shows that the driving force for antigen-receptor binding of the Omicron BA.2.86 variant is lower than that of the BN.1 and similar to that of the other variants. Based on the presented research, it seems that the new variant will not be more aggressive relative to the previous variants. The movement in the number of newly infected cases in USA in the period between August and mid-October 2023 is in favor of this prediction.",
publisher = "Elsevier",
journal = "Microbial Risk Analysis",
title = "The wind of change: Gibbs energy of binding and infectivity evolution of Omicron BA.2.86 Pirola, EG.5.1, XBB.1.16 Arcturus, CH.1.1 and BN.1 variants of SARS-CoV-2",
volume = "26",
pages = "100290",
doi = "10.1016/j.mran.2024.100290"
}

Popović, M., Šekularac, G.,& Popović, M.. (2024). The wind of change: Gibbs energy of binding and infectivity evolution of Omicron BA.2.86 Pirola, EG.5.1, XBB.1.16 Arcturus, CH.1.1 and BN.1 variants of SARS-CoV-2. in Microbial Risk Analysis
Elsevier., 26, 100290.
https://doi.org/10.1016/j.mran.2024.100290

Popović M, Šekularac G, Popović M. The wind of change: Gibbs energy of binding and infectivity evolution of Omicron BA.2.86 Pirola, EG.5.1, XBB.1.16 Arcturus, CH.1.1 and BN.1 variants of SARS-CoV-2. in Microbial Risk Analysis. 2024;26:100290.
doi:10.1016/j.mran.2024.100290 .

Popović, Marko, Šekularac, Gavrilo, Popović, Marta, "The wind of change: Gibbs energy of binding and infectivity evolution of Omicron BA.2.86 Pirola, EG.5.1, XBB.1.16 Arcturus, CH.1.1 and BN.1 variants of SARS-CoV-2" in Microbial Risk Analysis, 26 (2024):100290,
https://doi.org/10.1016/j.mran.2024.100290 . .

TY  - JOUR
AU  - Popović, Marko
AU  - Šekularac, Gavrilo
AU  - Stevanović, Maja
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6906
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
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
VL  - 379
SP  - 6
EP  - 17
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",
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",
volume = "379",
pages = "6-17",
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., 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  - Božić, Katarina
AU  - Pavlović, Miroslav
AU  - Šekularac, Gavrilo
AU  - Panić, Stefan
AU  - Pantović Pavlović, Marijana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6500
AB  - Electrophoretic deposition (EPD) occurs as a cataphoretic deposition – the coating is deposited on the cathode, and anaphoretic deposition – the coating is deposited on the anode. The primary purpose of EPD is to obtain compact and uniform organic/inorganic coatings of the desired thickness and adhesion on metal surfaces by applying an electric field to the particles of coating precursor. EPD basic principles for coatings deposition concerning fundamental explanations and considerations of practical parameters of the process are presented. Cataphoretic deposition has become popular because it can apply organic coatings to complex structures that are otherwise very difficult to coat. These coatings were found to improve the characteristics of the substrate, such as biocompatibility, appearance and resistance to the corrosion processes. The key EPD parameters are composition, pH value and viscosity of deposition medium, as well as zeta potential of the particles, electric field strength, etc. A  special survey is given to the process of anaphoretic deposition, which is relatively new, and its advantages over cataphoretic deposition are discussed. 
Through the process of joint anaphoresis/substrate anodization process, the sur face of the substrate is simultaneously anodized and modified by incorporation 
of the foreign particles into the anodic layer. The coatings of mixed compo sition of better adhesion and corrosion resistance with respect to cataphoretic ally-deposited coatings are obtained as result.
AB  - Електрофоретско таложење (ЕPD) може се јавити као катафоретско таложење – превлака се таложи на катоди, и анафоретскo таложење – превлака се таложи на аноди. Примарна сврха ЕPD је добијање компактних и уједначених органских/неорганских превлака жељене дебљине и адхезије на металне површине применом електричног поља на честице прекурсора превлаке. Приказани су основни принципи ЕPD за наношење превлака који се односе на основна објашњења и разматрања практичних параметара процеса. Катафоретско таложење постало је популарно јер може нанети органске превлаке на сложене структуре на које је иначе веома тешко нанети превлаку. Утврђено је да ове превлаке побољшавају карактеристике подлоге, као што су биокомпатибилност, изглед и отпорност на процесе корозије. Кључни ЕPD параметри су састав, pH вредност и вискозност медијума за таложење, као и зета потенцијал честица, јачина електричног поља, итд. Посебан осврт је усмерен на процес анафоретског таложења, који је релативно нов, и његовим предностима. Расправља се и о катафоретском таложењу. Процесом здруженог процеса анафорезе/анодизације супстрата, површина подлоге се истовремено анодизује и модификује уграђивањем честица превлаке у анодни слој. Добијају се превлаке мешовитог састава, боље адхезије и отпорности на корозију у односу на катафоретски нанесене превлаке.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Application aspects of joint anaphoresis/substrate anodization in production of biocompatible ceramic coatings
T1  - Аспекти примене двојног процеса анафорезе/анодизације супстрата за формирање биокомпатибилних керамичких превлака
VL  - 88
IS  - 7-8
SP  - 685
EP  - 704
DO  - 10.2298/JSC230118034B
ER  - 

@article{
author = "Božić, Katarina and Pavlović, Miroslav and Šekularac, Gavrilo and Panić, Stefan and Pantović Pavlović, Marijana",
year = "2023",
abstract = "Electrophoretic deposition (EPD) occurs as a cataphoretic deposition – the coating is deposited on the cathode, and anaphoretic deposition – the coating is deposited on the anode. The primary purpose of EPD is to obtain compact and uniform organic/inorganic coatings of the desired thickness and adhesion on metal surfaces by applying an electric field to the particles of coating precursor. EPD basic principles for coatings deposition concerning fundamental explanations and considerations of practical parameters of the process are presented. Cataphoretic deposition has become popular because it can apply organic coatings to complex structures that are otherwise very difficult to coat. These coatings were found to improve the characteristics of the substrate, such as biocompatibility, appearance and resistance to the corrosion processes. The key EPD parameters are composition, pH value and viscosity of deposition medium, as well as zeta potential of the particles, electric field strength, etc. A  special survey is given to the process of anaphoretic deposition, which is relatively new, and its advantages over cataphoretic deposition are discussed. 
Through the process of joint anaphoresis/substrate anodization process, the sur face of the substrate is simultaneously anodized and modified by incorporation 
of the foreign particles into the anodic layer. The coatings of mixed compo sition of better adhesion and corrosion resistance with respect to cataphoretic ally-deposited coatings are obtained as result., Електрофоретско таложење (ЕPD) може се јавити као катафоретско таложење – превлака се таложи на катоди, и анафоретскo таложење – превлака се таложи на аноди. Примарна сврха ЕPD је добијање компактних и уједначених органских/неорганских превлака жељене дебљине и адхезије на металне површине применом електричног поља на честице прекурсора превлаке. Приказани су основни принципи ЕPD за наношење превлака који се односе на основна објашњења и разматрања практичних параметара процеса. Катафоретско таложење постало је популарно јер може нанети органске превлаке на сложене структуре на које је иначе веома тешко нанети превлаку. Утврђено је да ове превлаке побољшавају карактеристике подлоге, као што су биокомпатибилност, изглед и отпорност на процесе корозије. Кључни ЕPD параметри су састав, pH вредност и вискозност медијума за таложење, као и зета потенцијал честица, јачина електричног поља, итд. Посебан осврт је усмерен на процес анафоретског таложења, који је релативно нов, и његовим предностима. Расправља се и о катафоретском таложењу. Процесом здруженог процеса анафорезе/анодизације супстрата, површина подлоге се истовремено анодизује и модификује уграђивањем честица превлаке у анодни слој. Добијају се превлаке мешовитог састава, боље адхезије и отпорности на корозију у односу на катафоретски нанесене превлаке.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Application aspects of joint anaphoresis/substrate anodization in production of biocompatible ceramic coatings, Аспекти примене двојног процеса анафорезе/анодизације супстрата за формирање биокомпатибилних керамичких превлака",
volume = "88",
number = "7-8",
pages = "685-704",
doi = "10.2298/JSC230118034B"
}

