TY  - JOUR
AU  - Pavlović, Marko
AU  - Nikolić, Jasmina
AU  - Andrić, Ljubisa
AU  - Todorović, Dejan
AU  - Božić, Katarina
AU  - Drmanić, Saša
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5250
AB  - This paper is focused on the preparation procedures, using a talc-based filler, to improve the rheologic properties of the lost foam refractory coatings. Talc, with grain size of 40 .m, was mechanically activated in a vibration mill over the following times: 10, 20 and 30 min. Depending on the time required for the mechanical activation, the change in the filler grain size and shape was analysed along their effects on the talc-filled lost foam coating dispersion ability and stability. In order to characterize the filler, the following methods were used: X-ray diffraction, scanning electron microscopy and optic microscopy. The coating composition was tuned by choosing the suitable grain size and shape factor of the activated filler. In addition, different coating components (additives, solvent) were applied to alter the coating generation procedure. It was shown that the application of this type of the lost foam refractory coatings - water-based coatings - have a positive influence on quality of the aluminium alloy castings, which contributes to reducing the cost of cleaning and processing of the castings. Also, alcohol-based refractory coatings with talc-based activated fillers were tested and used to have the castings produced in the sand moulds.
AB  - Истраживање је фокусирано на поступке припреме пуниоца на бази талка у циљу побољшања реолошких својстава “lost foam” ватросталних премаза. Талк величине зрна од 40 m механички је активиран у вибрационом млину у временима од 10, 20 и 30 min.  У зависности од времена механичке активације, анализирана је промена величине и облика зрна пуниоца заједно са њиховим утицајем на дисперзност и стабилност суспензије премаза. За карактеризацију пуниоца коришћене су следеће методе: рендгенска дифракциона анализа, скенинг електронска и оптичка микорскопија. Испитиван је утицај састава премаза избором подесне величине и облика зрна активираног пуниоца на квалитет премаза. Осим тога, примењене су различите компоненте премаза и измењен је поступак израде премаза. Показано је да је примена ове врсте “lost foam” ватросталних премаза на воденој основи имала позитиван утицај на квалитет одливака од легура алуминијума. Такође, тестирани су ватростални премази на бази алкохола са активираним пуниоцем на бази талка који су коришћени за ливење одливака у калупе од песка.
T2  - Journal of the Serbian Chemical Society
T1  - Synthesis of the new lost foam refractory coatings based on talc
T1  - Синтеза нових “lost foam” ватросталних премаза на бази талка
VL  - 87
IS  - 4
SP  - 491
EP  - 503
DO  - 10.2298/JSC211019111P
ER  - 

@article{
author = "Pavlović, Marko and Nikolić, Jasmina and Andrić, Ljubisa and Todorović, Dejan and Božić, Katarina and Drmanić, Saša",
year = "2022",
abstract = "This paper is focused on the preparation procedures, using a talc-based filler, to improve the rheologic properties of the lost foam refractory coatings. Talc, with grain size of 40 .m, was mechanically activated in a vibration mill over the following times: 10, 20 and 30 min. Depending on the time required for the mechanical activation, the change in the filler grain size and shape was analysed along their effects on the talc-filled lost foam coating dispersion ability and stability. In order to characterize the filler, the following methods were used: X-ray diffraction, scanning electron microscopy and optic microscopy. The coating composition was tuned by choosing the suitable grain size and shape factor of the activated filler. In addition, different coating components (additives, solvent) were applied to alter the coating generation procedure. It was shown that the application of this type of the lost foam refractory coatings - water-based coatings - have a positive influence on quality of the aluminium alloy castings, which contributes to reducing the cost of cleaning and processing of the castings. Also, alcohol-based refractory coatings with talc-based activated fillers were tested and used to have the castings produced in the sand moulds., Истраживање је фокусирано на поступке припреме пуниоца на бази талка у циљу побољшања реолошких својстава “lost foam” ватросталних премаза. Талк величине зрна од 40 m механички је активиран у вибрационом млину у временима од 10, 20 и 30 min.  У зависности од времена механичке активације, анализирана је промена величине и облика зрна пуниоца заједно са њиховим утицајем на дисперзност и стабилност суспензије премаза. За карактеризацију пуниоца коришћене су следеће методе: рендгенска дифракциона анализа, скенинг електронска и оптичка микорскопија. Испитиван је утицај састава премаза избором подесне величине и облика зрна активираног пуниоца на квалитет премаза. Осим тога, примењене су различите компоненте премаза и измењен је поступак израде премаза. Показано је да је примена ове врсте “lost foam” ватросталних премаза на воденој основи имала позитиван утицај на квалитет одливака од легура алуминијума. Такође, тестирани су ватростални премази на бази алкохола са активираним пуниоцем на бази талка који су коришћени за ливење одливака у калупе од песка.",
journal = "Journal of the Serbian Chemical Society",
title = "Synthesis of the new lost foam refractory coatings based on talc, Синтеза нових “lost foam” ватросталних премаза на бази талка",
volume = "87",
number = "4",
pages = "491-503",
doi = "10.2298/JSC211019111P"
}

Pavlović, M., Nikolić, J., Andrić, L., Todorović, D., Božić, K.,& Drmanić, S.. (2022). Synthesis of the new lost foam refractory coatings based on talc. in Journal of the Serbian Chemical Society, 87(4), 491-503.
https://doi.org/10.2298/JSC211019111P

Pavlović M, Nikolić J, Andrić L, Todorović D, Božić K, Drmanić S. Synthesis of the new lost foam refractory coatings based on talc. in Journal of the Serbian Chemical Society. 2022;87(4):491-503.
doi:10.2298/JSC211019111P .

Pavlović, Marko, Nikolić, Jasmina, Andrić, Ljubisa, Todorović, Dejan, Božić, Katarina, Drmanić, Saša, "Synthesis of the new lost foam refractory coatings based on talc" in Journal of the Serbian Chemical Society, 87, no. 4 (2022):491-503,
https://doi.org/10.2298/JSC211019111P . .

TY  - CONF
AU  - Nikolić, Jasmina
AU  - Božić, Katarina
AU  - Kuburović, Nataša
AU  - Drmanić, Saša
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6517
AB  - Supstituisani estri 1,4-dihidropiridina (1,4-DHP) nastaju u reakciji etil-acetoacetata i odgovarajućih supstituisanih aldehida u prisustvu amonijaka. Nastali estri sa primarnim aminima formiraju amide. Serija amida nastalih od navednih jedinjenja je sintetisana sa namerom da se ispitaju njihove karakteristike i antioksidativna aktivnost. U ovde prikazanom istraživanju za aminolizu upotrebljen je 2-aminotiazol. Antioksidativna aktivnost je ispitivana DPPH (2,2-difenil-1-pikrilhidrazil-radikal) i ABTS (2,2'-azino-bis(3-etilbenzotiazolin-6-sulfonska kiselina)) metodama, a pored toga određene su tačke topljenje, snimljeni IR spektri i izvršena je elementalna analiza.
AB  - The substituted esters of 1,4-dihydropyirdines (1,4-DHP) are formed in the reaction of ethyl acetoacetate and corresponding substituted aldehydes in the presence of ammonia. Amides form from esters of substituted 1,4-DHP by aminolysis employing primary amines. A series of amides of the mentioned compounds was synthesized with the aim to analyze their chemical properties and antioxidative activity. The amine used in the present research was 2-aminothiazole. The antioxidative activity was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl radical) and ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) methods; melting points and IR were measured and elemental analysis was performed.
PB  - Beograd, Srbija : Srpsko hemijsko društvo
C3  - Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia
T1  - Sinteza, karakterizacija i antioksidativna aktivnost proizvoda aminolize Hančovih dihidropiridina
T1  - Synthesis, characterization and antioxidative activity of aminolysis products of Hantzsch dihydropyridines
SP  - 140
EP  - 140
UR  - https://hdl.handle.net/21.15107/rcub_cer_6517
ER  - 

