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  - Blagojević, Slavica
AU  - Erić, Nataša
AU  - Nešović, Milica
AU  - Blagojević, Stevan N.
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3555
AB  - The micellization behavior and foamability of a mixture of anionic surfactant sodium laureth sulfate (SLES) and nonionic polysorbate surfactants commercially available as Tween series were investigated. The mole fraction and the structure of the hydrophobic part of various polysorbates affect the critical micellar concentration (CMC) and foam height and stability of anionic surfactant. Experimental values of CMC were determined by measuring specific conductivity at 25°C and foam height and stability by modified Ross–Miles method at 23°C. The negative deviation of the experimentally determined CMC from theoretical values for ideal mixed micelle indicate non-ideal mixing behavior due to synergism as a consequence of attractive interactions between the individual surfactants in formed micelles. Thus synergism increase with increasing of both the mole fraction and length of hydrophobic tail of examined Tween in SLES/Tween mixtures. Foam height and stability significantly decrease with increasing length of the hydrophobic tail of Tween surfactants and their mole fractions in the binary mixture.
PB  - Springer
T2  - Russian Journal of Physical Chemistry A
T1  - Micellization and Foamability of Sodium Laureth Sulfate and Polysorbate Surfactant Mixtures
VL  - 93
IS  - 13
SP  - 2804
EP  - 2811
DO  - 10.1134/S0036024419130053
ER  - 

@article{
author = "Blagojević, Slavica and Erić, Nataša and Nešović, Milica and Blagojević, Stevan N.",
year = "2019",
abstract = "The micellization behavior and foamability of a mixture of anionic surfactant sodium laureth sulfate (SLES) and nonionic polysorbate surfactants commercially available as Tween series were investigated. The mole fraction and the structure of the hydrophobic part of various polysorbates affect the critical micellar concentration (CMC) and foam height and stability of anionic surfactant. Experimental values of CMC were determined by measuring specific conductivity at 25°C and foam height and stability by modified Ross–Miles method at 23°C. The negative deviation of the experimentally determined CMC from theoretical values for ideal mixed micelle indicate non-ideal mixing behavior due to synergism as a consequence of attractive interactions between the individual surfactants in formed micelles. Thus synergism increase with increasing of both the mole fraction and length of hydrophobic tail of examined Tween in SLES/Tween mixtures. Foam height and stability significantly decrease with increasing length of the hydrophobic tail of Tween surfactants and their mole fractions in the binary mixture.",
publisher = "Springer",
journal = "Russian Journal of Physical Chemistry A",
title = "Micellization and Foamability of Sodium Laureth Sulfate and Polysorbate Surfactant Mixtures",
volume = "93",
number = "13",
pages = "2804-2811",
doi = "10.1134/S0036024419130053"
}

Blagojević, S., Erić, N., Nešović, M.,& Blagojević, S. N.. (2019). Micellization and Foamability of Sodium Laureth Sulfate and Polysorbate Surfactant Mixtures. in Russian Journal of Physical Chemistry A
Springer., 93(13), 2804-2811.
https://doi.org/10.1134/S0036024419130053

Blagojević S, Erić N, Nešović M, Blagojević SN. Micellization and Foamability of Sodium Laureth Sulfate and Polysorbate Surfactant Mixtures. in Russian Journal of Physical Chemistry A. 2019;93(13):2804-2811.
doi:10.1134/S0036024419130053 .

Blagojević, Slavica, Erić, Nataša, Nešović, Milica, Blagojević, Stevan N., "Micellization and Foamability of Sodium Laureth Sulfate and Polysorbate Surfactant Mixtures" in Russian Journal of Physical Chemistry A, 93, no. 13 (2019):2804-2811,
https://doi.org/10.1134/S0036024419130053 . .