Božić, K., Pavlović, M., Šekularac, G., Panić, S.,& Pantović Pavlović, M.. (2023). Application aspects of joint anaphoresis/substrate anodization in production of biocompatible ceramic coatings. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 88(7-8), 685-704.
https://doi.org/10.2298/JSC230118034B

Božić K, Pavlović M, Šekularac G, Panić S, Pantović Pavlović M. Application aspects of joint anaphoresis/substrate anodization in production of biocompatible ceramic coatings. in Journal of the Serbian Chemical Society. 2023;88(7-8):685-704.
doi:10.2298/JSC230118034B .

Božić, Katarina, Pavlović, Miroslav, Šekularac, Gavrilo, Panić, Stefan, Pantović Pavlović, Marijana, "Application aspects of joint anaphoresis/substrate anodization in production of biocompatible ceramic coatings" in Journal of the Serbian Chemical Society, 88, no. 7-8 (2023):685-704,
https://doi.org/10.2298/JSC230118034B . .

TY  - JOUR
AU  - Popović, Marko E.
AU  - Pantović-Pavlović, Marijana
AU  - Šekularac, Gavrilo
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6847
AB  - Biothermodynamics is a discipline which has developed intensely during the last 50 years. Thermodynamic properties have been reported for humans, animals, plants and microorganisms. However, this paper reports for the first time the empirical formula and thermodynamic properties for insects. Thermodynamic properties can be applied in research on thermodynamic interactions between organisms and their environment, as well as between organisms themselves. This paper reports for the first time the empirical formula and reactions of catabolism, biosynthesis and entire metabolism are formulated for Bombyx mori (domestic silk moth), as well as the thermodynamic properties of B. mori. It is shown that growth of B. mori is tightly related to catabolism of carbohydrates and lipids, which represents the driving force for the entire metabolism.
PB  - Society of Thermal Engineers of Serbia
T2  - Thermal Science
T1  - Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions
VL  - 27
IS  - 6 Part B
SP  - 4893
EP  - 4910
DO  - 10.2298/TSCI230901242P
ER  - 

@article{
author = "Popović, Marko E. and Pantović-Pavlović, Marijana and Šekularac, Gavrilo",
year = "2023",
abstract = "Biothermodynamics is a discipline which has developed intensely during the last 50 years. Thermodynamic properties have been reported for humans, animals, plants and microorganisms. However, this paper reports for the first time the empirical formula and thermodynamic properties for insects. Thermodynamic properties can be applied in research on thermodynamic interactions between organisms and their environment, as well as between organisms themselves. This paper reports for the first time the empirical formula and reactions of catabolism, biosynthesis and entire metabolism are formulated for Bombyx mori (domestic silk moth), as well as the thermodynamic properties of B. mori. It is shown that growth of B. mori is tightly related to catabolism of carbohydrates and lipids, which represents the driving force for the entire metabolism.",
publisher = "Society of Thermal Engineers of Serbia",
journal = "Thermal Science",
title = "Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions",
volume = "27",
number = "6 Part B",
pages = "4893-4910",
doi = "10.2298/TSCI230901242P"
}

Popović, M. E., Pantović-Pavlović, M.,& Šekularac, G.. (2023). Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions. in Thermal Science
Society of Thermal Engineers of Serbia., 27(6 Part B), 4893-4910.
https://doi.org/10.2298/TSCI230901242P

Popović ME, Pantović-Pavlović M, Šekularac G. Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions. in Thermal Science. 2023;27(6 Part B):4893-4910.
doi:10.2298/TSCI230901242P .

Popović, Marko E., Pantović-Pavlović, Marijana, Šekularac, Gavrilo, "Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions" in Thermal Science, 27, no. 6 Part B (2023):4893-4910,
https://doi.org/10.2298/TSCI230901242P . .

TY  - JOUR
AU  - Šćepanović, Jelena
AU  - Pantović-Pavlović, Marijana
AU  - Vuksanović, Darko
AU  - Šekularac, Gavrilo
AU  - Pavlović, Miroslav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7074
AB  - This research discusses the corrosion behavior of as-cast Al alloys with different Mg content by potentiostatic electrochemical impedance spectroscopy (PEIS). The complex plane spectra of all samples feature a high-frequency loop, followed by semi-infinite diffusion impedance characteristics at low frequencies, with the corrosion-induced formation of a defined porous structure of a layer making finite diffusion through the pores dominant upon prolonged exposure. The most compact layer causes the most pronounced and well-resolved finite diffusion features in the impedance spectra of the sample with the highest Mg content, while the sample with the lowest Mg content has a highly porous layer unable to slow down the corrosion rate at the layer//sample interface. The highest layer capacitance and diffusion admittance are found in the sample with the highest Mg content, with a more adherent protective film expected to form. However, the growth rate of the layer was not adequate for the remarkable closing of the pits, indicating the weakness of this sample towards pit activity. The results show that increasing Mg content improves corrosion resistance and clearly separates bulky corrosion from localized pitting corrosion, but it also increases the thickness of a more compact, poorly adhesive layer.
AB  - Ово истраживање се бави понашањем корозије Аl легура са различитим садржајем Мg уз примену потенциостатске електрохемијске импедансне спектроскопије (PEIS). Спектри у комплексној равни свих узорака се карактеришу петљом високе фреквенције праћеном карактеристикама полу-бесконачне дифузије на ниским фреквенцијама, са формирањем дефинисане порозне структуре слоја услед корозије, што доводи до доминације коначне дифузије кроз поре при продуженој изложености. Најкомпактнији слој узрокује најизраженије и најјасније карактеристике коначне дифузије у импедансним спектрима узорка са највећим садржајем Mg, док узорак са најмањим садржајем Mg има високо порозан слој који не може успорити брзину корозије на граници фаза слој/узорак. Највећу капацитивност и адмитанцију дифузионог слоја има узорак са највећим садржајем Mg, са очекиваном појавом адекватног заштитног филма. Међутим, брзина раста слоја није била довољна за значајно затварање питова, што указује на слабост овог узорка према питинг корозији. Резултати показују да повећање садржаја Mg побољшава отпорност на корозију и јасно раздваја корозију у маси материјала од локализоване питинг корозије, али истовремено повећава дебљину слоја који је слабије адхезије и компактнији.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Impedance response of aluminum alloys with varying Mg content in Al–Mg systems during exposure to chloride corrosion environment
T1  - Импедансни одзив алуминијумских легура са различитим садржајем магнезијума током изложености хлоридној корозионој средини
VL  - 88
IS  - 10
SP  - 1025
EP  - 1037
DO  - 10.2298/JSC230505031S
ER  - 

