广宁红花茶油清除自由基能力

Free radical scavenging ability of Camellia semiserrata seed oil

为了研究广宁红花茶油清除自由基的能力,分别以不同浓度的红花毛油和半精炼红花茶油来测定DPPH、ABTS^+·和羟基自由基清除率,以比较不同精炼程度茶油的抗氧化活性.试验结果表明,广宁红花茶油具有较明显的清除自由基活性,红花毛油和半精炼红花茶油清除自由基的能力均随浓度的增加而增强;当试验浓度为10 g/L时,红花毛油和半精炼红花茶油对DPPH清除率分别为23.46%、10.98%,对ABTS+·清除率分别为17.39%、11.45%;而试验浓度为2.5 g/L时,对羟基自由基清除率已分别达到26.39%、19.06%,结果表明对3种自由基的清除能力红花毛油强于半精炼红花茶油,其中对羟基自由基清除能力最强.

In order to study the ability of Camellia semiserrata seed oil to scavenge free radicals,the DPPH,ABTS+·and hydroxyl radical scavenging rates were determined by different concentrations of the raw safflower oil and semi-refined safflower oil,respectively,to compare the antioxidant activity of tea oil with different refining degrees.The results showed that the scavenging effects on free radicals of safflower oil was distinctly.The scavenging rate of free radicals increased with the concentration of oil.When the test concentration was 10 g/L,the DPPH scavenging rates of the raw safflower oil and semi-refined safflower oil were 23.46%and 10.98%,respectively,and the ABTS^+·scavenging rates were 17.39%and 11.45%,respectively.When the test concentration was 2.5 g/L,the scavenging rate of hydroxyl free radicals reached 26.39%and 19.06%,respectively.The results show that the scavenging ability of raw safflower oil to three free radicals was stronger than that of semi-refined safflower oil,with the greatest ability to scavenge the hydroxyl free radical.