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  - Cervellati, Rinaldo
AU  - Greco, Emanuela
AU  - Blagojević, Slavica
AU  - Blagojević, Stevan
AU  - Anić, Slobodan
AU  - Čupić, Željko
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3202
AB  - The system KSCN-H2O2-CuSO4-NaOH, also known as the OrbA n-Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the OrbA n-Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original OrbA n-Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity.
PB  - Springer, Dordrecht
T2  - Records of Natural Products
T1  - Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction
VL  - 123
IS  - 1
SP  - 125
EP  - 139
DO  - 10.1007/s11144-017-1306-8
ER  - 

@article{
author = "Cervellati, Rinaldo and Greco, Emanuela and Blagojević, Slavica and Blagojević, Stevan and Anić, Slobodan and Čupić, Željko",
year = "2018",
abstract = "The system KSCN-H2O2-CuSO4-NaOH, also known as the OrbA n-Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the OrbA n-Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original OrbA n-Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity.",
publisher = "Springer, Dordrecht",
journal = "Records of Natural Products",
title = "Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction",
volume = "123",
number = "1",
pages = "125-139",
doi = "10.1007/s11144-017-1306-8"
}

Cervellati, R., Greco, E., Blagojević, S., Blagojević, S., Anić, S.,& Čupić, Ž.. (2018). Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction. in Records of Natural Products
Springer, Dordrecht., 123(1), 125-139.
https://doi.org/10.1007/s11144-017-1306-8

Cervellati R, Greco E, Blagojević S, Blagojević S, Anić S, Čupić Ž. Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction. in Records of Natural Products. 2018;123(1):125-139.
doi:10.1007/s11144-017-1306-8 .

Cervellati, Rinaldo, Greco, Emanuela, Blagojević, Slavica, Blagojević, Stevan, Anić, Slobodan, Čupić, Željko, "Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction" in Records of Natural Products, 123, no. 1 (2018):125-139,
https://doi.org/10.1007/s11144-017-1306-8 . .

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  - Čupić, Željko
AU  - Ivanović-Sasic, Ana
AU  - Blagojevic, Stevan
AU  - Blagojević, Slavica
AU  - Kolar-Anić, Ljiljana
AU  - Anić, Slobodan
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2545
AB  - By numerically simulated Bray-Liebhafsky (BL) reaction under a continuously fed well stirred tank reactor (CSTR) conditions, we discussed the attractors and Poincar, 1D maps with respect to flow rate as the control parameter. The new technique of the return maps from transient trajectories over the slow manifold is developed and applied in order to explore its multilayered structure related to dynamical states (periodic and aperiodic -chaotic oscillating modes) of the system. Kinetic relations underlying the slow manifold structure are briefly discussed.
PB  - Springer, Dordrecht
T2  - Records of Natural Products
T1  - Return map analysis of the highly nonlinear Bray-Liebhafsky reaction model
VL  - 118
IS  - 1
SP  - 27
EP  - 38
DO  - 10.1007/s11144-016-0998-5
ER  - 

@article{
author = "Čupić, Željko and Ivanović-Sasic, Ana and Blagojevic, Stevan and Blagojević, Slavica and Kolar-Anić, Ljiljana and Anić, Slobodan",
year = "2016",
abstract = "By numerically simulated Bray-Liebhafsky (BL) reaction under a continuously fed well stirred tank reactor (CSTR) conditions, we discussed the attractors and Poincar, 1D maps with respect to flow rate as the control parameter. The new technique of the return maps from transient trajectories over the slow manifold is developed and applied in order to explore its multilayered structure related to dynamical states (periodic and aperiodic -chaotic oscillating modes) of the system. Kinetic relations underlying the slow manifold structure are briefly discussed.",
publisher = "Springer, Dordrecht",
journal = "Records of Natural Products",
title = "Return map analysis of the highly nonlinear Bray-Liebhafsky reaction model",
volume = "118",
number = "1",
pages = "27-38",
doi = "10.1007/s11144-016-0998-5"
}

Čupić, Ž., Ivanović-Sasic, A., Blagojevic, S., Blagojević, S., Kolar-Anić, L.,& Anić, S.. (2016). Return map analysis of the highly nonlinear Bray-Liebhafsky reaction model. in Records of Natural Products
Springer, Dordrecht., 118(1), 27-38.
https://doi.org/10.1007/s11144-016-0998-5

Čupić Ž, Ivanović-Sasic A, Blagojevic S, Blagojević S, Kolar-Anić L, Anić S. Return map analysis of the highly nonlinear Bray-Liebhafsky reaction model. in Records of Natural Products. 2016;118(1):27-38.
doi:10.1007/s11144-016-0998-5 .

