Gamma Radiation Effects on Peanut Skin Antioxidants

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 13, n. 3, p. 3073-3084, MAR 2012.
• Citações Web of Science: 28

Resumo

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)

• Processo FAPESP: 09/18215-8 - Efeitos físico-químicos da radiação gama no amendoim (Arachis hypogaea L.) e a viabilidade de utilização da película como antioxidante natural
• Beneficiário: Solange Guidolin Canniatti Brazaca
• Modalidade de apoio: Auxílio à Pesquisa - Regular