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Kinetic Profile of the Antioxidant Activity of Propolis Extract: 2,2-Diphenyl-1-Picrylhydrazyl Radical Bleaching Assay Cover

Kinetic Profile of the Antioxidant Activity of Propolis Extract: 2,2-Diphenyl-1-Picrylhydrazyl Radical Bleaching Assay

Open Access
|Jun 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) bleaching assay kinetic profile. The kinetic profile of scavenging DPPH for PE exhibited one kinetic period characterized by one kinetic constant. The second-order rate constant (k2) for the oxidation of PE by DPPH, determined for the first time in this study, was 0.17 dm3g−1s−1. The obtained k2 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 k2 was within the range values for natural colorants of fruit extracts and should be considered as a fast acting natural antioxidant source. The k2 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.

DOI: https://doi.org/10.2478/jas-2018-0004 | Journal eISSN: 2299-4831 | Journal ISSN: 1643-4439
Language: English
Page range: 39 - 46
Submitted on: Aug 21, 2017
Accepted on: Dec 1, 2017
Published on: Jun 21, 2018
Published by: Research Institute of Horticulture
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year

© 2018 Snježana Mirković, Katarina Rajković, Sanja Jeremić, Marijana Gavrilović, Ljiljana Tomić, Valentina Arsić Arsenijević, Boro Krstić, published by Research Institute of Horticulture
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.