TY  - JOUR
AU  - Negrojević, Luka
AU  - Lončar, Aleksandar
AU  - Maksimović, Jelena
AU  - Anić, Slobodan
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
AU  - Pejić, Nataša
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4022
AB  - A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, Δτ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10− 6 − 9.2 × 10− 6 mol L− 1 and 1.1 × 10− 6 − 1.4 × 10− 5 mol L− 1, with the limit of detections of 6.6 × 10− 7 mol L− 1 and 6.4 × 10− 7 mol L− 1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed.
PB  - Springer Science and Business Media B.V.
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine
DO  - 10.1007/s11144-021-02130-5
ER  - 

@article{
author = "Negrojević, Luka and Lončar, Aleksandar and Maksimović, Jelena and Anić, Slobodan and Čupić, Željko and Kolar-Anić, Ljiljana and Pejić, Nataša",
year = "2022",
abstract = "A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, Δτ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10− 6 − 9.2 × 10− 6 mol L− 1 and 1.1 × 10− 6 − 1.4 × 10− 5 mol L− 1, with the limit of detections of 6.6 × 10− 7 mol L− 1 and 6.4 × 10− 7 mol L− 1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed.",
publisher = "Springer Science and Business Media B.V.",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine",
doi = "10.1007/s11144-021-02130-5"
}

Negrojević, L., Lončar, A., Maksimović, J., Anić, S., Čupić, Ž., Kolar-Anić, L.,& Pejić, N.. (2022). Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine. in Reaction Kinetics, Mechanisms and Catalysis
Springer Science and Business Media B.V...
https://doi.org/10.1007/s11144-021-02130-5

Negrojević L, Lončar A, Maksimović J, Anić S, Čupić Ž, Kolar-Anić L, Pejić N. Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine. in Reaction Kinetics, Mechanisms and Catalysis. 2022;.
doi:10.1007/s11144-021-02130-5 .

Negrojević, Luka, Lončar, Aleksandar, Maksimović, Jelena, Anić, Slobodan, Čupić, Željko, Kolar-Anić, Ljiljana, Pejić, Nataša, "Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine" in Reaction Kinetics, Mechanisms and Catalysis (2022),
https://doi.org/10.1007/s11144-021-02130-5 . .

TY  - JOUR
AU  - Janošević-Ležaić, Aleksandra
AU  - Pejić, Nataša
AU  - Goronja, Jelena
AU  - Pavun, Leposava
AU  - Ðikanović, Danijela
AU  - Malenović, Anđelija
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4056
AB  - The effect of acetonitrile (ACN) on the micellization of a cationic surfactant, cetyltrimethylammo-nium bromide (CTAB), in aqueous solutions at different temperatures was studied. The critical micellar concentration (CMC) as well as the degree of counter ion dissociation () of CTAB in aqueous ACN mixtures (1020 % v/v) at various temperatures (291.2298.2 K) were determined by electrical conduc-tivity measurements, while steady-state fluorescence measurements were used to determine several CMCs (for comparison) and a micellar aggregation number (Nagg) as well. At a fixed temperature, both an increase in CMC and a decrease in Nagg were observed for an increase in ACN in the solvent mixture. With a temperature increase, CMC values increased for 10 % (v/v) ACN, while for both 15 % and 20 % (v/v) ACN, CMC values were a minimum at T = 295.2 K with a temperature increase. In addition, some aspects related to the Krafft temperature behavior of CTAB in the examined micellar systems are dis-cussed.
AB  - Беше испитано влијанието на ацетонитрилот (ACN) врз мицелизацијата на катјонски сурфактант, цетилтриметиламониум бромид (CTAB), во водна средина на различни температури. Со помош на мерења на електричната спроводливост, беа определени критичната мицеларна концентрација (CMC), и степенот на дисоцијација на спротивните јони () на CTAB во водни смеси на ACN (1020 % v/v) на различни температури (291,2298,2 K), додека за определување на неколку CMC (за споредба), како и на мицеларен агрегационен број (Nagg) беа употребени рамнотежни флуоресцентни мерења. На фиксна температура беше забележано зголемување на CMC и намалување на Nagg со зголемување на ACN во смесата на растворот. Со зголемување на температурата вредностите на CMC се зголемија за 10 % (v/v) ACN, додека за 15 % и за 20 % (v/v) ACN, вредностите на CMC при зголемување на температурата на T = 295,2 K беа минимални. Покрај тоа, дискутирани се некои аспекти што се поврзани со однесувањето на температурата на Krafft на CTAB во испитуваните мицеларни системи.
PB  - Macedonian Journal of Chemistry and Chemical Engineering
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Micellar properties of cetyltrimethylammonium bromide in an acetonitrile-water mixture: conductometric and fluorescence studies
T1  - Мицеларни својства на цетилтриметиламониум бромид во смесата од ацетонитрил вода: кондуктометриски и флуоресцентни студии
VL  - 40
IS  - 2
SP  - 277
EP  - 287
DO  - 10.20450/MJCCE.2021.2394
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Pejić, Nataša and Goronja, Jelena and Pavun, Leposava and Ðikanović, Danijela and Malenović, Anđelija",
year = "2021",
abstract = "The effect of acetonitrile (ACN) on the micellization of a cationic surfactant, cetyltrimethylammo-nium bromide (CTAB), in aqueous solutions at different temperatures was studied. The critical micellar concentration (CMC) as well as the degree of counter ion dissociation () of CTAB in aqueous ACN mixtures (1020 % v/v) at various temperatures (291.2298.2 K) were determined by electrical conduc-tivity measurements, while steady-state fluorescence measurements were used to determine several CMCs (for comparison) and a micellar aggregation number (Nagg) as well. At a fixed temperature, both an increase in CMC and a decrease in Nagg were observed for an increase in ACN in the solvent mixture. With a temperature increase, CMC values increased for 10 % (v/v) ACN, while for both 15 % and 20 % (v/v) ACN, CMC values were a minimum at T = 295.2 K with a temperature increase. In addition, some aspects related to the Krafft temperature behavior of CTAB in the examined micellar systems are dis-cussed., Беше испитано влијанието на ацетонитрилот (ACN) врз мицелизацијата на катјонски сурфактант, цетилтриметиламониум бромид (CTAB), во водна средина на различни температури. Со помош на мерења на електричната спроводливост, беа определени критичната мицеларна концентрација (CMC), и степенот на дисоцијација на спротивните јони () на CTAB во водни смеси на ACN (1020 % v/v) на различни температури (291,2298,2 K), додека за определување на неколку CMC (за споредба), како и на мицеларен агрегационен број (Nagg) беа употребени рамнотежни флуоресцентни мерења. На фиксна температура беше забележано зголемување на CMC и намалување на Nagg со зголемување на ACN во смесата на растворот. Со зголемување на температурата вредностите на CMC се зголемија за 10 % (v/v) ACN, додека за 15 % и за 20 % (v/v) ACN, вредностите на CMC при зголемување на температурата на T = 295,2 K беа минимални. Покрај тоа, дискутирани се некои аспекти што се поврзани со однесувањето на температурата на Krafft на CTAB во испитуваните мицеларни системи.",
publisher = "Macedonian Journal of Chemistry and Chemical Engineering",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Micellar properties of cetyltrimethylammonium bromide in an acetonitrile-water mixture: conductometric and fluorescence studies, Мицеларни својства на цетилтриметиламониум бромид во смесата од ацетонитрил вода: кондуктометриски и флуоресцентни студии",
volume = "40",
number = "2",
pages = "277-287",
doi = "10.20450/MJCCE.2021.2394"
}

Janošević-Ležaić, A., Pejić, N., Goronja, J., Pavun, L., Ðikanović, D.,& Malenović, A.. (2021). Micellar properties of cetyltrimethylammonium bromide in an acetonitrile-water mixture: conductometric and fluorescence studies. in Macedonian Journal of Chemistry and Chemical Engineering
Macedonian Journal of Chemistry and Chemical Engineering., 40(2), 277-287.
https://doi.org/10.20450/MJCCE.2021.2394

Janošević-Ležaić A, Pejić N, Goronja J, Pavun L, Ðikanović D, Malenović A. Micellar properties of cetyltrimethylammonium bromide in an acetonitrile-water mixture: conductometric and fluorescence studies. in Macedonian Journal of Chemistry and Chemical Engineering. 2021;40(2):277-287.
doi:10.20450/MJCCE.2021.2394 .

Janošević-Ležaić, Aleksandra, Pejić, Nataša, Goronja, Jelena, Pavun, Leposava, Ðikanović, Danijela, Malenović, Anđelija, "Micellar properties of cetyltrimethylammonium bromide in an acetonitrile-water mixture: conductometric and fluorescence studies" in Macedonian Journal of Chemistry and Chemical Engineering, 40, no. 2 (2021):277-287,
https://doi.org/10.20450/MJCCE.2021.2394 . .

TY  - CONF
AU  - Pavun, Leposava
AU  - Mićić, Svetlana
AU  - Janošević-Ležaić, Aleksandra
AU  - Kovačević, Katarina
AU  - Uskoković-Marković, Snežana
AU  - Pejić, Nataša
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5218
AB  - ABSTRACT 
The current research provides the development of the new spectrophotometric 
method for the simple and affordable quercetin quantification. Proposed 
method based on formation of supramolecular assembles of quercetin (Q) and 
cetyl trimethylammonium bromide (CTAB). Under selected experimental 
conditions (l = 378 nm, cCTAB = 2 mM and T = 25 °C), Beer’s law was obeyed 
in the quercetin concentration ranged 2 ¥10-6 - 8¥10-5
 mol dm-3. The method 
sensitivity was 2.1 × 104
 dm2
 mol–1
 (the molar absorptivity) as well as 1¥10-6
mol dm-3 (the limit of detection). The method applicability to the direct Q 
determination in a pharmaceutical formulation (Quercetin+C capsules, 
Twinlab) was demonstrated.
PB  - Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry
T1  - Spectrophotometric quantification of quercetine using a micelle system
VL  - II
SP  - 983
EP  - 986
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5218
ER  - 

@conference{
author = "Pavun, Leposava and Mićić, Svetlana and Janošević-Ležaić, Aleksandra and Kovačević, Katarina and Uskoković-Marković, Snežana and Pejić, Nataša",
year = "2018",
abstract = "ABSTRACT 
The current research provides the development of the new spectrophotometric 
method for the simple and affordable quercetin quantification. Proposed 
method based on formation of supramolecular assembles of quercetin (Q) and 
cetyl trimethylammonium bromide (CTAB). Under selected experimental 
conditions (l = 378 nm, cCTAB = 2 mM and T = 25 °C), Beer’s law was obeyed 
in the quercetin concentration ranged 2 ¥10-6 - 8¥10-5
 mol dm-3. The method 
sensitivity was 2.1 × 104
 dm2
 mol–1
 (the molar absorptivity) as well as 1¥10-6
mol dm-3 (the limit of detection). The method applicability to the direct Q 
determination in a pharmaceutical formulation (Quercetin+C capsules, 
Twinlab) was demonstrated.",
publisher = "Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry",
title = "Spectrophotometric quantification of quercetine using a micelle system",
volume = "II",
pages = "983-986",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5218"
}

Pavun, L., Mićić, S., Janošević-Ležaić, A., Kovačević, K., Uskoković-Marković, S.,& Pejić, N.. (2018). Spectrophotometric quantification of quercetine using a micelle system. in PHYSICAL CHEMISTRY 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry
Society of Physical Chemists of Serbia., II, 983-986.
https://hdl.handle.net/21.15107/rcub_farfar_5218

Pavun L, Mićić S, Janošević-Ležaić A, Kovačević K, Uskoković-Marković S, Pejić N. Spectrophotometric quantification of quercetine using a micelle system. in PHYSICAL CHEMISTRY 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry. 2018;II:983-986.
https://hdl.handle.net/21.15107/rcub_farfar_5218 .

Pavun, Leposava, Mićić, Svetlana, Janošević-Ležaić, Aleksandra, Kovačević, Katarina, Uskoković-Marković, Snežana, Pejić, Nataša, "Spectrophotometric quantification of quercetine using a micelle system" in PHYSICAL CHEMISTRY 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry, II (2018):983-986,
https://hdl.handle.net/21.15107/rcub_farfar_5218 .

