TY  - JOUR
AU  - Laličić-Petronijević, Jovanka
AU  - Komes, Draženka
AU  - Gorjanović, Stanislava
AU  - Belscak-Cvitanović, Ana
AU  - Pezo, Lato
AU  - Pastor, Ferenc T.
AU  - Ostojić, Sanja
AU  - Popov-Raljić, Jovanka
AU  - Suznjević, Desanka
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4194
AB  - Antioxidant (AO) capacity of chocolates with 27, 44 and 75 % cocoa was assessed after production and during twelve months of storage by direct current (DC) polarographic assay, based on the decrease of anodic current caused by the formation of hydroxo-perhydroxyl mercury(II) complex (HPMC) in alkaline solutions of hydrogen peroxide at potentials of mercury oxidation, and two spectrophotometric assays. Relative antioxidant capacity index (RACI) was calculated by taking the average value of the AO assay (the sample mass in all assays was identical). Oxidative stability of chocolate fat was determined by differential scanning calorimetry. Measured parameters and RACI were correlated mutually and with the content of total phenols (Folin-Ciocalteu assay), flavan-3-ols (vanillin and p-dimethylaminocinnamaldehyde assay) and proanthocyanidins (modified Bate-Smith assay). During storage, the studied functional and health-related characteristics remained unchanged. Amongst applied AO assays, the DC polarographic one, whose validity was confirmed by two-way ANOVA and F-test, correlated most significantly with oxidative stability (oxidation onset temperature and induction time). In addition, principal component analysis was applied to characterise chocolate types.
PB  - University of Zagreb
T2  - Food Technology and Biotechnology
T1  - Content of Total Phenolics, Flavan-3-Ols and Proanthocyanidins, Oxidative Stability and Antioxidant Capacity of Chocolate During Storage
EP  - 20
IS  - 1
SP  - 13
VL  - 54
DO  - 10.17113/ftb.54.01.16.4014
ER  - 

@article{
author = "Laličić-Petronijević, Jovanka and Komes, Draženka and Gorjanović, Stanislava and Belscak-Cvitanović, Ana and Pezo, Lato and Pastor, Ferenc T. and Ostojić, Sanja and Popov-Raljić, Jovanka and Suznjević, Desanka",
year = "2016",
abstract = "Antioxidant (AO) capacity of chocolates with 27, 44 and 75 % cocoa was assessed after production and during twelve months of storage by direct current (DC) polarographic assay, based on the decrease of anodic current caused by the formation of hydroxo-perhydroxyl mercury(II) complex (HPMC) in alkaline solutions of hydrogen peroxide at potentials of mercury oxidation, and two spectrophotometric assays. Relative antioxidant capacity index (RACI) was calculated by taking the average value of the AO assay (the sample mass in all assays was identical). Oxidative stability of chocolate fat was determined by differential scanning calorimetry. Measured parameters and RACI were correlated mutually and with the content of total phenols (Folin-Ciocalteu assay), flavan-3-ols (vanillin and p-dimethylaminocinnamaldehyde assay) and proanthocyanidins (modified Bate-Smith assay). During storage, the studied functional and health-related characteristics remained unchanged. Amongst applied AO assays, the DC polarographic one, whose validity was confirmed by two-way ANOVA and F-test, correlated most significantly with oxidative stability (oxidation onset temperature and induction time). In addition, principal component analysis was applied to characterise chocolate types.",
publisher = "University of Zagreb",
journal = "Food Technology and Biotechnology",
title = "Content of Total Phenolics, Flavan-3-Ols and Proanthocyanidins, Oxidative Stability and Antioxidant Capacity of Chocolate During Storage",
pages = "20-13",
number = "1",
volume = "54",
doi = "10.17113/ftb.54.01.16.4014"
}

Laličić-Petronijević, J., Komes, D., Gorjanović, S., Belscak-Cvitanović, A., Pezo, L., Pastor, F. T., Ostojić, S., Popov-Raljić, J.,& Suznjević, D.. (2016). Content of Total Phenolics, Flavan-3-Ols and Proanthocyanidins, Oxidative Stability and Antioxidant Capacity of Chocolate During Storage. in Food Technology and Biotechnology
University of Zagreb., 54(1), 13-20.
https://doi.org/10.17113/ftb.54.01.16.4014

Laličić-Petronijević J, Komes D, Gorjanović S, Belscak-Cvitanović A, Pezo L, Pastor FT, Ostojić S, Popov-Raljić J, Suznjević D. Content of Total Phenolics, Flavan-3-Ols and Proanthocyanidins, Oxidative Stability and Antioxidant Capacity of Chocolate During Storage. in Food Technology and Biotechnology. 2016;54(1):13-20.
doi:10.17113/ftb.54.01.16.4014 .