Čupić, Željko, Ivanović-Sasic, Ana, Blagojevic, Stevan, Blagojević, Slavica, Kolar-Anić, Ljiljana, Anić, Slobodan, "Return map analysis of the highly nonlinear Bray-Liebhafsky reaction model" in Records of Natural Products, 118, no. 1 (2016):27-38,
https://doi.org/10.1007/s11144-016-0998-5 . .

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  - Blagojević, Slavica
AU  - Blagojević, Stevan
AU  - Begović, Biljana
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2507
AB  - In order to evaluate the safety of selected commercial spices brands, concentration of lead, mercury and arsenic, as well as moisture and mineral contents were analyzed in samples of dried black and white pepper powders, black, white and green peppercorns, black cumin seeds and ginger powder. Lead (Pb), mercury (Hg) and arsenic (As) concentrations in spice samples purchased from local markets in Belgrade were determined, after a microwave digestion of the samples, by atomic absorption spectrometry (AAS), using the graphite furnace AAS technique (Pb), cold vapor AAS technique (Hg) and hydride generation AAS technique (As). Trace levels of Pb, Hg and As in the selected dried spices samples were in the range 0.10 ppm - 0.79 ppm, 0.01 ppm - 0.10 ppm and 0.01 ppm - 0.51 ppm, respectively. The maximum Pb concentration was determined in the sample of ginger and it was 0.79 ppm, the maximum concentration of Hg was 0.10 ppm, determined in green peppercorns samples, while the maximum concentration of As in powdered black pepper sample was 0.51 ppm. The moisture and mineral contents in the different analyzed spices were in the range 1.70-13.10% and 3.40-6.50%, respectively. According to the obtained results, the concentrations of the analyzed toxic elements, as well as the moisture and mineral content in selected spices, were below the maximum permissible limits declared by the national legislations deemed safe for human consumption.
AB  - U ovom radu, u cilju utvrđivanja bezbednosti odabranih komercijalnih začina, analizirane su koncentracije teških metala, kao i sadržaj vlage i ukupnih mineralnih materija, u uzorcima sušenog crnog i belog bibera u prahu, crnog, belog i zelenog bibera u zrnu, semena crnog kima i đumbira u prahu. Koncentracije olova (Pb), žive (Hg) i arsena (As) u uzorcima začina iz lokalnih prodavnica u Beogradu, određene su nakon mikrotalasne digestije atomskom apsorcionom spektrometrijom (AAS), primenom tehnike grafitne peći (Pb), tehnike hladne pare (Hg) i hidridne tehnike (As). Određene koncentracije Pb, Hg i As u uzorcima sušenih začina su u opsegu 0,10 ppm - 0,79 ppm, 0,01 ppm - 0,10 ppm i 0,01 ppm - 0,51 ppm, redom. Maksimalna koncentracija Pb od 0,79 ppm određena je u uzorku đumbira, maksimalna koncentracija Hg od 0,10 ppm u uzorcima zelenog bibera u zrnu, dok je maksimalna koncentracija As određena u uzorku crnog bibera u prahu i iznosila je 0,51 ppm. U uzorcima ispitivanih začina sadržaj vlage i mineralnih materija je u opsegu 1,70-13,10% i 3,40-6,50%, redom. Dobijeni rezultati pokazuju da su koncentracije ispitivanih teških metala, kao i sadržaj vlage i mineralnih materija ispod maksimalno dozvoljenih vrednosti propisanih zakonskom regulativom Republike Srbije, kao i da su ispitivani uzorci crnog, belog i zelenog bibera u prahu i zrnu, crnog kima u zrnu i đumbira u prahu propisanog kvaliteta u ovom smislu.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Physics, Chemistry and Technology
T1  - Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger
T1  - Sadržaj olova, žive i arsena u začinima - crni, beli i zeleni biber, crni kim i đumbir
VL  - 13
IS  - 3
SP  - 191
EP  - 202
DO  - 10.2298/FUPCT1503191B
ER  - 

