Jelikić-Stankov, Milena

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  • Jelikić-Stankov, Milena (14)

Author's Bibliography

Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices

Pavun, Leposava; Uskoković-Marković, Snežana; Jelikić-Stankov, Milena; Đikanović, Daniela; Đurđević, Predrag

(Czech Academy Agricultural Sciences, Prague, 2018)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Uskoković-Marković, Snežana
AU  - Jelikić-Stankov, Milena
AU  - Đikanović, Daniela
AU  - Đurđević, Predrag
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3241
AB  - We propose a sensitive and selective spectrofluorimetric method for the determination of flavonoids as expressed in 'quercetin equivalent' in apple juices. The method is based on the strong emission of the aluminium(III)-quercetin complex at 480 nm with excitation at 420 nm, and it is successfully applied for the determination of flavonoids in commercial apple juices and compared with results obtained in reference spectrophotometric determination. The flavonoid content in commercial apple juices was found to range from 5.53 to 15.55 mg/l quercetin equivalent. The very good agreement between the two methods indicates the suitability of the proposed spectrofluorimetric method for the precise and accurate determination of flavonoids. In addition, the total polyphenol content was determined spectrophotometrically using the Folin-Ciocalteu (FC) method and the antioxidative activity of the tested juices was tested in a DPPH assay and these values were correlated with each other. The obtained profiles of compounds with antioxidative ability lead us to conclude that fruit juice labels based only on fruit % might sometimes misinform consumers.
PB  - Czech Academy Agricultural Sciences, Prague
T2  - Czech Journal of Food Sciences
T1  - Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices
VL  - 36
IS  - 3
SP  - 233
EP  - 238
DO  - 10.17221/211/2017-CJFS
ER  - 
@article{
author = "Pavun, Leposava and Uskoković-Marković, Snežana and Jelikić-Stankov, Milena and Đikanović, Daniela and Đurđević, Predrag",
year = "2018",
abstract = "We propose a sensitive and selective spectrofluorimetric method for the determination of flavonoids as expressed in 'quercetin equivalent' in apple juices. The method is based on the strong emission of the aluminium(III)-quercetin complex at 480 nm with excitation at 420 nm, and it is successfully applied for the determination of flavonoids in commercial apple juices and compared with results obtained in reference spectrophotometric determination. The flavonoid content in commercial apple juices was found to range from 5.53 to 15.55 mg/l quercetin equivalent. The very good agreement between the two methods indicates the suitability of the proposed spectrofluorimetric method for the precise and accurate determination of flavonoids. In addition, the total polyphenol content was determined spectrophotometrically using the Folin-Ciocalteu (FC) method and the antioxidative activity of the tested juices was tested in a DPPH assay and these values were correlated with each other. The obtained profiles of compounds with antioxidative ability lead us to conclude that fruit juice labels based only on fruit % might sometimes misinform consumers.",
publisher = "Czech Academy Agricultural Sciences, Prague",
journal = "Czech Journal of Food Sciences",
title = "Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices",
volume = "36",
number = "3",
pages = "233-238",
doi = "10.17221/211/2017-CJFS"
}
Pavun, L., Uskoković-Marković, S., Jelikić-Stankov, M., Đikanović, D.,& Đurđević, P.. (2018). Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices. in Czech Journal of Food Sciences
Czech Academy Agricultural Sciences, Prague., 36(3), 233-238.
https://doi.org/10.17221/211/2017-CJFS
Pavun L, Uskoković-Marković S, Jelikić-Stankov M, Đikanović D, Đurđević P. Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices. in Czech Journal of Food Sciences. 2018;36(3):233-238.
doi:10.17221/211/2017-CJFS .
Pavun, Leposava, Uskoković-Marković, Snežana, Jelikić-Stankov, Milena, Đikanović, Daniela, Đurđević, Predrag, "Determination of Flavonoids and Total Polyphenol Contents in Commercial Apple Juices" in Czech Journal of Food Sciences, 36, no. 3 (2018):233-238,
https://doi.org/10.17221/211/2017-CJFS . .
27
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25

Zinc complex-based determination of rutin in dietary supplements

Pavun, Leposava; Jelikić-Stankov, Milena; Đurđević, Predrag; Ćirić, Andrija; Uskoković-Marković, Snežana

(Soc Chemists Technologists Madeconia, Skopje, 2016)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Jelikić-Stankov, Milena
AU  - Đurđević, Predrag
AU  - Ćirić, Andrija
AU  - Uskoković-Marković, Snežana
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2751
AB  - The aim of this study was to develop and validate a simple, rapid, sensitive and low-cost method for determination of rutin in tablets. The proposed spectrophotometric method is based on the formation of the Zn2+-rutin complex in methanol 70% (v/v) at pH 8.52, and detection at lambda(max)= 410 nm. The concentration range over which the response was linear was 0.3-12.2 mu g ml(-1). The limit of detection (LOD) and the limit of quantification (LOQ) were 0.21 mu g ml(-1) and 0.63 mu g ml(-1), respectively. The proposed method was successfully applied to the determination of rutin in herbal dietary supplements. The reliability of the method was checked by comparison with results obtained by the established RP-HPLC/UV method. The proposed method fulfills all aimed requirements.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Zinc complex-based determination of rutin in dietary supplements
VL  - 35
IS  - 1
SP  - 13
EP  - 18
DO  - 10.20450/mjcce.2016.897
ER  - 
@article{
author = "Pavun, Leposava and Jelikić-Stankov, Milena and Đurđević, Predrag and Ćirić, Andrija and Uskoković-Marković, Snežana",
year = "2016",
abstract = "The aim of this study was to develop and validate a simple, rapid, sensitive and low-cost method for determination of rutin in tablets. The proposed spectrophotometric method is based on the formation of the Zn2+-rutin complex in methanol 70% (v/v) at pH 8.52, and detection at lambda(max)= 410 nm. The concentration range over which the response was linear was 0.3-12.2 mu g ml(-1). The limit of detection (LOD) and the limit of quantification (LOQ) were 0.21 mu g ml(-1) and 0.63 mu g ml(-1), respectively. The proposed method was successfully applied to the determination of rutin in herbal dietary supplements. The reliability of the method was checked by comparison with results obtained by the established RP-HPLC/UV method. The proposed method fulfills all aimed requirements.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Zinc complex-based determination of rutin in dietary supplements",
volume = "35",
number = "1",
pages = "13-18",
doi = "10.20450/mjcce.2016.897"
}
Pavun, L., Jelikić-Stankov, M., Đurđević, P., Ćirić, A.,& Uskoković-Marković, S.. (2016). Zinc complex-based determination of rutin in dietary supplements. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 35(1), 13-18.
https://doi.org/10.20450/mjcce.2016.897
Pavun L, Jelikić-Stankov M, Đurđević P, Ćirić A, Uskoković-Marković S. Zinc complex-based determination of rutin in dietary supplements. in Macedonian Journal of Chemistry and Chemical Engineering. 2016;35(1):13-18.
doi:10.20450/mjcce.2016.897 .
Pavun, Leposava, Jelikić-Stankov, Milena, Đurđević, Predrag, Ćirić, Andrija, Uskoković-Marković, Snežana, "Zinc complex-based determination of rutin in dietary supplements" in Macedonian Journal of Chemistry and Chemical Engineering, 35, no. 1 (2016):13-18,
https://doi.org/10.20450/mjcce.2016.897 . .
3
1
3

Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms

Pavun, Leposava; Đurđević, Predrag; Jelikić-Stankov, Milena; Đikanović, Daniela; Ćirić, Andrija; Uskoković-Marković, Snežana