Laličić-Petronijević, Jovanka, Komes, Draženka, Gorjanović, Stanislava, Belscak-Cvitanović, Ana, Pezo, Lato, Pastor, Ferenc T., Ostojić, Sanja, Popov-Raljić, Jovanka, Suznjević, Desanka, "Content of Total Phenolics, Flavan-3-Ols and Proanthocyanidins, Oxidative Stability and Antioxidant Capacity of Chocolate During Storage" in Food Technology and Biotechnology, 54, no. 1 (2016):13-20,
https://doi.org/10.17113/ftb.54.01.16.4014 . .

TY  - JOUR
AU  - Petrović, Marija
AU  - Suznjević, Desanka
AU  - Pastor, Ferenc T.
AU  - Veljović, Mile
AU  - Pezo, Lato
AU  - Antić, Mališa
AU  - Gorjanović, Stanislava
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4140
AB  - Antioxidant (AO) capacity of various medicinal plants extracts and phenolic compounds was assessed by the most widely used spectrophotometric assays such as ferric reducing antioxidant power (FRAP) and scavenging of 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). In addition, two direct current (DC) polarographic assays, one based on a decrease of anodic current of [Hg(O2H)(OH)]-HydroxoPerhydroxoMercury(II) Complex (HPMC) formation in alkaline solution of H2O2, at the potential of mercury dissolution and another recently developed Mercury Reduction Antioxidant Power (MRAP), based on a a decrease of cathodic current of Hg(II) reduction were employed. Percentage of both currents decrease was plotted versus the volume of gradually added complex samples or the amount of individual ones and the slopes of these plots were used to express AO capacity. Total phenolic content (TPC) of extracts was determined by Folin-Ciocalteu (FC) assay. Correlations between applied assays were calculated by regression analysis. Relative Antioxidant Capacity Index (RACI), calculated by assigning equal weight to all applied assays and Phenolic Antioxidant Coefficients (PAC), calculated as a ratio between particular AO capacity and TPC, were used to achieve more comprehensive comparison between analyzed samples, as well as applied assays.
PB  - Bentham Science Publ Ltd, Sharjah
T2  - Combinatorial Chemistry & High Throughput Screening
T1  - Antioxidant Capacity Determination of Complex Samples and Individual Phenolics - Multilateral Approach
EP  - 65
IS  - 1
SP  - 58
VL  - 19
DO  - 10.2174/1386207318666151102094227
ER  - 

@article{
author = "Petrović, Marija and Suznjević, Desanka and Pastor, Ferenc T. and Veljović, Mile and Pezo, Lato and Antić, Mališa and Gorjanović, Stanislava",
year = "2016",
abstract = "Antioxidant (AO) capacity of various medicinal plants extracts and phenolic compounds was assessed by the most widely used spectrophotometric assays such as ferric reducing antioxidant power (FRAP) and scavenging of 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). In addition, two direct current (DC) polarographic assays, one based on a decrease of anodic current of [Hg(O2H)(OH)]-HydroxoPerhydroxoMercury(II) Complex (HPMC) formation in alkaline solution of H2O2, at the potential of mercury dissolution and another recently developed Mercury Reduction Antioxidant Power (MRAP), based on a a decrease of cathodic current of Hg(II) reduction were employed. Percentage of both currents decrease was plotted versus the volume of gradually added complex samples or the amount of individual ones and the slopes of these plots were used to express AO capacity. Total phenolic content (TPC) of extracts was determined by Folin-Ciocalteu (FC) assay. Correlations between applied assays were calculated by regression analysis. Relative Antioxidant Capacity Index (RACI), calculated by assigning equal weight to all applied assays and Phenolic Antioxidant Coefficients (PAC), calculated as a ratio between particular AO capacity and TPC, were used to achieve more comprehensive comparison between analyzed samples, as well as applied assays.",
publisher = "Bentham Science Publ Ltd, Sharjah",
journal = "Combinatorial Chemistry & High Throughput Screening",
title = "Antioxidant Capacity Determination of Complex Samples and Individual Phenolics - Multilateral Approach",
pages = "65-58",
number = "1",
volume = "19",
doi = "10.2174/1386207318666151102094227"
}