@conference{
author = "Nikolić, Jasmina and Božić, Katarina and Kuburović, Nataša and Drmanić, Saša",
year = "2022",
abstract = "Supstituisani estri 1,4-dihidropiridina (1,4-DHP) nastaju u reakciji etil-acetoacetata i odgovarajućih supstituisanih aldehida u prisustvu amonijaka. Nastali estri sa primarnim aminima formiraju amide. Serija amida nastalih od navednih jedinjenja je sintetisana sa namerom da se ispitaju njihove karakteristike i antioksidativna aktivnost. U ovde prikazanom istraživanju za aminolizu upotrebljen je 2-aminotiazol. Antioksidativna aktivnost je ispitivana DPPH (2,2-difenil-1-pikrilhidrazil-radikal) i ABTS (2,2'-azino-bis(3-etilbenzotiazolin-6-sulfonska kiselina)) metodama, a pored toga određene su tačke topljenje, snimljeni IR spektri i izvršena je elementalna analiza., The substituted esters of 1,4-dihydropyirdines (1,4-DHP) are formed in the reaction of ethyl acetoacetate and corresponding substituted aldehydes in the presence of ammonia. Amides form from esters of substituted 1,4-DHP by aminolysis employing primary amines. A series of amides of the mentioned compounds was synthesized with the aim to analyze their chemical properties and antioxidative activity. The amine used in the present research was 2-aminothiazole. The antioxidative activity was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl radical) and ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) methods; melting points and IR were measured and elemental analysis was performed.",
publisher = "Beograd, Srbija : Srpsko hemijsko društvo",
journal = "Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia",
title = "Sinteza, karakterizacija i antioksidativna aktivnost proizvoda aminolize Hančovih dihidropiridina, Synthesis, characterization and antioxidative activity of aminolysis products of Hantzsch dihydropyridines",
pages = "140-140",
url = "https://hdl.handle.net/21.15107/rcub_cer_6517"
}

Nikolić, J., Božić, K., Kuburović, N.,& Drmanić, S.. (2022). Sinteza, karakterizacija i antioksidativna aktivnost proizvoda aminolize Hančovih dihidropiridina. in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia
Beograd, Srbija : Srpsko hemijsko društvo., 140-140.
https://hdl.handle.net/21.15107/rcub_cer_6517

Nikolić J, Božić K, Kuburović N, Drmanić S. Sinteza, karakterizacija i antioksidativna aktivnost proizvoda aminolize Hančovih dihidropiridina. in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia. 2022;:140-140.
https://hdl.handle.net/21.15107/rcub_cer_6517 .

Nikolić, Jasmina, Božić, Katarina, Kuburović, Nataša, Drmanić, Saša, "Sinteza, karakterizacija i antioksidativna aktivnost proizvoda aminolize Hančovih dihidropiridina" in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia (2022):140-140,
https://hdl.handle.net/21.15107/rcub_cer_6517 .

TY  - CONF
AU  - Drmanić, Saša
AU  - Božić, Katarina
AU  - Marojević, Andrijana
AU  - Nikolić, Jasmina
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6516
AB  - Izvršena je sinteza četiri 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona i to: 1,3-dihidro-3-[(fenilmetil)imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-brom-(fenilmetil)imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-hidroksi-(fenilmetil) imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-metoksi-(fenilmetil)imino]-2H-indol-2-ona, kao i jedinjenja slične strukture, 1,3-dihidro-3-[(2-feniletil)imino]-2H-indol-2-ona. Urađena je karakterizacija sintetisanih jedinjenja primenom FTIR spektroskopije, određivanjem temperature topljenja i elementalnom analizom, nakon čega je izvršeno ispitivanje antioksidativne aktivnosti svih pet jedinjenja. Antioksidativna aktivnost je određena primenom DPPH (1,1-difenil-2-pikril-hidrazil radikal) metode, u cilju određivanja najefikasinijeg jedinjenja od značaja za dalje istraživanje.
AB  - The synthesis of 1,3-dihydro-3-[4-substituted-(phenylmethyl)imino]-2H-indole-2-ones: 1,3-dihydro-3-[(phenylmethyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-bromo-(phenylmethyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-hydroxy-phenyl-methyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-methoxy-(phenylmethyl)imino]-2H-indol-2-one, as well as of the compound of similar structure, 1,3-dihydro-3-[(2-phenylethyl)imino]-2H-indol-2-one, was performed. The characterization of the obtained five compounds was carried out using FTIR, melting points and elemental analysis. Their antioxydative activity was then tested by DPPH (2,2-diphenyl-1-picrylhydrazyl radical) method and the results were compared in order to determine the most efficient compound, significant for further research.
PB  - Beograd, Srbija : Srpsko hemijsko društvo
C3  - Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia
T1  - Sinteza, karakterizacija i antioksidativna aktivnost 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona
T1  - Synthesis, characterization and antioxidative activity of 1,3-dihydro-3-[4-substituted-(phenylmethyl)imino]-2H-indole-2-ones
SP  - 132
EP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_cer_6516
ER  - 

@conference{
author = "Drmanić, Saša and Božić, Katarina and Marojević, Andrijana and Nikolić, Jasmina",
year = "2022",
abstract = "Izvršena je sinteza četiri 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona i to: 1,3-dihidro-3-[(fenilmetil)imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-brom-(fenilmetil)imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-hidroksi-(fenilmetil) imino]-2H-indol-2-ona, 1,3-dihidro-3-[4-metoksi-(fenilmetil)imino]-2H-indol-2-ona, kao i jedinjenja slične strukture, 1,3-dihidro-3-[(2-feniletil)imino]-2H-indol-2-ona. Urađena je karakterizacija sintetisanih jedinjenja primenom FTIR spektroskopije, određivanjem temperature topljenja i elementalnom analizom, nakon čega je izvršeno ispitivanje antioksidativne aktivnosti svih pet jedinjenja. Antioksidativna aktivnost je određena primenom DPPH (1,1-difenil-2-pikril-hidrazil radikal) metode, u cilju određivanja najefikasinijeg jedinjenja od značaja za dalje istraživanje., The synthesis of 1,3-dihydro-3-[4-substituted-(phenylmethyl)imino]-2H-indole-2-ones: 1,3-dihydro-3-[(phenylmethyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-bromo-(phenylmethyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-hydroxy-phenyl-methyl)imino]-2H-indol-2-one, 1,3-dihydro-3-[4-methoxy-(phenylmethyl)imino]-2H-indol-2-one, as well as of the compound of similar structure, 1,3-dihydro-3-[(2-phenylethyl)imino]-2H-indol-2-one, was performed. The characterization of the obtained five compounds was carried out using FTIR, melting points and elemental analysis. Their antioxydative activity was then tested by DPPH (2,2-diphenyl-1-picrylhydrazyl radical) method and the results were compared in order to determine the most efficient compound, significant for further research.",
publisher = "Beograd, Srbija : Srpsko hemijsko društvo",
journal = "Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia",
title = "Sinteza, karakterizacija i antioksidativna aktivnost 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona, Synthesis, characterization and antioxidative activity of 1,3-dihydro-3-[4-substituted-(phenylmethyl)imino]-2H-indole-2-ones",
pages = "132-132",
url = "https://hdl.handle.net/21.15107/rcub_cer_6516"
}

Drmanić, S., Božić, K., Marojević, A.,& Nikolić, J.. (2022). Sinteza, karakterizacija i antioksidativna aktivnost 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona. in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia
Beograd, Srbija : Srpsko hemijsko društvo., 132-132.
https://hdl.handle.net/21.15107/rcub_cer_6516

Drmanić S, Božić K, Marojević A, Nikolić J. Sinteza, karakterizacija i antioksidativna aktivnost 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona. in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia. 2022;:132-132.
https://hdl.handle.net/21.15107/rcub_cer_6516 .