TY  - CONF
AU  - Janošević-Ležaić, Aleksandra
AU  - Pavun, Leposava
AU  - Đikanović, Danijela
AU  - Goronja, Jelena
AU  - Pejić, Nataša
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5217
AB  - ABSTRACT  Aggregation of the cationic surfactant cetyltrimethylammonium bromide 
(CTAB) in water (W) and acetonitrile-water (ACN-W) mixtures of different 
composition (10-20% (v/v) of ACN) was studied through fluorescence 
measurements. The CTAB critical micellar concentration (CMC) and the 
micelle aggregation number (Nagg) were determined at T = 22.0 °C. It was 
found that for increasing volume ratios of ACN to W, the CMC value attains 
a minimum (1.22 mM) at 15% (v/v) ACN while Nagg is continuously 
decreasing as ACN content in the ACN-W mixture increases. The effect of 
this dipolar aprotic solvent on the CTAB micelle formation can be interpreted 
in terms of its considerably hydrogen bonding ability and influence on balk phase properties (solvophobic effect).
PB  - Society of Physical Chemists of Serbia
C3  - Physical Chemistry 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry
T1  - Fluorimetric studies of micellar properties of cetyltrimethylammonium bromide in acetonitrile-water mixture
VL  - II
SP  - 867
EP  - 870
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5217
ER  - 

@conference{
author = "Janošević-Ležaić, Aleksandra and Pavun, Leposava and Đikanović, Danijela and Goronja, Jelena and Pejić, Nataša",
year = "2018",
abstract = "ABSTRACT  Aggregation of the cationic surfactant cetyltrimethylammonium bromide 
(CTAB) in water (W) and acetonitrile-water (ACN-W) mixtures of different 
composition (10-20% (v/v) of ACN) was studied through fluorescence 
measurements. The CTAB critical micellar concentration (CMC) and the 
micelle aggregation number (Nagg) were determined at T = 22.0 °C. It was 
found that for increasing volume ratios of ACN to W, the CMC value attains 
a minimum (1.22 mM) at 15% (v/v) ACN while Nagg is continuously 
decreasing as ACN content in the ACN-W mixture increases. The effect of 
this dipolar aprotic solvent on the CTAB micelle formation can be interpreted 
in terms of its considerably hydrogen bonding ability and influence on balk phase properties (solvophobic effect).",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical Chemistry 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry",
title = "Fluorimetric studies of micellar properties of cetyltrimethylammonium bromide in acetonitrile-water mixture",
volume = "II",
pages = "867-870",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5217"
}

Janošević-Ležaić, A., Pavun, L., Đikanović, D., Goronja, J.,& Pejić, N.. (2018). Fluorimetric studies of micellar properties of cetyltrimethylammonium bromide in acetonitrile-water mixture. in Physical Chemistry 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry
Society of Physical Chemists of Serbia., II, 867-870.
https://hdl.handle.net/21.15107/rcub_farfar_5217

Janošević-Ležaić A, Pavun L, Đikanović D, Goronja J, Pejić N. Fluorimetric studies of micellar properties of cetyltrimethylammonium bromide in acetonitrile-water mixture. in Physical Chemistry 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry. 2018;II:867-870.
https://hdl.handle.net/21.15107/rcub_farfar_5217 .

Janošević-Ležaić, Aleksandra, Pavun, Leposava, Đikanović, Danijela, Goronja, Jelena, Pejić, Nataša, "Fluorimetric studies of micellar properties of cetyltrimethylammonium bromide in acetonitrile-water mixture" in Physical Chemistry 2018 (Proceedings) 14th International Conference  on Fundamental and Applied Aspects of  Physical Chemistry, II (2018):867-870,
https://hdl.handle.net/21.15107/rcub_farfar_5217 .

TY  - JOUR
AU  - Macesić, Stevan
AU  - Čupić, Željko
AU  - Ivanović-Sasić, Ana
AU  - Anić, Slobodan
AU  - Radenković, Mirjana
AU  - Pejić, Nataša
AU  - Kolar-Anić, Ljiljana
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3203
AB  - In this paper, we intend to show the importance of the bifurcation analysis in understanding of an oscillatory process. Hence, we use the bifurcation diagram of the Bray-Liebhafsky reaction performed in continuous well-stirred tank reactor under controlled temperature variations for the determination of the activation energies as well as rate constants of particular steps appearing in the kinetic model of oscillatory reaction mechanism. This approach has led us to the development of general procedure for treatment of experimentally obtained data and extracting kinetic parameters from them, which was very important considering that some rate constants of the already proposed model could not be determined experimentally and have to be fitted (or guessed). Also, the proposed approach has the potential to inspire the refinement of already proposed models and the development of a new one that will be able to reproduce experimentally obtained system's dynamical features more successfully. In particular, the dynamic states of the Bray-Liebhafsky oscillatory reaction have been analyzed experimentally and numerically using already proposed model together with qualitative and quantitative analysis of bifurcation diagrams in both cases.
PB  - Springer, Dordrecht
T2  - Records of Natural Products
T1  - Bifurcation analysis: a tool for determining model parameters of the considered process
VL  - 123
IS  - 1
SP  - 31
EP  - 45
DO  - 10.1007/s11144-017-1324-6
ER  - 

@article{
author = "Macesić, Stevan and Čupić, Željko and Ivanović-Sasić, Ana and Anić, Slobodan and Radenković, Mirjana and Pejić, Nataša and Kolar-Anić, Ljiljana",
year = "2018",
abstract = "In this paper, we intend to show the importance of the bifurcation analysis in understanding of an oscillatory process. Hence, we use the bifurcation diagram of the Bray-Liebhafsky reaction performed in continuous well-stirred tank reactor under controlled temperature variations for the determination of the activation energies as well as rate constants of particular steps appearing in the kinetic model of oscillatory reaction mechanism. This approach has led us to the development of general procedure for treatment of experimentally obtained data and extracting kinetic parameters from them, which was very important considering that some rate constants of the already proposed model could not be determined experimentally and have to be fitted (or guessed). Also, the proposed approach has the potential to inspire the refinement of already proposed models and the development of a new one that will be able to reproduce experimentally obtained system's dynamical features more successfully. In particular, the dynamic states of the Bray-Liebhafsky oscillatory reaction have been analyzed experimentally and numerically using already proposed model together with qualitative and quantitative analysis of bifurcation diagrams in both cases.",
publisher = "Springer, Dordrecht",
journal = "Records of Natural Products",
title = "Bifurcation analysis: a tool for determining model parameters of the considered process",
volume = "123",
number = "1",
pages = "31-45",
doi = "10.1007/s11144-017-1324-6"
}

Macesić, S., Čupić, Ž., Ivanović-Sasić, A., Anić, S., Radenković, M., Pejić, N.,& Kolar-Anić, L.. (2018). Bifurcation analysis: a tool for determining model parameters of the considered process. in Records of Natural Products
Springer, Dordrecht., 123(1), 31-45.
https://doi.org/10.1007/s11144-017-1324-6

Macesić S, Čupić Ž, Ivanović-Sasić A, Anić S, Radenković M, Pejić N, Kolar-Anić L. Bifurcation analysis: a tool for determining model parameters of the considered process. in Records of Natural Products. 2018;123(1):31-45.
doi:10.1007/s11144-017-1324-6 .

Macesić, Stevan, Čupić, Željko, Ivanović-Sasić, Ana, Anić, Slobodan, Radenković, Mirjana, Pejić, Nataša, Kolar-Anić, Ljiljana, "Bifurcation analysis: a tool for determining model parameters of the considered process" in Records of Natural Products, 123, no. 1 (2018):31-45,
https://doi.org/10.1007/s11144-017-1324-6 . .

TY  - JOUR
AU  - Blagojević, Slavica
AU  - Pejić, Nataša
AU  - Blagojević, Stevan
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2885
AB  - The physicochemical properties of initial formulation, that is anionic/amphoteric surfactants mixture SLES/AOS/CAB (sodium lauryl ether sulfate (SLES), alpha-olefin sulfonates (AOS) and cocamidopropyl betaine (CAB) at ratio 80 : 15 : 5) with nonionic surfactant of amine oxide type (lauramine oxide (AO)) in various concentration (1-5%) were studied. To characterize the surfactants mixture, the critical micelle concentration (CMC), surface tension (gamma), foam volume, biodegradability and irritability were determined. This study showed that adding of AO in those mixtures lowered both gamma and CMC as well as enhanced SLES/AOS/CAB foaming properties, but did not significantly affect biodegradability and irritability of initial formulation. Moreover, an increase in AO concentration has a meaningful synergistic effect on the initial formulation properties. All those results indicates that a nonionic surfactant of amine oxide type significantly improves the performance of anionic/amphoteric mixed micelle systems, and because of that anionic/amphoteric/nonionic mixture can be used in considerably lower concentrations as a cleaning formulation.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - SAR and QSAR in Environmental Research
T1  - Synergism and Physicochemical Properties of Anionic/Amphoteric Surfactant Mixtures with Nonionic Surfactant of Amine Oxide Type
VL  - 91
IS  - 13
SP  - 2690
EP  - 2695
DO  - 10.1134/S0036024417130064
ER  - 

@article{
author = "Blagojević, Slavica and Pejić, Nataša and Blagojević, Stevan",
year = "2017",
abstract = "The physicochemical properties of initial formulation, that is anionic/amphoteric surfactants mixture SLES/AOS/CAB (sodium lauryl ether sulfate (SLES), alpha-olefin sulfonates (AOS) and cocamidopropyl betaine (CAB) at ratio 80 : 15 : 5) with nonionic surfactant of amine oxide type (lauramine oxide (AO)) in various concentration (1-5%) were studied. To characterize the surfactants mixture, the critical micelle concentration (CMC), surface tension (gamma), foam volume, biodegradability and irritability were determined. This study showed that adding of AO in those mixtures lowered both gamma and CMC as well as enhanced SLES/AOS/CAB foaming properties, but did not significantly affect biodegradability and irritability of initial formulation. Moreover, an increase in AO concentration has a meaningful synergistic effect on the initial formulation properties. All those results indicates that a nonionic surfactant of amine oxide type significantly improves the performance of anionic/amphoteric mixed micelle systems, and because of that anionic/amphoteric/nonionic mixture can be used in considerably lower concentrations as a cleaning formulation.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "SAR and QSAR in Environmental Research",
title = "Synergism and Physicochemical Properties of Anionic/Amphoteric Surfactant Mixtures with Nonionic Surfactant of Amine Oxide Type",
volume = "91",
number = "13",
pages = "2690-2695",
doi = "10.1134/S0036024417130064"
}

Blagojević, S., Pejić, N.,& Blagojević, S.. (2017). Synergism and Physicochemical Properties of Anionic/Amphoteric Surfactant Mixtures with Nonionic Surfactant of Amine Oxide Type. in SAR and QSAR in Environmental Research
Maik Nauka/Interperiodica/Springer, New York., 91(13), 2690-2695.
https://doi.org/10.1134/S0036024417130064

Blagojević S, Pejić N, Blagojević S. Synergism and Physicochemical Properties of Anionic/Amphoteric Surfactant Mixtures with Nonionic Surfactant of Amine Oxide Type. in SAR and QSAR in Environmental Research. 2017;91(13):2690-2695.
doi:10.1134/S0036024417130064 .

Blagojević, Slavica, Pejić, Nataša, Blagojević, Stevan, "Synergism and Physicochemical Properties of Anionic/Amphoteric Surfactant Mixtures with Nonionic Surfactant of Amine Oxide Type" in SAR and QSAR in Environmental Research, 91, no. 13 (2017):2690-2695,
https://doi.org/10.1134/S0036024417130064 . .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Kolar-Anić, Ljiljana
AU  - Maksimović, Jelena
AU  - Janković, Marija
AU  - Vukojević, Vladana
AU  - Anić, Slobodan
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2528
AB  - The temporal dynamics of the Bray-Liebhafsky reaction (iodate-based catalytic decomposition of hydrogen peroxide in an acidic aqueous solution) was experimentally characterized in a continuous stirred tank reactor by independently varying the temperature and the mixed inflow hydrogen peroxide concentration. When the temperature was the bifurcation parameter, the emergence/disappearance of oscillatory behavior via a supercritical Andronov-Hopf bifurcation was observed for different mixed inflow hydrogen peroxide concentrations. An increase in the mixed inflow hydrogen-peroxide concentration resulted in a shift of the bifurcation point towards higher values of temperature, but did not alter the bifurcation type.
PB  - Springer, Dordrecht
T2  - Records of Natural Products
T1  - Dynamic transitions in the Bray-Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation
VL  - 118
IS  - 1
SP  - 15
EP  - 26
DO  - 10.1007/s11144-016-0984-y
ER  - 

@article{
author = "Pejić, Nataša and Kolar-Anić, Ljiljana and Maksimović, Jelena and Janković, Marija and Vukojević, Vladana and Anić, Slobodan",
year = "2016",
abstract = "The temporal dynamics of the Bray-Liebhafsky reaction (iodate-based catalytic decomposition of hydrogen peroxide in an acidic aqueous solution) was experimentally characterized in a continuous stirred tank reactor by independently varying the temperature and the mixed inflow hydrogen peroxide concentration. When the temperature was the bifurcation parameter, the emergence/disappearance of oscillatory behavior via a supercritical Andronov-Hopf bifurcation was observed for different mixed inflow hydrogen peroxide concentrations. An increase in the mixed inflow hydrogen-peroxide concentration resulted in a shift of the bifurcation point towards higher values of temperature, but did not alter the bifurcation type.",
publisher = "Springer, Dordrecht",
journal = "Records of Natural Products",
title = "Dynamic transitions in the Bray-Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation",
volume = "118",
number = "1",
pages = "15-26",
doi = "10.1007/s11144-016-0984-y"
}

Pejić, N., Kolar-Anić, L., Maksimović, J., Janković, M., Vukojević, V.,& Anić, S.. (2016). Dynamic transitions in the Bray-Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation. in Records of Natural Products
Springer, Dordrecht., 118(1), 15-26.
https://doi.org/10.1007/s11144-016-0984-y

Pejić N, Kolar-Anić L, Maksimović J, Janković M, Vukojević V, Anić S. Dynamic transitions in the Bray-Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation. in Records of Natural Products. 2016;118(1):15-26.
doi:10.1007/s11144-016-0984-y .