@article{
author = "Blagojević, Slavica and Blagojević, Stevan and Begović, Biljana",
year = "2015",
abstract = "In order to evaluate the safety of selected commercial spices brands, concentration of lead, mercury and arsenic, as well as moisture and mineral contents were analyzed in samples of dried black and white pepper powders, black, white and green peppercorns, black cumin seeds and ginger powder. Lead (Pb), mercury (Hg) and arsenic (As) concentrations in spice samples purchased from local markets in Belgrade were determined, after a microwave digestion of the samples, by atomic absorption spectrometry (AAS), using the graphite furnace AAS technique (Pb), cold vapor AAS technique (Hg) and hydride generation AAS technique (As). Trace levels of Pb, Hg and As in the selected dried spices samples were in the range 0.10 ppm - 0.79 ppm, 0.01 ppm - 0.10 ppm and 0.01 ppm - 0.51 ppm, respectively. The maximum Pb concentration was determined in the sample of ginger and it was 0.79 ppm, the maximum concentration of Hg was 0.10 ppm, determined in green peppercorns samples, while the maximum concentration of As in powdered black pepper sample was 0.51 ppm. The moisture and mineral contents in the different analyzed spices were in the range 1.70-13.10% and 3.40-6.50%, respectively. According to the obtained results, the concentrations of the analyzed toxic elements, as well as the moisture and mineral content in selected spices, were below the maximum permissible limits declared by the national legislations deemed safe for human consumption., U ovom radu, u cilju utvrđivanja bezbednosti odabranih komercijalnih začina, analizirane su koncentracije teških metala, kao i sadržaj vlage i ukupnih mineralnih materija, u uzorcima sušenog crnog i belog bibera u prahu, crnog, belog i zelenog bibera u zrnu, semena crnog kima i đumbira u prahu. Koncentracije olova (Pb), žive (Hg) i arsena (As) u uzorcima začina iz lokalnih prodavnica u Beogradu, određene su nakon mikrotalasne digestije atomskom apsorcionom spektrometrijom (AAS), primenom tehnike grafitne peći (Pb), tehnike hladne pare (Hg) i hidridne tehnike (As). Određene koncentracije Pb, Hg i As u uzorcima sušenih začina su u opsegu 0,10 ppm - 0,79 ppm, 0,01 ppm - 0,10 ppm i 0,01 ppm - 0,51 ppm, redom. Maksimalna koncentracija Pb od 0,79 ppm određena je u uzorku đumbira, maksimalna koncentracija Hg od 0,10 ppm u uzorcima zelenog bibera u zrnu, dok je maksimalna koncentracija As određena u uzorku crnog bibera u prahu i iznosila je 0,51 ppm. U uzorcima ispitivanih začina sadržaj vlage i mineralnih materija je u opsegu 1,70-13,10% i 3,40-6,50%, redom. Dobijeni rezultati pokazuju da su koncentracije ispitivanih teških metala, kao i sadržaj vlage i mineralnih materija ispod maksimalno dozvoljenih vrednosti propisanih zakonskom regulativom Republike Srbije, kao i da su ispitivani uzorci crnog, belog i zelenog bibera u prahu i zrnu, crnog kima u zrnu i đumbira u prahu propisanog kvaliteta u ovom smislu.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Physics, Chemistry and Technology",
title = "Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger, Sadržaj olova, žive i arsena u začinima - crni, beli i zeleni biber, crni kim i đumbir",
volume = "13",
number = "3",
pages = "191-202",
doi = "10.2298/FUPCT1503191B"
}

Blagojević, S., Blagojević, S.,& Begović, B.. (2015). Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger. in Facta universitatis - series: Physics, Chemistry and Technology
Univerzitet u Nišu, Niš., 13(3), 191-202.
https://doi.org/10.2298/FUPCT1503191B

Blagojević S, Blagojević S, Begović B. Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger. in Facta universitatis - series: Physics, Chemistry and Technology. 2015;13(3):191-202.
doi:10.2298/FUPCT1503191B .