Drmanić, Saša, Božić, Katarina, Marojević, Andrijana, Nikolić, Jasmina, "Sinteza, karakterizacija i antioksidativna aktivnost 1,3-dihidro-3-[4-supstituisanih-(fenilmetil)imino]-2H-indol-2-ona" in Kratki izvodi radova, knjiga radova - 58. Savetovanje Srpskog hemijskog društva, 9. i 10. jun, Beograd, Srbija / Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, June 9-10, Belgrade, Serbia (2022):132-132,
https://hdl.handle.net/21.15107/rcub_cer_6516 .

TY  - JOUR
AU  - Avramov Ivić, Milka
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Nikolić, Nebojša D.
AU  - Trišović, Nemanja
AU  - Lađarević, Jelena
AU  - Vuković, Dragan
AU  - Drmanić, Saša Ž.
AU  - Mladenović, Aleksandar R.
AU  - Jadranin, Milka
AU  - Petrović, Slobodan D.
AU  - Mijin, Dušan
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3062
AB  - Esomeprazole is the most effective of the proton-pump inhibitors for the acid-related diseases and at first was examined for the electroanalytical purposes. The drug standard and as a content of injection powder was investigated by cyclic voltammetry (CV) and quantitatively determined using square wave voltammetry (SWV) via its electrooxidation at Au electrode in 0.05 M NaHCO3. SWV showed a linear dependency of the anodic peak currents vs. esomeprazole standard concentrations in the range from 3.0 to 500 μg mL−1 with the values of limit of detection (LOD) and limit of quantification (LOQ): 1.4 and 4.6 μg mL−1, respectively. Using the constructed and validated calibration curve, the values of unknown esomeprazole concentrations in injection powder and in human serum spiked with standard were determined. Before the electrochemical oxidation, it was shown by atomic force microscopy (AFM) that the small esomeprazole islands formed inside holes were visible and their diameter was about 200 nm attributed to physico-chemical characteristics of esomeprazole. After the electrochemical oxidation, the morphology of esomeprazole standard on Au surface was completely changed and composed of spherical particles in a diameter between 200 and 600 nm. With esomeprazole suspended in human serum, the process of crystallization partly occurred in the form of spherical grains with the average size of these grains was about 4 μm. The analysis at the macro level done by the optical microscopy (OM) confirmed this opinion. The study of esomeprazole degradation showed that at Au electrode, after 3 h of cycling, a neglectable amount of the esomeprazole was changed. Using IrOx electrode under directed stress conditions, its almost complete degradation was realized after 3 h confirmed by high performance liquid chromatography (HPLC). Total organic carbon (TOC) analysis showed that 95% of esomeprazole was mineralized. The HPLC and Liquid chromatography-mass spectrometry (LC-MS) study revealed the formation of 4-hydroxy omeprazole sulphide, 4-hydroxy omeprazole sulphone, esomeprazole sulphone and methylated esomeprazole.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation
VL  - 848
SP  - 113303
DO  - 10.1016/j.jelechem.2019.113303
ER  - 

@article{
author = "Avramov Ivić, Milka and Lović, Jelena and Stevanović, Sanja and Nikolić, Nebojša D. and Trišović, Nemanja and Lađarević, Jelena and Vuković, Dragan and Drmanić, Saša Ž. and Mladenović, Aleksandar R. and Jadranin, Milka and Petrović, Slobodan D. and Mijin, Dušan",
year = "2019",
abstract = "Esomeprazole is the most effective of the proton-pump inhibitors for the acid-related diseases and at first was examined for the electroanalytical purposes. The drug standard and as a content of injection powder was investigated by cyclic voltammetry (CV) and quantitatively determined using square wave voltammetry (SWV) via its electrooxidation at Au electrode in 0.05 M NaHCO3. SWV showed a linear dependency of the anodic peak currents vs. esomeprazole standard concentrations in the range from 3.0 to 500 μg mL−1 with the values of limit of detection (LOD) and limit of quantification (LOQ): 1.4 and 4.6 μg mL−1, respectively. Using the constructed and validated calibration curve, the values of unknown esomeprazole concentrations in injection powder and in human serum spiked with standard were determined. Before the electrochemical oxidation, it was shown by atomic force microscopy (AFM) that the small esomeprazole islands formed inside holes were visible and their diameter was about 200 nm attributed to physico-chemical characteristics of esomeprazole. After the electrochemical oxidation, the morphology of esomeprazole standard on Au surface was completely changed and composed of spherical particles in a diameter between 200 and 600 nm. With esomeprazole suspended in human serum, the process of crystallization partly occurred in the form of spherical grains with the average size of these grains was about 4 μm. The analysis at the macro level done by the optical microscopy (OM) confirmed this opinion. The study of esomeprazole degradation showed that at Au electrode, after 3 h of cycling, a neglectable amount of the esomeprazole was changed. Using IrOx electrode under directed stress conditions, its almost complete degradation was realized after 3 h confirmed by high performance liquid chromatography (HPLC). Total organic carbon (TOC) analysis showed that 95% of esomeprazole was mineralized. The HPLC and Liquid chromatography-mass spectrometry (LC-MS) study revealed the formation of 4-hydroxy omeprazole sulphide, 4-hydroxy omeprazole sulphone, esomeprazole sulphone and methylated esomeprazole.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation",
volume = "848",
pages = "113303",
doi = "10.1016/j.jelechem.2019.113303"
}

Avramov Ivić, M., Lović, J., Stevanović, S., Nikolić, N. D., Trišović, N., Lađarević, J., Vuković, D., Drmanić, S. Ž., Mladenović, A. R., Jadranin, M., Petrović, S. D.,& Mijin, D.. (2019). Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation. in Journal of Electroanalytical Chemistry
Elsevier., 848, 113303.
https://doi.org/10.1016/j.jelechem.2019.113303

Avramov Ivić M, Lović J, Stevanović S, Nikolić ND, Trišović N, Lađarević J, Vuković D, Drmanić SŽ, Mladenović AR, Jadranin M, Petrović SD, Mijin D. Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation. in Journal of Electroanalytical Chemistry. 2019;848:113303.
doi:10.1016/j.jelechem.2019.113303 .

Avramov Ivić, Milka, Lović, Jelena, Stevanović, Sanja, Nikolić, Nebojša D., Trišović, Nemanja, Lađarević, Jelena, Vuković, Dragan, Drmanić, Saša Ž., Mladenović, Aleksandar R., Jadranin, Milka, Petrović, Slobodan D., Mijin, Dušan, "Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation" in Journal of Electroanalytical Chemistry, 848 (2019):113303,
https://doi.org/10.1016/j.jelechem.2019.113303 . .

