二氢杨梅素对4种植物油脂抗氧化作用研究

研究二氢杨梅素(DMY)对植物油脂抗氧化作用。采用紫外可见分光光度计和烘箱强化贮藏法,考察DMY对DPPH自由基清除能力和对山茶油、亚麻籽油、紫苏籽油和油酸的抗氧化作用。结果表明:DMY对DPPH自由基清除能力明显高于TBHQ、BHT、BHA和TP;当抗氧化剂添加量为0.05%时,不同抗氧化剂在山茶油和油酸中抗氧化作用强弱顺序为TBHQDMYBHABHTTP;不同抗氧化剂在紫苏籽油和亚麻籽油中抗氧化作用强弱顺序为TBHQBHABHTDMYTP;DMY还能协助增强其他抗氧化剂的作用;DMY对4种植物油脂抗氧化效果强弱顺序为山茶油油酸亚麻籽油紫苏籽油。

Antioxidant effects of dihydromyricetin on four plant oils

Antioxidant effects of dihydromyricetin(DMY) on plant oils were investigated.Scavenging activity on DPPH free radical and the antioxidant activity on oil-tea camellia seed oil, linseed oil, perilla seed oil and oleic acid were evaluated by UV-visible spectrophotometry and oven strengthen storage. The results showed that the scavenging activity of DMY on DPPH free radical was significantly higher than TBHQ,BHT,BHA and TP. When the antioxidant dosage was 0.05%, the antioxidant activities of TBHQ in oil-tea camellia seed oil and oleic acid were the strongest, followed by DMY, BHA, BHT and TP, and the antioxidant activities of TBHQ in perilla seed oil and linseed oil were the strongest, followed by BHA, BHT, DMY and TP. Morever, DMY could help to enhance the role of other antioxidants. The antioxidant effect of DMY on oil-tea camellia seed oil was the best, followed by oleic acid, linseed oil and perilla seed oil.