TY  - JOUR
AU  - Avramov Ivić, Milka
AU  - Antanasijevic, Jelena
AU  - Trišović, Nemanja
AU  - Antanasijevic, Davor
AU  - Lović, Jelena
AU  - Mijin, Dušan
AU  - Petrović, Slobodan D.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1941
AB  - The electrochemical behavior of phenobarbital sodium (PBS), paracetamol (PCM) and their binary mixtures was investigated using cyclic voltammetry (CV) and square wave voltammetry (SWV) at a bare gold electrode in a 0.05 M bicarbonate solution. A calibration curve of PBS obtained by SWV had two linear ranges, from 1.0 to 3.0 mu M and from 5.0 to 35.0 mu M with a limit of quantification (LOQ) of 0.62 mu M and a limit of detection (LOD) of 0.19 mu M, while a calibration curve of PCM was determined within the range from 10.0 to 50.0 mu M with a LOQ of 8.53 mu M and a LOD of 2.56 mu M. Both drugs underwent oxidation by irreversible, diffusion controlled process. The SW voltammograms of the drug mixtures produced complex, overlapping profiles and a chemometric method was applied for their decomposition. Two different artificial neural network (ANN) architectures, namely back-propagation neural network (BPNN) and general regression neural network (GRNN) were employed for the simultaneous prediction of the concentrations of the drugs in a synthetic sample. The BPNN model had higher accuracy (mean absolute percentage error values were in the range of 3.6-8.4%) and thus it can be used for the simultaneous determination of PBS and PCM.
PB  - Esg, Belgrade
T2  - International Journal of Electrochemical Science
T1  - A Chemometrical Analysis of Voltammetric Data for Simultaneous Determination of Phenobarbital Sodium and Paracetamol Obtained at a Gold Electrode
VL  - 11
IS  - 7
SP  - 5935
EP  - 5951
DO  - 10.20964/2016.07.48
ER  - 

@article{
author = "Avramov Ivić, Milka and Antanasijevic, Jelena and Trišović, Nemanja and Antanasijevic, Davor and Lović, Jelena and Mijin, Dušan and Petrović, Slobodan D.",
year = "2016",
abstract = "The electrochemical behavior of phenobarbital sodium (PBS), paracetamol (PCM) and their binary mixtures was investigated using cyclic voltammetry (CV) and square wave voltammetry (SWV) at a bare gold electrode in a 0.05 M bicarbonate solution. A calibration curve of PBS obtained by SWV had two linear ranges, from 1.0 to 3.0 mu M and from 5.0 to 35.0 mu M with a limit of quantification (LOQ) of 0.62 mu M and a limit of detection (LOD) of 0.19 mu M, while a calibration curve of PCM was determined within the range from 10.0 to 50.0 mu M with a LOQ of 8.53 mu M and a LOD of 2.56 mu M. Both drugs underwent oxidation by irreversible, diffusion controlled process. The SW voltammograms of the drug mixtures produced complex, overlapping profiles and a chemometric method was applied for their decomposition. Two different artificial neural network (ANN) architectures, namely back-propagation neural network (BPNN) and general regression neural network (GRNN) were employed for the simultaneous prediction of the concentrations of the drugs in a synthetic sample. The BPNN model had higher accuracy (mean absolute percentage error values were in the range of 3.6-8.4%) and thus it can be used for the simultaneous determination of PBS and PCM.",
publisher = "Esg, Belgrade",
journal = "International Journal of Electrochemical Science",
title = "A Chemometrical Analysis of Voltammetric Data for Simultaneous Determination of Phenobarbital Sodium and Paracetamol Obtained at a Gold Electrode",
volume = "11",
number = "7",
pages = "5935-5951",
doi = "10.20964/2016.07.48"
}

Avramov Ivić, M., Antanasijevic, J., Trišović, N., Antanasijevic, D., Lović, J., Mijin, D.,& Petrović, S. D.. (2016). A Chemometrical Analysis of Voltammetric Data for Simultaneous Determination of Phenobarbital Sodium and Paracetamol Obtained at a Gold Electrode. in International Journal of Electrochemical Science
Esg, Belgrade., 11(7), 5935-5951.
https://doi.org/10.20964/2016.07.48

