Evaluation of antioxidant and antimicrobial properties of finger millet polyphenols (Eleusine coracana)

Viswanath, Varsha and Urooj, Asna and Malleshi, N. G. (2009) Evaluation of antioxidant and antimicrobial properties of finger millet polyphenols (Eleusine coracana). Food Chemistry, 114 (1). pp. 340-346. ISSN 1873-7072

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Official URL: http://doi.org/10.1016/j.foodchem.2008.09.053


Phenolic acids from finger millet (Eleusine coracana) milled fractions (whole flour, seed coat, 3%, 5% and 7%) were isolated and their antioxidant and antimicrobial properties were evaluated. Acidic methanol extracts from seed coat to whole flour were rich in polyphenol content and were found to be stable up to 48 h at pH 4, 7, and 9 as studied by ultraviolet spectroscopy. Diadzene, gallic, coumaric, syringic and vanillic acids were identified as major phenolic acids from the extracted phenolics. Diadzene content was highest in concentration in the 5% flour. The reducing power of seed coat extract was significantly (p < 0.05) higher than that of whole flour extract. Antioxidant activity (AA) as determined by the p-carotene-linoleic acid assay indicated that the AA was highest in seed coat extract (86%), whilst at the same concentration it was only 27% in the whole flour extract. The seed coat extract showed higher antimicrobial activity against Bacillus cereus and Aspergillus flavus compared to whole flour extract. From these observations, it can be inferred that the polyphenols are responsible for the microbial activity of the millet and the results indicate that potential exists to utilise finger millet seed coat as an alternative natural antioxidant and food preservative. (C) 2008 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Finger millet fractions; Polyphenols; Antioxidant; Antimicrobial property
Subjects: B Life Science > Food Science and Nutrition
Divisions: Department of > Food Science and Nutrition
Depositing User: Users 19 not found.
Date Deposited: 26 Aug 2019 09:12
Last Modified: 26 Aug 2019 09:12
URI: http://eprints.uni-mysore.ac.in/id/eprint/7053

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