Blagojević, Slavica, Blagojević, Stevan, Begović, Biljana, "Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger" in Facta universitatis - series: Physics, Chemistry and Technology, 13, no. 3 (2015):191-202,
https://doi.org/10.2298/FUPCT1503191B . .

TY  - JOUR
AU  - Blagojević, Slavica
AU  - Pastor, Ferenc T.
AU  - Borić, Ivan
AU  - Erić, Nataša M.
AU  - Sužnjević, Desanka Ž.
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2493
AB  - Commercially formulated anti-dandruff shampoos contain zinc pyrithione (ZPT) as an active ingredient that has antifungal, antibacterial and anti-seborrheic properties. The determination of ZPT concentration in commercial anti-dandruff shampoos by differential pulse polarography (DPP) was based on the electrochemical reduction of zinc ions in ammoniacal buffer pH 10.2, and the linear dependence of the reduction differential pulse peak current at the potential - 1.33 V vs. concentration of zinc. Using the calibration curve method, it was found that the range of linearity for the determination of zinc concentration was from 1.28 x 10-5 to 1.39 x 10-4 mol L‒1 (linear regression equation: I = - 0.097 + 6.635 x 105c). Surface active ingredients and micro-components in the shampoos did not exert a polarographic interference for the determination of zinc and did not affect the indirect determination of the content of the active ingredient ZPT. The concentrations of zinc in the analyzed anti-dandruff shampoo samples were determined by the standard addition method, resulting in 4.20 x 10‒2 mol L‒1, 1.76 x 10‒1 mol L‒1 and 1.82 x 10‒1 mol L‒1. The results of DPP determinations of zinc and ZPT show that the content of ZPT was 0.28%, 1.15% i.e. 1.19% and was below the maximum recommended level of ZPT in anti-dandruff shampoos. This simple and sensitive differential pulse polarography method is suitable for a routine and rapid control of the active ingredient content, as well as for the quality control of anti-dandruff shampoos.
AB  - Aktivni sastojak komercijalno formulisanih šampona protiv peruti je cink-pirition, koji ima antifungalno, antibakterijsko i antiseboreično dejstvo. Određivanje cink-piritiona u šamponima protiv peruti primenom metode diferencijalne pulsne polarografije zasnivalo se na elektrohemijskoj redukciji jona cinka u amonijačnom puferu pH 10,2 i linearnoj zavisnosti intenziteta struje pika na redukcionom potencijalu - 1,33 V i koncentracije cinka. Metodom kalibracione krive je određen opseg linearnosti za određivanje koncentracije cinka od 1,28 x 10‒5 do 1,39 x 10‒4 mol L-1 i dobijena je linearna regresiona jednačina I = - 0,097 + 6,635 x 105c. Utvrđeno je da površinski aktivne komponente u matriksu šampona ne pokazuju polarografsku interferenciju i ne utiču na određivanje koncentracije cinka i sadržaja cink-piritiona u analiziranim šamponima. Koncentracije cinka u analiziranim uzorcima šampona određene su metodom standardnog dodatka i iznose 4,20 x 10‒2 mol L-1, 1,76 ' 10‒1 mol L-1 i 1,82 x 10‒1 mol L-1. Rezultati polarografskog određivanja cinka i sadržaja cink-piritiona pokazuju da su dobijene vrednosti cink-piritiona 0,28%, 1,15% i 1,19% ispod maksimalno preporučenog sadržaja cink-piritiona u šamponima protiv peruti. Ova jednostavna i osetljiva metoda diferencijalno pulsne polarografije pogodna je za rutinsko i brzo određivanje sadržaja aktivnog sastojka i kontrolu kvaliteta šampona protiv peruti.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Physics, Chemistry and Technology
T1  - The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos
T1  - Primena DP polarografije za određivanje cinka i sadržaja cink-piritiona u šamponima protiv peruti
VL  - 13
IS  - 3
SP  - 181
EP  - 190
DO  - 10.2298/FUPCT1503181B
ER  - 