Petrović, M., Suznjević, D., Pastor, F. T., Veljović, M., Pezo, L., Antić, M.,& Gorjanović, S.. (2016). Antioxidant Capacity Determination of Complex Samples and Individual Phenolics - Multilateral Approach. in Combinatorial Chemistry & High Throughput Screening
Bentham Science Publ Ltd, Sharjah., 19(1), 58-65.
https://doi.org/10.2174/1386207318666151102094227

Petrović M, Suznjević D, Pastor FT, Veljović M, Pezo L, Antić M, Gorjanović S. Antioxidant Capacity Determination of Complex Samples and Individual Phenolics - Multilateral Approach. in Combinatorial Chemistry & High Throughput Screening. 2016;19(1):58-65.
doi:10.2174/1386207318666151102094227 .

Petrović, Marija, Suznjević, Desanka, Pastor, Ferenc T., Veljović, Mile, Pezo, Lato, Antić, Mališa, Gorjanović, Stanislava, "Antioxidant Capacity Determination of Complex Samples and Individual Phenolics - Multilateral Approach" in Combinatorial Chemistry & High Throughput Screening, 19, no. 1 (2016):58-65,
https://doi.org/10.2174/1386207318666151102094227 . .

TY  - JOUR
AU  - Suznjević, Desanka
AU  - Petrović, Marija
AU  - Pastor, Ferenc T.
AU  - Veljović, Mile
AU  - Zlatanović, Snežana
AU  - Antić, Mališa
AU  - Gorjanović, Stanislava
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3843
AB  - Direct current (DC) polarographic antioxidant (AO) HPMC assay based on the decrease of anodic limiting current of [Hg(O2H)(OH)] (HydroxoPerhydroxoMercury(II) Complex-HPMC), formed in alkaline solution of H2O2, at potential of mercury oxidation, occurring upon AO addition, was validated and widely used recently. Here, a novel DC polarographic assay, MRAP (Mercury Reduction Antioxidant Power), based on the decrease of Hg2+ cathodic current with addition of AOs was applied. Percentage of this decrease was plotted versus the amount of various individual phenolics or the volume of medicinal plant extracts, and the slope obtained was used to express AO activity. A high correlation between MRAP and HPMC assays was found for individual compounds (r = 0.974) and real samples (r = 0.968). MRAP was shown to be effective in the determination of AO activity of both synthetic mixtures of individual AOs and real samples containing various AOs. Agreement between the decrease of Hg2+ cathodic current and HPMC anodic current lead to the assumption that Hg2+ reduction causes a decrease in concentration of Hg2+ available for HMPC complex formation, i.e. its anodic current decrease. The validity Of MRAP assay was also confirmed through good correlation with FRAP assay.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Reduction of Hg2+ by Individual Phenolics and Complex Samples and Its Application in Polarographic Antioxidant Assay
EP  - H433
IS  - 7
SP  - H428
VL  - 162
DO  - 10.1149/2.0141507jes
ER  - 

@article{
author = "Suznjević, Desanka and Petrović, Marija and Pastor, Ferenc T. and Veljović, Mile and Zlatanović, Snežana and Antić, Mališa and Gorjanović, Stanislava",
year = "2015",
abstract = "Direct current (DC) polarographic antioxidant (AO) HPMC assay based on the decrease of anodic limiting current of [Hg(O2H)(OH)] (HydroxoPerhydroxoMercury(II) Complex-HPMC), formed in alkaline solution of H2O2, at potential of mercury oxidation, occurring upon AO addition, was validated and widely used recently. Here, a novel DC polarographic assay, MRAP (Mercury Reduction Antioxidant Power), based on the decrease of Hg2+ cathodic current with addition of AOs was applied. Percentage of this decrease was plotted versus the amount of various individual phenolics or the volume of medicinal plant extracts, and the slope obtained was used to express AO activity. A high correlation between MRAP and HPMC assays was found for individual compounds (r = 0.974) and real samples (r = 0.968). MRAP was shown to be effective in the determination of AO activity of both synthetic mixtures of individual AOs and real samples containing various AOs. Agreement between the decrease of Hg2+ cathodic current and HPMC anodic current lead to the assumption that Hg2+ reduction causes a decrease in concentration of Hg2+ available for HMPC complex formation, i.e. its anodic current decrease. The validity Of MRAP assay was also confirmed through good correlation with FRAP assay.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Reduction of Hg2+ by Individual Phenolics and Complex Samples and Its Application in Polarographic Antioxidant Assay",
pages = "H433-H428",
number = "7",
volume = "162",
doi = "10.1149/2.0141507jes"
}

