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wangjun520

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  本实验从香蕉皮中提取多糖,并研究其体外抗氧化性作用。采用水提法提取香蕉皮多糖,苯酚-硫酸法测定多糖含量以及1,1-二苯代苦味酰基自由基(DPPH)和羟基自由基(·OH)清除法研究香蕉皮多糖的抗氧化性。实验结果得到香蕉皮中多糖的含量为13.65%,160mg/L的多糖样品对DPPH自由基的清除率大约67.%,相当于8.24mg/L的Vc对DPPH自由基的清除率,以及64mg/ml多糖的样品对羟基自由基(·OH)的清除率达51.33%-53.46%,在试验设置的浓度范围内,香蕉皮多糖对羟基自由基(·OH)的清除能力随多糖浓度的增加而增加。香蕉皮中多糖的含量较高并具有一定的抗氧化效果。
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wangjun520: 金币+30, 博学EPI+1 2014-05-16 15:26:06
In the present study, we extract polysaccharides from banana (Musa nana Lour.) and investigate their antioxidant capacities. We extract the polysaccharide by water and determine it content using phenol-sulfuric acid method. In addition the banana polysaccharide scavenging abilities on DPPH and OH free radicals were measured. The results showed that banana peel contained 13.65% polysaccharide. 160mg/l polysaccharide sample scavenged 67% DPPH, equal to 8.24mg/l Vc, and the  scavenging effect of 64mg/ml sample on OH free radicals reached 51.33-53.46%. In the testing  range, the OH scavenging ability increased with the sample concentration rising. There existed much polysaccharide in banana peel with antioxidant abilities.
2楼2014-04-22 18:39:19
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3楼2014-06-23 00:56:00
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