Pejić, Nataša, Kolar-Anić, Ljiljana, Maksimović, Jelena, Janković, Marija, Vukojević, Vladana, Anić, Slobodan, "Dynamic transitions in the Bray-Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation" in Records of Natural Products, 118, no. 1 (2016):15-26,
https://doi.org/10.1007/s11144-016-0984-y . .

TY  - JOUR
AU  - Goronja, Jelena
AU  - Pejić, Nataša
AU  - Janošević-Ležaić, Aleksandra
AU  - Stanisavljev, Dragomir
AU  - Malenović, Anđelija
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2653
AB  - An undergraduate electrical conductivity measurement experiment in a physical chemistry lab and basic fitting procedures are presented that allow a characterization of micellar system of hexadecyttrirnethylammonium bromide (cetyltrimethylammonium bromide, CTAB) in binary mixture of water and acetonitrile (ACN) as a cosolvent (10%, v/v) at 30.0 degrees C. Conductivity-concentration data were processed by inbuilt function of ORIGIN software to attain the values of critical micelle concentration by method of integration. Acquiring the data-fitting skills that are developed through the addition of a computational tool to a conventional electrical conductometry experiment has a general significance for its applications to more complex upper-level experiments with the aim to process data and perform fast calculations and graphics.
PB  - Amer Chemical Soc, Washington
T2  - Journal of Chemical Education
T1  - Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant
VL  - 93
IS  - 7
SP  - 1277
EP  - 1281
DO  - 10.1021/acs.jchemed.5b00913
ER  - 

@article{
author = "Goronja, Jelena and Pejić, Nataša and Janošević-Ležaić, Aleksandra and Stanisavljev, Dragomir and Malenović, Anđelija",
year = "2016",
abstract = "An undergraduate electrical conductivity measurement experiment in a physical chemistry lab and basic fitting procedures are presented that allow a characterization of micellar system of hexadecyttrirnethylammonium bromide (cetyltrimethylammonium bromide, CTAB) in binary mixture of water and acetonitrile (ACN) as a cosolvent (10%, v/v) at 30.0 degrees C. Conductivity-concentration data were processed by inbuilt function of ORIGIN software to attain the values of critical micelle concentration by method of integration. Acquiring the data-fitting skills that are developed through the addition of a computational tool to a conventional electrical conductometry experiment has a general significance for its applications to more complex upper-level experiments with the aim to process data and perform fast calculations and graphics.",
publisher = "Amer Chemical Soc, Washington",
journal = "Journal of Chemical Education",
title = "Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant",
volume = "93",
number = "7",
pages = "1277-1281",
doi = "10.1021/acs.jchemed.5b00913"
}

Goronja, J., Pejić, N., Janošević-Ležaić, A., Stanisavljev, D.,& Malenović, A.. (2016). Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant. in Journal of Chemical Education
Amer Chemical Soc, Washington., 93(7), 1277-1281.
https://doi.org/10.1021/acs.jchemed.5b00913

Goronja J, Pejić N, Janošević-Ležaić A, Stanisavljev D, Malenović A. Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant. in Journal of Chemical Education. 2016;93(7):1277-1281.
doi:10.1021/acs.jchemed.5b00913 .

Goronja, Jelena, Pejić, Nataša, Janošević-Ležaić, Aleksandra, Stanisavljev, Dragomir, Malenović, Anđelija, "Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant" in Journal of Chemical Education, 93, no. 7 (2016):1277-1281,
https://doi.org/10.1021/acs.jchemed.5b00913 . .

TY  - JOUR
AU  - Goronja, Jelena M.
AU  - Janošević-Ležaić, Aleksandra
AU  - Dimitrijević, Biljana M.
AU  - Malenović, Anđelija
AU  - Stanisavljev, Dragomir
AU  - Pejić, Nataša
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2643
AB  - Conductivity of two micellar systems was measured in order to determine critical micelle concentration (CMC) of cetyltrimethylammonium bromide (CTAB). Those systems were: CTAB in water and CTAB in binary mixture acetonitrile (ACN)-water. Conductivity (kappa)- concentration
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Determination of critical micelle concentration of cetyltrimethyl-ammonium bromide: Different procedures for analysis of experimental data
VL  - 70
IS  - 4
SP  - 485
EP  - 492
DO  - 10.2298/HEMIND150622055G
ER  - 

@article{
author = "Goronja, Jelena M. and Janošević-Ležaić, Aleksandra and Dimitrijević, Biljana M. and Malenović, Anđelija and Stanisavljev, Dragomir and Pejić, Nataša",
year = "2016",
abstract = "Conductivity of two micellar systems was measured in order to determine critical micelle concentration (CMC) of cetyltrimethylammonium bromide (CTAB). Those systems were: CTAB in water and CTAB in binary mixture acetonitrile (ACN)-water. Conductivity (kappa)- concentration",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Determination of critical micelle concentration of cetyltrimethyl-ammonium bromide: Different procedures for analysis of experimental data",
volume = "70",
number = "4",
pages = "485-492",
doi = "10.2298/HEMIND150622055G"
}

Goronja, J. M., Janošević-Ležaić, A., Dimitrijević, B. M., Malenović, A., Stanisavljev, D.,& Pejić, N.. (2016). Determination of critical micelle concentration of cetyltrimethyl-ammonium bromide: Different procedures for analysis of experimental data. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 70(4), 485-492.
https://doi.org/10.2298/HEMIND150622055G

Goronja JM, Janošević-Ležaić A, Dimitrijević BM, Malenović A, Stanisavljev D, Pejić N. Determination of critical micelle concentration of cetyltrimethyl-ammonium bromide: Different procedures for analysis of experimental data. in Hemijska industrija. 2016;70(4):485-492.
doi:10.2298/HEMIND150622055G .

Goronja, Jelena M., Janošević-Ležaić, Aleksandra, Dimitrijević, Biljana M., Malenović, Anđelija, Stanisavljev, Dragomir, Pejić, Nataša, "Determination of critical micelle concentration of cetyltrimethyl-ammonium bromide: Different procedures for analysis of experimental data" in Hemijska industrija, 70, no. 4 (2016):485-492,
https://doi.org/10.2298/HEMIND150622055G . .

TY  - JOUR
AU  - Blagojević, Stevan
AU  - Blagojević, Slavica
AU  - Pejić, Nataša
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2593
AB  - Performance and efficiency of anionic [sodium lauryl ether sulfate (SLES) and sodium alpha-olefin sulfonate (AOS)] and amphoteric [cocamidopropyl betaine (CAB)] as well as nonionic [cocodiethanol amide (DEA), various ethoxylated alcohols (C-12-C-15-7EO, C-10-7EO and C-9-C-11-7EO) and lauramine oxide (AO)] surfactants in various dishwashing liquid mixed micelle systems have been studied at different temperatures (17.0, 23.0 and 42.0 degrees C). The investigated parameters were critical micelle concentration (CMC), surface tension (gamma), cleaning performance and, foaming, biodegradability and irritability of anionic (SLES/AOS) and anionic/amphoteric/nonionic (SLES/AOS/CAB/AO) as well as anionic/nonionic (SLES/AOS/DEA/AO, SLES/AOS/C-12-C-15-7EO/AO, SLES/AOS/C-10-7EO/AO and SLES/AOS/C-9-C-11-7EO/AO) dishwashing surfactant mixtures. In comparison to the starting binary SLES/AOS surfactant mixture, addition of various nonionic surfactants promoted CMC and gamma lowering, enhanced cleaning performance and foaming, but did not significantly affect biodegradability and irritability of dishwashing formulations. The anionic/nonionic formulation SLES/AOS/C-9-C-11-7EO/AO shows both the lowest CMC and gamma as well as the best cleaning performance, compared to the other examined dishwashing formulations. However, the results in this study reveal that synergistic behavior of anionic/nonionic SLES/AOS/ethoxylated alcohols/AO formulations significantly improves dishwashing performance and efficiency at both low and regular dishwashing temperatures (17.0 and 42.0 degrees C) and lead to better application properties.
PB  - Wiley, Hoboken
T2  - Journal of Surfactants and Detergents
T1  - Performance and Efficiency of Anionic Dishwashing Liquids with Amphoteric and Nonionic Surfactants
VL  - 19
IS  - 2
SP  - 363
EP  - 372
DO  - 10.1007/s11743-015-1784-5
ER  - 

@article{
author = "Blagojević, Stevan and Blagojević, Slavica and Pejić, Nataša",
year = "2016",
abstract = "Performance and efficiency of anionic [sodium lauryl ether sulfate (SLES) and sodium alpha-olefin sulfonate (AOS)] and amphoteric [cocamidopropyl betaine (CAB)] as well as nonionic [cocodiethanol amide (DEA), various ethoxylated alcohols (C-12-C-15-7EO, C-10-7EO and C-9-C-11-7EO) and lauramine oxide (AO)] surfactants in various dishwashing liquid mixed micelle systems have been studied at different temperatures (17.0, 23.0 and 42.0 degrees C). The investigated parameters were critical micelle concentration (CMC), surface tension (gamma), cleaning performance and, foaming, biodegradability and irritability of anionic (SLES/AOS) and anionic/amphoteric/nonionic (SLES/AOS/CAB/AO) as well as anionic/nonionic (SLES/AOS/DEA/AO, SLES/AOS/C-12-C-15-7EO/AO, SLES/AOS/C-10-7EO/AO and SLES/AOS/C-9-C-11-7EO/AO) dishwashing surfactant mixtures. In comparison to the starting binary SLES/AOS surfactant mixture, addition of various nonionic surfactants promoted CMC and gamma lowering, enhanced cleaning performance and foaming, but did not significantly affect biodegradability and irritability of dishwashing formulations. The anionic/nonionic formulation SLES/AOS/C-9-C-11-7EO/AO shows both the lowest CMC and gamma as well as the best cleaning performance, compared to the other examined dishwashing formulations. However, the results in this study reveal that synergistic behavior of anionic/nonionic SLES/AOS/ethoxylated alcohols/AO formulations significantly improves dishwashing performance and efficiency at both low and regular dishwashing temperatures (17.0 and 42.0 degrees C) and lead to better application properties.",
publisher = "Wiley, Hoboken",
journal = "Journal of Surfactants and Detergents",
title = "Performance and Efficiency of Anionic Dishwashing Liquids with Amphoteric and Nonionic Surfactants",
volume = "19",
number = "2",
pages = "363-372",
doi = "10.1007/s11743-015-1784-5"
}

Blagojević, S., Blagojević, S.,& Pejić, N.. (2016). Performance and Efficiency of Anionic Dishwashing Liquids with Amphoteric and Nonionic Surfactants. in Journal of Surfactants and Detergents
Wiley, Hoboken., 19(2), 363-372.
https://doi.org/10.1007/s11743-015-1784-5

Blagojević S, Blagojević S, Pejić N. Performance and Efficiency of Anionic Dishwashing Liquids with Amphoteric and Nonionic Surfactants. in Journal of Surfactants and Detergents. 2016;19(2):363-372.
doi:10.1007/s11743-015-1784-5 .

Blagojević, Stevan, Blagojević, Slavica, Pejić, Nataša, "Performance and Efficiency of Anionic Dishwashing Liquids with Amphoteric and Nonionic Surfactants" in Journal of Surfactants and Detergents, 19, no. 2 (2016):363-372,
https://doi.org/10.1007/s11743-015-1784-5 . .

