建立了一种测定白桦树皮中白桦脂醇对羟自由基清除率的新方法。
A new method of determining the antioxidant activity of betulin from betula bark is established.
实验结果表明，超声波法可以提高山苍子油的得率，此外山苍子粗油具有较好的抗氧化作用，可以有效的清除羟自由基、超氧自由基。
The result was as the following: the extracting rate of Litsea Cubeba oil was enhanced by ultrasonic, Litsea Cubeba oil has a great effect on the elimination of free radical.
不同水解度的蛋白多肽清除羟自由基能力不同，结果表明水解度5%时，自由基清除率最高可达50.90%。
The different DH of walnuts peptides has different ability to scavenge hydroxyl radicals. The results showed that when DH is 5% the scavenging activity is 50.90%.
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