TY  - JOUR
AU  - Karaman, Maja
AU  - Tesanović, Kristina
AU  - Gorjanović, Stanislava
AU  - Pastor, Ferenc
AU  - Simonović, Mladen
AU  - Glumac, Miodrag
AU  - Pejin, Boris
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1510
AB  - This study was focused on in vitro screening of the total antioxidant activity of the selected extracts of the mushroom Coprinus comatus and quinic acid, one of their antidiabetic ingredients, by an uncommon electrochemical assay. Indeed, direct current (DC) polarographic HydroxoPerhydroxo Mercury(II) Complex (HPMC) assay based on decrease of anodic limiting current originating from HPMC formation in alkaline solutions of hydrogen peroxide at potential of mercury dissolution, observed upon gradual addition of antioxidants, was applied herein for the estimation of the natural products' antioxidativity. Quinic acid was found to exhibit most promising antioxidant potential (4.0 +/- 0.2%mu L-1) being approximate to 2-fold more active than the screened C. comatus extract samples. Actually, such a finding puts some light on the antioxidativity of cyclic polyols, well understimated class of organic compounds, compared to aromatic (poly)phenolics. As a low cost, easy-to handle and accurate this polarographic assay may be thoroughly recommended for much broader use.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Natural Product Research
T1  - Polarography as a technique of choice for the evaluation of total antioxidant activity: The case study of selected Coprinus Comatus extracts and quinic acid, their antidiabetic ingredient
EP  - 1716
IS  - 10
SP  - 1711
VL  - 35
DO  - 10.1080/14786419.2019.1628753
ER  - 

@article{
author = "Karaman, Maja and Tesanović, Kristina and Gorjanović, Stanislava and Pastor, Ferenc and Simonović, Mladen and Glumac, Miodrag and Pejin, Boris",
year = "2021",
abstract = "This study was focused on in vitro screening of the total antioxidant activity of the selected extracts of the mushroom Coprinus comatus and quinic acid, one of their antidiabetic ingredients, by an uncommon electrochemical assay. Indeed, direct current (DC) polarographic HydroxoPerhydroxo Mercury(II) Complex (HPMC) assay based on decrease of anodic limiting current originating from HPMC formation in alkaline solutions of hydrogen peroxide at potential of mercury dissolution, observed upon gradual addition of antioxidants, was applied herein for the estimation of the natural products' antioxidativity. Quinic acid was found to exhibit most promising antioxidant potential (4.0 +/- 0.2%mu L-1) being approximate to 2-fold more active than the screened C. comatus extract samples. Actually, such a finding puts some light on the antioxidativity of cyclic polyols, well understimated class of organic compounds, compared to aromatic (poly)phenolics. As a low cost, easy-to handle and accurate this polarographic assay may be thoroughly recommended for much broader use.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Natural Product Research",
title = "Polarography as a technique of choice for the evaluation of total antioxidant activity: The case study of selected Coprinus Comatus extracts and quinic acid, their antidiabetic ingredient",
pages = "1716-1711",
number = "10",
volume = "35",
doi = "10.1080/14786419.2019.1628753"
}

Karaman, M., Tesanović, K., Gorjanović, S., Pastor, F., Simonović, M., Glumac, M.,& Pejin, B.. (2021). Polarography as a technique of choice for the evaluation of total antioxidant activity: The case study of selected Coprinus Comatus extracts and quinic acid, their antidiabetic ingredient. in Natural Product Research
Taylor & Francis Ltd, Abingdon., 35(10), 1711-1716.
https://doi.org/10.1080/14786419.2019.1628753

Karaman M, Tesanović K, Gorjanović S, Pastor F, Simonović M, Glumac M, Pejin B. Polarography as a technique of choice for the evaluation of total antioxidant activity: The case study of selected Coprinus Comatus extracts and quinic acid, their antidiabetic ingredient. in Natural Product Research. 2021;35(10):1711-1716.
doi:10.1080/14786419.2019.1628753 .

Karaman, Maja, Tesanović, Kristina, Gorjanović, Stanislava, Pastor, Ferenc, Simonović, Mladen, Glumac, Miodrag, Pejin, Boris, "Polarography as a technique of choice for the evaluation of total antioxidant activity: The case study of selected Coprinus Comatus extracts and quinic acid, their antidiabetic ingredient" in Natural Product Research, 35, no. 10 (2021):1711-1716,
https://doi.org/10.1080/14786419.2019.1628753 . .