TY  - JOUR
AU  - Stanković, Branislav
AU  - Čupić, Željko
AU  - Macesić, Stevan
AU  - Pejić, Nataša
AU  - Kolar-Anić, Ljiljana
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2542
AB  - The mixing of different types of bifurcations, i.e. supercritical Andronov-Hopf (SAH), double loop (DL) and saddle-loop (SL) bifurcations in the vicinity of their total annihilation, is examined on the highly nonlinear six-variable model for the Bray-Liebhafsky (BL) oscillatory reaction under continuously well-stirred tank reactor (CSTR) conditions. For this kind of the reaction system where the law of mass conservation is additional constraint that must be satisfied and where because of that, some simple bifurcations cannot be formed independently to the others, the considered transformations of the bifurcations are particularly important. That is why as the control parameters for bifurcation analysis, the specific flow rate (j(0)), as well as the inflow hydrogen peroxide concentration (h = [H2O2](in)), were used. The complex bifurcations obtained from numerical simulations are compared with some experimental results. It was shown that these complex bifurcations cannot be easily recognized in experimental investigations without knowing their evolution.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chaos Solitons & Fractals
T1  - Complex bifurcations in the oscillatory reaction model
VL  - 87
SP  - 84
EP  - 91
DO  - 10.1016/j.chaos.2016.03.013
ER  - 

@article{
author = "Stanković, Branislav and Čupić, Željko and Macesić, Stevan and Pejić, Nataša and Kolar-Anić, Ljiljana",
year = "2016",
abstract = "The mixing of different types of bifurcations, i.e. supercritical Andronov-Hopf (SAH), double loop (DL) and saddle-loop (SL) bifurcations in the vicinity of their total annihilation, is examined on the highly nonlinear six-variable model for the Bray-Liebhafsky (BL) oscillatory reaction under continuously well-stirred tank reactor (CSTR) conditions. For this kind of the reaction system where the law of mass conservation is additional constraint that must be satisfied and where because of that, some simple bifurcations cannot be formed independently to the others, the considered transformations of the bifurcations are particularly important. That is why as the control parameters for bifurcation analysis, the specific flow rate (j(0)), as well as the inflow hydrogen peroxide concentration (h = [H2O2](in)), were used. The complex bifurcations obtained from numerical simulations are compared with some experimental results. It was shown that these complex bifurcations cannot be easily recognized in experimental investigations without knowing their evolution.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chaos Solitons & Fractals",
title = "Complex bifurcations in the oscillatory reaction model",
volume = "87",
pages = "84-91",
doi = "10.1016/j.chaos.2016.03.013"
}

Stanković, B., Čupić, Ž., Macesić, S., Pejić, N.,& Kolar-Anić, L.. (2016). Complex bifurcations in the oscillatory reaction model. in Chaos Solitons & Fractals
Pergamon-Elsevier Science Ltd, Oxford., 87, 84-91.
https://doi.org/10.1016/j.chaos.2016.03.013

Stanković B, Čupić Ž, Macesić S, Pejić N, Kolar-Anić L. Complex bifurcations in the oscillatory reaction model. in Chaos Solitons & Fractals. 2016;87:84-91.
doi:10.1016/j.chaos.2016.03.013 .

Stanković, Branislav, Čupić, Željko, Macesić, Stevan, Pejić, Nataša, Kolar-Anić, Ljiljana, "Complex bifurcations in the oscillatory reaction model" in Chaos Solitons & Fractals, 87 (2016):84-91,
https://doi.org/10.1016/j.chaos.2016.03.013 . .

TY  - JOUR
AU  - Macesic, Stevan R.
AU  - Čupić, Željko
AU  - Blagojević, Slavica
AU  - Pejić, Nataša
AU  - Anić, Slobodan
AU  - Kolar-Anić, Ljiljana
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2455
AB  - In stoichiometric network analysis (SNA) the instability condition is calculated by the current rates. Recently, we have shown that in the final result the current rates can be substituted by reaction rates, which is a more appropriate value for the examination of instability from experimental point of view. Here, we elaborate the problem of whether the current rates are necessary parameters in the calculation, with the aim of obtaining the region of instability. All calculations are performed on a model for Belousov-Zhabotinsky (BZ) reaction, which has not been examined by SNA.
PB  - De Gruyter Open Ltd, Warsaw
T2  - Open Chemistry
T1  - Current rates and reaction rates in the Stoichiometric Network Analysis (SNA)
VL  - 13
IS  - 1
SP  - 591
EP  - 599
DO  - 10.1515/chem-2015-0077
ER  - 

@article{
author = "Macesic, Stevan R. and Čupić, Željko and Blagojević, Slavica and Pejić, Nataša and Anić, Slobodan and Kolar-Anić, Ljiljana",
year = "2015",
abstract = "In stoichiometric network analysis (SNA) the instability condition is calculated by the current rates. Recently, we have shown that in the final result the current rates can be substituted by reaction rates, which is a more appropriate value for the examination of instability from experimental point of view. Here, we elaborate the problem of whether the current rates are necessary parameters in the calculation, with the aim of obtaining the region of instability. All calculations are performed on a model for Belousov-Zhabotinsky (BZ) reaction, which has not been examined by SNA.",
publisher = "De Gruyter Open Ltd, Warsaw",
journal = "Open Chemistry",
title = "Current rates and reaction rates in the Stoichiometric Network Analysis (SNA)",
volume = "13",
number = "1",
pages = "591-599",
doi = "10.1515/chem-2015-0077"
}

Macesic, S. R., Čupić, Ž., Blagojević, S., Pejić, N., Anić, S.,& Kolar-Anić, L.. (2015). Current rates and reaction rates in the Stoichiometric Network Analysis (SNA). in Open Chemistry
De Gruyter Open Ltd, Warsaw., 13(1), 591-599.
https://doi.org/10.1515/chem-2015-0077

Macesic SR, Čupić Ž, Blagojević S, Pejić N, Anić S, Kolar-Anić L. Current rates and reaction rates in the Stoichiometric Network Analysis (SNA). in Open Chemistry. 2015;13(1):591-599.
doi:10.1515/chem-2015-0077 .

Macesic, Stevan R., Čupić, Željko, Blagojević, Slavica, Pejić, Nataša, Anić, Slobodan, Kolar-Anić, Ljiljana, "Current rates and reaction rates in the Stoichiometric Network Analysis (SNA)" in Open Chemistry, 13, no. 1 (2015):591-599,
https://doi.org/10.1515/chem-2015-0077 . .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Blagojević, Slavica
AU  - Sarap, Nataša B.
AU  - Maksimović, Jelena
AU  - Anić, Slobodan
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2172
AB  - Perturbation of the BrayLiebhafsky non-oscillating subsystem (mixture of KIO3 and H2SO4), i.e., Dushman reaction (DR), by piroxicam (PX), was observed in an open reactor, i.e., in the continuously fed well-stirred tank reactor (CSTR). Monitoring the response of DR to perturbations by different concentrations of PX allows developing a simple procedure for quantitative determination of this analyte in both bulk drug and pharmaceutical preparation (injection). A tentative perturbation mechanism of PX action on the DR matrix, based on a kinetic scheme that was suggested by Agreda etal., is proposed. The PX reactivity in DR has been generally related to the reaction of PX with hypoiodous acid (HIO) present in the matrix.
PB  - Wiley-VCH Verlag GMBH, Weinheim
T2  - Helvetica Chimica Acta
T1  - Perturbations of the Dushman Reaction with Piroxicam: Experimental and Model Calculations
VL  - 97
IS  - 1
SP  - 47
EP  - 55
DO  - 10.1002/hlca.201300109
ER  - 

@article{
author = "Pejić, Nataša and Blagojević, Slavica and Sarap, Nataša B. and Maksimović, Jelena and Anić, Slobodan and Čupić, Željko and Kolar-Anić, Ljiljana",
year = "2014",
abstract = "Perturbation of the BrayLiebhafsky non-oscillating subsystem (mixture of KIO3 and H2SO4), i.e., Dushman reaction (DR), by piroxicam (PX), was observed in an open reactor, i.e., in the continuously fed well-stirred tank reactor (CSTR). Monitoring the response of DR to perturbations by different concentrations of PX allows developing a simple procedure for quantitative determination of this analyte in both bulk drug and pharmaceutical preparation (injection). A tentative perturbation mechanism of PX action on the DR matrix, based on a kinetic scheme that was suggested by Agreda etal., is proposed. The PX reactivity in DR has been generally related to the reaction of PX with hypoiodous acid (HIO) present in the matrix.",
publisher = "Wiley-VCH Verlag GMBH, Weinheim",
journal = "Helvetica Chimica Acta",
title = "Perturbations of the Dushman Reaction with Piroxicam: Experimental and Model Calculations",
volume = "97",
number = "1",
pages = "47-55",
doi = "10.1002/hlca.201300109"
}

Pejić, N., Blagojević, S., Sarap, N. B., Maksimović, J., Anić, S., Čupić, Ž.,& Kolar-Anić, L.. (2014). Perturbations of the Dushman Reaction with Piroxicam: Experimental and Model Calculations. in Helvetica Chimica Acta
Wiley-VCH Verlag GMBH, Weinheim., 97(1), 47-55.
https://doi.org/10.1002/hlca.201300109

Pejić N, Blagojević S, Sarap NB, Maksimović J, Anić S, Čupić Ž, Kolar-Anić L. Perturbations of the Dushman Reaction with Piroxicam: Experimental and Model Calculations. in Helvetica Chimica Acta. 2014;97(1):47-55.
doi:10.1002/hlca.201300109 .

Pejić, Nataša, Blagojević, Slavica, Sarap, Nataša B., Maksimović, Jelena, Anić, Slobodan, Čupić, Željko, Kolar-Anić, Ljiljana, "Perturbations of the Dushman Reaction with Piroxicam: Experimental and Model Calculations" in Helvetica Chimica Acta, 97, no. 1 (2014):47-55,
https://doi.org/10.1002/hlca.201300109 . .

TY  - JOUR
AU  - Janošević-Ležaić, Aleksandra
AU  - Paunović, Nikola
AU  - Pejić, Nataša
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2294
AB  - Micellization of hexadecyltrimethylammonium bromide (syn. cetyltrimethylammonium bromide, CTAB) in propylene glycol-water (30% v/v) binary mixture, as well as the thermodynamic properties of the resulting micelles, were investigated by electrical conductivity measurements. The conductivity data were used to determine both the critical micellar concentration (CMC) and the micellar ionization degree (∞) of CTAB in the temperature range 298.2-310.2 K. The equilibrium model of micelle formation was applied in order to obtain the thermodynamic parameters (the standard molar Gibbs free energy, ∆Gmº, enthalpy, ∆Hm0 and entropy, ∆Smº) of the micellization process. The values of ∆Gmº and ∆Hmº were found to be negative at all investigated temperatures, while the values of ∆Smº were positive and became more positive as temperature increased. A linear dependence between ∆Smº and ∆Hmº, i.e. an enthalpy-entropy compensation effect, was observed.
AB  - Konduktometrijski je ispitivana micelizacija heksadeciltrimetilamonijum-bromida (sinonim cetiltrimetilamonijum-bromid, CTAB) u binarnoj smeši propilen-glikol-voda (30%, v/v), kao i termodinamičke osobine nastalih micela. Merenjem specifične provodljivosti određeni su kritična micelarna koncentracija (KMK) i stepen jonizacije micele (∞) CTAB u opsegu temperatura 298,2-310,2 K određeni su. Primenom ravnotežnog modela za proces micelizacije izračunati su termodinamički parametri: promena standardne molarne Džibsove slobodne energije, (∆Gmº), entalpije (∆Hmº) i entropije (∆Smº) micelizacije. Vrednosti ∆Gmº i ∆Hmº su bile negativne na svakoj od ispitivanih temperatura, dok su vrednosti ∆Smº bile pozitivne i povećavale su se sa porastom temperature. Na osnovu linearne zavisnosti između ∆Hmº i ∆Smº utvrđen je tzv. entalpijsko-entropijski kompenzacioni efekat.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Physics, Chemistry and Technology
T1  - Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylene glycol-water mixture: A conductivity study
T1  - Termodinamika micelizacije heksadeciltrimetilamonijum-bromida u smeši propilen-glikol-voda - konduktometrijsko ispitivanje
VL  - 12
IS  - 1
SP  - 17
EP  - 26
DO  - 10.2298/FUPCT1401017J
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Paunović, Nikola and Pejić, Nataša",
year = "2014",
abstract = "Micellization of hexadecyltrimethylammonium bromide (syn. cetyltrimethylammonium bromide, CTAB) in propylene glycol-water (30% v/v) binary mixture, as well as the thermodynamic properties of the resulting micelles, were investigated by electrical conductivity measurements. The conductivity data were used to determine both the critical micellar concentration (CMC) and the micellar ionization degree (∞) of CTAB in the temperature range 298.2-310.2 K. The equilibrium model of micelle formation was applied in order to obtain the thermodynamic parameters (the standard molar Gibbs free energy, ∆Gmº, enthalpy, ∆Hm0 and entropy, ∆Smº) of the micellization process. The values of ∆Gmº and ∆Hmº were found to be negative at all investigated temperatures, while the values of ∆Smº were positive and became more positive as temperature increased. A linear dependence between ∆Smº and ∆Hmº, i.e. an enthalpy-entropy compensation effect, was observed., Konduktometrijski je ispitivana micelizacija heksadeciltrimetilamonijum-bromida (sinonim cetiltrimetilamonijum-bromid, CTAB) u binarnoj smeši propilen-glikol-voda (30%, v/v), kao i termodinamičke osobine nastalih micela. Merenjem specifične provodljivosti određeni su kritična micelarna koncentracija (KMK) i stepen jonizacije micele (∞) CTAB u opsegu temperatura 298,2-310,2 K određeni su. Primenom ravnotežnog modela za proces micelizacije izračunati su termodinamički parametri: promena standardne molarne Džibsove slobodne energije, (∆Gmº), entalpije (∆Hmº) i entropije (∆Smº) micelizacije. Vrednosti ∆Gmº i ∆Hmº su bile negativne na svakoj od ispitivanih temperatura, dok su vrednosti ∆Smº bile pozitivne i povećavale su se sa porastom temperature. Na osnovu linearne zavisnosti između ∆Hmº i ∆Smº utvrđen je tzv. entalpijsko-entropijski kompenzacioni efekat.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Physics, Chemistry and Technology",
title = "Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylene glycol-water mixture: A conductivity study, Termodinamika micelizacije heksadeciltrimetilamonijum-bromida u smeši propilen-glikol-voda - konduktometrijsko ispitivanje",
volume = "12",
number = "1",
pages = "17-26",
doi = "10.2298/FUPCT1401017J"
}

Janošević-Ležaić, A., Paunović, N.,& Pejić, N.. (2014). Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylene glycol-water mixture: A conductivity study. in Facta universitatis - series: Physics, Chemistry and Technology
Univerzitet u Nišu, Niš., 12(1), 17-26.
https://doi.org/10.2298/FUPCT1401017J

Janošević-Ležaić A, Paunović N, Pejić N. Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylene glycol-water mixture: A conductivity study. in Facta universitatis - series: Physics, Chemistry and Technology. 2014;12(1):17-26.
doi:10.2298/FUPCT1401017J .

