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作 者:杨小兰[1] 田艳花[1] 师成滨[1] 郑海鹰[1] 张晓云[2]
机构地区:[1]山西大学生命科学与技术学院,山西太原030006 [2]山西医科大学第一医院,山西太原030001
出 处:《食品科学》2006年第10期297-302,共6页Food Science
基 金:山西省自然科学基金资助项目(2006011019)
摘 要:通过单因素和正交试验确定了酒花多酚的最佳提取工艺:浸提剂为70%丙酮,料液比1:25(g/ml),回流提取温度45℃,提取时间为1h,在此条件下多酚的提取量达到47.29mg/g干酒花。抗氧化实验结果显示酒花多酚对DPPH自由基的清除能力(IC506.72μg/ml)优于抗坏血酸(IC508.79μg/ml)和单宁酸(IC507.68μg/ml),弱于茶多酚(IC505.77μg/ml);酒花多酚的还原力(EC500.111mg/ml)与抗坏血酸(EC500.101mg/ml)接近,弱于单宁酸(EC500.079mg/ml)和茶多酚(EC500.072mg/ml);酒花多酚对小鼠肝匀浆脂质过氧化产生丙二醛(MDA)的抑制能力(IC500.179mg/ml)优于单宁酸(IC500.462mg/ml),弱于茶多酚(IC500.136mg/ml)。Confirm the optimum extraction technics of polyphenol of Humulus lupulus by single factor and orthogonal test: impregnant' s (acetone) concentration 70%, the ratio of materiel and impregnant 1:25(g/ml), circumfluence temperature 45℃, time lh and extraction quantity achieve 47.29mg/g dry Humulus lupulus at this condition. The results of anti-oxidative test showed that the polyphenol extracts from Humulus Lupulus has stronger scavenging effects on [DPPH]freedom radical (IC506.72μg/ml) than ascorbic acid (IC50 8.79μg/ml) and tannic acid (IC50 7.68μg/ml), weaker than tea polyphenols (IC80 5.77μg/ml); it has nearly reducing capacity (EC50 0.111mg/ml) as ascorbic acid (EC50 0.101mg/ml), weaker than tannic acid (EC50 0.079mg/ml) and tea polyphenols (EC50 0.072); it also has stronger inhibition effect on MDA produced by lipid-peroxidation in liver homogenate of small rat (IC50 0.179mg/ml)than tannic acid (IG50 0.462mg/ml), weaker than tea polyphenols (IC50 0.136mg/ml).
关 键 词:酒花多酚 提取工艺 DPPH自由基 还原力 脂质过氧化
分 类 号:TS218[轻工技术与工程—粮食、油脂及植物蛋白工程]
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