Suznjević, D., Petrović, M., Pastor, F. T., Veljović, M., Zlatanović, S., Antić, M.,& Gorjanović, S.. (2015). Reduction of Hg2+ by Individual Phenolics and Complex Samples and Its Application in Polarographic Antioxidant Assay. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 162(7), H428-H433.
https://doi.org/10.1149/2.0141507jes

Suznjević D, Petrović M, Pastor FT, Veljović M, Zlatanović S, Antić M, Gorjanović S. Reduction of Hg2+ by Individual Phenolics and Complex Samples and Its Application in Polarographic Antioxidant Assay. in Journal of the Electrochemical Society. 2015;162(7):H428-H433.
doi:10.1149/2.0141507jes .

Suznjević, Desanka, Petrović, Marija, Pastor, Ferenc T., Veljović, Mile, Zlatanović, Snežana, Antić, Mališa, Gorjanović, Stanislava, "Reduction of Hg2+ by Individual Phenolics and Complex Samples and Its Application in Polarographic Antioxidant Assay" in Journal of the Electrochemical Society, 162, no. 7 (2015):H428-H433,
https://doi.org/10.1149/2.0141507jes . .

TY  - JOUR
AU  - Gorjanović, Stanislava
AU  - Rabrenović, Biljana
AU  - Novaković, Miroslav M.
AU  - Dimić, Etelka
AU  - Basić, Zorica N.
AU  - Suznjević, Desanka Z.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2713
AB  - Antioxidant (AO) activity of cold pressed pumpkin (Cucurbita pepo L.) seed oil, produced from three naked and one hulled variety, was assessed using a DC polarographic assay based on a hydrogen peroxide scavenge (HPS). Results are expressed as the decrease of the anodic oxidation current of hydrogen peroxide obtained upon addition of methanolic extract of the investigated oils. Strict correlations of HPS and (1) radical scavenging capacity against the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) (0.99), (2) the induction period estimated by a Rancimat test (0.99) and (3) total phenolic content estimated by Folin-Ciocalteu (FC) assay (0.99) were obtained. In addition, a significant correlation of HPS and the content of delta-tocopherol (0.87), squalene (0.67) and color CIE a* (-0.89) was found. Based on the results reported, the polarographic assay was found to be suitable for determination of AO activity as an indicator of the quality and oxidative stability of oil.
PB  - Wiley, Hoboken
T2  - Journal of the American Oil Chemists Society
T1  - Cold-Pressed Pumpkin Seed Oil Antioxidant Activity as Determined by a DC Polarographic Assay Based on Hydrogen Peroxide Scavenge
EP  - 1882
IS  - 12
SP  - 1875
VL  - 88
DO  - 10.1007/s11746-011-1863-3
ER  - 

