Effect of boiling on bioactive compounds and radical scavenging activity of anthocyanin-rich vegetables: Red amaranth and red skin potato
1 Department of Food Engineering and Tea Technology, School of Applied Sciences and Technology, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh.
2 Department of Advanced Food Science and Technology, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Japan.
Research Article
GSC Biological and Pharmaceutical Sciences, 2019, 07(02), 127–137.
Article DOI: 10.30574/gscbps.2019.7.2.0085
Publication history:
Received on 07 May 2019; revised on 20 May 2019; accepted on 24 May 2019
Abstract:
This study was conducted to determine the optimum boiling time resulting in maximum retention of the bioactive compounds and radical scavenging activity. For this analysis, two most commonly consumed anthocyanin-rich vegetables , red amaranth (Amaranthus tricolor) and red skin potato (Solanum tuberosum) were exposed to boiling for 0, 1, 5, 10, and 20 minutes. Then the effects of boiling times on physicochemical, bioactive compounds, and antioxidant activity by DPPH radical scavenging ability were analyzed. In physicochemical analysis, ash content was decreased significantly, and the pH value increased significantly as the boiling time increased (p<0.05). The % of WSI was increased significantly as the boiling time for red amaranth as well as red skin potato (p<0.05) increased. The total polyphenol content (TPC), total anthocyanin content (TAC), total carotenoid content (TCC), and radical scavenging activity (RSA) of red amaranth and red skin potatoes were gradually reduced with the increasing of boiling time. The first - order kinetic model showed the good fit for the loss of total phenolic, carotenoids, anthocyanin, and DPPH radical scavenging activity of red amaranth and red skin potatoes with 0.86 - 0.98 coefficient of determination (R2). The findings could encourage both the household boiling and the food industry to recommend specific boiling time to maintain vegetables' antioxidant properties.
Keywords:
Antioxidant; D-value; Rate of loss; Red amaranth; Red skin potato
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Copyright © 2019 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