Janošević-Ležaić, Aleksandra, Paunović, Nikola, Pejić, Nataša, "Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylene glycol-water mixture: A conductivity study" in Facta universitatis - series: Physics, Chemistry and Technology, 12, no. 1 (2014):17-26,
https://doi.org/10.2298/FUPCT1401017J . .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Sarap, Nataša B.
AU  - Maksimović, Jelena
AU  - Anić, Slobodan
AU  - Kolar-Anić, Ljiljana
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1940
AB  - A simple and reliable novel kinetic method for the determination of piroxicam (PX) was proposed and validated. For quantitative determination of PX, the Bray-Liebhafsky (BL) oscillatory reaction was used in a stable non-equilibrium stationary state close to the bifurcation point. Under the optimized reaction conditions (T = 55.0A degrees C, [H2SO4](0) = 7.60x10(-2) mol L-1, [KIO3](0) = 5.90x10(-2) mol L-1, [H2O2](0) = 1.50x10(-1) mol L-1 and j (0) = 2.95x10(-2) min(-1)), the linear relationship between maximal potential shift Delta E (m) , and PX concentration was obtained in the concentration range 11.2-480.5 A mu g mL(-1) with a detection limit of 9.9 A mu g mL(-1). The method had a rather good sample throughput of 25 samples h(-1) with a precision RSD = 4.7% as well as recoveries RCV a parts per thousand currency sign 104.4%. Applicability of the proposed method to the direct determination of piroxicam in different pharmaceutical formulations (tablets, ampoules and gel) was demonstrated.
PB  - Versita, Warsaw
T2  - Central European Journal of Chemistry
T1  - Pulse perturbation technique for determination of piroxicam in pharmaceuticals using an oscillatory reaction system
VL  - 11
IS  - 2
SP  - 180
EP  - 188
DO  - 10.2478/s11532-012-0146-7
ER  - 

@article{
author = "Pejić, Nataša and Sarap, Nataša B. and Maksimović, Jelena and Anić, Slobodan and Kolar-Anić, Ljiljana",
year = "2013",
abstract = "A simple and reliable novel kinetic method for the determination of piroxicam (PX) was proposed and validated. For quantitative determination of PX, the Bray-Liebhafsky (BL) oscillatory reaction was used in a stable non-equilibrium stationary state close to the bifurcation point. Under the optimized reaction conditions (T = 55.0A degrees C, [H2SO4](0) = 7.60x10(-2) mol L-1, [KIO3](0) = 5.90x10(-2) mol L-1, [H2O2](0) = 1.50x10(-1) mol L-1 and j (0) = 2.95x10(-2) min(-1)), the linear relationship between maximal potential shift Delta E (m) , and PX concentration was obtained in the concentration range 11.2-480.5 A mu g mL(-1) with a detection limit of 9.9 A mu g mL(-1). The method had a rather good sample throughput of 25 samples h(-1) with a precision RSD = 4.7% as well as recoveries RCV a parts per thousand currency sign 104.4%. Applicability of the proposed method to the direct determination of piroxicam in different pharmaceutical formulations (tablets, ampoules and gel) was demonstrated.",
publisher = "Versita, Warsaw",
journal = "Central European Journal of Chemistry",
title = "Pulse perturbation technique for determination of piroxicam in pharmaceuticals using an oscillatory reaction system",
volume = "11",
number = "2",
pages = "180-188",
doi = "10.2478/s11532-012-0146-7"
}

Pejić, N., Sarap, N. B., Maksimović, J., Anić, S.,& Kolar-Anić, L.. (2013). Pulse perturbation technique for determination of piroxicam in pharmaceuticals using an oscillatory reaction system. in Central European Journal of Chemistry
Versita, Warsaw., 11(2), 180-188.
https://doi.org/10.2478/s11532-012-0146-7

Pejić N, Sarap NB, Maksimović J, Anić S, Kolar-Anić L. Pulse perturbation technique for determination of piroxicam in pharmaceuticals using an oscillatory reaction system. in Central European Journal of Chemistry. 2013;11(2):180-188.
doi:10.2478/s11532-012-0146-7 .

Pejić, Nataša, Sarap, Nataša B., Maksimović, Jelena, Anić, Slobodan, Kolar-Anić, Ljiljana, "Pulse perturbation technique for determination of piroxicam in pharmaceuticals using an oscillatory reaction system" in Central European Journal of Chemistry, 11, no. 2 (2013):180-188,
https://doi.org/10.2478/s11532-012-0146-7 . .

TY  - JOUR
AU  - Blagojević, Slavica
AU  - Blagojević, Stevan
AU  - Pejić, Nataša
AU  - Begović, Biljana
AU  - Gajinov, Spasenka P.
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1938
AB  - In this study, in order to evaluate the quality and safety of selected commercial spices brands, contents of moisture and minerals, as well as the concentration of certain heavy metals (As, Hg and Pb) were determined in oregano, sweet basil, parsley and celery. The spice samples were subjected to microwave digestion, and were analyzed by atomic absorption spectrometry (AAS), using hydride generation AAS technique, cold vapor AAS technique, and graphite furnace AAS technique for determination of As, Hg and Pb, respectively. Maximum concentrations of As and Pb were determined in the same brand sample of celery, and are 0.75 ppm and 0.40 ppm, respectively, while the maximum concentration of Hg in various brands sweet basil samples is 0.05 ppm. According to the results, the contents of moisture and minerals, as well as the concentrations of heavy metals in all selected spices were below the maximum permissible limits declared by the national legislations, and are safe for human consumption.
AB  - U ovom radu, u cilju određivanja kvaliteta i bezbednosti izabranih začina, određen je sadržaj vlage i ukupnih mineralnih materija, kao i koncentracije arsena (As), žive (Hg) i olova (Pb) u uzorcima origana, bosiljka, peršuna i celera. Koncentracije teških metala As, Hg i Pb, nakon mikrotalasne digestije, određene su različitim analitičkim tehnikama atomske apsorcione spektrometrije, primenom hidridne tehnike (As), tehnike hladne pare (Hg) i tehnike grafitne peći (Pb). Maksimalne koncentracije As i Pb određene su u istom uzorku celera i iznose 0,75 ppm i 0,40 ppm, respektivno, dok je maksimalna koncentracija Hg određena u uzorcima bosiljka i iznosi 0,05 ppm. U uzorcima začina, vrednosti sadržaja vlage, minerala i koncentracije ispitivanih teških metala su ispod maksimalno dozvoljenih vrednosti propisanih zakonskom regulativom Republike Srbije.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Acta periodica technologica
T1  - Quality and safety of some commercial spices brands
T1  - Kvalitet i bezbednost nekih komercijalnih začina
IS  - 44
SP  - 1
EP  - 9
DO  - 10.2298/APT1344001B
ER  - 

@article{
author = "Blagojević, Slavica and Blagojević, Stevan and Pejić, Nataša and Begović, Biljana and Gajinov, Spasenka P.",
year = "2013",
abstract = "In this study, in order to evaluate the quality and safety of selected commercial spices brands, contents of moisture and minerals, as well as the concentration of certain heavy metals (As, Hg and Pb) were determined in oregano, sweet basil, parsley and celery. The spice samples were subjected to microwave digestion, and were analyzed by atomic absorption spectrometry (AAS), using hydride generation AAS technique, cold vapor AAS technique, and graphite furnace AAS technique for determination of As, Hg and Pb, respectively. Maximum concentrations of As and Pb were determined in the same brand sample of celery, and are 0.75 ppm and 0.40 ppm, respectively, while the maximum concentration of Hg in various brands sweet basil samples is 0.05 ppm. According to the results, the contents of moisture and minerals, as well as the concentrations of heavy metals in all selected spices were below the maximum permissible limits declared by the national legislations, and are safe for human consumption., U ovom radu, u cilju određivanja kvaliteta i bezbednosti izabranih začina, određen je sadržaj vlage i ukupnih mineralnih materija, kao i koncentracije arsena (As), žive (Hg) i olova (Pb) u uzorcima origana, bosiljka, peršuna i celera. Koncentracije teških metala As, Hg i Pb, nakon mikrotalasne digestije, određene su različitim analitičkim tehnikama atomske apsorcione spektrometrije, primenom hidridne tehnike (As), tehnike hladne pare (Hg) i tehnike grafitne peći (Pb). Maksimalne koncentracije As i Pb određene su u istom uzorku celera i iznose 0,75 ppm i 0,40 ppm, respektivno, dok je maksimalna koncentracija Hg određena u uzorcima bosiljka i iznosi 0,05 ppm. U uzorcima začina, vrednosti sadržaja vlage, minerala i koncentracije ispitivanih teških metala su ispod maksimalno dozvoljenih vrednosti propisanih zakonskom regulativom Republike Srbije.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Acta periodica technologica",
title = "Quality and safety of some commercial spices brands, Kvalitet i bezbednost nekih komercijalnih začina",
number = "44",
pages = "1-9",
doi = "10.2298/APT1344001B"
}

Blagojević, S., Blagojević, S., Pejić, N., Begović, B.,& Gajinov, S. P.. (2013). Quality and safety of some commercial spices brands. in Acta periodica technologica
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad.(44), 1-9.
https://doi.org/10.2298/APT1344001B

Blagojević S, Blagojević S, Pejić N, Begović B, Gajinov SP. Quality and safety of some commercial spices brands. in Acta periodica technologica. 2013;(44):1-9.
doi:10.2298/APT1344001B .

Blagojević, Slavica, Blagojević, Stevan, Pejić, Nataša, Begović, Biljana, Gajinov, Spasenka P., "Quality and safety of some commercial spices brands" in Acta periodica technologica, no. 44 (2013):1-9,
https://doi.org/10.2298/APT1344001B . .

TY  - JOUR
AU  - Stanković, Branislav
AU  - Čupić, Željko
AU  - Pejić, Nataša
AU  - Kolar-Anić, Ljiljana
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2031
AB  - The time series obtained by numerical simulations of the model of the Bray-Liebhafsky oscillatory reaction is analyzed under the continuously fed well stirred tank reactor (CSTR) conditions, with the aim to find bifurcation points in which system of Bray- Liebhafsky oscillatory reaction transforms from stable to unstable state and vice versa. Types of bifurcation points, supercritical and subcritical Andronov-Hopf bifurcation and saddle-loop bifurcation are determined from characteristic scaling laws.
PB  - L and H Scientific Publishing, LLC
T2  - Journal of Applied Nonlinear Dynamics
T1  - Numerical study on Bray-Liebhafsky oscillatory reaction: Bifurcations
VL  - 2
IS  - 3
SP  - 285
EP  - 301
DO  - 10.5890/JAND.2013.08.004
ER  - 

@article{
author = "Stanković, Branislav and Čupić, Željko and Pejić, Nataša and Kolar-Anić, Ljiljana",
year = "2013",
abstract = "The time series obtained by numerical simulations of the model of the Bray-Liebhafsky oscillatory reaction is analyzed under the continuously fed well stirred tank reactor (CSTR) conditions, with the aim to find bifurcation points in which system of Bray- Liebhafsky oscillatory reaction transforms from stable to unstable state and vice versa. Types of bifurcation points, supercritical and subcritical Andronov-Hopf bifurcation and saddle-loop bifurcation are determined from characteristic scaling laws.",
publisher = "L and H Scientific Publishing, LLC",
journal = "Journal of Applied Nonlinear Dynamics",
title = "Numerical study on Bray-Liebhafsky oscillatory reaction: Bifurcations",
volume = "2",
number = "3",
pages = "285-301",
doi = "10.5890/JAND.2013.08.004"
}

Stanković, B., Čupić, Ž., Pejić, N.,& Kolar-Anić, L.. (2013). Numerical study on Bray-Liebhafsky oscillatory reaction: Bifurcations. in Journal of Applied Nonlinear Dynamics
L and H Scientific Publishing, LLC., 2(3), 285-301.
https://doi.org/10.5890/JAND.2013.08.004

Stanković B, Čupić Ž, Pejić N, Kolar-Anić L. Numerical study on Bray-Liebhafsky oscillatory reaction: Bifurcations. in Journal of Applied Nonlinear Dynamics. 2013;2(3):285-301.
doi:10.5890/JAND.2013.08.004 .