@article{
author = "Blagojević, Slavica and Pastor, Ferenc T. and Borić, Ivan and Erić, Nataša M. and Sužnjević, Desanka Ž.",
year = "2015",
abstract = "Commercially formulated anti-dandruff shampoos contain zinc pyrithione (ZPT) as an active ingredient that has antifungal, antibacterial and anti-seborrheic properties. The determination of ZPT concentration in commercial anti-dandruff shampoos by differential pulse polarography (DPP) was based on the electrochemical reduction of zinc ions in ammoniacal buffer pH 10.2, and the linear dependence of the reduction differential pulse peak current at the potential - 1.33 V vs. concentration of zinc. Using the calibration curve method, it was found that the range of linearity for the determination of zinc concentration was from 1.28 x 10-5 to 1.39 x 10-4 mol L‒1 (linear regression equation: I = - 0.097 + 6.635 x 105c). Surface active ingredients and micro-components in the shampoos did not exert a polarographic interference for the determination of zinc and did not affect the indirect determination of the content of the active ingredient ZPT. The concentrations of zinc in the analyzed anti-dandruff shampoo samples were determined by the standard addition method, resulting in 4.20 x 10‒2 mol L‒1, 1.76 x 10‒1 mol L‒1 and 1.82 x 10‒1 mol L‒1. The results of DPP determinations of zinc and ZPT show that the content of ZPT was 0.28%, 1.15% i.e. 1.19% and was below the maximum recommended level of ZPT in anti-dandruff shampoos. This simple and sensitive differential pulse polarography method is suitable for a routine and rapid control of the active ingredient content, as well as for the quality control of anti-dandruff shampoos., Aktivni sastojak komercijalno formulisanih šampona protiv peruti je cink-pirition, koji ima antifungalno, antibakterijsko i antiseboreično dejstvo. Određivanje cink-piritiona u šamponima protiv peruti primenom metode diferencijalne pulsne polarografije zasnivalo se na elektrohemijskoj redukciji jona cinka u amonijačnom puferu pH 10,2 i linearnoj zavisnosti intenziteta struje pika na redukcionom potencijalu - 1,33 V i koncentracije cinka. Metodom kalibracione krive je određen opseg linearnosti za određivanje koncentracije cinka od 1,28 x 10‒5 do 1,39 x 10‒4 mol L-1 i dobijena je linearna regresiona jednačina I = - 0,097 + 6,635 x 105c. Utvrđeno je da površinski aktivne komponente u matriksu šampona ne pokazuju polarografsku interferenciju i ne utiču na određivanje koncentracije cinka i sadržaja cink-piritiona u analiziranim šamponima. Koncentracije cinka u analiziranim uzorcima šampona određene su metodom standardnog dodatka i iznose 4,20 x 10‒2 mol L-1, 1,76 ' 10‒1 mol L-1 i 1,82 x 10‒1 mol L-1. Rezultati polarografskog određivanja cinka i sadržaja cink-piritiona pokazuju da su dobijene vrednosti cink-piritiona 0,28%, 1,15% i 1,19% ispod maksimalno preporučenog sadržaja cink-piritiona u šamponima protiv peruti. Ova jednostavna i osetljiva metoda diferencijalno pulsne polarografije pogodna je za rutinsko i brzo određivanje sadržaja aktivnog sastojka i kontrolu kvaliteta šampona protiv peruti.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Physics, Chemistry and Technology",
title = "The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos, Primena DP polarografije za određivanje cinka i sadržaja cink-piritiona u šamponima protiv peruti",
volume = "13",
number = "3",
pages = "181-190",
doi = "10.2298/FUPCT1503181B"
}

