TY  - JOUR
AU  - Mirković, Snjezana
AU  - Rajković, Katarina
AU  - Jeremić, Sanja
AU  - Gavrilović, Marijana
AU  - Tomić, Ljiljana
AU  - Arsić-Arsenijević, Valentina
AU  - Krstić, Boro
PY  - 2018
UR  - https://imagine.imgge.bg.ac.rs/handle/123456789/1112
AB  - The objective of this paper was to assess the antiradical effectiveness of propolis extract (PE) based on 2.2-diphenyl-1-picrylhydrazyl radical (DPPH center dot) bleaching assay kinetic profile. The kinetic profile of scavenging DPPH center dot for PE exhibited one kinetic period characterized by one kinetic constant. The second-order rate constant (k(2)) for the oxidation of PE by DPPH center dot, determined for the first time in this study, was 0.17 dm(3)g(-1)s(-1). The obtained k(2) value was compared to that of synthetic antioxidants and natural extracts used in the food industry. Kinetic analysis of PE antiradical effectiveness showed that the k(2) was within the range values for natural colorants of fruit extracts and should be considered as a fast acting natural antioxidant source. The k(2) parameter indicates the extent of oxidation inhibition that is based on all of the kinetic profiles of DPPH bleaching rather than single point measurements. For this reason, the kinetic analysis should become a necessary step for more precise antioxidative characterization of propolis.
PB  - Research Inst Pomology Floriculture, Div Apiculture, Pulawy
T2  - Journal of Apicultural Science
T1  - Kinetic profile of the antioxidant activity of propolis extract: 2,2-diphenyl-1-picrylhydrazyl radical bleaching assay
EP  - 46
IS  - 1
SP  - 39
VL  - 62
DO  - 10.2478/JAS-2018-0004
ER  - 

@article{
author = "Mirković, Snjezana and Rajković, Katarina and Jeremić, Sanja and Gavrilović, Marijana and Tomić, Ljiljana and Arsić-Arsenijević, Valentina and Krstić, Boro",
year = "2018",
abstract = "The objective of this paper was to assess the antiradical effectiveness of propolis extract (PE) based on 2.2-diphenyl-1-picrylhydrazyl radical (DPPH center dot) bleaching assay kinetic profile. The kinetic profile of scavenging DPPH center dot for PE exhibited one kinetic period characterized by one kinetic constant. The second-order rate constant (k(2)) for the oxidation of PE by DPPH center dot, determined for the first time in this study, was 0.17 dm(3)g(-1)s(-1). The obtained k(2) value was compared to that of synthetic antioxidants and natural extracts used in the food industry. Kinetic analysis of PE antiradical effectiveness showed that the k(2) was within the range values for natural colorants of fruit extracts and should be considered as a fast acting natural antioxidant source. The k(2) parameter indicates the extent of oxidation inhibition that is based on all of the kinetic profiles of DPPH bleaching rather than single point measurements. For this reason, the kinetic analysis should become a necessary step for more precise antioxidative characterization of propolis.",
publisher = "Research Inst Pomology Floriculture, Div Apiculture, Pulawy",
journal = "Journal of Apicultural Science",
title = "Kinetic profile of the antioxidant activity of propolis extract: 2,2-diphenyl-1-picrylhydrazyl radical bleaching assay",
pages = "46-39",
number = "1",
volume = "62",
doi = "10.2478/JAS-2018-0004"
}

Mirković, S., Rajković, K., Jeremić, S., Gavrilović, M., Tomić, L., Arsić-Arsenijević, V.,& Krstić, B.. (2018). Kinetic profile of the antioxidant activity of propolis extract: 2,2-diphenyl-1-picrylhydrazyl radical bleaching assay. in Journal of Apicultural Science
Research Inst Pomology Floriculture, Div Apiculture, Pulawy., 62(1), 39-46.
https://doi.org/10.2478/JAS-2018-0004

Mirković S, Rajković K, Jeremić S, Gavrilović M, Tomić L, Arsić-Arsenijević V, Krstić B. Kinetic profile of the antioxidant activity of propolis extract: 2,2-diphenyl-1-picrylhydrazyl radical bleaching assay. in Journal of Apicultural Science. 2018;62(1):39-46.
doi:10.2478/JAS-2018-0004 .