Avramov Ivić M, Antanasijevic J, Trišović N, Antanasijevic D, Lović J, Mijin D, Petrović SD. A Chemometrical Analysis of Voltammetric Data for Simultaneous Determination of Phenobarbital Sodium and Paracetamol Obtained at a Gold Electrode. in International Journal of Electrochemical Science. 2016;11(7):5935-5951.
doi:10.20964/2016.07.48 .

Avramov Ivić, Milka, Antanasijevic, Jelena, Trišović, Nemanja, Antanasijevic, Davor, Lović, Jelena, Mijin, Dušan, Petrović, Slobodan D., "A Chemometrical Analysis of Voltammetric Data for Simultaneous Determination of Phenobarbital Sodium and Paracetamol Obtained at a Gold Electrode" in International Journal of Electrochemical Science, 11, no. 7 (2016):5935-5951,
https://doi.org/10.20964/2016.07.48 . .

TY  - JOUR
AU  - Tolic, Ljiljana
AU  - Lović, Jelena
AU  - Petrović, Slobodan D.
AU  - Mijin, Dušan
AU  - Grujic, Svetlana
AU  - Lausevic, Mila
AU  - Avramov Ivić, Milka
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1725
AB  - Anisomycin is an immunosuppressant in low doses ( LT 0.1 mu M) with possible application in treatment of some autoimmune diseases and in inhibiting transplantation rejection. Anisomycin suppresses malignant tumor cell growth and affects memory. For the first time it was the subject of the electrochemical investigations by cyclic voltammetry and square wave voltammetry on gold electrode in 0.05 M NaHCO3 using its electrochemical activity. The cyclic voltammetry experiments at different sweep rates show that electrochemical process is irreversible and diffusion controlled. Based on square wave voltammetry measurements, the calculated values of LOD and LOQ were 1 and 4 nM (in the absence of biological fluid), as well as 2 and 6 nM (in the presence of spiked urine) indicating the high sensitivity of the proposed electroanalytical method. High performance liquid chromatography-tandem mass spectrometry was a reference method for quantification of anisomycin and served for structural identification of its hydrolysis product (deacetylanisomycin).
PB  - Elsevier Science Inc, New York
T2  - Electrochemistry Communications
T1  - Investigation of electrochemical behavior of anisomycin on gold electrode followed by HPLC-MS/MS analysis
VL  - 58
SP  - 20
EP  - 24
DO  - 10.1016/j.elecom.2015.05.017
ER  - 

@article{
author = "Tolic, Ljiljana and Lović, Jelena and Petrović, Slobodan D. and Mijin, Dušan and Grujic, Svetlana and Lausevic, Mila and Avramov Ivić, Milka",
year = "2015",
abstract = "Anisomycin is an immunosuppressant in low doses ( LT 0.1 mu M) with possible application in treatment of some autoimmune diseases and in inhibiting transplantation rejection. Anisomycin suppresses malignant tumor cell growth and affects memory. For the first time it was the subject of the electrochemical investigations by cyclic voltammetry and square wave voltammetry on gold electrode in 0.05 M NaHCO3 using its electrochemical activity. The cyclic voltammetry experiments at different sweep rates show that electrochemical process is irreversible and diffusion controlled. Based on square wave voltammetry measurements, the calculated values of LOD and LOQ were 1 and 4 nM (in the absence of biological fluid), as well as 2 and 6 nM (in the presence of spiked urine) indicating the high sensitivity of the proposed electroanalytical method. High performance liquid chromatography-tandem mass spectrometry was a reference method for quantification of anisomycin and served for structural identification of its hydrolysis product (deacetylanisomycin).",
publisher = "Elsevier Science Inc, New York",
journal = "Electrochemistry Communications",
title = "Investigation of electrochemical behavior of anisomycin on gold electrode followed by HPLC-MS/MS analysis",
volume = "58",
pages = "20-24",
doi = "10.1016/j.elecom.2015.05.017"
}

