米糠中γ-谷维醇抗氧化功能与分子结构的关系  

The Relationship Between the Antioxidative Function of γ-Oryzanol and Its Molecular Structure

作　　者：龚院生[1] 姚惠源[1] 

机构地区：[1]江南大学食品学院,江苏无锡214036

出　　处：《无锡轻工大学学报（食品与生物技术）》2002年第5期439-442,451,共5页Journal of Wuxi University of Light Industry

基　　金：国家"十五"科技攻关项目 (2 0 0 1BA5 0 1A0 3)资助课题 .

摘　　要：通过实验和理论分析 ,对γ 谷维醇和其水解产物———阿魏酸、三萜醇的抗氧化特性进行了研究 .γ 谷维醇的抗氧化及清除自由基的能力 ,主要来自于阿魏酸基团 .阿魏酸基团之所以具有抗氧化能力 ,是因为其结构中的酚羟基和共轭体系能够形成较稳定的自由基 ,并阻止自动氧化过程中自由基的链式传递 ,从而表现出抗氧化功能 .The antioxidative properties of γ oryzanol and its hydrolysates, i.e. ferulic acid and triterpene alcohol, were studied through experiments and theoretical analysis. The antioxidative properties and radical scavenging activity of γ oryzanol were attributed to its ferulic acid residue. Ferulic acid includes a phenol hydroxyl group and a stable conjugated system, which increases stability of radical. That is why γ Oryzanol can stop the chain transporting of radical in the autoxidation process. Therefore, it is a good chain breaking antioxidant.

关 键 词：米糠 Γ-谷维醇 抗氧化功能 分子结构 清除自由基 

分 类 号：Q946[生物学—植物学]