Antioxidant activity of crude polysaccharide, Rusalan, isolated from <i>Russula alatoreticula</i>.

The results are presented in EC50 values (mean ± standard deviation; n = 3) corresponding to 50% of antioxidant activity or 0.5 of absorbance for reducing power assay. BHA was used as standard in superoxide, hydroxyl and DPPH radical scavenging methods. Ascorbic acid was considered as standard in reducing power and total antioxidant capacity assays, while EDTA was adopted as a positive control in chelating ability of ferrous ion method. In each row, different letters mean significant differences between sample and standard (p < 0.05).本研究结果以半最大效应浓度（EC50）值呈现，该值对应抗氧化活性达到50%时的浓度，或是还原力测定中吸光度为0.5时的浓度（数据以平均值±标准差计，n=3）。丁基羟基茴香醚（BHA）被用作超氧阴离子、羟基自由基及DPPH自由基清除实验的标准品；抗坏血酸（Ascorbic acid）作为还原力与总抗氧化能力测定实验的标准品；乙二胺四乙酸（EDTA）则作为亚铁离子螯合能力测定实验的阳性对照。每行中不同字母代表样品与标准品间存在显著性差异（p < 0.05）。