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投稿时间：2020-01-17
投稿时间：2020-01-17
中文摘要: 采用超声波辅助提取技术从杨桃果肉中提取多酚，以抗坏血酸为阳性对照，从总抗氧化能力、羟自由基清除能力、DPPH自由基清除能力和油脂过氧化抑制能力4个方面，探究杨桃多酚提取液的体外抗氧化活性。结果表明：5.2 mg/mL杨桃多酚提取液总抗氧化能力的铁离子还原能力（ferric reducing antioxidant power，FRAP）值为72 103.5 μmol/mL。杨桃多酚提取液能有效地清除羟自由基和DPPH自由基，其中羟自由基清除率最高可达90%以上，DPPH自由基清除率最高可达80%以上，并且能够一定程度抑制花生油过氧化物的生成。总体来看，杨桃多酚提取液具有较好的总抗氧化能力、清除羟自由基和DPPH自由基能力，并对抑制花生油中过氧化物的生成具有一定效果。
Abstract:With ascorbic acid as positive control，the total antioxidative ability（T-AOC），scavenging activities of hydroxyl and DPPH radicals，and the inhibitive ability of lipid peroxidation were investigated to study the in vitro antioxidant activity of polyphenols solution extracted from carambola by ultrasonic assisted extraction technology.The results showed that the ferric reducing antioxidant power（FRAP）value of the total antioxidant capacity of 5.2 mg/mL carambola polyphenols extracting solution was 72 103.5 μmol/mL.Hydroxyl and DPPH radicals could be effectively scavenged by carambola polyphenols extract，and the highest scavenging rates of hydroxyl and DPPH radicals reached 90%and 80% ，respectively，and could inhibit the peroxides generation in peanut oil to some extent.In general，carambola polyphenols extract had good total antioxidant activity，hydroxyl and DPPH radicals scavenging activity and certain peroxides generation inhibition capability.
文章编号：202024009 中图分类号： 文献标志码：
基金项目:岭南师范学院自然科学研究青年项目（QL1504）
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