摘要
以人字草为原料,对其中的黄酮、多糖、氨基酸和多酚等功能性成分进行提取,并对其抗氧化活性进行研究。结果表明:人字草中含有丰富的黄酮和多糖物质,其含量分别为22.58、11.58mg/g(以干基计),多酚和氨基酸含量较少,分别为3.04、0.518mg/g。抗氧化实验表明:人字草黄酮、多糖、氨基酸和多酚具有较强清除自由基的能力,对DPPH自由基的半抑制浓度IC50分别为24.87、29.07、0.46、48.73μg/mL,对·OH的半抑制浓度IC50分别为5.35、7.2、0.08、125.41μg/mL。
The extraction of flavonoids,polysaccharides,amino acids and polyphenols from Kummerowia Striata were carried out,and their antioxidant activities were evaluated.The results indicated that there was a large amount of flavonoids and polysaccharides,which contents were 22.58 and 11.58mg /g. The contents of polyphenols and amino acids were less,which were 3.04 and 0.518mg /g,respectively. Moreover,antioxidant experiments showed that flavonoids,polysaccharides,amino acids and polyphenols from Kummerowia Striata had strong scavenging abilities for free radicals.Their IC 50 for DPPH· were 24.87,29.07 0.46,and 48.73 μg /mL,respectively.And their IC 50 for ·OH free radical were 5.35,7.2,0.08,and 125.41 μg /mL,respectively.
出处
《食品工业科技》
CAS
CSCD
北大核心
2013年第3期128-131,共4页
Science and Technology of Food Industry
关键词
人字草
黄酮
多糖
氨基酸
多酚
抗氧化活性
Kummerowia Striata
flavonoids
polysaccharides
amino acids
polyphenols
antioxidant activity