@article{
author = "Šćepanović, Jelena and Pantović-Pavlović, Marijana and Vuksanović, Darko and Šekularac, Gavrilo and Pavlović, Miroslav",
year = "2023",
abstract = "This research discusses the corrosion behavior of as-cast Al alloys with different Mg content by potentiostatic electrochemical impedance spectroscopy (PEIS). The complex plane spectra of all samples feature a high-frequency loop, followed by semi-infinite diffusion impedance characteristics at low frequencies, with the corrosion-induced formation of a defined porous structure of a layer making finite diffusion through the pores dominant upon prolonged exposure. The most compact layer causes the most pronounced and well-resolved finite diffusion features in the impedance spectra of the sample with the highest Mg content, while the sample with the lowest Mg content has a highly porous layer unable to slow down the corrosion rate at the layer//sample interface. The highest layer capacitance and diffusion admittance are found in the sample with the highest Mg content, with a more adherent protective film expected to form. However, the growth rate of the layer was not adequate for the remarkable closing of the pits, indicating the weakness of this sample towards pit activity. The results show that increasing Mg content improves corrosion resistance and clearly separates bulky corrosion from localized pitting corrosion, but it also increases the thickness of a more compact, poorly adhesive layer., Ово истраживање се бави понашањем корозије Аl легура са различитим садржајем Мg уз примену потенциостатске електрохемијске импедансне спектроскопије (PEIS). Спектри у комплексној равни свих узорака се карактеришу петљом високе фреквенције праћеном карактеристикама полу-бесконачне дифузије на ниским фреквенцијама, са формирањем дефинисане порозне структуре слоја услед корозије, што доводи до доминације коначне дифузије кроз поре при продуженој изложености. Најкомпактнији слој узрокује најизраженије и најјасније карактеристике коначне дифузије у импедансним спектрима узорка са највећим садржајем Mg, док узорак са најмањим садржајем Mg има високо порозан слој који не може успорити брзину корозије на граници фаза слој/узорак. Највећу капацитивност и адмитанцију дифузионог слоја има узорак са највећим садржајем Mg, са очекиваном појавом адекватног заштитног филма. Међутим, брзина раста слоја није била довољна за значајно затварање питова, што указује на слабост овог узорка према питинг корозији. Резултати показују да повећање садржаја Mg побољшава отпорност на корозију и јасно раздваја корозију у маси материјала од локализоване питинг корозије, али истовремено повећава дебљину слоја који је слабије адхезије и компактнији.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Impedance response of aluminum alloys with varying Mg content in Al–Mg systems during exposure to chloride corrosion environment, Импедансни одзив алуминијумских легура са различитим садржајем магнезијума током изложености хлоридној корозионој средини",
volume = "88",
number = "10",
pages = "1025-1037",
doi = "10.2298/JSC230505031S"
}

Šćepanović, J., Pantović-Pavlović, M., Vuksanović, D., Šekularac, G.,& Pavlović, M.. (2023). Impedance response of aluminum alloys with varying Mg content in Al–Mg systems during exposure to chloride corrosion environment. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 88(10), 1025-1037.
https://doi.org/10.2298/JSC230505031S

Šćepanović J, Pantović-Pavlović M, Vuksanović D, Šekularac G, Pavlović M. Impedance response of aluminum alloys with varying Mg content in Al–Mg systems during exposure to chloride corrosion environment. in Journal of the Serbian Chemical Society. 2023;88(10):1025-1037.
doi:10.2298/JSC230505031S .

Šćepanović, Jelena, Pantović-Pavlović, Marijana, Vuksanović, Darko, Šekularac, Gavrilo, Pavlović, Miroslav, "Impedance response of aluminum alloys with varying Mg content in Al–Mg systems during exposure to chloride corrosion environment" in Journal of the Serbian Chemical Society, 88, no. 10 (2023):1025-1037,
https://doi.org/10.2298/JSC230505031S . .

TY  - JOUR
AU  - Popović, Marko E.
AU  - Pantović-Pavlović, Marijana
AU  - Šekularac, Gavrilo
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7406
AB  - Biothermodynamics is a discipline which has developed intensely during the last 50 years. Thermodynamic properties have been reported for humans, animals, plants and microorganisms. However, this paper reports for the first time the empirical formula and thermodynamic properties for insects. Thermodynamic properties can be applied in research on thermodynamic interactions between organisms and their environment, as well as between organisms themselves. This paper reports for the first time the empirical formula and reactions of catabolism, biosynthesis and entire metabolism are formulated for Bombyx mori (domestic silk moth), as well as the thermodynamic properties of B. mori. It is shown that growth of B. mori is tightly related to catabolism of carbohydrates and lipids, which represents the driving force for the entire metabolism.
PB  - Society of Thermal Engineers of Serbia
T2  - Thermal Science
T1  - Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions
VL  - 27
IS  - 6 Part B
SP  - 4893
EP  - 4910
DO  - 10.2298/TSCI230901242P
ER  - 

@article{
author = "Popović, Marko E. and Pantović-Pavlović, Marijana and Šekularac, Gavrilo",
year = "2023",
abstract = "Biothermodynamics is a discipline which has developed intensely during the last 50 years. Thermodynamic properties have been reported for humans, animals, plants and microorganisms. However, this paper reports for the first time the empirical formula and thermodynamic properties for insects. Thermodynamic properties can be applied in research on thermodynamic interactions between organisms and their environment, as well as between organisms themselves. This paper reports for the first time the empirical formula and reactions of catabolism, biosynthesis and entire metabolism are formulated for Bombyx mori (domestic silk moth), as well as the thermodynamic properties of B. mori. It is shown that growth of B. mori is tightly related to catabolism of carbohydrates and lipids, which represents the driving force for the entire metabolism.",
publisher = "Society of Thermal Engineers of Serbia",
journal = "Thermal Science",
title = "Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions",
volume = "27",
number = "6 Part B",
pages = "4893-4910",
doi = "10.2298/TSCI230901242P"
}

Popović, M. E., Pantović-Pavlović, M.,& Šekularac, G.. (2023). Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions. in Thermal Science
Society of Thermal Engineers of Serbia., 27(6 Part B), 4893-4910.
https://doi.org/10.2298/TSCI230901242P

Popović ME, Pantović-Pavlović M, Šekularac G. Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions. in Thermal Science. 2023;27(6 Part B):4893-4910.
doi:10.2298/TSCI230901242P .

Popović, Marko E., Pantović-Pavlović, Marijana, Šekularac, Gavrilo, "Chemical and thermodynamic properties of Bombyx mori (domestic silk moth): Empirical formula, driving force, and biosynthesis, catabolism and metabolism reactions" in Thermal Science, 27, no. 6 Part B (2023):4893-4910,
https://doi.org/10.2298/TSCI230901242P . .

