分蘖洋葱黄酮体外抗氧化活性研究

Antioxidant Activity of Flavonoids from Tillering Onion in Vitro

以分蘖洋葱黄酮提取物为研究对象,测定其对DPPH自由基、超氧阴离子自由基、羟基自由基、ABTS+自由基、亚硝酸盐自由基的清除能力以及还原能力等指标,研究了其体外抗氧化活性。结果表明:分蘖洋葱黄酮提取物对DPPH自由基、羟基自由基、超氧阴离子自由基、ABTS+自由基、亚硝酸盐自由基具有显著的清除能力,其最大清除率分别为89.35%、76.12%、85.43%、76.26%、72.11%,而且具有较好的还原能力。该研究可为分蘖洋葱资源的开发利用提供依据。

The antioxidant activity of flavone extract from tillering onion in vitro was studied by measuring its scavenging ability and reducing ability of DPPH free radical, superoxide anion free radical, hydroxyl free radical, ABTS+free radical and nitrite free radical. The results showed that the flavone extract from tillering onion had significant scavenging activity on DPPH radical, hydroxyl radical, superoxide anion radical, ABTS+, nitroso radical, with the maximum scavenging rates of 89.35%, 76.12%, 85.43%, 76.26%, 72.11%, respectively, and had good reducing ability. This study can provide a basis for the development and utilization of tillering onion resources.