TY  - JOUR
AU  - Budimirovic, Dragoslav
AU  - Veličković, Zlate S.
AU  - Bajic, Zoran
AU  - Milošević, Dragana
AU  - Nikolić, Jasmina B.
AU  - Drmanić, Saša Ž.
AU  - Marinković, Aleksandar D.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2123
AB  - The multistage synthesis of the multi-wall carbon nanotubes (MWCNT) modified with polyamidoamine dendrimers, A1/and A2/MWCNT, capable of cation removal, is presented in this work, as well as novel adsorbents based on these precursor materials and modified with goethite nano-deposit, alpha-FeOOH, A1/ and A2/MWCNT-alpha-FeO(OH) adsorbents used for As(V) removal. In a batch test, the influence of pH, contact time, initial ion concentration and temperature on adsorption efficiency were studied. Adsorption data modelling by the Langmuir isotherm, revealed good adsorption capacities (in mg g(-1)) of 18.8 for As(V) and 60.1 and 44.2 for Pb2+ and Cd2+ on A2/MWCNT, respectively. Also, 27.6 and 29.8 mg g(-1) of As(V) on A1/ and A2/MWCNT-alpha-FeO(OH), respectively, were removed. Thermodynamic parameters showed that the adsorption is spontaneous and endothermic processes. Results of the study of influences of competitive ions: bicarbonate, sulfate, phosphate, silicate, chromate, fluoride and natural organic matter (NOM), i.e., humic acid (HA), showed the highest effect of phosphate on the decrease of arsenate adsorption. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber-Morris model which predicted intra-particle diffusion as a rate-controlling step. Also, activation energy (E-a/kJ mol(-1)): 8.85 for Cd2+, 9.25 for Pb2+ and 7.98 for As(V), were obtained from kinetic data.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes
VL  - 82
IS  - 10
SP  - 1175
EP  - 1191
DO  - 10.2298/JSC170422066B
ER  - 

@article{
author = "Budimirovic, Dragoslav and Veličković, Zlate S. and Bajic, Zoran and Milošević, Dragana and Nikolić, Jasmina B. and Drmanić, Saša Ž. and Marinković, Aleksandar D.",
year = "2017",
abstract = "The multistage synthesis of the multi-wall carbon nanotubes (MWCNT) modified with polyamidoamine dendrimers, A1/and A2/MWCNT, capable of cation removal, is presented in this work, as well as novel adsorbents based on these precursor materials and modified with goethite nano-deposit, alpha-FeOOH, A1/ and A2/MWCNT-alpha-FeO(OH) adsorbents used for As(V) removal. In a batch test, the influence of pH, contact time, initial ion concentration and temperature on adsorption efficiency were studied. Adsorption data modelling by the Langmuir isotherm, revealed good adsorption capacities (in mg g(-1)) of 18.8 for As(V) and 60.1 and 44.2 for Pb2+ and Cd2+ on A2/MWCNT, respectively. Also, 27.6 and 29.8 mg g(-1) of As(V) on A1/ and A2/MWCNT-alpha-FeO(OH), respectively, were removed. Thermodynamic parameters showed that the adsorption is spontaneous and endothermic processes. Results of the study of influences of competitive ions: bicarbonate, sulfate, phosphate, silicate, chromate, fluoride and natural organic matter (NOM), i.e., humic acid (HA), showed the highest effect of phosphate on the decrease of arsenate adsorption. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber-Morris model which predicted intra-particle diffusion as a rate-controlling step. Also, activation energy (E-a/kJ mol(-1)): 8.85 for Cd2+, 9.25 for Pb2+ and 7.98 for As(V), were obtained from kinetic data.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes",
volume = "82",
number = "10",
pages = "1175-1191",
doi = "10.2298/JSC170422066B"
}

Budimirovic, D., Veličković, Z. S., Bajic, Z., Milošević, D., Nikolić, J. B., Drmanić, S. Ž.,& Marinković, A. D.. (2017). Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 82(10), 1175-1191.
https://doi.org/10.2298/JSC170422066B

Budimirovic D, Veličković ZS, Bajic Z, Milošević D, Nikolić JB, Drmanić SŽ, Marinković AD. Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes. in Journal of the Serbian Chemical Society. 2017;82(10):1175-1191.
doi:10.2298/JSC170422066B .

Budimirovic, Dragoslav, Veličković, Zlate S., Bajic, Zoran, Milošević, Dragana, Nikolić, Jasmina B., Drmanić, Saša Ž., Marinković, Aleksandar D., "Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes" in Journal of the Serbian Chemical Society, 82, no. 10 (2017):1175-1191,
https://doi.org/10.2298/JSC170422066B . .

TY  - JOUR
AU  - Božić, Aleksandra R.
AU  - Filipovic, Nenad R.
AU  - Novaković, Irena
AU  - Bjelogrlić, Snežana K.
AU  - Nikolić, Jasmina B.
AU  - Drmanić, Saša Ž.
AU  - Marinković, Aleksandar D.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2130
AB  - Fourteen mono- and bis-carbohydrazone ligands have been synthesized and characterized. Antioxidant activity of the substances was investigated together with possible (E)/(Z) isomerization, and explained on the most active antioxidant compound 4 in various dimethyl sulphoxide-water mixtures. The addition of water to the system was involved in the formation of hydrated molecules which was confirmed in NMR after the addition of D2O. The ligands were tested in vitro against Gram-positive and Gram-negative bacteria and fungi, and their activity was discussed in relation to the structure of investigated carbohydrazone.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Synthesis, antioxidant and antimicrobial activity of carbohydrazones
VL  - 82
IS  - 5
SP  - 495
EP  - 508
DO  - 10.2298/JSC161220045B
ER  - 

@article{
author = "Božić, Aleksandra R. and Filipovic, Nenad R. and Novaković, Irena and Bjelogrlić, Snežana K. and Nikolić, Jasmina B. and Drmanić, Saša Ž. and Marinković, Aleksandar D.",
year = "2017",
abstract = "Fourteen mono- and bis-carbohydrazone ligands have been synthesized and characterized. Antioxidant activity of the substances was investigated together with possible (E)/(Z) isomerization, and explained on the most active antioxidant compound 4 in various dimethyl sulphoxide-water mixtures. The addition of water to the system was involved in the formation of hydrated molecules which was confirmed in NMR after the addition of D2O. The ligands were tested in vitro against Gram-positive and Gram-negative bacteria and fungi, and their activity was discussed in relation to the structure of investigated carbohydrazone.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Synthesis, antioxidant and antimicrobial activity of carbohydrazones",
volume = "82",
number = "5",
pages = "495-508",
doi = "10.2298/JSC161220045B"
}

Božić, A. R., Filipovic, N. R., Novaković, I., Bjelogrlić, S. K., Nikolić, J. B., Drmanić, S. Ž.,& Marinković, A. D.. (2017). Synthesis, antioxidant and antimicrobial activity of carbohydrazones. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 82(5), 495-508.
https://doi.org/10.2298/JSC161220045B

Božić AR, Filipovic NR, Novaković I, Bjelogrlić SK, Nikolić JB, Drmanić SŽ, Marinković AD. Synthesis, antioxidant and antimicrobial activity of carbohydrazones. in Journal of the Serbian Chemical Society. 2017;82(5):495-508.
doi:10.2298/JSC161220045B .