TY  - JOUR
AU  - Popović, Marko
AU  - Popović, Marta
AU  - Šekularac, Gavrilo
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6819
AB  - From July to October, West Nile virus is the leading cause of mosquito born disease in Europe and North America. This paper reports for the first time a chemical and thermodynamic analysis of the West Nile virus particles, genome and proteins, as well as interactions with its host organism. The empirical formula of mature West Nile virus particles was found through the atom counting method. Based on the empirical formula, biosynthesis reactions were formulated, which describe the formation of new virus live matter. Based on the biosynthesis reactions, Gibbs energy of biosynthesis was determined, which represents the physical driving force for the production of viral and host cell components. Gibbs energy of biosynthesis of the West Nile virus was found to be several times more negative than that of its host tissues. Due to the more negative Gibbs energy of biosynthesis, the West Nile virus components are produced much faster than those of its host cells. This allows the virus to hijack the host cell metabolism. Therefore, the virus-host interactions of the West Nile virus were explained through chemical and thermodynamic analysis.
PB  - Elsevier
T2  - Microbial Risk Analysis
T1  - Death from the Nile: Empirical formula, molar mass, biosynthesis reaction and Gibbs energy of biosynthesis of the West Nile virus
VL  - 25
SP  - 100281
DO  - 10.1016/j.mran.2023.100281
ER  - 

@article{
author = "Popović, Marko and Popović, Marta and Šekularac, Gavrilo",
year = "2023",
abstract = "From July to October, West Nile virus is the leading cause of mosquito born disease in Europe and North America. This paper reports for the first time a chemical and thermodynamic analysis of the West Nile virus particles, genome and proteins, as well as interactions with its host organism. The empirical formula of mature West Nile virus particles was found through the atom counting method. Based on the empirical formula, biosynthesis reactions were formulated, which describe the formation of new virus live matter. Based on the biosynthesis reactions, Gibbs energy of biosynthesis was determined, which represents the physical driving force for the production of viral and host cell components. Gibbs energy of biosynthesis of the West Nile virus was found to be several times more negative than that of its host tissues. Due to the more negative Gibbs energy of biosynthesis, the West Nile virus components are produced much faster than those of its host cells. This allows the virus to hijack the host cell metabolism. Therefore, the virus-host interactions of the West Nile virus were explained through chemical and thermodynamic analysis.",
publisher = "Elsevier",
journal = "Microbial Risk Analysis",
title = "Death from the Nile: Empirical formula, molar mass, biosynthesis reaction and Gibbs energy of biosynthesis of the West Nile virus",
volume = "25",
pages = "100281",
doi = "10.1016/j.mran.2023.100281"
}

Popović, M., Popović, M.,& Šekularac, G.. (2023). Death from the Nile: Empirical formula, molar mass, biosynthesis reaction and Gibbs energy of biosynthesis of the West Nile virus. in Microbial Risk Analysis
Elsevier., 25, 100281.
https://doi.org/10.1016/j.mran.2023.100281

Popović M, Popović M, Šekularac G. Death from the Nile: Empirical formula, molar mass, biosynthesis reaction and Gibbs energy of biosynthesis of the West Nile virus. in Microbial Risk Analysis. 2023;25:100281.
doi:10.1016/j.mran.2023.100281 .

Popović, Marko, Popović, Marta, Šekularac, Gavrilo, "Death from the Nile: Empirical formula, molar mass, biosynthesis reaction and Gibbs energy of biosynthesis of the West Nile virus" in Microbial Risk Analysis, 25 (2023):100281,
https://doi.org/10.1016/j.mran.2023.100281 . .

TY  - CHAP
AU  - Šekularac, Gavrilo
AU  - Eraković, Sanja
AU  - Stopić, Srećko
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4357
AB  - Supercapacitors are one of the most promising devices for energy storage, which can, in the highest extent, bridge the batteries/capacitors energy/power gap. Ruthenium oxide is one of the most powerful, with superior pseudocapacitive properties and high theoretical specific capacitance, depending on its structure. It has widespread application in many fields, one of which is as a coating of dimensionally stable anodes (DSA). Different methods for the synthesis of RuO2 are presented, such as the thermal decomposition of RuCl3, the sol-gel process, the polyol process, the silar method, hydrothermal synthesis, spray pyrolysis, the evaporation-induced self-assembly (EISA) method, electrochemical deposition, chemical deposition from the vapor phase, etc. In
recent years, microwave (MW)-assisted procedures were shown to be powerful techniques for the synthesis of a variety of materials, especially metal oxides, through hydrothermal routes. Highly active RuO2 coatings on Ti could be prepared from colloidal suspensions of the oxide synthesized under the rigorous heating conditions induced by microwave irradiation. Intensification of the heating conditions by increased reaction temperatures and pressures produced small particles and increased the surface energy. The most rapid heating conditions generated the smallest high-energy oxide particles, which were able to form compact RuO2 coatings with high electrochemical activity. The coating capacitive performances and the activity for oxygen evolution seemed considerably improved with respect to those of the coating prepared by the traditional thermal decomposition of chloride or usual hydrothermal processing routes. The synthesised material is of highly accessible inner structure, and is an excellent candidate for both low and high power applications.
PB  -  New York, USA : Nova Science Publishers Inc.
T2  - Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
T1  - Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures
SP  - 67
EP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_cer_4357
ER  - 

@inbook{
author = "Šekularac, Gavrilo and Eraković, Sanja and Stopić, Srećko",
year = "2019",
abstract = "Supercapacitors are one of the most promising devices for energy storage, which can, in the highest extent, bridge the batteries/capacitors energy/power gap. Ruthenium oxide is one of the most powerful, with superior pseudocapacitive properties and high theoretical specific capacitance, depending on its structure. It has widespread application in many fields, one of which is as a coating of dimensionally stable anodes (DSA). Different methods for the synthesis of RuO2 are presented, such as the thermal decomposition of RuCl3, the sol-gel process, the polyol process, the silar method, hydrothermal synthesis, spray pyrolysis, the evaporation-induced self-assembly (EISA) method, electrochemical deposition, chemical deposition from the vapor phase, etc. In
recent years, microwave (MW)-assisted procedures were shown to be powerful techniques for the synthesis of a variety of materials, especially metal oxides, through hydrothermal routes. Highly active RuO2 coatings on Ti could be prepared from colloidal suspensions of the oxide synthesized under the rigorous heating conditions induced by microwave irradiation. Intensification of the heating conditions by increased reaction temperatures and pressures produced small particles and increased the surface energy. The most rapid heating conditions generated the smallest high-energy oxide particles, which were able to form compact RuO2 coatings with high electrochemical activity. The coating capacitive performances and the activity for oxygen evolution seemed considerably improved with respect to those of the coating prepared by the traditional thermal decomposition of chloride or usual hydrothermal processing routes. The synthesised material is of highly accessible inner structure, and is an excellent candidate for both low and high power applications.",
publisher = " New York, USA : Nova Science Publishers Inc.",
journal = "Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics",
booktitle = "Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures",
pages = "67-118",
url = "https://hdl.handle.net/21.15107/rcub_cer_4357"
}

Šekularac, G., Eraković, S.,& Stopić, S.. (2019). Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
 New York, USA : Nova Science Publishers Inc.., 67-118.
https://hdl.handle.net/21.15107/rcub_cer_4357

Šekularac G, Eraković S, Stopić S. Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics. 2019;:67-118.
https://hdl.handle.net/21.15107/rcub_cer_4357 .

