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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.)

Gamma Radiation Effects on Peanut Skin Antioxidants

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Author(s):
de Camargo, Adriano Costa [1] ; Ferreira de Souza Vieira, Thais Maria [2] ; Bismara Regitano-D'Arce, Marisa Aparecida [2] ; Calori-Domingues, Maria Antonia [2] ; Canniatti-Brazaca, Solange Guidolin [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo CENA USP, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ USP, Dept Agri Food Ind Food & Nutr, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 13, n. 3, p. 3073-3084, MAR 2012.
Web of Science Citations: 28
Abstract

Peanut skin, which is removed in the peanut blanching process, is rich in bioactive compounds with antioxidant properties. The aims of this study were to measure bioactive compounds in peanut skins and evaluate the effect of gamma radiation on their antioxidant activity. Peanut skin samples were treated with 0.0, 5.0, 7.5, or 10.0 kGy gamma rays. Total phenolics, condensed tannins, total flavonoids, and antioxidant activity were evaluated. Extracts obtained from the peanut skins were added to refined-bleached-deodorized (RBD) soybean oil. The oxidative stability of the oil samples was determined using the Oil Stability Index method and compared to a control and synthetic antioxidants (100 mg/kg BHT and 200 mg/kg TBHQ). Gamma radiation changed total phenolic content, total condensed tannins, total flavonoid content, and the antioxidant activity. All extracts, gamma irradiated or not, presented increasing induction period (h), measured by the Oil Stability Index method, when compared with the control. Antioxidant activity of the peanut skins was higher than BHT. The present study confirmed that gamma radiation did not affect the peanut skin extracts' antioxidative properties when added to soybean oil. (AU)

FAPESP's process: 09/18215-8 - Physico-chemical effects of gamma radiation on peanut (Arachis hypogaea L.) and the feasibility of the use of its skin as natural antioxidant
Grantee:Solange Guidolin Canniatti Brazaca
Support Opportunities: Regular Research Grants