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| 本實驗從香蕉皮中提取多糖,并研究其體外抗氧化性作用。采用水提法提取香蕉皮多糖,苯酚-硫酸法測定多糖含量以及1,1-二苯代苦味;杂苫(DPPH)和羥基自由基(·OH)清除法研究香蕉皮多糖的抗氧化性。實驗結(jié)果得到香蕉皮中多糖的含量為13.65%,160mg/L的多糖樣品對DPPH自由基的清除率大約67.%,相當于8.24mg/L的Vc對DPPH自由基的清除率,以及64mg/ml多糖的樣品對羥基自由基(·OH)的清除率達51.33%-53.46%,在試驗設置的濃度范圍內(nèi),香蕉皮多糖對羥基自由基(·OH)的清除能力隨多糖濃度的增加而增加。香蕉皮中多糖的含量較高并具有一定的抗氧化效果。 |

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| 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. |
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