(Soc Chemists Technologists Madeconia, Skopje, 2014)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Đikanović, Daniela
AU  - Ćirić, Andrija
AU  - Uskoković-Marković, Snežana
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2116
AB  - A simple, accurate and precise method based on the fluorescence properties of the aluminum(III)-quercetin complex, for the determination of quercetin, has been developed and validated. The complex has strong emission at pH 3.30, lambda(em) = 480 nm, with lambda(ex) = 420 nm. The linearity range of quercetin determination was 1.5-60.5 ng ml(-1) with LOD 0.09 ng ml(-1) and LOQ 0.27 ng ml(-1). Recovery values in the range of 99.9-100.2% indicate a good accuracy of the method. The established method was applied for the determination of quercetin in capsules, with a recovery value of 98.3%, standard deviation of 0.22% and coefficient of variation of 0.09%. The reliability of the method was checked by the newly developed RP-HPLC/UV method for capsules with the direct determination of quercetin after separation. The good agreement between the two methods indicates the applicability of the proposed spectrofluorimetric method for quercetin determination in pharmaceutical dosage forms, with high reproducibility, and enables the direct and simple determination without its prior extraction from samples. The proposed spectrofluorimetric method has much better sensitivity and LOD and LOQ values that are about 1000 times lower than data reported in the literature.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms
VL  - 33
IS  - 2
SP  - 209
EP  - 215
DO  - 10.20450/mjcce.2014.496
ER  - 
@article{
author = "Pavun, Leposava and Đurđević, Predrag and Jelikić-Stankov, Milena and Đikanović, Daniela and Ćirić, Andrija and Uskoković-Marković, Snežana",
year = "2014",
abstract = "A simple, accurate and precise method based on the fluorescence properties of the aluminum(III)-quercetin complex, for the determination of quercetin, has been developed and validated. The complex has strong emission at pH 3.30, lambda(em) = 480 nm, with lambda(ex) = 420 nm. The linearity range of quercetin determination was 1.5-60.5 ng ml(-1) with LOD 0.09 ng ml(-1) and LOQ 0.27 ng ml(-1). Recovery values in the range of 99.9-100.2% indicate a good accuracy of the method. The established method was applied for the determination of quercetin in capsules, with a recovery value of 98.3%, standard deviation of 0.22% and coefficient of variation of 0.09%. The reliability of the method was checked by the newly developed RP-HPLC/UV method for capsules with the direct determination of quercetin after separation. The good agreement between the two methods indicates the applicability of the proposed spectrofluorimetric method for quercetin determination in pharmaceutical dosage forms, with high reproducibility, and enables the direct and simple determination without its prior extraction from samples. The proposed spectrofluorimetric method has much better sensitivity and LOD and LOQ values that are about 1000 times lower than data reported in the literature.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms",
volume = "33",
number = "2",
pages = "209-215",
doi = "10.20450/mjcce.2014.496"
}
Pavun, L., Đurđević, P., Jelikić-Stankov, M., Đikanović, D., Ćirić, A.,& Uskoković-Marković, S.. (2014). Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 33(2), 209-215.
https://doi.org/10.20450/mjcce.2014.496
Pavun L, Đurđević P, Jelikić-Stankov M, Đikanović D, Ćirić A, Uskoković-Marković S. Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms. in Macedonian Journal of Chemistry and Chemical Engineering. 2014;33(2):209-215.
doi:10.20450/mjcce.2014.496 .
Pavun, Leposava, Đurđević, Predrag, Jelikić-Stankov, Milena, Đikanović, Daniela, Ćirić, Andrija, Uskoković-Marković, Snežana, "Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms" in Macedonian Journal of Chemistry and Chemical Engineering, 33, no. 2 (2014):209-215,
https://doi.org/10.20450/mjcce.2014.496 . .
11
6
11

The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma

Đurđević, Predrag; Jakovljević, Ivan; Joksović, Ljubinka; Ivanović, Nevena; Jelikić-Stankov, Milena

(MDPI, Basel, 2014)

TY  - JOUR
AU  - Đurđević, Predrag
AU  - Jakovljević, Ivan
AU  - Joksović, Ljubinka
AU  - Ivanović, Nevena
AU  - Jelikić-Stankov, Milena
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2104
AB  - The speciation of Cu2+, Ni2+ and Zn2+ ions in the presence of the fluoroquinolones (FQs) moxifloxacin, ofloxacin, levofloxacin and ciprofloxacin, in human blood plasma was studied under physiological conditions by computer simulation. The speciation was calculated using an updated model of human blood plasma including over 6,000 species with the aid of the program Hyss2009. The identity and stability of metal-FQ complexes were determined by potentiometric (310 K, 0.15 mol/L NaCl), spectrophotometric, spectrofluorimetric, ESI-MS and H-1-NMR measurements. In the case of Cu2+ ion the concentration of main low molecular weight (LMW) plasma complex (Cu(Cis) His) is very slightly influenced by all examined FQs. FQs show much higher influence on main plasma Ni2+ and Zn2+ complexes: (Ni(His)(2) and Zn(Cys) Cit, respectively. Levofloxacin exhibits the highest influence on the fraction of the main nickel complex, Ni(His)(2), even at a concentration level of 3 x 10(-5) mol/L. The same effect is seen on the main zinc complex, Zn(Cys) Cit. Calculated plasma mobilizing indexes indicate that ciprofloxacin possesses the highest mobilizing power from plasma proteins, toward copper ion, while levofloxacin is the most influential on nickel and zinc ions. The results obtained indicate that the drugs studied are safe in relation to mobilization of essential metal ions under physiological conditions. The observed effects were explained in terms of competitive equilibrium reactions between the FQs and the main LMW complexes of the metal ions.
PB  - MDPI, Basel
T2  - Molecules
T1  - The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma
VL  - 19
IS  - 8
SP  - 12194
EP  - 12223
DO  - 10.3390/molecules190812194
ER  - 
@article{
author = "Đurđević, Predrag and Jakovljević, Ivan and Joksović, Ljubinka and Ivanović, Nevena and Jelikić-Stankov, Milena",
year = "2014",
abstract = "The speciation of Cu2+, Ni2+ and Zn2+ ions in the presence of the fluoroquinolones (FQs) moxifloxacin, ofloxacin, levofloxacin and ciprofloxacin, in human blood plasma was studied under physiological conditions by computer simulation. The speciation was calculated using an updated model of human blood plasma including over 6,000 species with the aid of the program Hyss2009. The identity and stability of metal-FQ complexes were determined by potentiometric (310 K, 0.15 mol/L NaCl), spectrophotometric, spectrofluorimetric, ESI-MS and H-1-NMR measurements. In the case of Cu2+ ion the concentration of main low molecular weight (LMW) plasma complex (Cu(Cis) His) is very slightly influenced by all examined FQs. FQs show much higher influence on main plasma Ni2+ and Zn2+ complexes: (Ni(His)(2) and Zn(Cys) Cit, respectively. Levofloxacin exhibits the highest influence on the fraction of the main nickel complex, Ni(His)(2), even at a concentration level of 3 x 10(-5) mol/L. The same effect is seen on the main zinc complex, Zn(Cys) Cit. Calculated plasma mobilizing indexes indicate that ciprofloxacin possesses the highest mobilizing power from plasma proteins, toward copper ion, while levofloxacin is the most influential on nickel and zinc ions. The results obtained indicate that the drugs studied are safe in relation to mobilization of essential metal ions under physiological conditions. The observed effects were explained in terms of competitive equilibrium reactions between the FQs and the main LMW complexes of the metal ions.",
publisher = "MDPI, Basel",
journal = "Molecules",
title = "The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma",
volume = "19",
number = "8",
pages = "12194-12223",
doi = "10.3390/molecules190812194"
}
Đurđević, P., Jakovljević, I., Joksović, L., Ivanović, N.,& Jelikić-Stankov, M.. (2014). The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma. in Molecules
MDPI, Basel., 19(8), 12194-12223.
https://doi.org/10.3390/molecules190812194
Đurđević P, Jakovljević I, Joksović L, Ivanović N, Jelikić-Stankov M. The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma. in Molecules. 2014;19(8):12194-12223.
doi:10.3390/molecules190812194 .
Đurđević, Predrag, Jakovljević, Ivan, Joksović, Ljubinka, Ivanović, Nevena, Jelikić-Stankov, Milena, "The Effect of Some Fluoroquinolone Family Members on Biospeciation of Copper(II), Nickel(II) and Zinc(II) Ions in Human Plasma" in Molecules, 19, no. 8 (2014):12194-12223,
https://doi.org/10.3390/molecules190812194 . .
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16

Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen

Lazarević, J. J.; Uskoković-Marković, Snežana; Jelikić-Stankov, Milena; Radonjić, M.; Tanasković, D.; Lazarević, N.; Popović, Z. V.