Šekularac, Gavrilo, Eraković, Sanja, Stopić, Srećko, "Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures" in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics (2019):67-118,
https://hdl.handle.net/21.15107/rcub_cer_4357 .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Dekanski, Aleksandar
AU  - Đokić, Veljko
AU  - Panjan, Matjaz
AU  - Panić, Vladimir
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2096
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-V C H Verlag Gmbh, Weinheim
T2  - Chemelectrochem
T1  - High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis
VL  - 4
IS  - 10
SP  - 2535
EP  - 2541
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-V C H Verlag Gmbh, Weinheim",
journal = "Chemelectrochem",
title = "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis",
volume = "4",
number = "10",
pages = "2535-2541",
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-V C H 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  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Živković, Ljiljana S.
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2125
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
VL  - 90
IS  - 2
SP  - 251
EP  - 258
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",
volume = "90",
number = "2",
pages = "251-258",
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  - Eraković, Sanja
AU  - Mijin, Dušan
AU  - Pavelkić, Vesna
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2140
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  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications
VL  - 82
IS  - 6
SP  - 695
EP  - 709
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 = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications",
volume = "82",
number = "6",
pages = "695-709",
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
Serbian Chemical Society., 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 S.
AU  - Nikšić, Miomir
AU  - Žižak, Željko
AU  - Vukovic, Nebojsa
AU  - Šekularac, Gavrilo
AU  - Drmanić, Saša Ž.
AU  - Bugarski, Branko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1966
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
T2  - Journal of Functional Foods
T1  - Biological potential of puffballs: A comparative analysis
VL  - 21
SP  - 36
EP  - 49
DO  - 10.1016/j.jff.2015.11.039
ER  - 

@article{
author = "Petrović, Predrag and Vunduk, Jovana and Klaus, Anita and Kozarski, Maja S. and Nikšić, Miomir and Žižak, Željko and Vukovic, Nebojsa and Šekularac, Gavrilo and Drmanić, Saša Ž. 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",
journal = "Journal of Functional Foods",
title = "Biological potential of puffballs: A comparative analysis",
volume = "21",
pages = "36-49",
doi = "10.1016/j.jff.2015.11.039"
}

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

Petrović P, Vunduk J, Klaus A, Kozarski MS, Nikšić M, Žižak Ž, Vukovic N, Šekularac G, Drmanić SŽ, 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 S., Nikšić, Miomir, Žižak, Željko, Vukovic, Nebojsa, Šekularac, Gavrilo, Drmanić, Saša Ž., 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  - JOUR
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Drvenica, Ivana
AU  - Dekanski, Aleksandar
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1932
AB  - Ruthenium oxide coating on titanium was prepared by the sol-gel procedure from well-defined colloidal oxide dispersions synthesized by the microwave (MW)-assisted hydrothermal route under defined temperature and pressure heating conditions. The dispersions were characterized by dynamic light scattering (DLS) measurements and scanning electron microscopy (SEM). The electrochemical properties were analyzed as capacitive performances gained by cyclic voltammetry and electrochemical impedance spectroscopy and as the electrocatalytic activity for oxygen evolution from acid solution. The obtained dispersions were polydisperse and contained regular particles and agglomerates of increasing surface energy and decreasing particle size as the MW-assisted heating conditions were intensified. Owing to these features of the precursor dispersions, the obtained coatings had considerably improved capacitive performances and good electrocatalytic activity for oxygen evolution at high overpotentials.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure
VL  - 20
IS  - 11
SP  - 3115
EP  - 3123
DO  - 10.1007/s10008-016-3343-z
ER  - 

@article{
author = "Šekularac, Gavrilo and Košević, Milica and Drvenica, Ivana and Dekanski, Aleksandar and Panić, Vladimir and Nikolic, Branislav",
year = "2016",
abstract = "Ruthenium oxide coating on titanium was prepared by the sol-gel procedure from well-defined colloidal oxide dispersions synthesized by the microwave (MW)-assisted hydrothermal route under defined temperature and pressure heating conditions. The dispersions were characterized by dynamic light scattering (DLS) measurements and scanning electron microscopy (SEM). The electrochemical properties were analyzed as capacitive performances gained by cyclic voltammetry and electrochemical impedance spectroscopy and as the electrocatalytic activity for oxygen evolution from acid solution. The obtained dispersions were polydisperse and contained regular particles and agglomerates of increasing surface energy and decreasing particle size as the MW-assisted heating conditions were intensified. Owing to these features of the precursor dispersions, the obtained coatings had considerably improved capacitive performances and good electrocatalytic activity for oxygen evolution at high overpotentials.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure",
volume = "20",
number = "11",
pages = "3115-3123",
doi = "10.1007/s10008-016-3343-z"
}

Šekularac, G., Košević, M., Drvenica, I., Dekanski, A., Panić, V.,& Nikolic, B.. (2016). Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure. in Journal of Solid State Electrochemistry
Springer, New York., 20(11), 3115-3123.
https://doi.org/10.1007/s10008-016-3343-z

Šekularac G, Košević M, Drvenica I, Dekanski A, Panić V, Nikolic B. Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure. in Journal of Solid State Electrochemistry. 2016;20(11):3115-3123.
doi:10.1007/s10008-016-3343-z .

Šekularac, Gavrilo, Košević, Milica, Drvenica, Ivana, Dekanski, Aleksandar, Panić, Vladimir, Nikolic, Branislav, "Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure" in Journal of Solid State Electrochemistry, 20, no. 11 (2016):3115-3123,
https://doi.org/10.1007/s10008-016-3343-z . .

TY  - JOUR
AU  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Panić, Vladimir
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3415
AB  - Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.
PB  - International Association of Physical Chemists (IAPC)
T2  - Journal of Electrochemical Science and Engineering
T1  - On the stability of platinum-composite electrocatalysts prepared with different substrate materials
VL  - 6
IS  - 1
SP  - 29
EP  - 35
DO  - 10.5599/jese.269
ER  - 

@article{
author = "Košević, Milica and Šekularac, Gavrilo and Panić, Vladimir",
year = "2016",
abstract = "Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.",
publisher = "International Association of Physical Chemists (IAPC)",
journal = "Journal of Electrochemical Science and Engineering",
title = "On the stability of platinum-composite electrocatalysts prepared with different substrate materials",
volume = "6",
number = "1",
pages = "29-35",
doi = "10.5599/jese.269"
}

Košević, M., Šekularac, G.,& Panić, V.. (2016). On the stability of platinum-composite electrocatalysts prepared with different substrate materials. in Journal of Electrochemical Science and Engineering
International Association of Physical Chemists (IAPC)., 6(1), 29-35.
https://doi.org/10.5599/jese.269

Košević M, Šekularac G, Panić V. On the stability of platinum-composite electrocatalysts prepared with different substrate materials. in Journal of Electrochemical Science and Engineering. 2016;6(1):29-35.
doi:10.5599/jese.269 .

