黄色和紫色百香果籽油抗氧化作用的对比研究

本论文对比分析了两种百香果籽油中的抗氧化物质含量。两种百香果籽油中均含有黄酮、β-胡萝卜素和维生素E,其中黄酮含量最高,达到45μg/m L左右,黄色百香果籽油和紫色百香果籽油的总酚含量分别达到16.69、15.82 mg GAE/kg。比较分析了两种百香果籽油对铁离子的还原能力和对DPPH自由基、超氧阴离子自由基（O-2·）和羟自由基（·OH）的清除效果等的抗氧化作用,结果紫色百香果籽油的铁离子还原能力和清除DPPH自由基的能力强于黄色百香果籽油,而清除羟自由基和超氧阴离子能力则相反,两种百香果籽油对DPPH自由基的最高清除率都高于84%,对超氧阴离子自由基的最高清除率都超过80%。实验结果表明两种百香果籽油均具有较强的抗氧化活性。 

A comparative study on antioxidant properties of yellow and purple passion fruit seed oil

Antioxidants of yellow and purple passion fruit seed oil were analyzed.Two kinds of passion fruit seed oil contained flavonoids,β-carotene and vitamin E and the highest one were flavonoids,for about 45 μg/m L. Total phenol content of yellow passion fruit seed oil and purple passion fruit seed oil were 16.69,15.82 mg GAE/kg,respectively.The antioxidant activities of two kinds of passion fruit seed oil were compared by measuring the iron reduction capability and the scavenging rates of DPPH·,O-2· and ·OH.The ability of reducing ferric and scavenging DPPH·of purple passion fruit seed oil was stronger than the yellow one,while the ability of scavenging O-2·and ·OH was opposite.The highest scavenging ability of two kinds of passion fruit seed oil for DPPH· were more than 84%,for O-2·were higher than 80%.This research revealed that two kinds of passion fruit seed oil had strong antioxidant activity.