(Pergamon-Elsevier Science Ltd, Oxford, 2014)

TY  - JOUR
AU  - Lazarević, J. J.
AU  - Uskoković-Marković, Snežana
AU  - Jelikić-Stankov, Milena
AU  - Radonjić, M.
AU  - Tanasković, D.
AU  - Lazarević, N.
AU  - Popović, Z. V.
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2233
AB  - We report the low-temperature Raman scattering study of racemic ibuprofen. Detailed analysis of the racemic ibuprofen crystal symmetry, related to the vibrational properties of the system, has been presented. The first principle calculations of a single ibuprofen molecule dynamical properties are compered with experimental data. Nineteen, out of 26 modes expected for the spectral region below 200 cm(-1), have been observed.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectroscopy Letters
T1  - Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen
VL  - 126
SP  - 301
EP  - 305
DO  - 10.1016/j.saa.2014.01.135
ER  - 
@article{
author = "Lazarević, J. J. and Uskoković-Marković, Snežana and Jelikić-Stankov, Milena and Radonjić, M. and Tanasković, D. and Lazarević, N. and Popović, Z. V.",
year = "2014",
abstract = "We report the low-temperature Raman scattering study of racemic ibuprofen. Detailed analysis of the racemic ibuprofen crystal symmetry, related to the vibrational properties of the system, has been presented. The first principle calculations of a single ibuprofen molecule dynamical properties are compered with experimental data. Nineteen, out of 26 modes expected for the spectral region below 200 cm(-1), have been observed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectroscopy Letters",
title = "Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen",
volume = "126",
pages = "301-305",
doi = "10.1016/j.saa.2014.01.135"
}
Lazarević, J. J., Uskoković-Marković, S., Jelikić-Stankov, M., Radonjić, M., Tanasković, D., Lazarević, N.,& Popović, Z. V.. (2014). Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen. in Spectroscopy Letters
Pergamon-Elsevier Science Ltd, Oxford., 126, 301-305.
https://doi.org/10.1016/j.saa.2014.01.135
Lazarević JJ, Uskoković-Marković S, Jelikić-Stankov M, Radonjić M, Tanasković D, Lazarević N, Popović ZV. Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen. in Spectroscopy Letters. 2014;126:301-305.
doi:10.1016/j.saa.2014.01.135 .
Lazarević, J. J., Uskoković-Marković, Snežana, Jelikić-Stankov, Milena, Radonjić, M., Tanasković, D., Lazarević, N., Popović, Z. V., "Intermolecular and low-frequency intramolecular Raman scattering study of racemic ibuprofen" in Spectroscopy Letters, 126 (2014):301-305,
https://doi.org/10.1016/j.saa.2014.01.135 . .
18
12
18

Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity

Ćirić, Andrija; Ivanović, Nevena; Cvijović, Milica S.; Jelikić-Stankov, Milena; Joksović, Ljubinka; Đurđević, Predrag

(Springer, New York, 2014)

TY  - JOUR
AU  - Ćirić, Andrija
AU  - Ivanović, Nevena
AU  - Cvijović, Milica S.
AU  - Jelikić-Stankov, Milena
AU  - Joksović, Ljubinka
AU  - Đurđević, Predrag
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2216
AB  - In the present work, the rapid RP-HPLC method with UV (DAD) detection for simultaneous quantification of bioflavonoids: quercetin, apigenin, catechin, epicatechin, kaempferol, and luteolin in Brassica oleracea species samples (cauliflower, broccoli, and Brussels sprouts) was developed with the aid of LC-Simulator (ACD LabsA (R) suite) software. A series of extracts obtained with different extraction method were evaluated for antioxidant activity. The optimal conditions for separation and quantification were established after nine scouting runs entered to LC-Simulator software. The optimized separation was achieved on Hypersil GOLD aQ column with isocratic elution and mobile phase composition A:2 % acetic acid in water and B:acetonitrile in 91:9 (v/v %) ratio. The R (s) values were in the range from 2.6 to 8.00, indicating good selectivity of the method. The obtained results generally show good agreement with published data. Low detection limits (0.02-0.055 mu g/mL) were obtained with acceptable recoveries (90-109 %). Total time of analysis was less than 11 min; therefore, the proposed method represents significant improvement over existing methods. Extracts from Brassica vegetables, obtained using different extraction procedures, were studied for their radical scavenging effects. Scavenging of DPPH showed different kinetics at the beginning of the assay period and after 15 min from the initialization of reaction. Different kinetics suggested the presence of polymerized and/or less active antioxidants with different scavenging mechanisms for particular polyphenolic compounds.
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity
VL  - 7
IS  - 7
SP  - 1387
EP  - 1399
DO  - 10.1007/s12161-013-9761-y
ER  - 
@article{
author = "Ćirić, Andrija and Ivanović, Nevena and Cvijović, Milica S. and Jelikić-Stankov, Milena and Joksović, Ljubinka and Đurđević, Predrag",
year = "2014",
abstract = "In the present work, the rapid RP-HPLC method with UV (DAD) detection for simultaneous quantification of bioflavonoids: quercetin, apigenin, catechin, epicatechin, kaempferol, and luteolin in Brassica oleracea species samples (cauliflower, broccoli, and Brussels sprouts) was developed with the aid of LC-Simulator (ACD LabsA (R) suite) software. A series of extracts obtained with different extraction method were evaluated for antioxidant activity. The optimal conditions for separation and quantification were established after nine scouting runs entered to LC-Simulator software. The optimized separation was achieved on Hypersil GOLD aQ column with isocratic elution and mobile phase composition A:2 % acetic acid in water and B:acetonitrile in 91:9 (v/v %) ratio. The R (s) values were in the range from 2.6 to 8.00, indicating good selectivity of the method. The obtained results generally show good agreement with published data. Low detection limits (0.02-0.055 mu g/mL) were obtained with acceptable recoveries (90-109 %). Total time of analysis was less than 11 min; therefore, the proposed method represents significant improvement over existing methods. Extracts from Brassica vegetables, obtained using different extraction procedures, were studied for their radical scavenging effects. Scavenging of DPPH showed different kinetics at the beginning of the assay period and after 15 min from the initialization of reaction. Different kinetics suggested the presence of polymerized and/or less active antioxidants with different scavenging mechanisms for particular polyphenolic compounds.",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity",
volume = "7",
number = "7",
pages = "1387-1399",
doi = "10.1007/s12161-013-9761-y"
}
Ćirić, A., Ivanović, N., Cvijović, M. S., Jelikić-Stankov, M., Joksović, L.,& Đurđević, P.. (2014). Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity. in Food Analytical Methods
Springer, New York., 7(7), 1387-1399.
https://doi.org/10.1007/s12161-013-9761-y
Ćirić A, Ivanović N, Cvijović MS, Jelikić-Stankov M, Joksović L, Đurđević P. Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity. in Food Analytical Methods. 2014;7(7):1387-1399.
doi:10.1007/s12161-013-9761-y .
Ćirić, Andrija, Ivanović, Nevena, Cvijović, Milica S., Jelikić-Stankov, Milena, Joksović, Ljubinka, Đurđević, Predrag, "Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity" in Food Analytical Methods, 7, no. 7 (2014):1387-1399,
https://doi.org/10.1007/s12161-013-9761-y . .
1
1

Raman spectroscopy as a new biochemical diagnostic tool

Uskoković-Marković, Snežana; Jelikić-Stankov, Milena; Holclajtner-Antunović, Ivanka; Đurđević, Predrag