TY  - JOUR
AU  - Janjusević, Ljiljana
AU  - Pejin, Boris
AU  - Kaisarević, Sonja
AU  - Gorjanović, Stanislava
AU  - Pastor, Ferenc
AU  - Tesanović, Kristina
AU  - Karaman, Maja
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1154
AB  - This study aimed to estimate antiradical, antioxidant (AO) and cytotoxic activities of the fungus Trametes versicolor ethanol fruiting body extract. The extract was found to effectively scavenge both O-2(center dot-) and NO center dot (29.62 and 52.48g/mL, respectively). It also showed a good AO activity in the polarographic HPMC assay (950%/mL). p-Hydroxybenzoic acid may be one of the responsible compounds for the afore-mentioned activities. The same extract also exhibited a concentration-dependent cytotoxicity against MCF-7 and HepG2 tumour cell lines reaching IC50 values of 123.51 and 134.29g/mL, respectively with no cytotoxic activity against normal MRC-5 cells. Gentisic, syringic and protocatechuic acids may be among the bioactive principles for the observed cytotoxicity. Taken all together, T. versicolor ethanol extract can be considered as a promising candidate for development of health promoting food supplement. [GRAPHICS] .
PB  - Taylor & Francis Ltd, Abingdon
T2  - Natural Product Research
T1  - Trametes versicolor ethanol extract, a promising candidate for health-promoting food supplement
EP  - 967
IS  - 8
SP  - 963
VL  - 32
DO  - 10.1080/14786419.2017.1366484
ER  - 

@article{
author = "Janjusević, Ljiljana and Pejin, Boris and Kaisarević, Sonja and Gorjanović, Stanislava and Pastor, Ferenc and Tesanović, Kristina and Karaman, Maja",
year = "2018",
abstract = "This study aimed to estimate antiradical, antioxidant (AO) and cytotoxic activities of the fungus Trametes versicolor ethanol fruiting body extract. The extract was found to effectively scavenge both O-2(center dot-) and NO center dot (29.62 and 52.48g/mL, respectively). It also showed a good AO activity in the polarographic HPMC assay (950%/mL). p-Hydroxybenzoic acid may be one of the responsible compounds for the afore-mentioned activities. The same extract also exhibited a concentration-dependent cytotoxicity against MCF-7 and HepG2 tumour cell lines reaching IC50 values of 123.51 and 134.29g/mL, respectively with no cytotoxic activity against normal MRC-5 cells. Gentisic, syringic and protocatechuic acids may be among the bioactive principles for the observed cytotoxicity. Taken all together, T. versicolor ethanol extract can be considered as a promising candidate for development of health promoting food supplement. [GRAPHICS] .",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Natural Product Research",
title = "Trametes versicolor ethanol extract, a promising candidate for health-promoting food supplement",
pages = "967-963",
number = "8",
volume = "32",
doi = "10.1080/14786419.2017.1366484"
}

Janjusević, L., Pejin, B., Kaisarević, S., Gorjanović, S., Pastor, F., Tesanović, K.,& Karaman, M.. (2018). Trametes versicolor ethanol extract, a promising candidate for health-promoting food supplement. in Natural Product Research
Taylor & Francis Ltd, Abingdon., 32(8), 963-967.
https://doi.org/10.1080/14786419.2017.1366484

Janjusević L, Pejin B, Kaisarević S, Gorjanović S, Pastor F, Tesanović K, Karaman M. Trametes versicolor ethanol extract, a promising candidate for health-promoting food supplement. in Natural Product Research. 2018;32(8):963-967.
doi:10.1080/14786419.2017.1366484 .

Janjusević, Ljiljana, Pejin, Boris, Kaisarević, Sonja, Gorjanović, Stanislava, Pastor, Ferenc, Tesanović, Kristina, Karaman, Maja, "Trametes versicolor ethanol extract, a promising candidate for health-promoting food supplement" in Natural Product Research, 32, no. 8 (2018):963-967,
https://doi.org/10.1080/14786419.2017.1366484 . .

