TY  - CONF
AU  - Mutić, Jelena
AU  - Tešić, Živoslav
AU  - Stefanović, Violeta
AU  - Popović, Gordana
AU  - Skrivanj, Sandra
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5361
AB  - The consumption of wild growing mushrooms has been increasing in many countries. Especially in Eastern and central Europe mushrooms have high commercial value. In this study, 40 samples of Parasol Mushroom (Macrolepiota procera) [1-3] were collected in the vicinity of Krusevac and Trstenik, Serbia in autumn during 2011 year. Metal concentrations in caps and stipes of fruiting bodies were determined by inductively coupled plasma-mass spectroscopy (ICP-MS) and inductively coupled plasma atomic emission spectroscopy (ICP-OES). Translocation factor was calculated for stalk and cups. Translocation is the process leading to the redistribution of a chemical substance, once it has been deposited on the parts of a plant, to the other parts that have not been contaminated directly. Translocation is important in predicting the contamination of edible parts of those plants that are not consumed whole.The mushroom samples were prepared for analysis using microwave acid digestion procedure (7 ml HNO3 and 1 ml H2O2). The following elements were analized: Cd, Cu, Mn, Fe, and Zn. The analytical accuracy of the method was evaluated by using the Standard Reference Materials (TORT-2, lobster hepatopancreas reference material for trace metals). The distribution of metals in samples was investigated and discussed. Correlation analysis and two multivariate analysis methods (principal component analysis and cluster analysis) were carried out in order to provide better understanding of the nature of associations of trace elements in mushrooms.
PB  - Serbian Chemical Society
C3  - ICOSECS 8, 8th International Conference of the Chemical Societies of the South-East European Countries, BOOK OF ABSTRACTS, Belgrade, Serbia, June 27-29
T1  - Uptake of cadmium, copper, iron, manganese, and zinc in some wild edible mushrooms from Serbian forest
SP  - 46
EP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5361
ER  - 

@conference{
author = "Mutić, Jelena and Tešić, Živoslav and Stefanović, Violeta and Popović, Gordana and Skrivanj, Sandra",
year = "2013",
abstract = "The consumption of wild growing mushrooms has been increasing in many countries. Especially in Eastern and central Europe mushrooms have high commercial value. In this study, 40 samples of Parasol Mushroom (Macrolepiota procera) [1-3] were collected in the vicinity of Krusevac and Trstenik, Serbia in autumn during 2011 year. Metal concentrations in caps and stipes of fruiting bodies were determined by inductively coupled plasma-mass spectroscopy (ICP-MS) and inductively coupled plasma atomic emission spectroscopy (ICP-OES). Translocation factor was calculated for stalk and cups. Translocation is the process leading to the redistribution of a chemical substance, once it has been deposited on the parts of a plant, to the other parts that have not been contaminated directly. Translocation is important in predicting the contamination of edible parts of those plants that are not consumed whole.The mushroom samples were prepared for analysis using microwave acid digestion procedure (7 ml HNO3 and 1 ml H2O2). The following elements were analized: Cd, Cu, Mn, Fe, and Zn. The analytical accuracy of the method was evaluated by using the Standard Reference Materials (TORT-2, lobster hepatopancreas reference material for trace metals). The distribution of metals in samples was investigated and discussed. Correlation analysis and two multivariate analysis methods (principal component analysis and cluster analysis) were carried out in order to provide better understanding of the nature of associations of trace elements in mushrooms.",
publisher = "Serbian Chemical Society",
journal = "ICOSECS 8, 8th International Conference of the Chemical Societies of the South-East European Countries, BOOK OF ABSTRACTS, Belgrade, Serbia, June 27-29",
title = "Uptake of cadmium, copper, iron, manganese, and zinc in some wild edible mushrooms from Serbian forest",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5361"
}

Mutić, J., Tešić, Ž., Stefanović, V., Popović, G.,& Skrivanj, S.. (2013). Uptake of cadmium, copper, iron, manganese, and zinc in some wild edible mushrooms from Serbian forest. in ICOSECS 8, 8th International Conference of the Chemical Societies of the South-East European Countries, BOOK OF ABSTRACTS, Belgrade, Serbia, June 27-29
Serbian Chemical Society., 46-46.
https://hdl.handle.net/21.15107/rcub_farfar_5361

Mutić J, Tešić Ž, Stefanović V, Popović G, Skrivanj S. Uptake of cadmium, copper, iron, manganese, and zinc in some wild edible mushrooms from Serbian forest. in ICOSECS 8, 8th International Conference of the Chemical Societies of the South-East European Countries, BOOK OF ABSTRACTS, Belgrade, Serbia, June 27-29. 2013;:46-46.
https://hdl.handle.net/21.15107/rcub_farfar_5361 .

Mutić, Jelena, Tešić, Živoslav, Stefanović, Violeta, Popović, Gordana, Skrivanj, Sandra, "Uptake of cadmium, copper, iron, manganese, and zinc in some wild edible mushrooms from Serbian forest" in ICOSECS 8, 8th International Conference of the Chemical Societies of the South-East European Countries, BOOK OF ABSTRACTS, Belgrade, Serbia, June 27-29 (2013):46-46,
https://hdl.handle.net/21.15107/rcub_farfar_5361 .