(Društvo medicinskih biohemičara Srbije, Beograd i Versita, 2013)

TY  - JOUR
AU  - Uskoković-Marković, Snežana
AU  - Jelikić-Stankov, Milena
AU  - Holclajtner-Antunović, Ivanka
AU  - Đurđević, Predrag
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1908
AB  - In this review, Raman spectroscopy is described as a new and potentially powerful diagnostic tool in comparison to routine biochemical tests. Advanced instrumentation and new Raman spectroscopy techniques enable rapid and simultaneous identification and/or determination of several biochemical parameters, such as glucose, acetone, creatinine, urea, lipid profile, uric acid, total protein, etc., with a very low limit of detection. Raman spectroscopy could also be applied in molecule and cell characterization, as well as diagnostics of atherosclerosis in its early stage. Raman spectroscopy is nondestructive and could be applied to all kinds of samples, which simplifies the diagnostics of numerous diseases and pathologic states. Special attention is paid to literature data illustrating the application of Raman spectroscopy for transdermal glucose monitoring and cancer diagnostics.
AB  - U ovom prikazu opisana je primena Ramanske spektroskopije kao nove metode velikih mogućnosti u dijagnostici, u poređenju sa rutinskim biohemijskim testovima. Metoda je razvijena i usavršena za identifikaciju i/ili određivanje velikog broja biohemijskih parametara, kao što su glukoza, aceton, kreatinin, urea, lipidni profil, mokraćna kiselina, ukupni proteini i drugi, uz veoma nizak limit detekcije. Ramanska spektroskopija takođe se može primenjivati u molekulskoj i ćelijskoj karakterizaciji, kao i za dijagnostiku ranog stadijuma ateroskleroze. Ramanska spektroskopija je nedestruktivna i može se primenjivati na sve vrste uzoraka, što pojednostavljuje dijagnostiku brojnih bolesti i patoloških stanja. Posebna pažnja u radu je posvećena podacima iz literature koji ilustruju primenu Ramanske spektroskopije u transdermalnom monitoringu glukoze i dijagnostici kancera.
PB  - Društvo medicinskih biohemičara Srbije, Beograd i Versita
T2  - Journal of Medical Biochemistry
T1  - Raman spectroscopy as a new biochemical diagnostic tool
T1  - Ramanska spektroskopija kao novo biohemijsko dijagnostičko sredstvo
VL  - 32
IS  - 2
SP  - 96
EP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1908
ER  - 
@article{
author = "Uskoković-Marković, Snežana and Jelikić-Stankov, Milena and Holclajtner-Antunović, Ivanka and Đurđević, Predrag",
year = "2013",
abstract = "In this review, Raman spectroscopy is described as a new and potentially powerful diagnostic tool in comparison to routine biochemical tests. Advanced instrumentation and new Raman spectroscopy techniques enable rapid and simultaneous identification and/or determination of several biochemical parameters, such as glucose, acetone, creatinine, urea, lipid profile, uric acid, total protein, etc., with a very low limit of detection. Raman spectroscopy could also be applied in molecule and cell characterization, as well as diagnostics of atherosclerosis in its early stage. Raman spectroscopy is nondestructive and could be applied to all kinds of samples, which simplifies the diagnostics of numerous diseases and pathologic states. Special attention is paid to literature data illustrating the application of Raman spectroscopy for transdermal glucose monitoring and cancer diagnostics., U ovom prikazu opisana je primena Ramanske spektroskopije kao nove metode velikih mogućnosti u dijagnostici, u poređenju sa rutinskim biohemijskim testovima. Metoda je razvijena i usavršena za identifikaciju i/ili određivanje velikog broja biohemijskih parametara, kao što su glukoza, aceton, kreatinin, urea, lipidni profil, mokraćna kiselina, ukupni proteini i drugi, uz veoma nizak limit detekcije. Ramanska spektroskopija takođe se može primenjivati u molekulskoj i ćelijskoj karakterizaciji, kao i za dijagnostiku ranog stadijuma ateroskleroze. Ramanska spektroskopija je nedestruktivna i može se primenjivati na sve vrste uzoraka, što pojednostavljuje dijagnostiku brojnih bolesti i patoloških stanja. Posebna pažnja u radu je posvećena podacima iz literature koji ilustruju primenu Ramanske spektroskopije u transdermalnom monitoringu glukoze i dijagnostici kancera.",
publisher = "Društvo medicinskih biohemičara Srbije, Beograd i Versita",
journal = "Journal of Medical Biochemistry",
title = "Raman spectroscopy as a new biochemical diagnostic tool, Ramanska spektroskopija kao novo biohemijsko dijagnostičko sredstvo",
volume = "32",
number = "2",
pages = "96-103",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1908"
}
Uskoković-Marković, S., Jelikić-Stankov, M., Holclajtner-Antunović, I.,& Đurđević, P.. (2013). Raman spectroscopy as a new biochemical diagnostic tool. in Journal of Medical Biochemistry
Društvo medicinskih biohemičara Srbije, Beograd i Versita., 32(2), 96-103.
https://hdl.handle.net/21.15107/rcub_farfar_1908
Uskoković-Marković S, Jelikić-Stankov M, Holclajtner-Antunović I, Đurđević P. Raman spectroscopy as a new biochemical diagnostic tool. in Journal of Medical Biochemistry. 2013;32(2):96-103.
https://hdl.handle.net/21.15107/rcub_farfar_1908 .
Uskoković-Marković, Snežana, Jelikić-Stankov, Milena, Holclajtner-Antunović, Ivanka, Đurđević, Predrag, "Raman spectroscopy as a new biochemical diagnostic tool" in Journal of Medical Biochemistry, 32, no. 2 (2013):96-103,
https://hdl.handle.net/21.15107/rcub_farfar_1908 .
12
12

Fluorometric determination of hesperidin in orange juices available on Serbian market

Pavun, Leposava; Jelikić-Stankov, Milena; Malešev, Dušan; Uskoković-Marković, Snežana; Dimitrić-Marković, Jasmina; Đurđević, Predrag; Đikanović, Daniela