Božić, Aleksandra R., Filipovic, Nenad R., Novaković, Irena, Bjelogrlić, Snežana K., Nikolić, Jasmina B., Drmanić, Saša Ž., Marinković, Aleksandar D., "Synthesis, antioxidant and antimicrobial activity of carbohydrazones" in Journal of the Serbian Chemical Society, 82, no. 5 (2017):495-508,
https://doi.org/10.2298/JSC161220045B . .

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  - 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  - JOUR
AU  - Mladenović, Aleksandar R.
AU  - Jadranin, Milka
AU  - Pavlović, Aleksandar D.
AU  - Petrović, Slobodan D.
AU  - Drmanić, Saša Ž.
AU  - Avramov Ivić, Milka
AU  - Mijin, Dušan
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1731
AB  - This study describes the investigation of degradation products of donepezil (DP) using a stability-indicating RP-HPLC method for determination of donepezil, which is a centrally acting reversible acetyl cholinesterase inhibitor. In order to investigate the stability of the drug and formed degradation products, a forced degradation study of the drug sample and finished product under different forced degradation conditions was conducted. Donepezil hydrochloride and donepezil tablets were subjected to stress degradation conditions recommended by the International Conference on Harmonization (ICH). Donepezil hydrochloride solutions were subjected to acid and alkali hydrolysis, chemical oxidation and thermal degradation. Significant degradation was observed under alkali hydrolysis and oxidative degradation conditions. Additional degradation products were observed under the conditions of oxidative degradation. The degradation products observed during forced degradation studies were monitored using the developed high performance liquid chromatography (HPLC) method. The parent method was modified in order to obtain LC-MS compatible method, which was used to identify the degradation products from forced degradation samples using high resolution mass spectrometry. The mass spectrum provided the precise mass from which the molecular formula of the drug substance and formed degradation products was derived, and proved the specificity of the method unambiguously.
AB  - Proučavanje degradacionih proizvoda donepezila je izvršeno korišćenjem RP-HPLC metode za određivanje stabilnosti donepezila, leka koji pripada grupi reverzibilnih inhibitora acetilholinesteraze. U cilju ispitivanja stabilnosti leka i njegovih degradacionih proizvoda sprovedena je studija forsirane degradacije čiste supstance kao i farmaceutskog proizvoda pod različitim uslovima. Donepezil-hidrohlorid i donepezil tablete su podvrgnuti različitim uslovima degradacije prema preporukama Internacionalne konferencije za harmonizaciju. Rastvori donepezil-hidrohlorida su podvrgnuti kiseloj i baznoj hidrolizi, hemijskoj oksidaciji i termalnoj degradaciji. Pri baznoj hidrolizi i hemijskoj oksidaciji uočena je značajna degradacija polaznog molekula. Oksidativnom degradacijom nastaju i proizvodi koji nisu uočeni kod ostalih postupaka forsirane degradacije. Nastali proizvodi analizirani su novorazvijenom HPLC metodom. Osnovna metoda je modifikovana u cilju dobijanja LC-MS kompatibilne metode kako bi se identifikovali nastali degradacioni proizvodi. Na osnovu resultata dobijenih masenom spektrometrijom dobijene su tačne mase proizvoda degradacije, čime je omogućeno određivanje njihovih molekulskih formula.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Liquid chromatography and liquid chromatography-mass spectrometry analysis of donepezil degradation products
T1  - Analiza degradacionih proizvoda donepezila primenom tečne hromatografije i tečne hromatografije-masene spektrometrije
VL  - 21
IS  - 3
SP  - 447
EP  - 455
DO  - 10.2298/CICEQ141023047M
ER  - 

@article{
author = "Mladenović, Aleksandar R. and Jadranin, Milka and Pavlović, Aleksandar D. and Petrović, Slobodan D. and Drmanić, Saša Ž. and Avramov Ivić, Milka and Mijin, Dušan",
year = "2015",
abstract = "This study describes the investigation of degradation products of donepezil (DP) using a stability-indicating RP-HPLC method for determination of donepezil, which is a centrally acting reversible acetyl cholinesterase inhibitor. In order to investigate the stability of the drug and formed degradation products, a forced degradation study of the drug sample and finished product under different forced degradation conditions was conducted. Donepezil hydrochloride and donepezil tablets were subjected to stress degradation conditions recommended by the International Conference on Harmonization (ICH). Donepezil hydrochloride solutions were subjected to acid and alkali hydrolysis, chemical oxidation and thermal degradation. Significant degradation was observed under alkali hydrolysis and oxidative degradation conditions. Additional degradation products were observed under the conditions of oxidative degradation. The degradation products observed during forced degradation studies were monitored using the developed high performance liquid chromatography (HPLC) method. The parent method was modified in order to obtain LC-MS compatible method, which was used to identify the degradation products from forced degradation samples using high resolution mass spectrometry. The mass spectrum provided the precise mass from which the molecular formula of the drug substance and formed degradation products was derived, and proved the specificity of the method unambiguously., Proučavanje degradacionih proizvoda donepezila je izvršeno korišćenjem RP-HPLC metode za određivanje stabilnosti donepezila, leka koji pripada grupi reverzibilnih inhibitora acetilholinesteraze. U cilju ispitivanja stabilnosti leka i njegovih degradacionih proizvoda sprovedena je studija forsirane degradacije čiste supstance kao i farmaceutskog proizvoda pod različitim uslovima. Donepezil-hidrohlorid i donepezil tablete su podvrgnuti različitim uslovima degradacije prema preporukama Internacionalne konferencije za harmonizaciju. Rastvori donepezil-hidrohlorida su podvrgnuti kiseloj i baznoj hidrolizi, hemijskoj oksidaciji i termalnoj degradaciji. Pri baznoj hidrolizi i hemijskoj oksidaciji uočena je značajna degradacija polaznog molekula. Oksidativnom degradacijom nastaju i proizvodi koji nisu uočeni kod ostalih postupaka forsirane degradacije. Nastali proizvodi analizirani su novorazvijenom HPLC metodom. Osnovna metoda je modifikovana u cilju dobijanja LC-MS kompatibilne metode kako bi se identifikovali nastali degradacioni proizvodi. Na osnovu resultata dobijenih masenom spektrometrijom dobijene su tačne mase proizvoda degradacije, čime je omogućeno određivanje njihovih molekulskih formula.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Liquid chromatography and liquid chromatography-mass spectrometry analysis of donepezil degradation products, Analiza degradacionih proizvoda donepezila primenom tečne hromatografije i tečne hromatografije-masene spektrometrije",
volume = "21",
number = "3",
pages = "447-455",
doi = "10.2298/CICEQ141023047M"
}

Mladenović, A. R., Jadranin, M., Pavlović, A. D., Petrović, S. D., Drmanić, S. Ž., Avramov Ivić, M.,& Mijin, D.. (2015). Liquid chromatography and liquid chromatography-mass spectrometry analysis of donepezil degradation products. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(3), 447-455.
https://doi.org/10.2298/CICEQ141023047M

Mladenović AR, Jadranin M, Pavlović AD, Petrović SD, Drmanić SŽ, Avramov Ivić M, Mijin D. Liquid chromatography and liquid chromatography-mass spectrometry analysis of donepezil degradation products. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(3):447-455.
doi:10.2298/CICEQ141023047M .