TY  - JOUR
AU  - Popović, Gordana
AU  - Sladić, Dušan
AU  - Stefanović, Violeta M.
AU  - Pfendt, Lidija
PY  - 2003
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/418
AB  - Protolytic equilibria in homogeneous and heterogeneous systems of lorazepam and oxazepam, which are sparingly soluble ampholytes from the class of 1,4-benzodiazepines, were studied at 25 degreesC and ionic strength of 0.1 M. Acidity constants and equilibrium constants in a heterogeneous system were determined. On the basis of the analysis of the corresponding C-13- and H-1-NMR spectra, deprotonation site in the molecules of the investigated compounds was predicted. Finally, the correlation between chemical shifts in the H-1-NMR spectra and the acidity of the amide proton of 1,4-benzodiazepines was established.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Journal of Pharmaceutical and Biomedical Analysis
T1  - Study on protolytic equilibria of lorazepam and oxazepam by UV and NMR spectroscopy
VL  - 31
IS  - 4
SP  - 693
EP  - 699
DO  - 10.1016/S0731-7085(02)00686-6
ER  - 

@article{
author = "Popović, Gordana and Sladić, Dušan and Stefanović, Violeta M. and Pfendt, Lidija",
year = "2003",
abstract = "Protolytic equilibria in homogeneous and heterogeneous systems of lorazepam and oxazepam, which are sparingly soluble ampholytes from the class of 1,4-benzodiazepines, were studied at 25 degreesC and ionic strength of 0.1 M. Acidity constants and equilibrium constants in a heterogeneous system were determined. On the basis of the analysis of the corresponding C-13- and H-1-NMR spectra, deprotonation site in the molecules of the investigated compounds was predicted. Finally, the correlation between chemical shifts in the H-1-NMR spectra and the acidity of the amide proton of 1,4-benzodiazepines was established.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Journal of Pharmaceutical and Biomedical Analysis",
title = "Study on protolytic equilibria of lorazepam and oxazepam by UV and NMR spectroscopy",
volume = "31",
number = "4",
pages = "693-699",
doi = "10.1016/S0731-7085(02)00686-6"
}

Popović, G., Sladić, D., Stefanović, V. M.,& Pfendt, L.. (2003). Study on protolytic equilibria of lorazepam and oxazepam by UV and NMR spectroscopy. in Journal of Pharmaceutical and Biomedical Analysis
Pergamon-Elsevier Science Ltd, Oxford., 31(4), 693-699.
https://doi.org/10.1016/S0731-7085(02)00686-6

Popović G, Sladić D, Stefanović VM, Pfendt L. Study on protolytic equilibria of lorazepam and oxazepam by UV and NMR spectroscopy. in Journal of Pharmaceutical and Biomedical Analysis. 2003;31(4):693-699.
doi:10.1016/S0731-7085(02)00686-6 .

Popović, Gordana, Sladić, Dušan, Stefanović, Violeta M., Pfendt, Lidija, "Study on protolytic equilibria of lorazepam and oxazepam by UV and NMR spectroscopy" in Journal of Pharmaceutical and Biomedical Analysis, 31, no. 4 (2003):693-699,
https://doi.org/10.1016/S0731-7085(02)00686-6 . .

TY  - JOUR
AU  - Popović, Gordana
AU  - Pfendt, Lidija
AU  - Stefanović, Violeta M.
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/260
AB  - 1. Introduction 2. Basic characteristics of derivative spectrophotometry 2.1. Increase of spectra resolution 2.2. Elimination of the influence of baseline shift and matrix interferences 2.3. Enhancement of the detectability of minor spectral features 2.4. Precise determination of the positions of absorption maxima 2.5. Signal-to-noise ratio (SNR) 2.6. Quantitative analysis 3. Analytical applications 3.1. Inorganic analysis 3.2. Organic and pharmaceutical analysis 3.3. Analysis of food and water 3.4. Application of derivative spectrophotometry for the determination of equilibrium constants.
AB  - Razmatrani su osnovni principi derivativne spektrofotometrije (DS) i njene prednosti i ograničenja u odnosu na normalnu spektrofotometriju. Dat je pregled analitičke primene DS u različitim oblastima: neorganskoj i organskoj analizi, analizi farmaceutskih preparata, kliničkoj analizi, analizi hrane, hemije životne sredine, hemijskoj ravnoteži.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Analytical application of derivative spectrophotometry
T1  - Analitička primena derivativne spektrofotometrije
VL  - 65
IS  - 7
SP  - 457
EP  - 472
UR  - https://hdl.handle.net/21.15107/rcub_farfar_260
ER  - 