(Univerzitet u Kragujevcu - Agronomski fakultet, Čačak, 2012)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Jelikić-Stankov, Milena
AU  - Malešev, Dušan
AU  - Uskoković-Marković, Snežana
AU  - Dimitrić-Marković, Jasmina
AU  - Đurđević, Predrag
AU  - Đikanović, Daniela
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1824
AB  - The spectrofluorometric method based on fluorescence ability of aluminium - hesperidin complex for the determination of hesperidin in orange juice is proposed. The linearity range of hesperidin in methanolicaqueous solution was 0.08 - 18.0 μg/mL with LOD and LOQ values as 0.023 μg/mL and 0.070 μg/mL, respectively, and recovery values in the range 97.8 - 99.7 %. Method was simplified by omitting any of surphactant agents usually applied in similar procedures, and successfully applied for the determination of hesperidin in orange juices commercially available on the Serbian market.
AB  - U radu je predložena spektrofluorimetrijska metoda za određivanje sadržaja hesperidina u sokovima od pomorandže zasnovana na sposobnosti fluorescencije kompleksa aluminijum - hesperidin. Utvrđena je oblast linearnosti za određivanje hesperidina u metanolno-vodenim rastvora od 0.08 do 18.0 μg/mL, pri čemu je LOD= 0.023 μg/mL i LOQ= 0.070 μg/mL, a recovery vrednost 97.8 - 99.7 %. Metoda je pojednostavljena izostavljanjem često korišćenih površinski aktivnih materija koje se koriste u sličnim procedurama i uspešno je primenjena za određivanje sadržaja hesperidina u sokovima od pomorandže prisutnim na tržištu Srbije.
PB  - Univerzitet u Kragujevcu - Agronomski fakultet, Čačak
T2  - Acta agriculturae Serbica
T1  - Fluorometric determination of hesperidin in orange juices available on Serbian market
T1  - Fluorometrijsko određivanje hesperidina u sokovima od pomorandže prisutnim na tržištu Srbije
VL  - 17
IS  - 34
SP  - 93
EP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1824
ER  - 
@article{
author = "Pavun, Leposava and Jelikić-Stankov, Milena and Malešev, Dušan and Uskoković-Marković, Snežana and Dimitrić-Marković, Jasmina and Đurđević, Predrag and Đikanović, Daniela",
year = "2012",
abstract = "The spectrofluorometric method based on fluorescence ability of aluminium - hesperidin complex for the determination of hesperidin in orange juice is proposed. The linearity range of hesperidin in methanolicaqueous solution was 0.08 - 18.0 μg/mL with LOD and LOQ values as 0.023 μg/mL and 0.070 μg/mL, respectively, and recovery values in the range 97.8 - 99.7 %. Method was simplified by omitting any of surphactant agents usually applied in similar procedures, and successfully applied for the determination of hesperidin in orange juices commercially available on the Serbian market., U radu je predložena spektrofluorimetrijska metoda za određivanje sadržaja hesperidina u sokovima od pomorandže zasnovana na sposobnosti fluorescencije kompleksa aluminijum - hesperidin. Utvrđena je oblast linearnosti za određivanje hesperidina u metanolno-vodenim rastvora od 0.08 do 18.0 μg/mL, pri čemu je LOD= 0.023 μg/mL i LOQ= 0.070 μg/mL, a recovery vrednost 97.8 - 99.7 %. Metoda je pojednostavljena izostavljanjem često korišćenih površinski aktivnih materija koje se koriste u sličnim procedurama i uspešno je primenjena za određivanje sadržaja hesperidina u sokovima od pomorandže prisutnim na tržištu Srbije.",
publisher = "Univerzitet u Kragujevcu - Agronomski fakultet, Čačak",
journal = "Acta agriculturae Serbica",
title = "Fluorometric determination of hesperidin in orange juices available on Serbian market, Fluorometrijsko određivanje hesperidina u sokovima od pomorandže prisutnim na tržištu Srbije",
volume = "17",
number = "34",
pages = "93-103",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1824"
}
Pavun, L., Jelikić-Stankov, M., Malešev, D., Uskoković-Marković, S., Dimitrić-Marković, J., Đurđević, P.,& Đikanović, D.. (2012). Fluorometric determination of hesperidin in orange juices available on Serbian market. in Acta agriculturae Serbica
Univerzitet u Kragujevcu - Agronomski fakultet, Čačak., 17(34), 93-103.
https://hdl.handle.net/21.15107/rcub_farfar_1824
Pavun L, Jelikić-Stankov M, Malešev D, Uskoković-Marković S, Dimitrić-Marković J, Đurđević P, Đikanović D. Fluorometric determination of hesperidin in orange juices available on Serbian market. in Acta agriculturae Serbica. 2012;17(34):93-103.
https://hdl.handle.net/21.15107/rcub_farfar_1824 .
Pavun, Leposava, Jelikić-Stankov, Milena, Malešev, Dušan, Uskoković-Marković, Snežana, Dimitrić-Marković, Jasmina, Đurđević, Predrag, Đikanović, Daniela, "Fluorometric determination of hesperidin in orange juices available on Serbian market" in Acta agriculturae Serbica, 17, no. 34 (2012):93-103,
https://hdl.handle.net/21.15107/rcub_farfar_1824 .

Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms

Pavun, Leposava; Dimitrić-Marković, Jasmina; Đurđević, Predrag; Jelikić-Stankov, Milena; Đikanović, Daniela; Ćirić, Andrija; Malešev, Dušan