Mladenović, Aleksandar R., Jadranin, Milka, Pavlović, Aleksandar D., Petrović, Slobodan D., Drmanić, Saša Ž., Avramov Ivić, Milka, Mijin, Dušan, "Liquid chromatography and liquid chromatography-mass spectrometry analysis of donepezil degradation products" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 3 (2015):447-455,
https://doi.org/10.2298/CICEQ141023047M . .

TY  - JOUR
AU  - Mladenović, Aleksandar R.
AU  - Mijin, Dušan
AU  - Drmanić, Saša Ž.
AU  - Vajs, Vlatka
AU  - Jovanović, Vladislava M.
AU  - Petrović, Slobodan D.
AU  - Avramov Ivić, Milka
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1577
AB  - The oxidative ability of donepezil, a frequently prescribed drug for the treatment of Alzheimer's disease is reported for the first time at a gold electrode. It was oxidized by cyclic voltammetry and determined by square wave voltammetry in phosphate buffer electrolyte. Electrochemical degradation of donepezil was carried out by long term potential cycling. The identification and characterization of the major product, isolated by preparative high performance liquid chromatography, was performed by high resolution mass spectrometry and 1D and 2D nuclear magnetic resonance spectroscopy. Donepezil hydroxy derivative was identified as the major electrochemical oxidation product from donepezil.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode
VL  - 26
IS  - 5
SP  - 893
EP  - 897
DO  - 10.1002/elan.201400034
ER  - 

@article{
author = "Mladenović, Aleksandar R. and Mijin, Dušan and Drmanić, Saša Ž. and Vajs, Vlatka and Jovanović, Vladislava M. and Petrović, Slobodan D. and Avramov Ivić, Milka",
year = "2014",
abstract = "The oxidative ability of donepezil, a frequently prescribed drug for the treatment of Alzheimer's disease is reported for the first time at a gold electrode. It was oxidized by cyclic voltammetry and determined by square wave voltammetry in phosphate buffer electrolyte. Electrochemical degradation of donepezil was carried out by long term potential cycling. The identification and characterization of the major product, isolated by preparative high performance liquid chromatography, was performed by high resolution mass spectrometry and 1D and 2D nuclear magnetic resonance spectroscopy. Donepezil hydroxy derivative was identified as the major electrochemical oxidation product from donepezil.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode",
volume = "26",
number = "5",
pages = "893-897",
doi = "10.1002/elan.201400034"
}

Mladenović, A. R., Mijin, D., Drmanić, S. Ž., Vajs, V., Jovanović, V. M., Petrović, S. D.,& Avramov Ivić, M.. (2014). Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode. in Electroanalysis
Wiley-Blackwell, Malden., 26(5), 893-897.
https://doi.org/10.1002/elan.201400034

Mladenović AR, Mijin D, Drmanić SŽ, Vajs V, Jovanović VM, Petrović SD, Avramov Ivić M. Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode. in Electroanalysis. 2014;26(5):893-897.
doi:10.1002/elan.201400034 .

Mladenović, Aleksandar R., Mijin, Dušan, Drmanić, Saša Ž., Vajs, Vlatka, Jovanović, Vladislava M., Petrović, Slobodan D., Avramov Ivić, Milka, "Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode" in Electroanalysis, 26, no. 5 (2014):893-897,
https://doi.org/10.1002/elan.201400034 . .

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  - 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  - JOUR
AU  - Mladenović, Aleksandar R.
AU  - Jovanović, Vladislava M.
AU  - Petrović, Slobodan D.
AU  - Mijin, Dušan
AU  - Drmanić, Saša Ž.
AU  - Avramov Ivić, Milka
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1230
AB  - The determination of clopidogrel, an antiplatelet agent, was performed at a gold electrode in pH 3.7 acetate buffer using cyclic voltammetry (CV) and square wave voltammetry (SWV). Each voltammogram was characterized by the well defined peak at approximately 1.0 V. The current of anodic stripping peak exhibited a linear dependence on the clopidogrel concentration in the range from 317.89 to 935.16 μg cm-3. The obtained linearity was applied to determine clopidogrel in the tablet form of the pharmaceutical preparation (Plavix®). The results were compared to the UV spectrophotometric and HPLC methods. .
AB  - Klopidogrel je antitrombotski agens iz tijenopiridinske klase, koji se koristi za inhibiranje formiranja krvnih ugrušaka pri lečenju koronarne arterijske bolesti, periferne vaskularne bolesti, i cerebrovaskularne bolesti. Elektrohemijsko ponašanje klopidogrel standarda i kao sastojka tablete Plavix® je definisano cikličnom voltametrijom. Njihovo kvantitativno određivanje na elektrodi od zlata u acetatnom puferu, pH 3,7, urađeno je voltametrijom sa pravougaonim impulsima (SWV). Pokazano je obema tehnikama da je svaki voltamogram okarakterisan dobro definisanim strujnim vrhom na 1,0 V. Na osnovu linearne zavisnosti anodnih struja od koncentracije klopidogrel standarda određena je masa klopidogrela u Plavix® tableti. Dobijeni rezultati pokazuju da SWV tehnika može biti korišćena direktno, brzo i jednostavno za određivanje klopidogrela u tabletama. Rezultati dobijeni SWV voltametrijskom tehnikom su poređeni sa rezultatima analize klopidogrela UV spektrofotometrijom i tečnom hromatografijom sa visokim performansama. Analitički rezultati pokazuju da je masa aktivne supstance u tabletama Plavix® u okviru limita specifikovanog farmakopejom. To ukazuje da voltametrija sa pravougaonim impulsima može biti uspešna alternativa hromatografskim i spektrofotometrijskim metodama. .
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Determination of clopidogrel using square wave voltammetry at a gold electrode
T1  - Određivanje klopidogrela voltametrijom sa pravouglim impulsima na elektrodi od zlata
VL  - 78
IS  - 12
SP  - 2131
EP  - 2140
DO  - 10.2298/JSC130913116M
ER  - 

@article{
author = "Mladenović, Aleksandar R. and Jovanović, Vladislava M. and Petrović, Slobodan D. and Mijin, Dušan and Drmanić, Saša Ž. and Avramov Ivić, Milka",
year = "2013",
abstract = "The determination of clopidogrel, an antiplatelet agent, was performed at a gold electrode in pH 3.7 acetate buffer using cyclic voltammetry (CV) and square wave voltammetry (SWV). Each voltammogram was characterized by the well defined peak at approximately 1.0 V. The current of anodic stripping peak exhibited a linear dependence on the clopidogrel concentration in the range from 317.89 to 935.16 μg cm-3. The obtained linearity was applied to determine clopidogrel in the tablet form of the pharmaceutical preparation (Plavix®). The results were compared to the UV spectrophotometric and HPLC methods. ., Klopidogrel je antitrombotski agens iz tijenopiridinske klase, koji se koristi za inhibiranje formiranja krvnih ugrušaka pri lečenju koronarne arterijske bolesti, periferne vaskularne bolesti, i cerebrovaskularne bolesti. Elektrohemijsko ponašanje klopidogrel standarda i kao sastojka tablete Plavix® je definisano cikličnom voltametrijom. Njihovo kvantitativno određivanje na elektrodi od zlata u acetatnom puferu, pH 3,7, urađeno je voltametrijom sa pravougaonim impulsima (SWV). Pokazano je obema tehnikama da je svaki voltamogram okarakterisan dobro definisanim strujnim vrhom na 1,0 V. Na osnovu linearne zavisnosti anodnih struja od koncentracije klopidogrel standarda određena je masa klopidogrela u Plavix® tableti. Dobijeni rezultati pokazuju da SWV tehnika može biti korišćena direktno, brzo i jednostavno za određivanje klopidogrela u tabletama. Rezultati dobijeni SWV voltametrijskom tehnikom su poređeni sa rezultatima analize klopidogrela UV spektrofotometrijom i tečnom hromatografijom sa visokim performansama. Analitički rezultati pokazuju da je masa aktivne supstance u tabletama Plavix® u okviru limita specifikovanog farmakopejom. To ukazuje da voltametrija sa pravougaonim impulsima može biti uspešna alternativa hromatografskim i spektrofotometrijskim metodama. .",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Determination of clopidogrel using square wave voltammetry at a gold electrode, Određivanje klopidogrela voltametrijom sa pravouglim impulsima na elektrodi od zlata",
volume = "78",
number = "12",
pages = "2131-2140",
doi = "10.2298/JSC130913116M"
}