Mirković, Snjezana, Rajković, Katarina, Jeremić, Sanja, Gavrilović, Marijana, Tomić, Ljiljana, Arsić-Arsenijević, Valentina, Krstić, Boro, "Kinetic profile of the antioxidant activity of propolis extract: 2,2-diphenyl-1-picrylhydrazyl radical bleaching assay" in Journal of Apicultural Science, 62, no. 1 (2018):39-46,
https://doi.org/10.2478/JAS-2018-0004 . .

TY  - JOUR
AU  - Rajković, Katarina M.
AU  - Jeremić, Sanja
AU  - Milić, Petar S.
AU  - Kostić, Marina
AU  - Arsić-Arsenijević, Valentina
AU  - Gavrilović, Marijana
AU  - Krstić, Boro
PY  - 2017
UR  - https://imagine.imgge.bg.ac.rs/handle/123456789/1008
AB  - Ultrasound-assisted extraction (US-AE) of total extractive substances from the herb Lady's Bedstraw (Galium verum L.) is useful extraction method for its application in food manufacturing. The effect of different temperatures (T) and solventto-solid ratios (S) on the US-AE extraction yield was studied in this paper. The influence and optimum of the operating parameters (T and S) was investigated using response surface methodology (RSM). The T and S had impact on extraction yield. RSM showed that the optimal extraction parameters, which gave a maximum extraction yield of 18.7%, were T of 40 oC and S of 30 kg kg(-1). Using modeled optimized conditions, detected relative difference between predicted and experimental yield was 3.3 %. RSM successfully predicted optimal parameters and proved as useful tool for standardization of extraction conditions for bioactive components from plants important for food industry.
PB  - Budapest Univ Technology Economics, Budapest
T2  - Periodica Polytechnica-Chemical Engineering
T1  - Optimization of Ultrasound-Assisted Extraction of Total Extractive Substances from Galium verum L
EP  - 205
IS  - 3
SP  - 200
VL  - 61
DO  - 10.3311/PPch.9580
ER  - 

@article{
author = "Rajković, Katarina M. and Jeremić, Sanja and Milić, Petar S. and Kostić, Marina and Arsić-Arsenijević, Valentina and Gavrilović, Marijana and Krstić, Boro",
year = "2017",
abstract = "Ultrasound-assisted extraction (US-AE) of total extractive substances from the herb Lady's Bedstraw (Galium verum L.) is useful extraction method for its application in food manufacturing. The effect of different temperatures (T) and solventto-solid ratios (S) on the US-AE extraction yield was studied in this paper. The influence and optimum of the operating parameters (T and S) was investigated using response surface methodology (RSM). The T and S had impact on extraction yield. RSM showed that the optimal extraction parameters, which gave a maximum extraction yield of 18.7%, were T of 40 oC and S of 30 kg kg(-1). Using modeled optimized conditions, detected relative difference between predicted and experimental yield was 3.3 %. RSM successfully predicted optimal parameters and proved as useful tool for standardization of extraction conditions for bioactive components from plants important for food industry.",
publisher = "Budapest Univ Technology Economics, Budapest",
journal = "Periodica Polytechnica-Chemical Engineering",
title = "Optimization of Ultrasound-Assisted Extraction of Total Extractive Substances from Galium verum L",
pages = "205-200",
number = "3",
volume = "61",
doi = "10.3311/PPch.9580"
}

Rajković, K. M., Jeremić, S., Milić, P. S., Kostić, M., Arsić-Arsenijević, V., Gavrilović, M.,& Krstić, B.. (2017). Optimization of Ultrasound-Assisted Extraction of Total Extractive Substances from Galium verum L. in Periodica Polytechnica-Chemical Engineering
Budapest Univ Technology Economics, Budapest., 61(3), 200-205.
https://doi.org/10.3311/PPch.9580

Rajković KM, Jeremić S, Milić PS, Kostić M, Arsić-Arsenijević V, Gavrilović M, Krstić B. Optimization of Ultrasound-Assisted Extraction of Total Extractive Substances from Galium verum L. in Periodica Polytechnica-Chemical Engineering. 2017;61(3):200-205.
doi:10.3311/PPch.9580 .

Rajković, Katarina M., Jeremić, Sanja, Milić, Petar S., Kostić, Marina, Arsić-Arsenijević, Valentina, Gavrilović, Marijana, Krstić, Boro, "Optimization of Ultrasound-Assisted Extraction of Total Extractive Substances from Galium verum L" in Periodica Polytechnica-Chemical Engineering, 61, no. 3 (2017):200-205,
https://doi.org/10.3311/PPch.9580 . .