(Srpsko hemijsko društvo, Beograd, 2012)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Dimitrić-Marković, Jasmina
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Đikanović, Daniela
AU  - Ćirić, Andrija
AU  - Malešev, Dušan
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1821
AB  - A fluorometric method, based on the fluorescence properties of the aluminium(III)-hesperidin complex, for the determination of hesperidin in human plasma and pharmaceutical forms has been developed and validated. The complex shows a strong emission in the presence of the surfactant betain sulphonate SB 12 at 476 nm with excitation at 390 nm. The linearity range for pharmaceutical forms of hesperidin was 0.06-24.4 μg mL-1 with a limit of detection, LOD, of 0.016 μg mL-1 and a limit of quantification, LOQ, of 0.049 μg mL-1. Recovery values in the range 99.3-99.7 % indicate good accuracy of the method. A linear dependence of the intensity of fluorescence of the complex on the concentration of hesperidin in plasma was obtained in concentration range from 0.1-12.2 μg mL-1. The LOD was 0.032 μg mL-1 while LOQ was 0.096 μg mL-1. Recovery values were in the range 98.4-99.8 %. The reliability of the method was checked by an LC-MS/MS method for plasma samples and an HPLC/UV method for tablets with direct determination of hesperidin after separation. Linearity range in determination of hesperidin in pharmaceutical forms was obtained in the range from 0.05 to 10.00 μg mL-1. The LOD was 0.01 μg mL-1 and the LOQ was 0.03 μg mL-1. The linearity range for the determination of hesperidin in plasma was 0.02-10.00 μg mL-1 with an LOD 0.005 μg mL-1 and an LOQ of 0.015 μg mL-1. The good agreement between the two methods indicates the usability of the proposed fluorometric method for the simple, precise and accurate determination of hesperidin in clinical and quality control laboratories.
AB  - Razvijena je fluorimetrijska metoda za određivanje hesperidina u humanom serumu i farmaceutskim preparatima koja se zasniva na fluorescenciji kompleksa aluminijum(III)-hesperidin. Kompleks pokazuje intenzivnu fluorescenciju u prisustvu surfaktanta SB 12 na 476 nm prilikom ekscitacije na 390 nm. Linearna zavisnost intenziteta fluorescencije od koncentracije pri određivanju hesperidina u farmaceutskim preparatima dobijena je u koncentracionom opsegu 0,06-24,4 μg mL-1 sa granicom detekcije od 0,016 μg mL-1 i granicom kvantifikacije od 0,049 μg mL-1. Dobijene 'recovery' vrednosti u intervalu 99,3-99,7 % pokazuju veliku preciznost metode. Linearna zavisnost intenziteta fluorescencije kompeksa od koncentacije hesperidina dobijena je u koncentracionom opsegu 0,1-12,2 μg mL-1 sa granicom detekcije od 0,032 μg mL-1 i granicom kvantifikacije od 0,096 μg mL-1. 'Recovery' vrednosti su dobijene u opsegu 98,4 do 99,8 %. Pouzdanost metode proverena je LC-MS/MS metodom za određivanje hesperidina u serumu, a HPLC/UV metodom proverena je pouzdanost prilikom određivanja hesperidina u farmaceutskim preparatima. Linearna zavisnost pri određivanju hesperidina u farmaceutskim preparatima dobijena je u intervalu 0,05-10,00 μg mL-1. Granica detekcije je iznosila 0,01, a granica kvantifikacije je 0,03 μg mL-1. Linearna zavisnost pri određivanju hesperidina u humanom serumu je dobijena u intervalu 0,02-10,00 μg mL-1 sa granicom detekcije od 0,005 i granicom kvantifikacije od 0,015 μg mL-1. Dobro slaganje između ove dve metode pokazuje primenljivost fluorimetrijske metode u kliničkim laboratorijama i laboratorijama za kontrolu kvaliteta. Predložena fluorimetrijska metoda je jednostavna, pouzdana i precizna za određivanje hesperidina u humanom serumu i farmaceutskim preparatima.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms
T1  - Razvoj i validacija fluorimetrijske metode za određivanje hesperidina u humanom serumu i farmaceutskim preparatima
VL  - 77
IS  - 11
SP  - 1625
EP  - 1640
DO  - 10.2298/JSC111005060P
ER  - 
@article{
author = "Pavun, Leposava and Dimitrić-Marković, Jasmina and Đurđević, Predrag and Jelikić-Stankov, Milena and Đikanović, Daniela and Ćirić, Andrija and Malešev, Dušan",
year = "2012",
abstract = "A fluorometric method, based on the fluorescence properties of the aluminium(III)-hesperidin complex, for the determination of hesperidin in human plasma and pharmaceutical forms has been developed and validated. The complex shows a strong emission in the presence of the surfactant betain sulphonate SB 12 at 476 nm with excitation at 390 nm. The linearity range for pharmaceutical forms of hesperidin was 0.06-24.4 μg mL-1 with a limit of detection, LOD, of 0.016 μg mL-1 and a limit of quantification, LOQ, of 0.049 μg mL-1. Recovery values in the range 99.3-99.7 % indicate good accuracy of the method. A linear dependence of the intensity of fluorescence of the complex on the concentration of hesperidin in plasma was obtained in concentration range from 0.1-12.2 μg mL-1. The LOD was 0.032 μg mL-1 while LOQ was 0.096 μg mL-1. Recovery values were in the range 98.4-99.8 %. The reliability of the method was checked by an LC-MS/MS method for plasma samples and an HPLC/UV method for tablets with direct determination of hesperidin after separation. Linearity range in determination of hesperidin in pharmaceutical forms was obtained in the range from 0.05 to 10.00 μg mL-1. The LOD was 0.01 μg mL-1 and the LOQ was 0.03 μg mL-1. The linearity range for the determination of hesperidin in plasma was 0.02-10.00 μg mL-1 with an LOD 0.005 μg mL-1 and an LOQ of 0.015 μg mL-1. The good agreement between the two methods indicates the usability of the proposed fluorometric method for the simple, precise and accurate determination of hesperidin in clinical and quality control laboratories., Razvijena je fluorimetrijska metoda za određivanje hesperidina u humanom serumu i farmaceutskim preparatima koja se zasniva na fluorescenciji kompleksa aluminijum(III)-hesperidin. Kompleks pokazuje intenzivnu fluorescenciju u prisustvu surfaktanta SB 12 na 476 nm prilikom ekscitacije na 390 nm. Linearna zavisnost intenziteta fluorescencije od koncentracije pri određivanju hesperidina u farmaceutskim preparatima dobijena je u koncentracionom opsegu 0,06-24,4 μg mL-1 sa granicom detekcije od 0,016 μg mL-1 i granicom kvantifikacije od 0,049 μg mL-1. Dobijene 'recovery' vrednosti u intervalu 99,3-99,7 % pokazuju veliku preciznost metode. Linearna zavisnost intenziteta fluorescencije kompeksa od koncentacije hesperidina dobijena je u koncentracionom opsegu 0,1-12,2 μg mL-1 sa granicom detekcije od 0,032 μg mL-1 i granicom kvantifikacije od 0,096 μg mL-1. 'Recovery' vrednosti su dobijene u opsegu 98,4 do 99,8 %. Pouzdanost metode proverena je LC-MS/MS metodom za određivanje hesperidina u serumu, a HPLC/UV metodom proverena je pouzdanost prilikom određivanja hesperidina u farmaceutskim preparatima. Linearna zavisnost pri određivanju hesperidina u farmaceutskim preparatima dobijena je u intervalu 0,05-10,00 μg mL-1. Granica detekcije je iznosila 0,01, a granica kvantifikacije je 0,03 μg mL-1. Linearna zavisnost pri određivanju hesperidina u humanom serumu je dobijena u intervalu 0,02-10,00 μg mL-1 sa granicom detekcije od 0,005 i granicom kvantifikacije od 0,015 μg mL-1. Dobro slaganje između ove dve metode pokazuje primenljivost fluorimetrijske metode u kliničkim laboratorijama i laboratorijama za kontrolu kvaliteta. Predložena fluorimetrijska metoda je jednostavna, pouzdana i precizna za određivanje hesperidina u humanom serumu i farmaceutskim preparatima.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms, Razvoj i validacija fluorimetrijske metode za određivanje hesperidina u humanom serumu i farmaceutskim preparatima",
volume = "77",
number = "11",
pages = "1625-1640",
doi = "10.2298/JSC111005060P"
}
Pavun, L., Dimitrić-Marković, J., Đurđević, P., Jelikić-Stankov, M., Đikanović, D., Ćirić, A.,& Malešev, D.. (2012). Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 77(11), 1625-1640.
https://doi.org/10.2298/JSC111005060P
Pavun L, Dimitrić-Marković J, Đurđević P, Jelikić-Stankov M, Đikanović D, Ćirić A, Malešev D. Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms. in Journal of the Serbian Chemical Society. 2012;77(11):1625-1640.
doi:10.2298/JSC111005060P .
Pavun, Leposava, Dimitrić-Marković, Jasmina, Đurđević, Predrag, Jelikić-Stankov, Milena, Đikanović, Daniela, Ćirić, Andrija, Malešev, Dušan, "Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms" in Journal of the Serbian Chemical Society, 77, no. 11 (2012):1625-1640,
https://doi.org/10.2298/JSC111005060P . .
10
5
10

Spectrofluorimetric and HPLC Determination of Morin in Human Serum

Pavun, Leposava; Đikanović, Daniela; Đurđević, Predrag; Jelikić-Stankov, Milena; Malešev, Dušan; Ćirić, Andrija

(Slovensko Kemijsko Drustvo, Ljubljana, 2009)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Đikanović, Daniela
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Malešev, Dušan
AU  - Ćirić, Andrija
PY  - 2009
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1205
AB  - Morin is a flavonol antioxidant. In ethanol-water mixtures (70 wt% of ethanol) it reacts with Al(3+) to give Al(Morin)(2) in the pH range 3-6. The conditional stability constant of this complex at 298 K was found to be log beta(2) = 16.96 +/- 0.02 at pH 4.40. The complex shows strong fluorescence emission at 500 nm upon excitation at 410 nm. The fluorescence intensity is pH dependent with maximum emission at pH 4.40. Since the complexation reaction enhances the fluorescence of morin, this property was used for the determination of morin in human serum. A linear dependence of the intensity of fluorescence of the complex on the concentration of morin was obtained in morin concentration range from 1.5-30.5 ng mL(-1), relative standard error of measurements was 1.4%. The LOD was 0.02 ng mL(-1) while LOQ was 1.0 ng mL(-1). Serum concentration of morin was also determined using HPLC as a reference method. A C-18 Hypersil Gold AQ column was used with acetonitrile-0.1% v/v phosphoric acid (30:70% v/v) as the mobile phase at 1.0 mL min(-1) flow rate and UV detection at 250 nm. Acceptable relative standard errors (less than 5%) between determinations obtained by the two methods indicate that the fluorescence method is reliable.
PB  - Slovensko Kemijsko Drustvo, Ljubljana
T2  - Acta Chimica Slovenica
T1  - Spectrofluorimetric and HPLC Determination of Morin in Human Serum
VL  - 56
IS  - 4
SP  - 967
EP  - 972
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1205
ER  - 
@article{
author = "Pavun, Leposava and Đikanović, Daniela and Đurđević, Predrag and Jelikić-Stankov, Milena and Malešev, Dušan and Ćirić, Andrija",
year = "2009",
abstract = "Morin is a flavonol antioxidant. In ethanol-water mixtures (70 wt% of ethanol) it reacts with Al(3+) to give Al(Morin)(2) in the pH range 3-6. The conditional stability constant of this complex at 298 K was found to be log beta(2) = 16.96 +/- 0.02 at pH 4.40. The complex shows strong fluorescence emission at 500 nm upon excitation at 410 nm. The fluorescence intensity is pH dependent with maximum emission at pH 4.40. Since the complexation reaction enhances the fluorescence of morin, this property was used for the determination of morin in human serum. A linear dependence of the intensity of fluorescence of the complex on the concentration of morin was obtained in morin concentration range from 1.5-30.5 ng mL(-1), relative standard error of measurements was 1.4%. The LOD was 0.02 ng mL(-1) while LOQ was 1.0 ng mL(-1). Serum concentration of morin was also determined using HPLC as a reference method. A C-18 Hypersil Gold AQ column was used with acetonitrile-0.1% v/v phosphoric acid (30:70% v/v) as the mobile phase at 1.0 mL min(-1) flow rate and UV detection at 250 nm. Acceptable relative standard errors (less than 5%) between determinations obtained by the two methods indicate that the fluorescence method is reliable.",
publisher = "Slovensko Kemijsko Drustvo, Ljubljana",
journal = "Acta Chimica Slovenica",
title = "Spectrofluorimetric and HPLC Determination of Morin in Human Serum",
volume = "56",
number = "4",
pages = "967-972",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1205"
}
Pavun, L., Đikanović, D., Đurđević, P., Jelikić-Stankov, M., Malešev, D.,& Ćirić, A.. (2009). Spectrofluorimetric and HPLC Determination of Morin in Human Serum. in Acta Chimica Slovenica
Slovensko Kemijsko Drustvo, Ljubljana., 56(4), 967-972.
https://hdl.handle.net/21.15107/rcub_farfar_1205
Pavun L, Đikanović D, Đurđević P, Jelikić-Stankov M, Malešev D, Ćirić A. Spectrofluorimetric and HPLC Determination of Morin in Human Serum. in Acta Chimica Slovenica. 2009;56(4):967-972.
https://hdl.handle.net/21.15107/rcub_farfar_1205 .
Pavun, Leposava, Đikanović, Daniela, Đurđević, Predrag, Jelikić-Stankov, Milena, Malešev, Dušan, Ćirić, Andrija, "Spectrofluorimetric and HPLC Determination of Morin in Human Serum" in Acta Chimica Slovenica, 56, no. 4 (2009):967-972,
https://hdl.handle.net/21.15107/rcub_farfar_1205 .
17
20