Blagojević, S., Pastor, F. T., Borić, I., Erić, N. M.,& Sužnjević, D. Ž.. (2015). The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos. in Facta universitatis - series: Physics, Chemistry and Technology
Univerzitet u Nišu, Niš., 13(3), 181-190.
https://doi.org/10.2298/FUPCT1503181B

Blagojević S, Pastor FT, Borić I, Erić NM, Sužnjević DŽ. The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos. in Facta universitatis - series: Physics, Chemistry and Technology. 2015;13(3):181-190.
doi:10.2298/FUPCT1503181B .

Blagojević, Slavica, Pastor, Ferenc T., Borić, Ivan, Erić, Nataša M., Sužnjević, Desanka Ž., "The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos" in Facta universitatis - series: Physics, Chemistry and Technology, 13, no. 3 (2015):181-190,
https://doi.org/10.2298/FUPCT1503181B . .

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  - Bošnjaković-Pavlović, Nada
AU  - Stefanović, Marijana
AU  - Anić, Slobodan
AU  - Adnađević, Borivoj
AU  - Jeličić, Mihajlo
AU  - Lukić, Vera
AU  - Uskoković-Marković, Snežana
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2268
AB  - The prevalence of alcohol in blood samples from medicolegal autopsies performed in the Institute of Forensic Medicine in Belgrade, in 2011, was studied. In total, 293 blood samples were analyzed for alcohol by headspace gas chromatography. The blood alcohol concentrations were evaluated according to sex, age, and cause of death. The blood alcohol concentrations were . 0.5 g/L in 23.9% of the cases; in suicides 22.4%, accidents 34.4% and homicides 25.0%. The largest proportion of high BACs were found in the sample from subjects killed in traffic accidents. These findings confirm that alcohol use is an important factor in many fatal accidents, suicides and cases of violent death.
AB  - U ovom radu su razmatrani rezultati post mortem koncentracije alkohola (BAC) u 293 uzorka krvi dobijena na osnovu sudsko-medicinskih autopsija sprovedenih na Institutu za sudsku medicinu u Beogradu tokom 2011. godine. Gasna hromatografija sa headspace tehnikom (HS GH) se koristi kao rutinska i referentna metoda za određivanje alkohola. Podaci su analizirani prema godištu i polu žrtve u trenutku smrti i prema uzroku smrti. Od ukupnog broja žrtava, svaka treća žrtva je bila pod uticajem alkohola u momentu smrti. BAC je bila - 0.5 g/L u 23.9% slučajeva, i to 22.4% kod samoubistava, 34.4% kod nesrećnih slučajeva i 25.0% u slučajevima ubistava. Najveći procenat visokih vrednosti BAC utvrđen je u uzorcima subjekata nastradalih u saobraćajnim nesrećama. Kod žrtava saobraćajnih nesreća, od 42 slučaja pozitivnih na alkohol, 26 žrtava ima koncentracija alkohola u krvi veću od 2 g/L. 90% žrtava pozitivno testiranih na alkohola su muškarci.Analiza pokazuje da je alkohol visok faktor rizika kod mnogih fatalnih nesreća, samoubistava i slučajeva nasilne smrti. Podaci izneti u ovom radu svakako bi trebalo da pomognu u razumevanju uloge alkohola u momentu smrti ali i da skrenu pažnju celom društvu u borbi protiv alkoholizma.
PB  - Kriminalističko-policijski univerzitet, Beograd
T2  - Nauka, bezbednost, policija
T1  - Prevalence of post-mortem blood alcohol concentration among deaths in Serbia during 2011
T1  - Rezultati post mortem analize koncentracije alkohola u krvi u Srbiji tokom 2011 godine
IS  - 1
SP  - 161
EP  - 171
DO  - 10.5937/NBP1401161B
ER  - 

