Journal ArticleDOI
Evaluation of the antioxidant properties of free and bound phenolic acids from native and malted finger millet (ragi, Eleusine coracana Indaf-15).
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TLDR
The antioxidant capacity of phenolic acids changes during the malting of ragi, and the antioxidant activity of a free phenolic acid mixture was found to be higher compared to that of a bound phenolic Acid mixture.Abstract:
Free and bound phenolic acids were isolated from native and malted finger millet (ragi, Eleusine coracana Indaf-15), and their antioxidant properties were evaluated. Protocatechuic, gallic, and caffeic acids were found to be the major free phenolic acids. A 3-fold decrease was observed in protocatechuic acid content, whereas the decrease was marginal in the case of caffeic acid upon 96 h of malting. However, the contents of other free phenolic acids such as gallic, vanillic, coumaric, and ferulic acids increased. Ferulic, caffeic, and coumaric acids were found to be the major bound phenolic acids, and a 2-fold decrease was observed in their contents upon 96 h of malting. The antioxidant activity of a free phenolic acid mixture was found to be higher compared to that of a bound phenolic acid mixture. An increase in antioxidant activity coefficient was observed in the case of free phenolic acids from 770.0 +/- 7.8 to 1686.0 +/- 16.0, whereas the same was decreased from 570.0 +/- 6.0 to 448.0 +/- 4.5 in bound phenolic acids upon 96 h of malting. Therefore, the antioxidant capacity of phenolic acids changes during the malting of ragi.read more
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Comparison of the Antioxidative Activity of Some Acid-phenols: Structure-Activity Relationship
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Occurrence and nature of ferulic acid substitution of cell-wall polysaccharides in graminaceous plants
M.Meryl Smith,Roy D. Hartley +1 more
TL;DR: In this article, the cell walls of wheat bran were treated with Oxyporus "cellulase" (a mixture of polysaccharide hydrolases) in order to release compounds containing ferulic acid bound to carbohydrate.
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A rapid method for evaluation of antioxidants
TL;DR: In this paper, a rapid, sensitive method for evaluating antioxidants is described based on minimizing β-carotene loss in an emulsified, aqueous, coupled oxidation of linoleic acid and β-Carotene.
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Detection of bound ferulic acid in cell walls of the Gramineae by ultraviolet fluorescence microscopy
Philip J. Harris,Roy D. Hartley +1 more
TL;DR: In this paper, it has been shown that in cell walls of Lolium multifiorum Lam, which contain ferulic acid and a small amount of p-coumaric acid mainly as their trans isomers, the acids are esterified at their carboxyl groups to polysaccharides.