UPM Institutional Repository

Effects of roasting on phenolics composition and antioxidant activity of peanut (Arachis hypogaea L.) kernel flour.


Citation

Mar, Mar Win and Abdul Hamid, Azizah and Sham Baharin, Badlishah and Saari, Nazamid (2011) Effects of roasting on phenolics composition and antioxidant activity of peanut (Arachis hypogaea L.) kernel flour. European Food Research and Technology, 233 (4). pp. 599-608. ISSN 1438-2377

Abstract

The effects of roasting on the phenolics composition and antioxidant activity of peanut (Arachis hypogaea L.) kernel flour were appraised. Peanut kernel flour, with and without skin, were roasted at 160 °C for 10, 20, 30, 40 and 50 min. The resultant changes in the antioxidant activity of roasted peanut kernel flour were assessed by the determinations of total phenolics, 1,1-diphenyl-2-picrylhydrazyl free radical-scavenging capacity, percent inhibition of linoleic acid oxidation and thiobarbituric acid test and compared with those of unroasted kernel flour. It was observed that roasting significantly (p < 0.05) increased the antioxidant activity of the peanut kernel flour. HPLC analysis revealed the detection of three phenolic acids (p-hydroxybenzoic, chlorogenic, p-coumaric), two flavonols (quercetin, kaempferol), and a stilbene (resveratrol) both in the roasted and unroasted samples. In peanut kernel flour without skin, the contents of the phenolics increased in the initial roasting phase, however, decreased gradually in the later phase (>20 min of roasting time). In contrast, over the course of heating, the amounts of phenolics were noted to be slightly increased in the peanut kernel flour with skin; the most significant (p < 0.05) increase occurred in the concentration of p-coumaric acid and quercetin at 30, 40, and 50 min of roasting. The results of this study reveal that optimum roasting time should be sought to enhancing the antioxidant capacity and phenolics concentration in peanut kernel flour.


Download File

[img]
Preview
PDF (Abstract)
Effects of roasting on phenolics composition and antioxidant activity of peanut.pdf

Download (84kB) | Preview
Official URL: http://link.springer.com

Additional Metadata

Item Type: Article
Divisions: Faculty of Food Science and Technology
DOI Number: https://doi.org/10.1007/s00217-011-1544-3
Publisher: Springer Link
Keywords: Peanut kernel; Roasting time; TPC; Colorimetric antioxidant assays; Phenolics acids; Flavonols.
Depositing User: Nur Farahin Ramli
Date Deposited: 10 Oct 2013 08:09
Last Modified: 16 Oct 2015 08:59
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s00217-011-1544-3
URI: http://psasir.upm.edu.my/id/eprint/24180
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item