Tolic, L., Lović, J., Petrović, S. D., Mijin, D., Grujic, S., Lausevic, M.,& Avramov Ivić, M.. (2015). Investigation of electrochemical behavior of anisomycin on gold electrode followed by HPLC-MS/MS analysis. in Electrochemistry Communications
Elsevier Science Inc, New York., 58, 20-24.
https://doi.org/10.1016/j.elecom.2015.05.017

Tolic L, Lović J, Petrović SD, Mijin D, Grujic S, Lausevic M, Avramov Ivić M. Investigation of electrochemical behavior of anisomycin on gold electrode followed by HPLC-MS/MS analysis. in Electrochemistry Communications. 2015;58:20-24.
doi:10.1016/j.elecom.2015.05.017 .

Tolic, Ljiljana, Lović, Jelena, Petrović, Slobodan D., Mijin, Dušan, Grujic, Svetlana, Lausevic, Mila, Avramov Ivić, Milka, "Investigation of electrochemical behavior of anisomycin on gold electrode followed by HPLC-MS/MS analysis" in Electrochemistry Communications, 58 (2015):20-24,
https://doi.org/10.1016/j.elecom.2015.05.017 . .

TY  - JOUR
AU  - Jovanovic, Zoran
AU  - Kalijadis, Ana
AU  - Vasiljević-Radović, Dana
AU  - Eric, Marko
AU  - Lausevic, Mila
AU  - Mentus, Slavko
AU  - Laušević, Zoran
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/796
AB  - Glassy carbon plates were irradiated with 15 key H(+) ion-beam in the fluence range of 1 x 10(16)-3 x 10(18) ion cm(-2). The influence of ion irradiation on surface morphology and topology was examined by scanning electron and atomic force microscopy. Structural changes were monitored by Raman spectrometry, while changes of wettability and the content of surface oxygen complexes were examined by contact angle measurements and temperature programmed desorption. Elastic recoil detection analysis was applied for determination of hydrogen concentration profiles in irradiated samples. Cyclic voltammetry was used for the assessment of the electrochemical properties of modified glassy carbon electrodes. It was concluded that there is critical fluence range (2 x 10(17)-5 x 10(17) ion cm(-2)) inside of which significant changes of glassy carbon properties occur.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Carbon
T1  - Modification of glassy carbon properties under low energy proton irradiation
VL  - 49
IS  - 12
SP  - 3737
EP  - 3746
DO  - 10.1016/j.carbon.2011.05.006
ER  - 

@article{
author = "Jovanovic, Zoran and Kalijadis, Ana and Vasiljević-Radović, Dana and Eric, Marko and Lausevic, Mila and Mentus, Slavko and Laušević, Zoran",
year = "2011",
abstract = "Glassy carbon plates were irradiated with 15 key H(+) ion-beam in the fluence range of 1 x 10(16)-3 x 10(18) ion cm(-2). The influence of ion irradiation on surface morphology and topology was examined by scanning electron and atomic force microscopy. Structural changes were monitored by Raman spectrometry, while changes of wettability and the content of surface oxygen complexes were examined by contact angle measurements and temperature programmed desorption. Elastic recoil detection analysis was applied for determination of hydrogen concentration profiles in irradiated samples. Cyclic voltammetry was used for the assessment of the electrochemical properties of modified glassy carbon electrodes. It was concluded that there is critical fluence range (2 x 10(17)-5 x 10(17) ion cm(-2)) inside of which significant changes of glassy carbon properties occur.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Carbon",
title = "Modification of glassy carbon properties under low energy proton irradiation",
volume = "49",
number = "12",
pages = "3737-3746",
doi = "10.1016/j.carbon.2011.05.006"
}

