Evaluation of Extracts from Gevuina avellana Hulls as Antioxidants
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- 作者：André ; s Moure ; Daniel Franco ; Jorge Sineiro ; Herminia Domí ; nguez ; Marí ; a José ; Nú ; ñ ; ez ; and Juan M. Lema
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2000
- 出版时间：September 2000
- 年：2000
- 卷：48
- 期：9
- 页码：3890 - 3897
- 全文大小：104K
- 年卷期：v.48,no.9(September 2000)
- ISSN：1520-5118
文摘
The antioxidant activity of the extracts from Gevuina avellana hulls was evaluated and comparedwith that of BHT (butylated hydroxytoluene) and BHA (butylated hydroxyanisole), using the
-carotene bleaching assay, the accelerated oxidation of crude soybean oil, and the 2,2-diphenyl--picrylhydrazyl (DPPH) radical scavenging method. Solvents of different polarity were used to obtainthe extracts. Both the extraction yield and the antioxidant activity were strongly dependent on thesolvent. The ethanol and diethyl ether soluble fractions were the most active with the -caroteneassay. Ethanol and methanol extracts were the most active in hydrogen radical scavenging activity.Water and methanol inhibited more efficiently the oxidation of soybean oil at 70 and 80 
C,respectively. As a general trend, increased antioxidant activity was observed for increased extractconcentration. Except the acetone extracts, all were stable after 6 months storage at 4 C. Theethanol solubles from G. avellana hulls present antioxidant activity similar to that of syntheticantioxidants and to other reported residual agroindustrial materials.Keywords: Gevuina avellana; hulls; natural antioxidants; polyphenolics; solvent polarity
-carotene bleaching assay, the accelerated oxidation of crude soybean oil, and the 2,2-diphenyl--picrylhydrazyl (DPPH) radical scavenging method. Solvents of different polarity were used to obtainthe extracts. Both the extraction yield and the antioxidant activity were strongly dependent on thesolvent. The ethanol and diethyl ether soluble fractions were the most active with the -caroteneassay. Ethanol and methanol extracts were the most active in hydrogen radical scavenging activity.Water and methanol inhibited more efficiently the oxidation of soybean oil at 70 and 80 C,respectively. As a general trend, increased antioxidant activity was observed for increased extractconcentration. Except the acetone extracts, all were stable after 6 months storage at 4 C. Theethanol solubles from G. avellana hulls present antioxidant activity similar to that of syntheticantioxidants and to other reported residual agroindustrial materials.Keywords: Gevuina avellana; hulls; natural antioxidants; polyphenolics; solvent polarity