Mladenović, A. R., Jovanović, V. M., Petrović, S. D., Mijin, D., Drmanić, S. Ž.,& Avramov Ivić, M.. (2013). Determination of clopidogrel using square wave voltammetry at a gold electrode. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 78(12), 2131-2140.
https://doi.org/10.2298/JSC130913116M

Mladenović AR, Jovanović VM, Petrović SD, Mijin D, Drmanić SŽ, Avramov Ivić M. Determination of clopidogrel using square wave voltammetry at a gold electrode. in Journal of the Serbian Chemical Society. 2013;78(12):2131-2140.
doi:10.2298/JSC130913116M .

Mladenović, Aleksandar R., Jovanović, Vladislava M., Petrović, Slobodan D., Mijin, Dušan, Drmanić, Saša Ž., Avramov Ivić, Milka, "Determination of clopidogrel using square wave voltammetry at a gold electrode" in Journal of the Serbian Chemical Society, 78, no. 12 (2013):2131-2140,
https://doi.org/10.2298/JSC130913116M . .

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 .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Zrilić, Milorad
AU  - Stevanović, Jasmina
AU  - Drmanić, Saša Ž.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/951
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation
VL  - 7
IS  - 1
SP  - 269
EP  - 278
UR  - https://hdl.handle.net/21.15107/rcub_cer_951
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Zrilić, Milorad and Stevanović, Jasmina and Drmanić, Saša Ž.",
year = "2012",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation",
volume = "7",
number = "1",
pages = "269-278",
url = "https://hdl.handle.net/21.15107/rcub_cer_951"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stajić-Trošić, J., Zrilić, M., Stevanović, J.,& Drmanić, S. Ž.. (2012). The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 7(1), 269-278.
https://hdl.handle.net/21.15107/rcub_cer_951

Nedeljković D, Stajčić A, Grujić A, Stajić-Trošić J, Zrilić M, Stevanović J, Drmanić SŽ. The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures. 2012;7(1):269-278.
https://hdl.handle.net/21.15107/rcub_cer_951 .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Zrilić, Milorad, Stevanović, Jasmina, Drmanić, Saša Ž., "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation" in Digest Journal of Nanomaterials and Biostructures, 7, no. 1 (2012):269-278,
https://hdl.handle.net/21.15107/rcub_cer_951 .

TY  - JOUR
AU  - Jokić, Bojan
AU  - Drmanić, Saša Ž.
AU  - Radetić, Tamara
AU  - Krstić, Jugoslav
AU  - Petrovic, R.
AU  - Orlovic, A.
AU  - Janaćković, Đorđe
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/715
AB  - Submicron carbon spherical particles were obtained by polycondensation of resorcinol and formaldehyde in a solution and subsequent ultrasonic spray pyrolysis of the prepared sol. Microscopic characterization indicates the regular spherical shape of the obtained particles and sphere diameters in 200-700 nm range. The carbon spheres are amorphous as confirmed by electron diffraction, EELS, XRD and HREM characterization. Activation procedure was performed with H2O in a nitrogen flow for 15 and 30 min at 800 degrees C. The activation procedure preserved the initial spherical shapes of the particles while the particle porosity and specific surface area were increased. The amount of surface oxygen functionalities was also increased by activation procedure as indicated by FTIR analysis.
PB  - Elsevier
T2  - Materials Letters
T1  - Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method
VL  - 64
IS  - 20
SP  - 2173
EP  - 2176
DO  - 10.1016/j.matlet.2010.06.066
ER  - 

@article{
author = "Jokić, Bojan and Drmanić, Saša Ž. and Radetić, Tamara and Krstić, Jugoslav and Petrovic, R. and Orlovic, A. and Janaćković, Đorđe",
year = "2010",
abstract = "Submicron carbon spherical particles were obtained by polycondensation of resorcinol and formaldehyde in a solution and subsequent ultrasonic spray pyrolysis of the prepared sol. Microscopic characterization indicates the regular spherical shape of the obtained particles and sphere diameters in 200-700 nm range. The carbon spheres are amorphous as confirmed by electron diffraction, EELS, XRD and HREM characterization. Activation procedure was performed with H2O in a nitrogen flow for 15 and 30 min at 800 degrees C. The activation procedure preserved the initial spherical shapes of the particles while the particle porosity and specific surface area were increased. The amount of surface oxygen functionalities was also increased by activation procedure as indicated by FTIR analysis.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method",
volume = "64",
number = "20",
pages = "2173-2176",
doi = "10.1016/j.matlet.2010.06.066"
}

Jokić, B., Drmanić, S. Ž., Radetić, T., Krstić, J., Petrovic, R., Orlovic, A.,& Janaćković, Đ.. (2010). Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method. in Materials Letters
Elsevier., 64(20), 2173-2176.
https://doi.org/10.1016/j.matlet.2010.06.066

Jokić B, Drmanić SŽ, Radetić T, Krstić J, Petrovic R, Orlovic A, Janaćković Đ. Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method. in Materials Letters. 2010;64(20):2173-2176.
doi:10.1016/j.matlet.2010.06.066 .

Jokić, Bojan, Drmanić, Saša Ž., Radetić, Tamara, Krstić, Jugoslav, Petrovic, R., Orlovic, A., Janaćković, Đorđe, "Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method" in Materials Letters, 64, no. 20 (2010):2173-2176,
https://doi.org/10.1016/j.matlet.2010.06.066 . .