Jovanovic, Z., Kalijadis, A., Vasiljević-Radović, D., Eric, M., Lausevic, M., Mentus, S.,& Laušević, Z.. (2011). Modification of glassy carbon properties under low energy proton irradiation. in Carbon
Oxford : Pergamon-Elsevier Science Ltd., 49(12), 3737-3746.
https://doi.org/10.1016/j.carbon.2011.05.006

Jovanovic Z, Kalijadis A, Vasiljević-Radović D, Eric M, Lausevic M, Mentus S, Laušević Z. Modification of glassy carbon properties under low energy proton irradiation. in Carbon. 2011;49(12):3737-3746.
doi:10.1016/j.carbon.2011.05.006 .

Jovanovic, Zoran, Kalijadis, Ana, Vasiljević-Radović, Dana, Eric, Marko, Lausevic, Mila, Mentus, Slavko, Laušević, Zoran, "Modification of glassy carbon properties under low energy proton irradiation" in Carbon, 49, no. 12 (2011):3737-3746,
https://doi.org/10.1016/j.carbon.2011.05.006 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristic, Mirjana D.
AU  - Peric-Grujic, Aleksandra A.
AU  - Filipovic, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/800
AB  - A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles.
PB  - Elsevier
T2  - Colloids and Surfaces A-Physicochemical and Engineering Aspects
T1  - Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study
VL  - 388
IS  - 1-3
SP  - 59
EP  - 69
DO  - 10.1016/j.colsurfa.2011.08.011
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristic, Mirjana D. and Peric-Grujic, Aleksandra A. and Filipovic, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles.",
publisher = "Elsevier",
journal = "Colloids and Surfaces A-Physicochemical and Engineering Aspects",
title = "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study",
volume = "388",
number = "1-3",
pages = "59-69",
doi = "10.1016/j.colsurfa.2011.08.011"
}

Milosavljevic, N. B., Ristic, M. D., Peric-Grujic, A. A., Filipovic, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces A-Physicochemical and Engineering Aspects
Elsevier., 388(1-3), 59-69.
https://doi.org/10.1016/j.colsurfa.2011.08.011

Milosavljevic NB, Ristic MD, Peric-Grujic AA, Filipovic JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces A-Physicochemical and Engineering Aspects. 2011;388(1-3):59-69.
doi:10.1016/j.colsurfa.2011.08.011 .

Milosavljevic, Nedeljko B., Ristic, Mirjana D., Peric-Grujic, Aleksandra A., Filipovic, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study" in Colloids and Surfaces A-Physicochemical and Engineering Aspects, 388, no. 1-3 (2011):59-69,
https://doi.org/10.1016/j.colsurfa.2011.08.011 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristic, Mirjana D.
AU  - Peric-Grujic, Aleksandra A.
AU  - Filipovic, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/805
AB  - Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature.
PB  - Elsevier
T2  - Journal of Hazardous Materials
T1  - Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid
VL  - 192
IS  - 2
SP  - 846
EP  - 854
DO  - 10.1016/j.jhazmat.2011.05.093
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristic, Mirjana D. and Peric-Grujic, Aleksandra A. and Filipovic, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature.",
publisher = "Elsevier",
journal = "Journal of Hazardous Materials",
title = "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid",
volume = "192",
number = "2",
pages = "846-854",
doi = "10.1016/j.jhazmat.2011.05.093"
}

Milosavljevic, N. B., Ristic, M. D., Peric-Grujic, A. A., Filipovic, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials
Elsevier., 192(2), 846-854.
https://doi.org/10.1016/j.jhazmat.2011.05.093

Milosavljevic NB, Ristic MD, Peric-Grujic AA, Filipovic JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials. 2011;192(2):846-854.
doi:10.1016/j.jhazmat.2011.05.093 .

Milosavljevic, Nedeljko B., Ristic, Mirjana D., Peric-Grujic, Aleksandra A., Filipovic, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid" in Journal of Hazardous Materials, 192, no. 2 (2011):846-854,
https://doi.org/10.1016/j.jhazmat.2011.05.093 . .