Košević, Milica, Šekularac, Gavrilo, Panić, Vladimir, "On the stability of platinum-composite electrocatalysts prepared with different substrate materials" in Journal of Electrochemical Science and Engineering, 6, no. 1 (2016):29-35,
https://doi.org/10.5599/jese.269 . .

TY  - JOUR
AU  - Pavelkić, Vesna
AU  - Brdaric, Tanja P
AU  - Petrovic, Marija P
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Pezo, Lato
AU  - Ilic, Marija A
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1679
AB  - The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Peleg's rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Peleg's rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION
VL  - 21
IS  - 4
SP  - 485
EP  - 492
DO  - 10.2298/CICEQ141014004P
ER  - 

@article{
author = "Pavelkić, Vesna and Brdaric, Tanja P and Petrovic, Marija P and Šekularac, Gavrilo and Košević, Milica and Pezo, Lato and Ilic, Marija A",
year = "2015",
abstract = "The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Peleg's rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Peleg's rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION",
volume = "21",
number = "4",
pages = "485-492",
doi = "10.2298/CICEQ141014004P"
}

Pavelkić, V., Brdaric, T. P., Petrovic, M. P., Šekularac, G., Košević, M., Pezo, L.,& Ilic, M. A.. (2015). APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(4), 485-492.
https://doi.org/10.2298/CICEQ141014004P

Pavelkić V, Brdaric TP, Petrovic MP, Šekularac G, Košević M, Pezo L, Ilic MA. APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(4):485-492.
doi:10.2298/CICEQ141014004P .

Pavelkić, Vesna, Brdaric, Tanja P, Petrovic, Marija P, Šekularac, Gavrilo, Košević, Milica, Pezo, Lato, Ilic, Marija A, "APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 4 (2015):485-492,
https://doi.org/10.2298/CICEQ141014004P . .

TY  - CONF
AU  - Šekularac, Gavrilo
AU  - Dekanski, Aleksandar
AU  - Pavelkić, Vesna
AU  - Stevanović, Sanja
AU  - Košević, Milica
AU  - Drmanić, Saša Ž.
AU  - Kostić, Ivana
AU  - Panić, Vladimir
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3552
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
SP  - 93
EP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_cer_3552
ER  - 

@conference{
author = "Šekularac, Gavrilo and Dekanski, Aleksandar and Pavelkić, Vesna and Stevanović, Sanja and Košević, Milica and Drmanić, Saša Ž. 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_cer_3552"
}

Šekularac, G., Dekanski, A., Pavelkić, V., Stevanović, S., Košević, M., Drmanić, S. Ž., 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_cer_3552

Šekularac G, Dekanski A, Pavelkić V, Stevanović S, Košević M, Drmanić SŽ, 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_cer_3552 .

Šekularac, Gavrilo, Dekanski, Aleksandar, Pavelkić, Vesna, Stevanović, Sanja, Košević, Milica, Drmanić, Saša Ž., 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_cer_3552 .

TY  - CONF
AU  - Košević, Milica
AU  - Stevanović, Sanja
AU  - Šekularac, Gavrilo
AU  - Pavelkić, Vesna
AU  - Jovanović, Vladislava M.
AU  - Panić, Vladimir
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3553
AB  - TiO2 was synthesized by forced hydrolysis process in order to be used as the support for Pt electrocatalyst (Pt/TiO2). Pt was deposited from Pt colloid solution synthesized by microwave-assisted polyol process. TiO2 powder (or C) was dispersed into H2O and 2 M H2SO4. The obtained suspension was stirred and Pt colloid was added afterwards. Upon filtration and rinsing with water, the obtained Pt/TiO2 (or Pt/C) catalyst was thermally treated at 160 C in N2 atmosphere. The catalyst water suspension for the preparation of 0.31 mg/cm2 thin layer electrode was loaded onto glassy carbon disk. Physical and chemical properties of the TiO2 and supported Pt catalyst were characterized by EDS, SEM, dynamic light scattering and XRD techniques. The influence of TiO2 thermal treatment on the electrochemical properties of Pt/TiO2 was also checked. Nominal Pt loading was 20 wt. %. EDS method revealed 18 wt. % loading of Pt on TiO2. The electrochemical properties of the Pt/TiO2 were examined by cyclic voltammetry in 0.1 M HClO4. The obtained results were compared with those obtained for carbon-supported Pt under the same conditions (Figure 1). The charge corresponding to the hydrogen desorption on Pt/TiO2 is lower than expected for 20 wt. % Pt. Although the voltammetric response is typical for Pt-based electrode material, the charge corresponds only to ~3 wt. % Pt. SEM images showed that TiO2 particles tend to form 3μm-sized agglomerates of ellipsoidal shape. The results indicate the possibility for platinum particles to be trapped inside TiO2 agglomerates. Even though calcination of TiO2 improved the Pt uptake from colloidal dispersion, it is still not as effective as commercial carbon support.
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  - Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt
SP  - 118
EP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_cer_3553
ER  - 

@conference{
author = "Košević, Milica and Stevanović, Sanja and Šekularac, Gavrilo and Pavelkić, Vesna and Jovanović, Vladislava M. and Panić, Vladimir",
year = "2015",
abstract = "TiO2 was synthesized by forced hydrolysis process in order to be used as the support for Pt electrocatalyst (Pt/TiO2). Pt was deposited from Pt colloid solution synthesized by microwave-assisted polyol process. TiO2 powder (or C) was dispersed into H2O and 2 M H2SO4. The obtained suspension was stirred and Pt colloid was added afterwards. Upon filtration and rinsing with water, the obtained Pt/TiO2 (or Pt/C) catalyst was thermally treated at 160 C in N2 atmosphere. The catalyst water suspension for the preparation of 0.31 mg/cm2 thin layer electrode was loaded onto glassy carbon disk. Physical and chemical properties of the TiO2 and supported Pt catalyst were characterized by EDS, SEM, dynamic light scattering and XRD techniques. The influence of TiO2 thermal treatment on the electrochemical properties of Pt/TiO2 was also checked. Nominal Pt loading was 20 wt. %. EDS method revealed 18 wt. % loading of Pt on TiO2. The electrochemical properties of the Pt/TiO2 were examined by cyclic voltammetry in 0.1 M HClO4. The obtained results were compared with those obtained for carbon-supported Pt under the same conditions (Figure 1). The charge corresponding to the hydrogen desorption on Pt/TiO2 is lower than expected for 20 wt. % Pt. Although the voltammetric response is typical for Pt-based electrode material, the charge corresponds only to ~3 wt. % Pt. SEM images showed that TiO2 particles tend to form 3μm-sized agglomerates of ellipsoidal shape. The results indicate the possibility for platinum particles to be trapped inside TiO2 agglomerates. Even though calcination of TiO2 improved the Pt uptake from colloidal dispersion, it is still not as effective as commercial carbon support.",
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 = "Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt",
pages = "118-118",
url = "https://hdl.handle.net/21.15107/rcub_cer_3553"
}

Košević, M., Stevanović, S., Šekularac, G., Pavelkić, V., Jovanović, V. M.,& Panić, V.. (2015). Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt. 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., 118-118.
https://hdl.handle.net/21.15107/rcub_cer_3553

Košević M, Stevanović S, Šekularac G, Pavelkić V, Jovanović VM, Panić V. Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:118-118.
https://hdl.handle.net/21.15107/rcub_cer_3553 .