TY  - JOUR
AU  - Tanaskovic, N.
AU  - Radovanović, Z.
AU  - Dokic, V.
AU  - Krstić, Jugoslav
AU  - Drmanić, Saša Ž.
AU  - Janaćković, Đorđe
AU  - Petrovic, R.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/527
AB  - Mesoporous titania with well-crystallized anatase phase was synthesized by nonhydrolytic sol-gel process combined with solvothermal treatment. Titanium-isopropoxide, titanium-tetrachloride, and carbon-tetrachloride were used for synthesis under nitrogen atmosphere in a glove box. The obtained mixture was heated in an autoclave at 140 degrees C for 3 h and 30 h. XRD analysis showed that dry gels contained anatase phase with low crystallinity, while powders obtained by calcination of dry gels at 500 degrees C for 3 h consisted of pure anatase with high crystallinity. SEM analysis of dried gels and powders shows agglomerates of spherical particles of the size similar to 300 nm. The TEM micrographs confirmed the nanoscale size of the titania powders, with the primary particle size of about 20 nm. Titania powders exhibit maximum pore diameter of 13.2 nm and 9.5 nm for gelation time 3 h and 30 h, respectively. The photocatalytic activity of such synthesized titania is superior to that of commercial photocatalyst Degussa P-25.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Superlattices and Microstructures
T1  - Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method
VL  - 46
IS  - 1-2
SP  - 217
EP  - 222
DO  - 10.1016/j.spmi.2008.12.028
ER  - 

@article{
author = "Tanaskovic, N. and Radovanović, Z. and Dokic, V. and Krstić, Jugoslav and Drmanić, Saša Ž. and Janaćković, Đorđe and Petrovic, R.",
year = "2009",
abstract = "Mesoporous titania with well-crystallized anatase phase was synthesized by nonhydrolytic sol-gel process combined with solvothermal treatment. Titanium-isopropoxide, titanium-tetrachloride, and carbon-tetrachloride were used for synthesis under nitrogen atmosphere in a glove box. The obtained mixture was heated in an autoclave at 140 degrees C for 3 h and 30 h. XRD analysis showed that dry gels contained anatase phase with low crystallinity, while powders obtained by calcination of dry gels at 500 degrees C for 3 h consisted of pure anatase with high crystallinity. SEM analysis of dried gels and powders shows agglomerates of spherical particles of the size similar to 300 nm. The TEM micrographs confirmed the nanoscale size of the titania powders, with the primary particle size of about 20 nm. Titania powders exhibit maximum pore diameter of 13.2 nm and 9.5 nm for gelation time 3 h and 30 h, respectively. The photocatalytic activity of such synthesized titania is superior to that of commercial photocatalyst Degussa P-25.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Superlattices and Microstructures",
title = "Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method",
volume = "46",
number = "1-2",
pages = "217-222",
doi = "10.1016/j.spmi.2008.12.028"
}

Tanaskovic, N., Radovanović, Z., Dokic, V., Krstić, J., Drmanić, S. Ž., Janaćković, Đ.,& Petrovic, R.. (2009). Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method. in Superlattices and Microstructures
Academic Press Ltd- Elsevier Science Ltd, London., 46(1-2), 217-222.
https://doi.org/10.1016/j.spmi.2008.12.028

Tanaskovic N, Radovanović Z, Dokic V, Krstić J, Drmanić SŽ, Janaćković Đ, Petrovic R. Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method. in Superlattices and Microstructures. 2009;46(1-2):217-222.
doi:10.1016/j.spmi.2008.12.028 .

Tanaskovic, N., Radovanović, Z., Dokic, V., Krstić, Jugoslav, Drmanić, Saša Ž., Janaćković, Đorđe, Petrovic, R., "Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method" in Superlattices and Microstructures, 46, no. 1-2 (2009):217-222,
https://doi.org/10.1016/j.spmi.2008.12.028 . .

TY  - JOUR
AU  - Kuburović, Nataša
AU  - Todorović, Marija
AU  - Raičević, Vera
AU  - Orlović, Aleksandar
AU  - Jovanović, Ljubinko
AU  - Nikolić, Jasmina
AU  - Kuburović, Vladimir
AU  - Drmanić, Saša
AU  - Šolević, Tatjana
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5856
AB  - Contamination of groundwater by methyl tertiary butyl ether (MTBE), that is detected in wastewater of petrochemical industry, is an increasing problem to water supply companies. The subjects of this research were the methods of photolytic, photocatalytic and microbiological degradation of methyl tertiary butyl ether (MTBE) dissolved in wastewaters. The effects of concentrated solar radiation simulated with sodium lamp (SONT UV 400) have been investigated in laboratory experiments. Our result indicated that bacteria Pseudomonas strain CY, isolated from the kerosene, and added alone, was able to gradually degrade MTBE and to decrease its concentration for 93.6% in 12 h. However, the percentage of photolytic degradation decrease in only 4 h was 99.2%. By adding Pseudomonas strain CY after 4 h of light treatment, the degradation was enhanced to 99.55% in additional 5 h. The photocatalytic process was performed in slurry-catalyst reactor with different concentrations of TiO2 catalyst: 5, 0.5 and 0.25 g/L. The MTBE degradation producing carbon dioxide reached 91% in only 150 min, when 5 g/L of catalyst was used.
PB  - Elsevier B.V.
T2  - Desalination
T1  - Removal of methyl tertiary butyl ether from wastewaters using photolytic, photocatalytic and microbiological degradation processes
VL  - 213
IS  - 1-3
SP  - 123
EP  - 128
DO  - 10.1016/j.desal.2006.03.605
ER  - 

@article{
author = "Kuburović, Nataša and Todorović, Marija and Raičević, Vera and Orlović, Aleksandar and Jovanović, Ljubinko and Nikolić, Jasmina and Kuburović, Vladimir and Drmanić, Saša and Šolević, Tatjana",
year = "2007",
abstract = "Contamination of groundwater by methyl tertiary butyl ether (MTBE), that is detected in wastewater of petrochemical industry, is an increasing problem to water supply companies. The subjects of this research were the methods of photolytic, photocatalytic and microbiological degradation of methyl tertiary butyl ether (MTBE) dissolved in wastewaters. The effects of concentrated solar radiation simulated with sodium lamp (SONT UV 400) have been investigated in laboratory experiments. Our result indicated that bacteria Pseudomonas strain CY, isolated from the kerosene, and added alone, was able to gradually degrade MTBE and to decrease its concentration for 93.6% in 12 h. However, the percentage of photolytic degradation decrease in only 4 h was 99.2%. By adding Pseudomonas strain CY after 4 h of light treatment, the degradation was enhanced to 99.55% in additional 5 h. The photocatalytic process was performed in slurry-catalyst reactor with different concentrations of TiO2 catalyst: 5, 0.5 and 0.25 g/L. The MTBE degradation producing carbon dioxide reached 91% in only 150 min, when 5 g/L of catalyst was used.",
publisher = "Elsevier B.V.",
journal = "Desalination",
title = "Removal of methyl tertiary butyl ether from wastewaters using photolytic, photocatalytic and microbiological degradation processes",
volume = "213",
number = "1-3",
pages = "123-128",
doi = "10.1016/j.desal.2006.03.605"
}

Kuburović, N., Todorović, M., Raičević, V., Orlović, A., Jovanović, L., Nikolić, J., Kuburović, V., Drmanić, S.,& Šolević, T.. (2007). Removal of methyl tertiary butyl ether from wastewaters using photolytic, photocatalytic and microbiological degradation processes. in Desalination
Elsevier B.V.., 213(1-3), 123-128.
https://doi.org/10.1016/j.desal.2006.03.605

Kuburović N, Todorović M, Raičević V, Orlović A, Jovanović L, Nikolić J, Kuburović V, Drmanić S, Šolević T. Removal of methyl tertiary butyl ether from wastewaters using photolytic, photocatalytic and microbiological degradation processes. in Desalination. 2007;213(1-3):123-128.
doi:10.1016/j.desal.2006.03.605 .

Kuburović, Nataša, Todorović, Marija, Raičević, Vera, Orlović, Aleksandar, Jovanović, Ljubinko, Nikolić, Jasmina, Kuburović, Vladimir, Drmanić, Saša, Šolević, Tatjana, "Removal of methyl tertiary butyl ether from wastewaters using photolytic, photocatalytic and microbiological degradation processes" in Desalination, 213, no. 1-3 (2007):123-128,
https://doi.org/10.1016/j.desal.2006.03.605 . .