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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Extraction yield, antioxidant activity andphenolics from grape, mango and peanut agro-industrial by-products

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Author(s):
Braga, Gilberto Costa ; Melo, Priscilla Siqueira ; Bergamaschi, Keityane Boone ; Tiveron, Ana Paula ; Massarioli, Adna Prado ; De Alencar, Severino Matias
Total Authors: 6
Document type: Journal article
Source: Ciência Rural; v. 46, n. 8, p. 1498-1504, AUG 2016.
Web of Science Citations: 5
Abstract

The objective of this study was to determine and correlate the extraction yields, antioxidant activity, total phenolics and total flavonoids from grape, mango and peanut agro-industrial by-products. The beta-carotene/linoleic acid autoxidation system and scavenging capacity for DPPH and ABTS free radicals assays were used. The results were expressed in terms of lyophilized sample or dry extract. Mango bagasse exhibited the highest extraction yield (37.07%) followed by peanut skin (15.17%) and grape marc (7.92%). In terms of lyophilized sample, total phenolics did not vary significantly among the residues evaluated (average of 60.33mg EAG g(-1)); however, when they were expressed as dry extract grape marc exhibited the highest total phenolic (768.56 +/- 116.35mg GAE g(-1)), followed by peanut skin (404.40 +/- 13.22mg GAE g(-1)) and mango bagasse (160.25 +/- 4.52mg GAE g(-1)), Peanut skin exhibited the highest content of total flavonoids (2.44mg QE g(-1)), while grape marc (1.76mg QE g(-1)) and mango bagasse (1.70 mg QE g(-1)) showed no significant differences. The extraction yield showed strong negative linear correlation with total phenolic and total flavonoid. This study showed that peanut skin was the sample with the highest antioxidant activity and it was strongly influenced by total flavonoids. All extracts of byproducts showed antioxidant activity comparable to a-tocopherol, and they can be a source of natural compounds with potential to replace synthetic antioxidants such as BHT. (AU)

FAPESP's process: 11/12640-9 - Identification of natural antioxidants in agro-industrial residues: isolation and technological application in lipid-based food matrix
Grantee:Priscilla Siqueira Melo
Support type: Scholarships in Brazil - Doctorate