Stanković, Branislav, Čupić, Željko, Pejić, Nataša, Kolar-Anić, Ljiljana, "Numerical study on Bray-Liebhafsky oscillatory reaction: Bifurcations" in Journal of Applied Nonlinear Dynamics, 2, no. 3 (2013):285-301,
https://doi.org/10.5890/JAND.2013.08.004 . .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Maksimović, Jelena
AU  - Blagojević, Slavica
AU  - Anić, Slobodan
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1655
AB  - Simple and reliable novel methods for the determination of uric acid (UA) are proposed and validated. For quantitative determination of UA, two matrices were used: the Bray-Liebhafsky (BL) oscillatory reaction in a stable non-equilibrium stationary state close to the bifurcation point (method A) as well as, the BL non-oscillating subsystem (mixture KIO3 and H2SO4), i.e., Dushman reaction (DR) in a steady state (method B). The proposed methods are optimized in a continuously fed well stirred tank reactor (CSTR) and applied with excellent results in the determination of UA in human urine samples. The linear relationship between maximal potential shift Delta E-m, and both the logarithm of the UA concentration (procedure A) and UA concentration (procedure B) is obtained in the concentration range 2.98 x 10(-5)-2.68 x 10(-4) mol L-1 and 2.98 x 10(-5)-3.58 x 10(-4) mol L-1, respectively. The methods have an excellent sample throughput of 30 samples h(-1) (method A) and 7 samples h(-1) (method B) with the sensitivity determined to be 1.1 x 10(-5) mol L-1 (method A) and 8.9 x 10(-6) mol L-1 (method B) as well as the precision RSD  lt = 3.4% for both methods. Some aspects of the possible mechanism of UA action on the BL oscillating and Duschman non-oscillating reaction systems are discussed in detail.
PB  - Soc Brasileira Quimica, Sao Paulo
T2  - Journal of the Brazilian Chemical Society
T1  - Kinetic Analytical Method for Determination of Uric Acid in Human Urine using Analyte Pulse Perturbation Technique
VL  - 23
IS  - 8
SP  - 1450
EP  - 1459
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1655
ER  - 

@article{
author = "Pejić, Nataša and Maksimović, Jelena and Blagojević, Slavica and Anić, Slobodan and Čupić, Željko and Kolar-Anić, Ljiljana",
year = "2012",
abstract = "Simple and reliable novel methods for the determination of uric acid (UA) are proposed and validated. For quantitative determination of UA, two matrices were used: the Bray-Liebhafsky (BL) oscillatory reaction in a stable non-equilibrium stationary state close to the bifurcation point (method A) as well as, the BL non-oscillating subsystem (mixture KIO3 and H2SO4), i.e., Dushman reaction (DR) in a steady state (method B). The proposed methods are optimized in a continuously fed well stirred tank reactor (CSTR) and applied with excellent results in the determination of UA in human urine samples. The linear relationship between maximal potential shift Delta E-m, and both the logarithm of the UA concentration (procedure A) and UA concentration (procedure B) is obtained in the concentration range 2.98 x 10(-5)-2.68 x 10(-4) mol L-1 and 2.98 x 10(-5)-3.58 x 10(-4) mol L-1, respectively. The methods have an excellent sample throughput of 30 samples h(-1) (method A) and 7 samples h(-1) (method B) with the sensitivity determined to be 1.1 x 10(-5) mol L-1 (method A) and 8.9 x 10(-6) mol L-1 (method B) as well as the precision RSD  lt = 3.4% for both methods. Some aspects of the possible mechanism of UA action on the BL oscillating and Duschman non-oscillating reaction systems are discussed in detail.",
publisher = "Soc Brasileira Quimica, Sao Paulo",
journal = "Journal of the Brazilian Chemical Society",
title = "Kinetic Analytical Method for Determination of Uric Acid in Human Urine using Analyte Pulse Perturbation Technique",
volume = "23",
number = "8",
pages = "1450-1459",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1655"
}

Pejić, N., Maksimović, J., Blagojević, S., Anić, S., Čupić, Ž.,& Kolar-Anić, L.. (2012). Kinetic Analytical Method for Determination of Uric Acid in Human Urine using Analyte Pulse Perturbation Technique. in Journal of the Brazilian Chemical Society
Soc Brasileira Quimica, Sao Paulo., 23(8), 1450-1459.
https://hdl.handle.net/21.15107/rcub_farfar_1655

Pejić N, Maksimović J, Blagojević S, Anić S, Čupić Ž, Kolar-Anić L. Kinetic Analytical Method for Determination of Uric Acid in Human Urine using Analyte Pulse Perturbation Technique. in Journal of the Brazilian Chemical Society. 2012;23(8):1450-1459.
https://hdl.handle.net/21.15107/rcub_farfar_1655 .

Pejić, Nataša, Maksimović, Jelena, Blagojević, Slavica, Anić, Slobodan, Čupić, Željko, Kolar-Anić, Ljiljana, "Kinetic Analytical Method for Determination of Uric Acid in Human Urine using Analyte Pulse Perturbation Technique" in Journal of the Brazilian Chemical Society, 23, no. 8 (2012):1450-1459,
https://hdl.handle.net/21.15107/rcub_farfar_1655 .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Anić, Slobodan
AU  - Kolar-Anić, Ljiljana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1770
AB  - Novel analytical methods for quantitive determination of analytes based on perturbations of oscillatory chemical reactions realized under open reactor conditions (continuosly fed well stirred tank reactor, CSTR), have been developed in the past twenty years. The proposed kinetic methods are generally based on the ability of the analyzed substances to change the kinetics of the chemical reactions matrix. The unambiguous correlation of quantitative characteristics of perturbations, and the amount (concentration) of analyte expressed as a regression equation, or its graphics (calibration curve), enable the determination of the unknown analyte concentration. Attention is given to the development of these methods because of their simple experimental procedures, broad range of linear regression (10-7-10-4 mol L-1) and low limits of detection of analytes (10-6-10-8 mol L-1, in some cases even lower than 10-12 mol L-1). Therefore, their application is very convenient for routine analysis of various inorganic and organic compounds as well as gases. This review summarizes progress made in the past 5 years on quantitative determination of pharmaceutically and biologically important compounds.
AB  - U poslednjih dvadesetak godina razvijene su brojne analitičke primene oscilatornih hemijskih reakcija realizovanih u otvorenom reaktoru. Predložene kinetičke metode se zasnivaju na sposobnosti analiziranih supstancija da menjaju kinetičke parametre hemijskih reakcija, pri čemu eksperimentalno dobijeni signal odražava reakcionu brzinu koja zavisi od koncentracije ispitivanog analita. Razvoju ovih metoda poklanja se sve veća pažnja zbog jednostavne eksperimentalne procedure, velikog linearnog opsega regresione jednačine (10-7-10-4 mol L-1) i niskog limita detekcije (10-6-10-8 mol L-1, u nekim slučajevima, ? 10-12 mol L-1), a njihovo korišćenje je vrlo pogodno za rutinske analize različitih neorganskih i organskih jedinjenja, kao i gasova. Ovaj rad ima za cilj da dâ kratki pregled primene takozvane pulsne perturbacione tehnike za kvantitativna određivanja nekih farmaceutski i biološki važnih jedinjenja u periodu od druge polovine 2005. godine do prve polovine 2011. godine.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Analytical applications of oscillatory chemical reactions: Determination of some pharmaceutically and biologically important compounds
T1  - Analitičke primene oscilatornih hemijskih reakcija - određivanje nekih farmaceutskih i biološki važnih jedinjenja
VL  - 66
IS  - 2
SP  - 153
EP  - 164
DO  - 10.2298/HEMIND110912081P
ER  - 

@article{
author = "Pejić, Nataša and Anić, Slobodan and Kolar-Anić, Ljiljana",
year = "2012",
abstract = "Novel analytical methods for quantitive determination of analytes based on perturbations of oscillatory chemical reactions realized under open reactor conditions (continuosly fed well stirred tank reactor, CSTR), have been developed in the past twenty years. The proposed kinetic methods are generally based on the ability of the analyzed substances to change the kinetics of the chemical reactions matrix. The unambiguous correlation of quantitative characteristics of perturbations, and the amount (concentration) of analyte expressed as a regression equation, or its graphics (calibration curve), enable the determination of the unknown analyte concentration. Attention is given to the development of these methods because of their simple experimental procedures, broad range of linear regression (10-7-10-4 mol L-1) and low limits of detection of analytes (10-6-10-8 mol L-1, in some cases even lower than 10-12 mol L-1). Therefore, their application is very convenient for routine analysis of various inorganic and organic compounds as well as gases. This review summarizes progress made in the past 5 years on quantitative determination of pharmaceutically and biologically important compounds., U poslednjih dvadesetak godina razvijene su brojne analitičke primene oscilatornih hemijskih reakcija realizovanih u otvorenom reaktoru. Predložene kinetičke metode se zasnivaju na sposobnosti analiziranih supstancija da menjaju kinetičke parametre hemijskih reakcija, pri čemu eksperimentalno dobijeni signal odražava reakcionu brzinu koja zavisi od koncentracije ispitivanog analita. Razvoju ovih metoda poklanja se sve veća pažnja zbog jednostavne eksperimentalne procedure, velikog linearnog opsega regresione jednačine (10-7-10-4 mol L-1) i niskog limita detekcije (10-6-10-8 mol L-1, u nekim slučajevima, ? 10-12 mol L-1), a njihovo korišćenje je vrlo pogodno za rutinske analize različitih neorganskih i organskih jedinjenja, kao i gasova. Ovaj rad ima za cilj da dâ kratki pregled primene takozvane pulsne perturbacione tehnike za kvantitativna određivanja nekih farmaceutski i biološki važnih jedinjenja u periodu od druge polovine 2005. godine do prve polovine 2011. godine.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Analytical applications of oscillatory chemical reactions: Determination of some pharmaceutically and biologically important compounds, Analitičke primene oscilatornih hemijskih reakcija - određivanje nekih farmaceutskih i biološki važnih jedinjenja",
volume = "66",
number = "2",
pages = "153-164",
doi = "10.2298/HEMIND110912081P"
}

Pejić, N., Anić, S.,& Kolar-Anić, L.. (2012). Analytical applications of oscillatory chemical reactions: Determination of some pharmaceutically and biologically important compounds. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 66(2), 153-164.
https://doi.org/10.2298/HEMIND110912081P

Pejić N, Anić S, Kolar-Anić L. Analytical applications of oscillatory chemical reactions: Determination of some pharmaceutically and biologically important compounds. in Hemijska industrija. 2012;66(2):153-164.
doi:10.2298/HEMIND110912081P .

Pejić, Nataša, Anić, Slobodan, Kolar-Anić, Ljiljana, "Analytical applications of oscillatory chemical reactions: Determination of some pharmaceutically and biologically important compounds" in Hemijska industrija, 66, no. 2 (2012):153-164,
https://doi.org/10.2298/HEMIND110912081P . .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Janošević, Aleksandra
AU  - Rogić, Jelica
AU  - Paunović, Nikola
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1804
AB  - The effect of cosolvent (propylen glycol, PG) on micellization of an cationic surfactant, hexadecyltrimethylammonium bromide (hereinafter cetylecyltrimethylammonium bromide, CTAB) in aqueous solution was studied. The thermodynamic of micellization and the aggregation behaviour of CTAB in PG-water mixture at different temperatures (from 298.2 K to 310.2 K) have been studied conductometrically. The conductivity data were used to determine the critical micellar concentration (CMC) and degree of micellar ionization (α) of CTAB in PG-water (20% v/v) binary mixtures at different temperatures (298.2 K, 306.2 K and 310.2 K). The equilibrium model of micelle formation was applied to obtain the thermodynamics parameters (the standard molar Gibs free energy (ΔGm 0), enthalpy (ΔHm 0) and entropy (ΔSm 0)) of micellization. Those parameters were determined using temperature dependance of CMC. Value of DGm 0 was found to be negative at all temperatures and becomes less negative as the temperature increases. Values of ΔHm 0 and ΔSm 0 were found to be negative in all cases, and increase dramaticaly with temperature in 20 % (v/v) PG. An entalpy-entropy compenzation effect was observed. Moreover, based on experimental data, it can be concluded that the micellization process in the examined system is substantially similar to the CTAB micellization in water, and the presence of PG has a negligible effect on the CTAB-water interactions.
AB  - U radu je ispitan uticaj korastvarača (propilenglikola, PG) na micelizaciju katjonskog surfaktanta, heksadeciltrimetilamonijum-bromida (cetiltrimetilamonijum-bromida, CTAB) u vodenom rastvoru. Termodinamika micelizacije i agregaciono ponašanje CTAB u smeši PG-voda na različitim temperaturama (od 298,2 K do 310,2 K) ispitivani su konduktometrijski. Kritična micelarna koncentracija (KMK) i stepen jonizacije micele (α) CTAB u smeši PG-voda (20% (v/v)), na različitim temperaturama (298,2 K, 306,2 K i 310,2 K) određeni su merenjem specifične provodljivosti. Primenom ravnotežnog modela za proces formiranja micela i iz temperaturne zavisnosti KMK, izračunati su termodinamički parametri (promena standardne molarne Gibsove slobodne energije, (Δm 0), entalpije (ΔHm 0) i entropije (ΔSm 0)) micelizacije. Vrednost DGm 0 je negativna na svakoj od ispitivanih temperatura; ove vrednosti se smanjuju po apsolutnoj vrednosti sa povećanjem temperature. Vrednosti ΔHm 0 i ΔSm 0 su negativne na svakoj od ispitivanih temperatura i drastično se povećavaju po apsolutnoj vrednosti sa povećanjem temperature u smeši PG-voda. Za proces micelizacije CTAB u smeši PG-voda (20% (v/v)), dobijen je tzv. entalpijsko-entropijski kompenzacioni efekat. Štaviše, na osnovu eksperimentalno dobijenih podataka može se zaključiti da je proces micelizacije u ispitivanom sistemu suštinski sličan micelizaciji CTAB u vodi, i da prisustvo PG ima neznatan uticaj na interakcije između CTAB i vode.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylen glycol-water binary mixture
T1  - Termodinamika micelizacije heksadeciltrimetilamonijum-bromida u binarnoj smeši propilenglikol-voda
VL  - 62
IS  - 5
SP  - 429
EP  - 442
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1804
ER  - 