@article{
author = "Popović, Gordana and Pfendt, Lidija and Stefanović, Violeta M.",
year = "2000",
abstract = "1. Introduction 2. Basic characteristics of derivative spectrophotometry 2.1. Increase of spectra resolution 2.2. Elimination of the influence of baseline shift and matrix interferences 2.3. Enhancement of the detectability of minor spectral features 2.4. Precise determination of the positions of absorption maxima 2.5. Signal-to-noise ratio (SNR) 2.6. Quantitative analysis 3. Analytical applications 3.1. Inorganic analysis 3.2. Organic and pharmaceutical analysis 3.3. Analysis of food and water 3.4. Application of derivative spectrophotometry for the determination of equilibrium constants., Razmatrani su osnovni principi derivativne spektrofotometrije (DS) i njene prednosti i ograničenja u odnosu na normalnu spektrofotometriju. Dat je pregled analitičke primene DS u različitim oblastima: neorganskoj i organskoj analizi, analizi farmaceutskih preparata, kliničkoj analizi, analizi hrane, hemije životne sredine, hemijskoj ravnoteži.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Analytical application of derivative spectrophotometry, Analitička primena derivativne spektrofotometrije",
volume = "65",
number = "7",
pages = "457-472",
url = "https://hdl.handle.net/21.15107/rcub_farfar_260"
}

Popović, G., Pfendt, L.,& Stefanović, V. M.. (2000). Analytical application of derivative spectrophotometry. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 65(7), 457-472.
https://hdl.handle.net/21.15107/rcub_farfar_260

Popović G, Pfendt L, Stefanović VM. Analytical application of derivative spectrophotometry. in Journal of the Serbian Chemical Society. 2000;65(7):457-472.
https://hdl.handle.net/21.15107/rcub_farfar_260 .

Popović, Gordana, Pfendt, Lidija, Stefanović, Violeta M., "Analytical application of derivative spectrophotometry" in Journal of the Serbian Chemical Society, 65, no. 7 (2000):457-472,
https://hdl.handle.net/21.15107/rcub_farfar_260 .

TY  - JOUR
AU  - Pfendt, Lidija
AU  - Popović, Gordana
AU  - Stefanović, Violeta M.
AU  - Rajić, M.B
PY  - 1997
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/171
AB  - A second-order derivative ultraviolet spectroscopic method for the determination of midazolam in the presence of maleic acid is described. The assays were carried out in borate buffer (pH 9.2) at a wavelength of 222 nm, which corresponds to the position of the peak of 2 D spectrum of midazolam and to the intersection point of the 2 D spectrum of maleic acid with the abscissa (zero-crossing point). These conditions were chosen as optimum on the basis of the knowledge of acid-base equilibria of midazolam and maleic acid and of investigations of the absorption and 2 D spectra of midazolam and maleic acid and their mixtures. A calibration graph was obtained in the range of midazolam concentrations of 0.25-2.5x10 -5 mol/dm 3 with a correlation coefficient of 0.99996. The method is simple and rapid, and was successfully applied to the determination of midazolam in the presence of maleic acid in laboratory mixtures and in commercial tablets containing midazolam in the maleate form.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry
VL  - 62
IS  - 8
SP  - 687
EP  - 693
UR  - https://hdl.handle.net/21.15107/rcub_farfar_171
ER  - 

@article{
author = "Pfendt, Lidija and Popović, Gordana and Stefanović, Violeta M. and Rajić, M.B",
year = "1997",
abstract = "A second-order derivative ultraviolet spectroscopic method for the determination of midazolam in the presence of maleic acid is described. The assays were carried out in borate buffer (pH 9.2) at a wavelength of 222 nm, which corresponds to the position of the peak of 2 D spectrum of midazolam and to the intersection point of the 2 D spectrum of maleic acid with the abscissa (zero-crossing point). These conditions were chosen as optimum on the basis of the knowledge of acid-base equilibria of midazolam and maleic acid and of investigations of the absorption and 2 D spectra of midazolam and maleic acid and their mixtures. A calibration graph was obtained in the range of midazolam concentrations of 0.25-2.5x10 -5 mol/dm 3 with a correlation coefficient of 0.99996. The method is simple and rapid, and was successfully applied to the determination of midazolam in the presence of maleic acid in laboratory mixtures and in commercial tablets containing midazolam in the maleate form.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry",
volume = "62",
number = "8",
pages = "687-693",
url = "https://hdl.handle.net/21.15107/rcub_farfar_171"
}

Pfendt, L., Popović, G., Stefanović, V. M.,& Rajić, M.B. (1997). Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 62(8), 687-693.
https://hdl.handle.net/21.15107/rcub_farfar_171

Pfendt L, Popović G, Stefanović VM, Rajić M. Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry. in Journal of the Serbian Chemical Society. 1997;62(8):687-693.
https://hdl.handle.net/21.15107/rcub_farfar_171 .

Pfendt, Lidija, Popović, Gordana, Stefanović, Violeta M., Rajić, M.B, "Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry" in Journal of the Serbian Chemical Society, 62, no. 8 (1997):687-693,
https://hdl.handle.net/21.15107/rcub_farfar_171 .