@article{
author = "Gorjanović, Stanislava and Rabrenović, Biljana and Novaković, Miroslav M. and Dimić, Etelka and Basić, Zorica N. and Suznjević, Desanka Z.",
year = "2011",
abstract = "Antioxidant (AO) activity of cold pressed pumpkin (Cucurbita pepo L.) seed oil, produced from three naked and one hulled variety, was assessed using a DC polarographic assay based on a hydrogen peroxide scavenge (HPS). Results are expressed as the decrease of the anodic oxidation current of hydrogen peroxide obtained upon addition of methanolic extract of the investigated oils. Strict correlations of HPS and (1) radical scavenging capacity against the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) (0.99), (2) the induction period estimated by a Rancimat test (0.99) and (3) total phenolic content estimated by Folin-Ciocalteu (FC) assay (0.99) were obtained. In addition, a significant correlation of HPS and the content of delta-tocopherol (0.87), squalene (0.67) and color CIE a* (-0.89) was found. Based on the results reported, the polarographic assay was found to be suitable for determination of AO activity as an indicator of the quality and oxidative stability of oil.",
publisher = "Wiley, Hoboken",
journal = "Journal of the American Oil Chemists Society",
title = "Cold-Pressed Pumpkin Seed Oil Antioxidant Activity as Determined by a DC Polarographic Assay Based on Hydrogen Peroxide Scavenge",
pages = "1882-1875",
number = "12",
volume = "88",
doi = "10.1007/s11746-011-1863-3"
}

Gorjanović, S., Rabrenović, B., Novaković, M. M., Dimić, E., Basić, Z. N.,& Suznjević, D. Z.. (2011). Cold-Pressed Pumpkin Seed Oil Antioxidant Activity as Determined by a DC Polarographic Assay Based on Hydrogen Peroxide Scavenge. in Journal of the American Oil Chemists Society
Wiley, Hoboken., 88(12), 1875-1882.
https://doi.org/10.1007/s11746-011-1863-3

Gorjanović S, Rabrenović B, Novaković MM, Dimić E, Basić ZN, Suznjević DZ. Cold-Pressed Pumpkin Seed Oil Antioxidant Activity as Determined by a DC Polarographic Assay Based on Hydrogen Peroxide Scavenge. in Journal of the American Oil Chemists Society. 2011;88(12):1875-1882.
doi:10.1007/s11746-011-1863-3 .

Gorjanović, Stanislava, Rabrenović, Biljana, Novaković, Miroslav M., Dimić, Etelka, Basić, Zorica N., Suznjević, Desanka Z., "Cold-Pressed Pumpkin Seed Oil Antioxidant Activity as Determined by a DC Polarographic Assay Based on Hydrogen Peroxide Scavenge" in Journal of the American Oil Chemists Society, 88, no. 12 (2011):1875-1882,
https://doi.org/10.1007/s11746-011-1863-3 . .

TY  - JOUR
AU  - Novaković, Miroslav M.
AU  - Stevanović, Snežana
AU  - Gorjanović, Stanislava
AU  - Jovanović, Predrag M.
AU  - Tešević, Vele
AU  - Janković, Miodrag
AU  - Suznjević, Desanka Z.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2732
AB  - This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results confirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.
PB  - Wiley, Hoboken
T2  - Journal of Food Science
T1  - Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying
EP  - C668
IS  - 4
SP  - C663
VL  - 76
DO  - 10.1111/j.1750-3841.2011.02144.x
ER  - 

@article{
author = "Novaković, Miroslav M. and Stevanović, Snežana and Gorjanović, Stanislava and Jovanović, Predrag M. and Tešević, Vele and Janković, Miodrag and Suznjević, Desanka Z.",
year = "2011",
abstract = "This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results confirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.",
publisher = "Wiley, Hoboken",
journal = "Journal of Food Science",
title = "Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying",
pages = "C668-C663",
number = "4",
volume = "76",
doi = "10.1111/j.1750-3841.2011.02144.x"
}

Novaković, M. M., Stevanović, S., Gorjanović, S., Jovanović, P. M., Tešević, V., Janković, M.,& Suznjević, D. Z.. (2011). Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying. in Journal of Food Science
Wiley, Hoboken., 76(4), C663-C668.
https://doi.org/10.1111/j.1750-3841.2011.02144.x

Novaković MM, Stevanović S, Gorjanović S, Jovanović PM, Tešević V, Janković M, Suznjević DZ. Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying. in Journal of Food Science. 2011;76(4):C663-C668.
doi:10.1111/j.1750-3841.2011.02144.x .

Novaković, Miroslav M., Stevanović, Snežana, Gorjanović, Stanislava, Jovanović, Predrag M., Tešević, Vele, Janković, Miodrag, Suznjević, Desanka Z., "Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying" in Journal of Food Science, 76, no. 4 (2011):C663-C668,
https://doi.org/10.1111/j.1750-3841.2011.02144.x . .