@article{
author = "Pejić, Nataša and Janošević, Aleksandra and Rogić, Jelica and Paunović, Nikola",
year = "2012",
abstract = "The effect of cosolvent (propylen glycol, PG) on micellization of an cationic surfactant, hexadecyltrimethylammonium bromide (hereinafter cetylecyltrimethylammonium bromide, CTAB) in aqueous solution was studied. The thermodynamic of micellization and the aggregation behaviour of CTAB in PG-water mixture at different temperatures (from 298.2 K to 310.2 K) have been studied conductometrically. The conductivity data were used to determine the critical micellar concentration (CMC) and degree of micellar ionization (α) of CTAB in PG-water (20% v/v) binary mixtures at different temperatures (298.2 K, 306.2 K and 310.2 K). The equilibrium model of micelle formation was applied to obtain the thermodynamics parameters (the standard molar Gibs free energy (ΔGm 0), enthalpy (ΔHm 0) and entropy (ΔSm 0)) of micellization. Those parameters were determined using temperature dependance of CMC. Value of DGm 0 was found to be negative at all temperatures and becomes less negative as the temperature increases. Values of ΔHm 0 and ΔSm 0 were found to be negative in all cases, and increase dramaticaly with temperature in 20 % (v/v) PG. An entalpy-entropy compenzation effect was observed. Moreover, based on experimental data, it can be concluded that the micellization process in the examined system is substantially similar to the CTAB micellization in water, and the presence of PG has a negligible effect on the CTAB-water interactions., U radu je ispitan uticaj korastvarača (propilenglikola, PG) na micelizaciju katjonskog surfaktanta, heksadeciltrimetilamonijum-bromida (cetiltrimetilamonijum-bromida, CTAB) u vodenom rastvoru. Termodinamika micelizacije i agregaciono ponašanje CTAB u smeši PG-voda na različitim temperaturama (od 298,2 K do 310,2 K) ispitivani su konduktometrijski. Kritična micelarna koncentracija (KMK) i stepen jonizacije micele (α) CTAB u smeši PG-voda (20% (v/v)), na različitim temperaturama (298,2 K, 306,2 K i 310,2 K) određeni su merenjem specifične provodljivosti. Primenom ravnotežnog modela za proces formiranja micela i iz temperaturne zavisnosti KMK, izračunati su termodinamički parametri (promena standardne molarne Gibsove slobodne energije, (Δm 0), entalpije (ΔHm 0) i entropije (ΔSm 0)) micelizacije. Vrednost DGm 0 je negativna na svakoj od ispitivanih temperatura; ove vrednosti se smanjuju po apsolutnoj vrednosti sa povećanjem temperature. Vrednosti ΔHm 0 i ΔSm 0 su negativne na svakoj od ispitivanih temperatura i drastično se povećavaju po apsolutnoj vrednosti sa povećanjem temperature u smeši PG-voda. Za proces micelizacije CTAB u smeši PG-voda (20% (v/v)), dobijen je tzv. entalpijsko-entropijski kompenzacioni efekat. Štaviše, na osnovu eksperimentalno dobijenih podataka može se zaključiti da je proces micelizacije u ispitivanom sistemu suštinski sličan micelizaciji CTAB u vodi, i da prisustvo PG ima neznatan uticaj na interakcije između CTAB i vode.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylen glycol-water binary mixture, Termodinamika micelizacije heksadeciltrimetilamonijum-bromida u binarnoj smeši propilenglikol-voda",
volume = "62",
number = "5",
pages = "429-442",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1804"
}

Pejić, N., Janošević, A., Rogić, J.,& Paunović, N.. (2012). Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylen glycol-water binary mixture. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 62(5), 429-442.
https://hdl.handle.net/21.15107/rcub_farfar_1804

Pejić N, Janošević A, Rogić J, Paunović N. Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylen glycol-water binary mixture. in Arhiv za farmaciju. 2012;62(5):429-442.
https://hdl.handle.net/21.15107/rcub_farfar_1804 .

Pejić, Nataša, Janošević, Aleksandra, Rogić, Jelica, Paunović, Nikola, "Thermodynamics of micellization of hexadecyltrimethylammonium bromide in propylen glycol-water binary mixture" in Arhiv za farmaciju, 62, no. 5 (2012):429-442,
https://hdl.handle.net/21.15107/rcub_farfar_1804 .

TY  - JOUR
AU  - Pejić, Nataša
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1788
AB  - Surfactants are substances of specific chemical structure which are capable of reducing the surface tension of liquid they are dispersed; they are basic ingredients of the widely used products such as detergents, cosmetics, paints and pesticides and many petroleum products. The green surfactants are surface active agens which are obtained from natural oils (for example palm or coconut oil) as well as plant carbohydrates (for example polysaccharides from marine algae) and they are main ingredients of both biodegradable and biocompatible products. Their use is a response to growing consumer demands for products that are 'greener', milder and more efficient, due to which green surfactants derivation from natural renewable resources is the concept that is increasingly used in industry of detergents and cosmetics. In this context, alkyl polyglucosides (APG) are key green surfactants whose use is an excellent solution for manufacturers who aim to combine efficiency and safety in the final product. In this paper, the author gave a short overview of alkyl polyglycosides as well as further perspective in their uses.
AB  - Surfaktanti su supstance specifične hemijske strukture koje smanjuju površinski napon tečnosti u kojoj su rastvoreni ili dispergovani; oni su osnovni sastojci široko korišćenih proizvoda kao što su detergenti, kozmetički preparati, boje i pesticidi, a mnogi su naftni derivati. Zeleni surfaktanti su površinski aktivne materije koje se dobijaju iz biljnih ulja (npr. iz palminog ili kokosovog ulja) i biljnih ugljenih hidrata (npr. šećerne trske ili žitarica) i predstavljaju osnovne sastojke različitih biorazgradivih i biokompatibilnih proizvoda. Njihovo korišćenje je odgovor na sve veću potražnju potrošača za proizvodima koji su 'zeleniji', blaži i efikasniji, zbog čega je dobijanje zelenih surfaktanata iz prirodno obnovljivih izvora koncept koji se sve više koristi u industriji detergenata i kozmetici. U ovom kontekstu, alkil poliglikozidi (APG) su ključni zeleni surfaktanti čija upotreba predstavlja odlično rešenje za proizvođače čiji je cilj kombinovanje efikasnosti i bezbednosti u finalnom proizvodu. Ovo je priča o njima.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Hemijski pregled
T1  - Green story about alkyl polyglycosides
T1  - Zelena priča o alkil poliglikozidima
VL  - 53
IS  - 6
SP  - 158
EP  - 164
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1788
ER  - 

@article{
author = "Pejić, Nataša",
year = "2012",
abstract = "Surfactants are substances of specific chemical structure which are capable of reducing the surface tension of liquid they are dispersed; they are basic ingredients of the widely used products such as detergents, cosmetics, paints and pesticides and many petroleum products. The green surfactants are surface active agens which are obtained from natural oils (for example palm or coconut oil) as well as plant carbohydrates (for example polysaccharides from marine algae) and they are main ingredients of both biodegradable and biocompatible products. Their use is a response to growing consumer demands for products that are 'greener', milder and more efficient, due to which green surfactants derivation from natural renewable resources is the concept that is increasingly used in industry of detergents and cosmetics. In this context, alkyl polyglucosides (APG) are key green surfactants whose use is an excellent solution for manufacturers who aim to combine efficiency and safety in the final product. In this paper, the author gave a short overview of alkyl polyglycosides as well as further perspective in their uses., Surfaktanti su supstance specifične hemijske strukture koje smanjuju površinski napon tečnosti u kojoj su rastvoreni ili dispergovani; oni su osnovni sastojci široko korišćenih proizvoda kao što su detergenti, kozmetički preparati, boje i pesticidi, a mnogi su naftni derivati. Zeleni surfaktanti su površinski aktivne materije koje se dobijaju iz biljnih ulja (npr. iz palminog ili kokosovog ulja) i biljnih ugljenih hidrata (npr. šećerne trske ili žitarica) i predstavljaju osnovne sastojke različitih biorazgradivih i biokompatibilnih proizvoda. Njihovo korišćenje je odgovor na sve veću potražnju potrošača za proizvodima koji su 'zeleniji', blaži i efikasniji, zbog čega je dobijanje zelenih surfaktanata iz prirodno obnovljivih izvora koncept koji se sve više koristi u industriji detergenata i kozmetici. U ovom kontekstu, alkil poliglikozidi (APG) su ključni zeleni surfaktanti čija upotreba predstavlja odlično rešenje za proizvođače čiji je cilj kombinovanje efikasnosti i bezbednosti u finalnom proizvodu. Ovo je priča o njima.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Hemijski pregled",
title = "Green story about alkyl polyglycosides, Zelena priča o alkil poliglikozidima",
volume = "53",
number = "6",
pages = "158-164",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1788"
}

Pejić, N.. (2012). Green story about alkyl polyglycosides. in Hemijski pregled
Srpsko hemijsko društvo, Beograd., 53(6), 158-164.
https://hdl.handle.net/21.15107/rcub_farfar_1788

Pejić N. Green story about alkyl polyglycosides. in Hemijski pregled. 2012;53(6):158-164.
https://hdl.handle.net/21.15107/rcub_farfar_1788 .

Pejić, Nataša, "Green story about alkyl polyglycosides" in Hemijski pregled, 53, no. 6 (2012):158-164,
https://hdl.handle.net/21.15107/rcub_farfar_1788 .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Pejić, Nataša
AU  - Micić, Svetlana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1734
AB  - A simple, rapid and reliable direct spectrophotometric method for the determination of hesperidin is proposed and validated. The influence of wavelength, solvent, the ionic strength, pH and temperature on hesperidin determination were investigated. Under the optimum conditions, lambda = 283 nm, 60% methanol as the solvent, ionic strength, I = 2.5 x 10(-5) mol L-1, pH = 6.4 and T = 37.0 degrees C, the Beer's law is obeyed in the concentration range 1.83-24.5 mu g mL(-1). The molar absorptivity and Sandells sensitivity were found to be 1.8 x 10(4) L mol(-1) cm(-1) and 0.03 mu g cm(-2), respectively. The sensitivity of the proposed method was 0.9 mu g mL(-1) (as limit of detection) and 3.2 mu g mL(-1) (as limit of quantification). Applicability of the proposed method to the direct determination of total flavonoids as hesperidin equivalents in pharmaceutical formulation (Vitamin C with citrus bioflavonoids & Rose Hips) was demonstrated. Although the presence of ascorbic acid may cause problem in identification and measurements, hesperidin has been determined successfully.
PB  - Slovensko Kemijsko Drustvo, Ljubljana
T2  - Acta Chimica Slovenica
T1  - Direct Spectrophotometric Determination of Hesperidin in Pharmaceutical Preparations
VL  - 59
IS  - 2
SP  - 436
EP  - 441
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1734
ER  - 

@article{
author = "Kuntić, Vesna and Pejić, Nataša and Micić, Svetlana",
year = "2012",
abstract = "A simple, rapid and reliable direct spectrophotometric method for the determination of hesperidin is proposed and validated. The influence of wavelength, solvent, the ionic strength, pH and temperature on hesperidin determination were investigated. Under the optimum conditions, lambda = 283 nm, 60% methanol as the solvent, ionic strength, I = 2.5 x 10(-5) mol L-1, pH = 6.4 and T = 37.0 degrees C, the Beer's law is obeyed in the concentration range 1.83-24.5 mu g mL(-1). The molar absorptivity and Sandells sensitivity were found to be 1.8 x 10(4) L mol(-1) cm(-1) and 0.03 mu g cm(-2), respectively. The sensitivity of the proposed method was 0.9 mu g mL(-1) (as limit of detection) and 3.2 mu g mL(-1) (as limit of quantification). Applicability of the proposed method to the direct determination of total flavonoids as hesperidin equivalents in pharmaceutical formulation (Vitamin C with citrus bioflavonoids & Rose Hips) was demonstrated. Although the presence of ascorbic acid may cause problem in identification and measurements, hesperidin has been determined successfully.",
publisher = "Slovensko Kemijsko Drustvo, Ljubljana",
journal = "Acta Chimica Slovenica",
title = "Direct Spectrophotometric Determination of Hesperidin in Pharmaceutical Preparations",
volume = "59",
number = "2",
pages = "436-441",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1734"
}

Kuntić, V., Pejić, N.,& Micić, S.. (2012). Direct Spectrophotometric Determination of Hesperidin in Pharmaceutical Preparations. in Acta Chimica Slovenica
Slovensko Kemijsko Drustvo, Ljubljana., 59(2), 436-441.
https://hdl.handle.net/21.15107/rcub_farfar_1734

Kuntić V, Pejić N, Micić S. Direct Spectrophotometric Determination of Hesperidin in Pharmaceutical Preparations. in Acta Chimica Slovenica. 2012;59(2):436-441.
https://hdl.handle.net/21.15107/rcub_farfar_1734 .