Compounds of Mo, V and W in biochemistry and their biomedical activity

Jelikić-Stankov, Milena; Uskoković-Marković, Snežana; Holclajtner-Antunović, Ivanka; Todorović, Marija R.; Đurđević, Predrag

(Elsevier Gmbh, Urban & Fischer Verlag, Jena, 2007)

TY  - JOUR
AU  - Jelikić-Stankov, Milena
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
AU  - Todorović, Marija R.
AU  - Đurđević, Predrag
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/912
AB  - Molybdenum, vanadium and tungsten compounds are widely applied as analytical reagents for determination of numerous pharmacologically active substances and different biochemical parameters. Recent data from the available literature pointed to a very potent biomedical activity of compounds containing these trace elements. The present paper represents a survey on the structure and chemical properties of these compounds, as well as on their biological activity, mostly based on their interaction with cations of biomolecules, such as phospholipids and proteins. Besides, their potent inhibitory effects on cellular targets, bacterial and viral DNA and RNA polymerases will be discussed, as well. Numerous authors clearly demonstrated the antiviral (especially anti-HIV), anticoagulant and antineoplastic properties of the compounds containing the above trace elements. It has been also shown that these compounds act on some cellular enzymatic systems leading to the normalisation of blood pressure, blood glucose and serum lipid levels. Also, compounds of these trace elements represent potent antiobesity agents and express hepatoprotective and antioxidative stress activity.
PB  - Elsevier Gmbh, Urban & Fischer Verlag, Jena
T2  - Journal of Trace Elements in Medicine and Biology
T1  - Compounds of Mo, V and W in biochemistry and their biomedical activity
VL  - 21
IS  - 1
SP  - 8
EP  - 16
DO  - 10.1016/j.jtemb.2006.11.004
ER  - 
@article{
author = "Jelikić-Stankov, Milena and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka and Todorović, Marija R. and Đurđević, Predrag",
year = "2007",
abstract = "Molybdenum, vanadium and tungsten compounds are widely applied as analytical reagents for determination of numerous pharmacologically active substances and different biochemical parameters. Recent data from the available literature pointed to a very potent biomedical activity of compounds containing these trace elements. The present paper represents a survey on the structure and chemical properties of these compounds, as well as on their biological activity, mostly based on their interaction with cations of biomolecules, such as phospholipids and proteins. Besides, their potent inhibitory effects on cellular targets, bacterial and viral DNA and RNA polymerases will be discussed, as well. Numerous authors clearly demonstrated the antiviral (especially anti-HIV), anticoagulant and antineoplastic properties of the compounds containing the above trace elements. It has been also shown that these compounds act on some cellular enzymatic systems leading to the normalisation of blood pressure, blood glucose and serum lipid levels. Also, compounds of these trace elements represent potent antiobesity agents and express hepatoprotective and antioxidative stress activity.",
publisher = "Elsevier Gmbh, Urban & Fischer Verlag, Jena",
journal = "Journal of Trace Elements in Medicine and Biology",
title = "Compounds of Mo, V and W in biochemistry and their biomedical activity",
volume = "21",
number = "1",
pages = "8-16",
doi = "10.1016/j.jtemb.2006.11.004"
}
Jelikić-Stankov, M., Uskoković-Marković, S., Holclajtner-Antunović, I., Todorović, M. R.,& Đurđević, P.. (2007). Compounds of Mo, V and W in biochemistry and their biomedical activity. in Journal of Trace Elements in Medicine and Biology
Elsevier Gmbh, Urban & Fischer Verlag, Jena., 21(1), 8-16.
https://doi.org/10.1016/j.jtemb.2006.11.004
Jelikić-Stankov M, Uskoković-Marković S, Holclajtner-Antunović I, Todorović MR, Đurđević P. Compounds of Mo, V and W in biochemistry and their biomedical activity. in Journal of Trace Elements in Medicine and Biology. 2007;21(1):8-16.
doi:10.1016/j.jtemb.2006.11.004 .
Jelikić-Stankov, Milena, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, Todorović, Marija R., Đurđević, Predrag, "Compounds of Mo, V and W in biochemistry and their biomedical activity" in Journal of Trace Elements in Medicine and Biology, 21, no. 1 (2007):8-16,
https://doi.org/10.1016/j.jtemb.2006.11.004 . .
39
34
42

Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium

Đurđević, Predrag; Jelikić-Stankov, Milena; Odović, Jadranka

(Pergamon-Elsevier Science Ltd, Oxford, 2000)