Košević, Milica, Stevanović, Sanja, Šekularac, Gavrilo, Pavelkić, Vesna, Jovanović, Vladislava M., Panić, Vladimir, "Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):118-118,
https://hdl.handle.net/21.15107/rcub_cer_3553 .

TY  - CONF
AU  - Šekularac, Gavrilo
AU  - Dekanski, Aleksandar
AU  - Košević, Milica
AU  - Panić, Vladimir
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3554
AB  - One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 samples were synthesized at temperature 120, 150, 200, 220 and 250 °C in closed vessel. Reaction time was 5 min. 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. The specific capacitance of 320, 550, 750, 750 F/g was obtained for samples synthesized at temperature 150, 200, 220 and 250 °C respectively, cyclic voltammetry curves are shown in (Fig.1). The best capacitive performance was obtained for sample synthesized at temperature of 200 °C, specific capacitance of 750 F/g which negligibly depend on sweep rate in 5–500 mV/s range. 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 highly-ordered prismatic agglomerate sheets are observed for sample synthesized at temperature 200 °C .These findings are quite unusual for this kind of material consisted of rather large particles [1], and makes it excellent candidate for both low and high power applications
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 Crystalline Ruo2 Supercapacitor Materials
SP  - 228
EP  - 228
UR  - https://hdl.handle.net/21.15107/rcub_cer_3554
ER  - 

@conference{
author = "Šekularac, Gavrilo and Dekanski, Aleksandar and Košević, Milica and Panić, Vladimir",
year = "2015",
abstract = "One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 samples were synthesized at temperature 120, 150, 200, 220 and 250 °C in closed vessel. Reaction time was 5 min. 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. The specific capacitance of 320, 550, 750, 750 F/g was obtained for samples synthesized at temperature 150, 200, 220 and 250 °C respectively, cyclic voltammetry curves are shown in (Fig.1). The best capacitive performance was obtained for sample synthesized at temperature of 200 °C, specific capacitance of 750 F/g which negligibly depend on sweep rate in 5–500 mV/s range. 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 highly-ordered prismatic agglomerate sheets are observed for sample synthesized at temperature 200 °C .These findings are quite unusual for this kind of material consisted of rather large particles [1], and makes it excellent candidate for both low and high power applications",
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 Crystalline Ruo2 Supercapacitor Materials",
pages = "228-228",
url = "https://hdl.handle.net/21.15107/rcub_cer_3554"
}

Šekularac, G., Dekanski, A., Košević, M.,& Panić, V.. (2015). Microwave Synthesis of Crystalline Ruo2 Supercapacitor Materials. 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., 228-228.
https://hdl.handle.net/21.15107/rcub_cer_3554

Šekularac G, Dekanski A, Košević M, Panić V. Microwave Synthesis of Crystalline Ruo2 Supercapacitor Materials. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:228-228.
https://hdl.handle.net/21.15107/rcub_cer_3554 .

Šekularac, Gavrilo, Dekanski, Aleksandar, Košević, Milica, Panić, Vladimir, "Microwave Synthesis of Crystalline Ruo2 Supercapacitor Materials" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):228-228,
https://hdl.handle.net/21.15107/rcub_cer_3554 .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Nikolić, Jasmina B.
AU  - Petrović, Predrag
AU  - Bugarski, Branko
AU  - Durovic, Boban
AU  - Drmanić, Saša Ž.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1477
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  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives
VL  - 79
IS  - 11
SP  - 1347
EP  - 1354
DO  - 10.2298/JSC140709084S
ER  - 

@article{
author = "Šekularac, Gavrilo and Nikolić, Jasmina B. and Petrović, Predrag and Bugarski, Branko and Durovic, Boban and Drmanić, Saša Ž.",
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 = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Synthesis, antimicrobial and antioxidative activity of some new isatin derivatives",
volume = "79",
number = "11",
pages = "1347-1354",
doi = "10.2298/JSC140709084S"
}

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

Šekularac G, Nikolić JB, Petrović P, Bugarski B, Durovic B, Drmanić SŽ. 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 B., Petrović, Predrag, Bugarski, Branko, Durovic, Boban, Drmanić, Saša Ž., "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 Ž.
AU  - Nikolić, J.
AU  - Šekularac, Gavrilo
AU  - Rankovic, B.
AU  - Jovanović, Bratislav Ž.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1541
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
VL  - 80
IS  - 6
SP  - 829
EP  - 834
DO  - 10.1007/s10812-014-9851-7
ER  - 

@article{
author = "Drmanić, Saša Ž. and Nikolić, J. and Šekularac, Gavrilo and Rankovic, B. 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",
volume = "80",
number = "6",
pages = "829-834",
doi = "10.1007/s10812-014-9851-7"
}

Drmanić, S. Ž., Nikolić, J., Šekularac, G., Rankovic, 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 SŽ, Nikolić J, Šekularac G, Rankovic 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 Ž., Nikolić, J., Šekularac, Gavrilo, Rankovic, B., 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  - CONF
AU  - Aćimović, Zagorka
AU  - Andrić, Ljubiša
AU  - Terzić, Anja
AU  - Šekularac, Gavrilo
AU  - Pavlović, Marko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7492
AB  - In this paper, results of investigation of casting technology of complex thin-wall copper alloy castings with accent on Lost Foam casting procedure are given. Phases of casting procedure were investigated, along with important process parameters and their influence on structure and properties of obtained castings. This technology enabled obtaining of the castings with complex construction and thin walls, and significant savings in casting procedure: expensive operations such are cleaning and machine processing of castings are minimized, while exploitation of metal is increased. Critical parameters of the process were investigated: casting temperature, types of refractory coatings, types of polymer models and their influence on formation of the structure. Results showed that new technology can be applied for obtaining of quality copper alloy castings which can be widely used in mechanical industry.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
PB  - University of Belgrade, Faculty of Technology and Metallurgy Belgrade (TMF)
C3  - First Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2013), Belgrade, Proceedings and Book of Abstracts, Belgrade, Serbia (23.05-25.05.2013)
T1  - Developement of Modern Technologies of Copper Alloys Casting
SP  - 274
EP  - 280
UR  - https://hdl.handle.net/21.15107/rcub_cer_7492
ER  - 

@conference{
author = "Aćimović, Zagorka and Andrić, Ljubiša and Terzić, Anja and Šekularac, Gavrilo and Pavlović, Marko",
year = "2013",
abstract = "In this paper, results of investigation of casting technology of complex thin-wall copper alloy castings with accent on Lost Foam casting procedure are given. Phases of casting procedure were investigated, along with important process parameters and their influence on structure and properties of obtained castings. This technology enabled obtaining of the castings with complex construction and thin walls, and significant savings in casting procedure: expensive operations such are cleaning and machine processing of castings are minimized, while exploitation of metal is increased. Critical parameters of the process were investigated: casting temperature, types of refractory coatings, types of polymer models and their influence on formation of the structure. Results showed that new technology can be applied for obtaining of quality copper alloy castings which can be widely used in mechanical industry.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES), University of Belgrade, Faculty of Technology and Metallurgy Belgrade (TMF)",
journal = "First Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2013), Belgrade, Proceedings and Book of Abstracts, Belgrade, Serbia (23.05-25.05.2013)",
title = "Developement of Modern Technologies of Copper Alloys Casting",
pages = "274-280",
url = "https://hdl.handle.net/21.15107/rcub_cer_7492"
}