TY  - JOUR
AU  - Gorjanović, Stanislava Z
AU  - Pastor, Ferenc
AU  - Vasic, Radica
AU  - Novaković, Miroslav M
AU  - Simonović, Mladen
AU  - Milić Komić, Sonja
AU  - Sužnjević, Desanka
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/682
AB  - Antioxidant (AO) activity of extracts of hop cones (Serbian domestic varieties) and commercial hop products (Saaz, Spalter, Spalter select, and Magnum pellets) was determined by parallel application of recently developed direct current (DC) polarographic and widely used DPPH assay. Correlations between 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging and total phenolics (TPC) determined by the Folin-Ciocalteu assay (FC) (0.99), and between H2O2 scavenging,: (HPS) and humulone content (H) determined by conductometric method (0.94), total resins (TR) (0.85), and hop storage index (HIS) (-0.90), were found statistically significant at p  lt  0.05 level while complete lack of HPS correlation with TPC and DPPH was observed. To obtain an insight into differences between results of AO assays applied, activity of individual compounds, prevalent hop phenolics, and bitter acids was determined. By far superior HPS activity of humulone was followed by catechin, quercetin, xanthohumol, lupulone, and rutin. In contrast, DPPH scavenging activity of phenolics (quercetin > catechin > rutin > xantohumol) was found substantially higher than activity of bitter acids. According to ferric reducing antioxidant power (FRAP) and scavenging of 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS), higher AO activity was ascribed to phenolics, while almost neglecting humulone. Besides reliability, low cost, and an easy-to-handle procedure, an ability to recognize humulone as the major contributor of hop AO activity could allow DC polarographic assay to be applied in analysis of various hop-derived products.
PB  - Amer Chemical Soc, Washington
T2  - Journal of Agricultural and Food Chemistry
T1  - Electrochemical versus Spectrophotometric Assessment of Antioxidant Activity of Hop (Humulus lupulus L.) Products and Individual Compounds
EP  - 9096
IS  - 38
SP  - 9089
VL  - 61
DO  - 10.1021/jf401718z
ER  - 

@article{
author = "Gorjanović, Stanislava Z and Pastor, Ferenc and Vasic, Radica and Novaković, Miroslav M and Simonović, Mladen and Milić Komić, Sonja and Sužnjević, Desanka",
year = "2013",
abstract = "Antioxidant (AO) activity of extracts of hop cones (Serbian domestic varieties) and commercial hop products (Saaz, Spalter, Spalter select, and Magnum pellets) was determined by parallel application of recently developed direct current (DC) polarographic and widely used DPPH assay. Correlations between 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging and total phenolics (TPC) determined by the Folin-Ciocalteu assay (FC) (0.99), and between H2O2 scavenging,: (HPS) and humulone content (H) determined by conductometric method (0.94), total resins (TR) (0.85), and hop storage index (HIS) (-0.90), were found statistically significant at p  lt  0.05 level while complete lack of HPS correlation with TPC and DPPH was observed. To obtain an insight into differences between results of AO assays applied, activity of individual compounds, prevalent hop phenolics, and bitter acids was determined. By far superior HPS activity of humulone was followed by catechin, quercetin, xanthohumol, lupulone, and rutin. In contrast, DPPH scavenging activity of phenolics (quercetin > catechin > rutin > xantohumol) was found substantially higher than activity of bitter acids. According to ferric reducing antioxidant power (FRAP) and scavenging of 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS), higher AO activity was ascribed to phenolics, while almost neglecting humulone. Besides reliability, low cost, and an easy-to-handle procedure, an ability to recognize humulone as the major contributor of hop AO activity could allow DC polarographic assay to be applied in analysis of various hop-derived products.",
publisher = "Amer Chemical Soc, Washington",
journal = "Journal of Agricultural and Food Chemistry",
title = "Electrochemical versus Spectrophotometric Assessment of Antioxidant Activity of Hop (Humulus lupulus L.) Products and Individual Compounds",
pages = "9096-9089",
number = "38",
volume = "61",
doi = "10.1021/jf401718z"
}

Gorjanović, S. Z., Pastor, F., Vasic, R., Novaković, M. M., Simonović, M., Milić Komić, S.,& Sužnjević, D.. (2013). Electrochemical versus Spectrophotometric Assessment of Antioxidant Activity of Hop (Humulus lupulus L.) Products and Individual Compounds. in Journal of Agricultural and Food Chemistry
Amer Chemical Soc, Washington., 61(38), 9089-9096.
https://doi.org/10.1021/jf401718z

Gorjanović SZ, Pastor F, Vasic R, Novaković MM, Simonović M, Milić Komić S, Sužnjević D. Electrochemical versus Spectrophotometric Assessment of Antioxidant Activity of Hop (Humulus lupulus L.) Products and Individual Compounds. in Journal of Agricultural and Food Chemistry. 2013;61(38):9089-9096.
doi:10.1021/jf401718z .