@article{
author = "Bošnjaković-Pavlović, Nada and Stefanović, Marijana and Anić, Slobodan and Adnađević, Borivoj and Jeličić, Mihajlo and Lukić, Vera and Uskoković-Marković, Snežana",
year = "2014",
abstract = "The prevalence of alcohol in blood samples from medicolegal autopsies performed in the Institute of Forensic Medicine in Belgrade, in 2011, was studied. In total, 293 blood samples were analyzed for alcohol by headspace gas chromatography. The blood alcohol concentrations were evaluated according to sex, age, and cause of death. The blood alcohol concentrations were . 0.5 g/L in 23.9% of the cases; in suicides 22.4%, accidents 34.4% and homicides 25.0%. The largest proportion of high BACs were found in the sample from subjects killed in traffic accidents. These findings confirm that alcohol use is an important factor in many fatal accidents, suicides and cases of violent death., U ovom radu su razmatrani rezultati post mortem koncentracije alkohola (BAC) u 293 uzorka krvi dobijena na osnovu sudsko-medicinskih autopsija sprovedenih na Institutu za sudsku medicinu u Beogradu tokom 2011. godine. Gasna hromatografija sa headspace tehnikom (HS GH) se koristi kao rutinska i referentna metoda za određivanje alkohola. Podaci su analizirani prema godištu i polu žrtve u trenutku smrti i prema uzroku smrti. Od ukupnog broja žrtava, svaka treća žrtva je bila pod uticajem alkohola u momentu smrti. BAC je bila - 0.5 g/L u 23.9% slučajeva, i to 22.4% kod samoubistava, 34.4% kod nesrećnih slučajeva i 25.0% u slučajevima ubistava. Najveći procenat visokih vrednosti BAC utvrđen je u uzorcima subjekata nastradalih u saobraćajnim nesrećama. Kod žrtava saobraćajnih nesreća, od 42 slučaja pozitivnih na alkohol, 26 žrtava ima koncentracija alkohola u krvi veću od 2 g/L. 90% žrtava pozitivno testiranih na alkohola su muškarci.Analiza pokazuje da je alkohol visok faktor rizika kod mnogih fatalnih nesreća, samoubistava i slučajeva nasilne smrti. Podaci izneti u ovom radu svakako bi trebalo da pomognu u razumevanju uloge alkohola u momentu smrti ali i da skrenu pažnju celom društvu u borbi protiv alkoholizma.",
publisher = "Kriminalističko-policijski univerzitet, Beograd",
journal = "Nauka, bezbednost, policija",
title = "Prevalence of post-mortem blood alcohol concentration among deaths in Serbia during 2011, Rezultati post mortem analize koncentracije alkohola u krvi u Srbiji tokom 2011 godine",
number = "1",
pages = "161-171",
doi = "10.5937/NBP1401161B"
}

Bošnjaković-Pavlović, N., Stefanović, M., Anić, S., Adnađević, B., Jeličić, M., Lukić, V.,& Uskoković-Marković, S.. (2014). Prevalence of post-mortem blood alcohol concentration among deaths in Serbia during 2011. in Nauka, bezbednost, policija
Kriminalističko-policijski univerzitet, Beograd.(1), 161-171.
https://doi.org/10.5937/NBP1401161B

Bošnjaković-Pavlović N, Stefanović M, Anić S, Adnađević B, Jeličić M, Lukić V, Uskoković-Marković S. Prevalence of post-mortem blood alcohol concentration among deaths in Serbia during 2011. in Nauka, bezbednost, policija. 2014;(1):161-171.
doi:10.5937/NBP1401161B .

Bošnjaković-Pavlović, Nada, Stefanović, Marijana, Anić, Slobodan, Adnađević, Borivoj, Jeličić, Mihajlo, Lukić, Vera, Uskoković-Marković, Snežana, "Prevalence of post-mortem blood alcohol concentration among deaths in Serbia during 2011" in Nauka, bezbednost, policija, no. 1 (2014):161-171,
https://doi.org/10.5937/NBP1401161B . .

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 .