Aćimović, Z., Andrić, L., Terzić, A., Šekularac, G.,& Pavlović, M.. (2013). Developement of Modern Technologies of Copper Alloys Casting. in First Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2013), Belgrade, Proceedings and Book of Abstracts, Belgrade, Serbia (23.05-25.05.2013)
Association of Metallurgical Engineers of Serbia (AMES)., 274-280.
https://hdl.handle.net/21.15107/rcub_cer_7492

Aćimović Z, Andrić L, Terzić A, Šekularac G, Pavlović M. Developement of Modern Technologies of Copper Alloys Casting. in First Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2013), Belgrade, Proceedings and Book of Abstracts, Belgrade, Serbia (23.05-25.05.2013). 2013;:274-280.
https://hdl.handle.net/21.15107/rcub_cer_7492 .

Aćimović, Zagorka, Andrić, Ljubiša, Terzić, Anja, Šekularac, Gavrilo, Pavlović, Marko, "Developement of Modern Technologies of Copper Alloys Casting" in First Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2013), Belgrade, Proceedings and Book of Abstracts, Belgrade, Serbia (23.05-25.05.2013) (2013):274-280,
https://hdl.handle.net/21.15107/rcub_cer_7492 .

TY  - JOUR
AU  - Drmanić, Saša Ž.
AU  - Nikolić, Jasmina B.
AU  - Marinković, Aleksandar D.
AU  - Šekularac, Gavrilo
AU  - Jovanović, Bratislav Ž.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1159
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 and Chemical Engineering Quarterly / CICEQ
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
VL  - 19
IS  - 3
SP  - 385
EP  - 388
DO  - 10.2298/CICEQ120326073D
ER  - 

@article{
author = "Drmanić, Saša Ž. and Nikolić, Jasmina B. and Marinković, Aleksandar D. 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 and Chemical Engineering Quarterly / CICEQ",
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",
volume = "19",
number = "3",
pages = "385-388",
doi = "10.2298/CICEQ120326073D"
}

Drmanić, S. Ž., Nikolić, J. B., Marinković, A. D., 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 and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 19(3), 385-388.
https://doi.org/10.2298/CICEQ120326073D

Drmanić SŽ, Nikolić JB, Marinković AD, 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 and Chemical Engineering Quarterly / CICEQ. 2013;19(3):385-388.
doi:10.2298/CICEQ120326073D .

Drmanić, Saša Ž., Nikolić, Jasmina B., Marinković, Aleksandar D., 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 and Chemical Engineering Quarterly / CICEQ, 19, no. 3 (2013):385-388,
https://doi.org/10.2298/CICEQ120326073D . .

TY  - CONF
AU  - Šekularac, Gavrilo
AU  - Terzić, Anja
AU  - Nikolić, Jasmina
AU  - Drmanić, Saša
AU  - Pavlović, Marko
AU  - Aćimović, Zagorka
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7491
AB  - In this paper, results of the investigation of the polymer materials for evaporate patterns and their application in the new casting method (EPC process) are presented. The basic characteristic of EPC process is that patterns and gating of moulds, made of polymers, stay in the cast till the liquid metal inflow. In contact with liquid metal, intensely, in relatively short time, polymer pattern is been decomposing and evaporating , accompanied by castings crystallization. In order to achieve qualitative and profitable castings production by the EPC process it is necessary to reach the balance in the system: evaporable polymer pattern-liquid metal-refractory coat-sandy cast in the phase of metal inflow, decomposition and evaporation of polymer pattern, formation and soldification of castings. Results of this investigation of this process relate on application of puffed polystyrene of various densities (kg/m3): 18, 20, 25. Application of lower density polymer (20 kg/m3) gave positive results on structure and properties of silumina castings obtained using this casting method.
PB  - Bor, Srbija : Tehnički fakultet Bor, Institut za rudarstvo i metalurgiju
C3  - 44rd International October Conference on Mining and Metallurgy, October 01–03, 2012, Bor, Serbia, Proceedings
T1  - Application of polymer materials for production of evaporative pattern and development of new casting process
SP  - 281
EP  - 284
UR  - https://hdl.handle.net/21.15107/rcub_cer_7491
ER  - 

@conference{
author = "Šekularac, Gavrilo and Terzić, Anja and Nikolić, Jasmina and Drmanić, Saša and Pavlović, Marko and Aćimović, Zagorka",
year = "2012",
abstract = "In this paper, results of the investigation of the polymer materials for evaporate patterns and their application in the new casting method (EPC process) are presented. The basic characteristic of EPC process is that patterns and gating of moulds, made of polymers, stay in the cast till the liquid metal inflow. In contact with liquid metal, intensely, in relatively short time, polymer pattern is been decomposing and evaporating , accompanied by castings crystallization. In order to achieve qualitative and profitable castings production by the EPC process it is necessary to reach the balance in the system: evaporable polymer pattern-liquid metal-refractory coat-sandy cast in the phase of metal inflow, decomposition and evaporation of polymer pattern, formation and soldification of castings. Results of this investigation of this process relate on application of puffed polystyrene of various densities (kg/m3): 18, 20, 25. Application of lower density polymer (20 kg/m3) gave positive results on structure and properties of silumina castings obtained using this casting method.",
publisher = "Bor, Srbija : Tehnički fakultet Bor, Institut za rudarstvo i metalurgiju",
journal = "44rd International October Conference on Mining and Metallurgy, October 01–03, 2012, Bor, Serbia, Proceedings",
title = "Application of polymer materials for production of evaporative pattern and development of new casting process",
pages = "281-284",
url = "https://hdl.handle.net/21.15107/rcub_cer_7491"
}

Šekularac, G., Terzić, A., Nikolić, J., Drmanić, S., Pavlović, M.,& Aćimović, Z.. (2012). Application of polymer materials for production of evaporative pattern and development of new casting process. in 44rd International October Conference on Mining and Metallurgy, October 01–03, 2012, Bor, Serbia, Proceedings
Bor, Srbija : Tehnički fakultet Bor, Institut za rudarstvo i metalurgiju., 281-284.
https://hdl.handle.net/21.15107/rcub_cer_7491

Šekularac G, Terzić A, Nikolić J, Drmanić S, Pavlović M, Aćimović Z. Application of polymer materials for production of evaporative pattern and development of new casting process. in 44rd International October Conference on Mining and Metallurgy, October 01–03, 2012, Bor, Serbia, Proceedings. 2012;:281-284.
https://hdl.handle.net/21.15107/rcub_cer_7491 .

Šekularac, Gavrilo, Terzić, Anja, Nikolić, Jasmina, Drmanić, Saša, Pavlović, Marko, Aćimović, Zagorka, "Application of polymer materials for production of evaporative pattern and development of new casting process" in 44rd International October Conference on Mining and Metallurgy, October 01–03, 2012, Bor, Serbia, Proceedings (2012):281-284,
https://hdl.handle.net/21.15107/rcub_cer_7491 .