TY  - JOUR
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Odović, Jadranka
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/255
AB  - Prototropic equilibria (protonation, hydrolytic and complexation) in iron(III) ion + ciprofloxacin (Hcipx) solutions were studied in 0.1 and 0.5 mol dm(-3) (Na)NO3 ionic media in the absence and in the presence of ionic surfactants: sodium dodecyl sulfate (SDS) or cetyltrimethylammonium bromide (CTAB). Experiments were carried out at 298 +/- 0.2 K using glass electrode potentiometric and UV-Vis spectrophotometric measurements. The concentration of SDS in Fe-III-ciprofloxacin solutions was 10 mmol dm(-3) while that of CTAB was 8 mmol dm(-3). The hydrolysis of the iron(III) ion was studied separately within the concentration range of iron 1-5 mmol dm(-3) and pH 1.6-3.0, Non-linear least-squares treatment of the data indicates that in both ionic media studied the main hydrolytic products were Fe(OH)(2)(+) and Fe-2(OH)(2)(4+). The effect of the concentration of the nitrate ion on the stability constants of these complexes is much more pronounced than the effect of the addition of either SDS or CTAB. The successive protonation constants of ciprofloxacin anion, cipx(-), relating to the formation of Hcipx and H(2)cipx(+) species, were influenced to a significant extent by the presence of SDS and, to a considerably lesser extent, by the presence of CTAB in both studied concentrations of NO3- ionic media. The complexation between iron(III) and ciprofloxacin was studied in the concentration range of iron(III) 0.15-0.58 mmol dm(-3), with ligand to metal concentration ratios ranging from 3.1 to 10:1 in the pH interval 2.0-6.0. The experimental data obtained could be explained by the formation of mononuclear complexes: Fe(cipx)(2)(+), Fe(cipx)(2+) and Fe(OH)cipx. In the presence of either SDS or CTAB the same complexes were formed; however. much higher formation constants were obtained with SDS. while the effect of CTAB was sluggish. The structure and mechanism of formation of iron (III)-ciprofloxacin complexes in pure ionic and in micellar media are discussed.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Polyhedron
T1  - Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium
VL  - 19
IS  - 9
SP  - 1085
EP  - 1096
DO  - 10.1016/S0277-5387(00)00357-0
ER  - 
@article{
author = "Đurđević, Predrag and Jelikić-Stankov, Milena and Odović, Jadranka",
year = "2000",
abstract = "Prototropic equilibria (protonation, hydrolytic and complexation) in iron(III) ion + ciprofloxacin (Hcipx) solutions were studied in 0.1 and 0.5 mol dm(-3) (Na)NO3 ionic media in the absence and in the presence of ionic surfactants: sodium dodecyl sulfate (SDS) or cetyltrimethylammonium bromide (CTAB). Experiments were carried out at 298 +/- 0.2 K using glass electrode potentiometric and UV-Vis spectrophotometric measurements. The concentration of SDS in Fe-III-ciprofloxacin solutions was 10 mmol dm(-3) while that of CTAB was 8 mmol dm(-3). The hydrolysis of the iron(III) ion was studied separately within the concentration range of iron 1-5 mmol dm(-3) and pH 1.6-3.0, Non-linear least-squares treatment of the data indicates that in both ionic media studied the main hydrolytic products were Fe(OH)(2)(+) and Fe-2(OH)(2)(4+). The effect of the concentration of the nitrate ion on the stability constants of these complexes is much more pronounced than the effect of the addition of either SDS or CTAB. The successive protonation constants of ciprofloxacin anion, cipx(-), relating to the formation of Hcipx and H(2)cipx(+) species, were influenced to a significant extent by the presence of SDS and, to a considerably lesser extent, by the presence of CTAB in both studied concentrations of NO3- ionic media. The complexation between iron(III) and ciprofloxacin was studied in the concentration range of iron(III) 0.15-0.58 mmol dm(-3), with ligand to metal concentration ratios ranging from 3.1 to 10:1 in the pH interval 2.0-6.0. The experimental data obtained could be explained by the formation of mononuclear complexes: Fe(cipx)(2)(+), Fe(cipx)(2+) and Fe(OH)cipx. In the presence of either SDS or CTAB the same complexes were formed; however. much higher formation constants were obtained with SDS. while the effect of CTAB was sluggish. The structure and mechanism of formation of iron (III)-ciprofloxacin complexes in pure ionic and in micellar media are discussed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Polyhedron",
title = "Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium",
volume = "19",
number = "9",
pages = "1085-1096",
doi = "10.1016/S0277-5387(00)00357-0"
}
Đurđević, P., Jelikić-Stankov, M.,& Odović, J.. (2000). Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium. in Polyhedron
Pergamon-Elsevier Science Ltd, Oxford., 19(9), 1085-1096.
https://doi.org/10.1016/S0277-5387(00)00357-0
Đurđević P, Jelikić-Stankov M, Odović J. Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium. in Polyhedron. 2000;19(9):1085-1096.
doi:10.1016/S0277-5387(00)00357-0 .
Đurđević, Predrag, Jelikić-Stankov, Milena, Odović, Jadranka, "Study of solution equilibria between iron(III) ion and ciprofloxacin in pure nitrate ionic medium and micellar medium" in Polyhedron, 19, no. 9 (2000):1085-1096,
https://doi.org/10.1016/S0277-5387(00)00357-0 . .
13
11
14

Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent

Đurđević, Predrag; Todorović, M; Jelikić-Stankov, Milena; Odović, Jadranka

(Marcel Dekker Inc, New York, 2000)

TY  - JOUR
AU  - Đurđević, Predrag
AU  - Todorović, M
AU  - Jelikić-Stankov, Milena
AU  - Odović, Jadranka
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/250
AB  - An analytical procedure for the determination of ciprofloxacin in serum without previous extraction has been developed. The determination was carried out using iron(III) nitrate as chromogenic agent, with the addition of sodium dodecylsulfate, at pH = 3.0. Absorbance was measured at 430 nn. The range of linearity was between 0.5 - 20.0 mu g/mL with a detection limit 0.2 mu g/mL.
PB  - Marcel Dekker Inc, New York
T2  - Analytical Letters
T1  - Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent
VL  - 33
IS  - 4
SP  - 657
EP  - 665
DO  - 10.1080/00032710008543081
ER  - 
@article{
author = "Đurđević, Predrag and Todorović, M and Jelikić-Stankov, Milena and Odović, Jadranka",
year = "2000",
abstract = "An analytical procedure for the determination of ciprofloxacin in serum without previous extraction has been developed. The determination was carried out using iron(III) nitrate as chromogenic agent, with the addition of sodium dodecylsulfate, at pH = 3.0. Absorbance was measured at 430 nn. The range of linearity was between 0.5 - 20.0 mu g/mL with a detection limit 0.2 mu g/mL.",
publisher = "Marcel Dekker Inc, New York",
journal = "Analytical Letters",
title = "Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent",
volume = "33",
number = "4",
pages = "657-665",
doi = "10.1080/00032710008543081"
}
Đurđević, P., Todorović, M., Jelikić-Stankov, M.,& Odović, J.. (2000). Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent. in Analytical Letters
Marcel Dekker Inc, New York., 33(4), 657-665.
https://doi.org/10.1080/00032710008543081
Đurđević P, Todorović M, Jelikić-Stankov M, Odović J. Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent. in Analytical Letters. 2000;33(4):657-665.
doi:10.1080/00032710008543081 .
Đurđević, Predrag, Todorović, M, Jelikić-Stankov, Milena, Odović, Jadranka, "Spectrophotometric determination of ciprofloxacin in serum using iron(III) ion as chromogenic agent" in Analytical Letters, 33, no. 4 (2000):657-665,
https://doi.org/10.1080/00032710008543081 . .
18
13
19

Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry

Jelikić-Stankov, Milena; Odović, Jadranka; Stankov, D; Đurđević, Predrag

(Pergamon-Elsevier Science Ltd, Oxford, 1998)

TY  - JOUR
AU  - Jelikić-Stankov, Milena
AU  - Odović, Jadranka
AU  - Stankov, D
AU  - Đurđević, Predrag
PY  - 1998
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/194
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Journal of Pharmaceutical and Biomedical Analysis
T1  - Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry
VL  - 18
IS  - 1-2
SP  - 145
EP  - 150
DO  - 10.1016/S0731-7085(98)00151-4
ER  - 
@article{
author = "Jelikić-Stankov, Milena and Odović, Jadranka and Stankov, D and Đurđević, Predrag",
year = "1998",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Journal of Pharmaceutical and Biomedical Analysis",
title = "Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry",
volume = "18",
number = "1-2",
pages = "145-150",
doi = "10.1016/S0731-7085(98)00151-4"
}
Jelikić-Stankov, M., Odović, J., Stankov, D.,& Đurđević, P.. (1998). Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry. in Journal of Pharmaceutical and Biomedical Analysis
Pergamon-Elsevier Science Ltd, Oxford., 18(1-2), 145-150.
https://doi.org/10.1016/S0731-7085(98)00151-4
Jelikić-Stankov M, Odović J, Stankov D, Đurđević P. Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry. in Journal of Pharmaceutical and Biomedical Analysis. 1998;18(1-2):145-150.
doi:10.1016/S0731-7085(98)00151-4 .
Jelikić-Stankov, Milena, Odović, Jadranka, Stankov, D, Đurđević, Predrag, "Determination of fleroxacin in human serum and in dosage forms by derivative UV spectrophotometry" in Journal of Pharmaceutical and Biomedical Analysis, 18, no. 1-2 (1998):145-150,
https://doi.org/10.1016/S0731-7085(98)00151-4 . .
10
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17