Gorjanović, Stanislava Z, Pastor, Ferenc, Vasic, Radica, Novaković, Miroslav M, Simonović, Mladen, Milić Komić, Sonja, Sužnjević, Desanka, "Electrochemical versus Spectrophotometric Assessment of Antioxidant Activity of Hop (Humulus lupulus L.) Products and Individual Compounds" in Journal of Agricultural and Food Chemistry, 61, no. 38 (2013):9089-9096,
https://doi.org/10.1021/jf401718z . .

TY  - JOUR
AU  - Milić Komić, Sonja
AU  - Potkonjak, Nebojša I
AU  - Gorjanović, Stanislava Z
AU  - Veljović-Jovanović, Sonja
AU  - Pastor, Ferenc
AU  - Sužnjević, Desanka
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/462
AB  - The behavior of chlorogenic acid (CGA) and its interaction with Hg(II), Pb(II), Cu(II), Cd(II) and Zn(II) has been studied using direct current (DC) and differential-pulse polarography (DPP). Adsorptive and kinetic/catalytic anodic waves of CGA have been detected at -0.02 and -0.18 V vs. SCE, respectively; Hg(I)-CGA surface disproportionation has been assumed. Reduction of Hg(II)-ions, added in the buffered solution of CGA (pH 7.5), occurs rather than complexation, while the complex forming ability of CGA towards Pb(II) and Cu(II) has been observed. Stoichiometry 1?:?1 for Pb(II)-CGA, and 1?:?1 and 1?:?2 for Cu(II)-CGA has been established applying Jobs method of continuous variation on DPP data. UV-vis spectrophotometric measurements additionally confirmed the existence and stoichiometry of Cu(II) complexes.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions
EP  - 2940
IS  - 12
SP  - 2935
VL  - 23
DO  - 10.1002/elan.201100476
ER  - 

@article{
author = "Milić Komić, Sonja and Potkonjak, Nebojša I and Gorjanović, Stanislava Z and Veljović-Jovanović, Sonja and Pastor, Ferenc and Sužnjević, Desanka",
year = "2011",
abstract = "The behavior of chlorogenic acid (CGA) and its interaction with Hg(II), Pb(II), Cu(II), Cd(II) and Zn(II) has been studied using direct current (DC) and differential-pulse polarography (DPP). Adsorptive and kinetic/catalytic anodic waves of CGA have been detected at -0.02 and -0.18 V vs. SCE, respectively; Hg(I)-CGA surface disproportionation has been assumed. Reduction of Hg(II)-ions, added in the buffered solution of CGA (pH 7.5), occurs rather than complexation, while the complex forming ability of CGA towards Pb(II) and Cu(II) has been observed. Stoichiometry 1?:?1 for Pb(II)-CGA, and 1?:?1 and 1?:?2 for Cu(II)-CGA has been established applying Jobs method of continuous variation on DPP data. UV-vis spectrophotometric measurements additionally confirmed the existence and stoichiometry of Cu(II) complexes.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions",
pages = "2940-2935",
number = "12",
volume = "23",
doi = "10.1002/elan.201100476"
}

Milić Komić, S., Potkonjak, N. I., Gorjanović, S. Z., Veljović-Jovanović, S., Pastor, F.,& Sužnjević, D.. (2011). A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions. in Electroanalysis
Wiley-Blackwell, Malden., 23(12), 2935-2940.
https://doi.org/10.1002/elan.201100476

Milić Komić S, Potkonjak NI, Gorjanović SZ, Veljović-Jovanović S, Pastor F, Sužnjević D. A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions. in Electroanalysis. 2011;23(12):2935-2940.
doi:10.1002/elan.201100476 .

Milić Komić, Sonja, Potkonjak, Nebojša I, Gorjanović, Stanislava Z, Veljović-Jovanović, Sonja, Pastor, Ferenc, Sužnjević, Desanka, "A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions" in Electroanalysis, 23, no. 12 (2011):2935-2940,
https://doi.org/10.1002/elan.201100476 . .