Kuntić, Vesna, Pejić, Nataša, Micić, Svetlana, "Direct Spectrophotometric Determination of Hesperidin in Pharmaceutical Preparations" in Acta Chimica Slovenica, 59, no. 2 (2012):436-441,
https://hdl.handle.net/21.15107/rcub_farfar_1734 .

TY  - JOUR
AU  - Maksimović, Jelena
AU  - Čupić, Željko
AU  - Lončarević, D.
AU  - Pejić, Nataša
AU  - Vasiljević-Radović, D.
AU  - Anić, Slobodan
PY  - 2011
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1575
AB  - The Bray-Liebhafsky (BL) oscillatory reaction generated in the batch reactor at 62- 68 oC was perturbed by cobalt(II)-nitrate, supported on the macroreticular copolymer of poly-4-vinylpyridine with divinylbenzene (Co-PVPDVB). The kinetic data was analyzed of the complex pathways of the hydrogen peroxide decomposition in the examined BL reaction. The obtained results confirm that the kinetics of the BL reaction in the presence Co-PVPDVB comes partially from the Co-catalyst and partially from the macroreticular copolymer support.
AB  - Oscilatorna reakcija Bray-Liebhafsky (BL) realizovana u zatvorenom reaktoru na temperaturi 62-68 oC je perturbovana sa kobalt(II)nitratom ugrađenim na makroretikularnom kopolimeru poli-4-vinilpiridina sa divinilbenzenom (Co- PVPDVB). Analizirani su kinetički podaci kompleksnih reakcionih puteva razlaganja vodonikperoksida u ispitivanoj BL reakciji. Dobijeni rezultati potvrđuju da je u prisustvu Co-PVPDVB kinetika BL reakcije delimično određena Co-katalizatorom, a delimično makromolekularnim kopolimernim nosačem katalizatora.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst
VL  - 43
IS  - 1
SP  - 55
EP  - 62
DO  - 10.2298/SOS1101055M
ER  - 

@article{
author = "Maksimović, Jelena and Čupić, Željko and Lončarević, D. and Pejić, Nataša and Vasiljević-Radović, D. and Anić, Slobodan",
year = "2011",
abstract = "The Bray-Liebhafsky (BL) oscillatory reaction generated in the batch reactor at 62- 68 oC was perturbed by cobalt(II)-nitrate, supported on the macroreticular copolymer of poly-4-vinylpyridine with divinylbenzene (Co-PVPDVB). The kinetic data was analyzed of the complex pathways of the hydrogen peroxide decomposition in the examined BL reaction. The obtained results confirm that the kinetics of the BL reaction in the presence Co-PVPDVB comes partially from the Co-catalyst and partially from the macroreticular copolymer support., Oscilatorna reakcija Bray-Liebhafsky (BL) realizovana u zatvorenom reaktoru na temperaturi 62-68 oC je perturbovana sa kobalt(II)nitratom ugrađenim na makroretikularnom kopolimeru poli-4-vinilpiridina sa divinilbenzenom (Co- PVPDVB). Analizirani su kinetički podaci kompleksnih reakcionih puteva razlaganja vodonikperoksida u ispitivanoj BL reakciji. Dobijeni rezultati potvrđuju da je u prisustvu Co-PVPDVB kinetika BL reakcije delimično određena Co-katalizatorom, a delimično makromolekularnim kopolimernim nosačem katalizatora.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst",
volume = "43",
number = "1",
pages = "55-62",
doi = "10.2298/SOS1101055M"
}

Maksimović, J., Čupić, Ž., Lončarević, D., Pejić, N., Vasiljević-Radović, D.,& Anić, S.. (2011). Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 43(1), 55-62.
https://doi.org/10.2298/SOS1101055M

Maksimović J, Čupić Ž, Lončarević D, Pejić N, Vasiljević-Radović D, Anić S. Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst. in Science of Sintering. 2011;43(1):55-62.
doi:10.2298/SOS1101055M .

Maksimović, Jelena, Čupić, Željko, Lončarević, D., Pejić, Nataša, Vasiljević-Radović, D., Anić, Slobodan, "Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst" in Science of Sintering, 43, no. 1 (2011):55-62,
https://doi.org/10.2298/SOS1101055M . .

TY  - JOUR
AU  - Maksimović, Jelena
AU  - Kolar-Anić, Ljiljana
AU  - Anić, Slobodan
AU  - Ribić, Dragana D.
AU  - Pejić, Nataša
PY  - 2011
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1536
AB  - A novel procedure for kinetic determination of some water-soluble vitamins of the B-group (thiamine (B-1), riboflavin (B-2), niacin (B-3) and pyridoxine (B-6)) by the concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical system involving the catalytic decomposition of hydrogen peroxide in the presence of both hydrogen and iodate ions is proposed and validated. The method uses a Pt electrode for potentiometric monitoring of the concentration perturbations of the BL matrix in a stable non-equilibrium stationary state close to the bifurcation point. The proposed method relies on the linear relationship between maximal potential displacements, Delta E-m, caused by the additional known quantities of a B species. Under the optimal established analytical conditions, linear calibration curves were obtained over the range of 0.01-1.0, 0.016-0.128, 5.0-50.0 and 0.05-2.5 mu mol with the limits of detection of 0.01, 0.018, 2.6 and 0.03 mu mol, as well as analytical throughput of 30, 5, 12 and 20 determinations per hour, for B-1, B-2, B-3 and B-6, respectively. The used technical approach also provides simple, effective and convenient method to assay the pharmaceutical formulations containing B-1 together with other active principles such as nicotinamide and vitamin B-12 as well as B-3.
PB  - Soc Brasileira Quimica, Sao Paulo
T2  - Journal of the Brazilian Chemical Society
T1  - Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction
VL  - 22
IS  - 1
SP  - 38
EP  - 48
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1536
ER  - 

@article{
author = "Maksimović, Jelena and Kolar-Anić, Ljiljana and Anić, Slobodan and Ribić, Dragana D. and Pejić, Nataša",
year = "2011",
abstract = "A novel procedure for kinetic determination of some water-soluble vitamins of the B-group (thiamine (B-1), riboflavin (B-2), niacin (B-3) and pyridoxine (B-6)) by the concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical system involving the catalytic decomposition of hydrogen peroxide in the presence of both hydrogen and iodate ions is proposed and validated. The method uses a Pt electrode for potentiometric monitoring of the concentration perturbations of the BL matrix in a stable non-equilibrium stationary state close to the bifurcation point. The proposed method relies on the linear relationship between maximal potential displacements, Delta E-m, caused by the additional known quantities of a B species. Under the optimal established analytical conditions, linear calibration curves were obtained over the range of 0.01-1.0, 0.016-0.128, 5.0-50.0 and 0.05-2.5 mu mol with the limits of detection of 0.01, 0.018, 2.6 and 0.03 mu mol, as well as analytical throughput of 30, 5, 12 and 20 determinations per hour, for B-1, B-2, B-3 and B-6, respectively. The used technical approach also provides simple, effective and convenient method to assay the pharmaceutical formulations containing B-1 together with other active principles such as nicotinamide and vitamin B-12 as well as B-3.",
publisher = "Soc Brasileira Quimica, Sao Paulo",
journal = "Journal of the Brazilian Chemical Society",
title = "Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction",
volume = "22",
number = "1",
pages = "38-48",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1536"
}

Maksimović, J., Kolar-Anić, L., Anić, S., Ribić, D. D.,& Pejić, N.. (2011). Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction. in Journal of the Brazilian Chemical Society
Soc Brasileira Quimica, Sao Paulo., 22(1), 38-48.
https://hdl.handle.net/21.15107/rcub_farfar_1536

Maksimović J, Kolar-Anić L, Anić S, Ribić DD, Pejić N. Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction. in Journal of the Brazilian Chemical Society. 2011;22(1):38-48.
https://hdl.handle.net/21.15107/rcub_farfar_1536 .

Maksimović, Jelena, Kolar-Anić, Ljiljana, Anić, Slobodan, Ribić, Dragana D., Pejić, Nataša, "Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction" in Journal of the Brazilian Chemical Society, 22, no. 1 (2011):38-48,
https://hdl.handle.net/21.15107/rcub_farfar_1536 .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Vujković, Milica
AU  - Maksimović, Jelena
AU  - Ivanović, A.
AU  - Anić, Slobodan
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
PY  - 2011
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1516
AB  - The non-periodic, periodic and chaotic regimes in the Bray-Liebhafsky (BL) oscillatory reaction observed in a continuously fed well stirred tank reactor (CSTR) under isothermal conditions at various inflow concentrations of the sulfuric acid were experimentally studied. In each series (at any fixed temperature), termination of oscillatory behavior via saddle loop infinite period bifurcation (SNIPER) as well as some kind of the Andronov-Hopf bifurcation is presented. In addition, it was found that an increase of temperature, in different series of experiments resulted in the shift of bifurcation point towards higher values of sulfuric acid concentration.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - SAR and QSAR in Environmental Research
T1  - Dynamic behavior of the bray-liebhafsky oscillatory reaction controlled by sulfuric acid and temperature
VL  - 85
IS  - 13
SP  - 2310
EP  - 2316
DO  - 10.1134/S0036024411130231
ER  - 

@article{
author = "Pejić, Nataša and Vujković, Milica and Maksimović, Jelena and Ivanović, A. and Anić, Slobodan and Čupić, Željko and Kolar-Anić, Ljiljana",
year = "2011",
abstract = "The non-periodic, periodic and chaotic regimes in the Bray-Liebhafsky (BL) oscillatory reaction observed in a continuously fed well stirred tank reactor (CSTR) under isothermal conditions at various inflow concentrations of the sulfuric acid were experimentally studied. In each series (at any fixed temperature), termination of oscillatory behavior via saddle loop infinite period bifurcation (SNIPER) as well as some kind of the Andronov-Hopf bifurcation is presented. In addition, it was found that an increase of temperature, in different series of experiments resulted in the shift of bifurcation point towards higher values of sulfuric acid concentration.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "SAR and QSAR in Environmental Research",
title = "Dynamic behavior of the bray-liebhafsky oscillatory reaction controlled by sulfuric acid and temperature",
volume = "85",
number = "13",
pages = "2310-2316",
doi = "10.1134/S0036024411130231"
}

Pejić, N., Vujković, M., Maksimović, J., Ivanović, A., Anić, S., Čupić, Ž.,& Kolar-Anić, L.. (2011). Dynamic behavior of the bray-liebhafsky oscillatory reaction controlled by sulfuric acid and temperature. in SAR and QSAR in Environmental Research
Maik Nauka/Interperiodica/Springer, New York., 85(13), 2310-2316.
https://doi.org/10.1134/S0036024411130231

Pejić N, Vujković M, Maksimović J, Ivanović A, Anić S, Čupić Ž, Kolar-Anić L. Dynamic behavior of the bray-liebhafsky oscillatory reaction controlled by sulfuric acid and temperature. in SAR and QSAR in Environmental Research. 2011;85(13):2310-2316.
doi:10.1134/S0036024411130231 .

Pejić, Nataša, Vujković, Milica, Maksimović, Jelena, Ivanović, A., Anić, Slobodan, Čupić, Željko, Kolar-Anić, Ljiljana, "Dynamic behavior of the bray-liebhafsky oscillatory reaction controlled by sulfuric acid and temperature" in SAR and QSAR in Environmental Research, 85, no. 13 (2011):2310-2316,
https://doi.org/10.1134/S0036024411130231 . .