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chenyong1302金虫 (小有名气)
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英译汉 一段英文摘要
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The antioxidative properties of a hot water extract of the leaves of Mallotus japonicus were evaluated. The extract had a high phenolic content and strong antioxidative activity, compared with green tea, rooibos tea, and red wine. Six phenolic compounds were isolated as antioxidative components by HPLC. They were identified as mallotinic acid, mallotusinic acid, corilagin, geraniin, rutin, and ellagic acid. These antioxidative compounds were subjected to DPPH radical-scavenging, superoxide radical-scavenging, and hydroxyl radical-scavenging assays, and compared with other antioxidative compounds. Four of the compounds, mallotinic acid, mallotusinic acid, corilagin and geraniin, exhibited much stronger antioxidative activity than gallic acid, rutin, ellagic acid, quercetin, and chlorogenic acid, and were as active as epigallocatechin gallate (EGCG), a strong antioxidant in green tea. Mallotus japonicus leaves are an excellent source of strong natural antioxidative materials. лл |
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hero0423
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chenyong1302(金币+6,VIP+0):谢谢 4-7 02:09
chenyong1302(金币+6,VIP+0):谢谢 4-7 02:09
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(本文对)野梧桐(Mallotus japonicus)叶子的热水提取物的抗氧化活性进行了评价分析。与绿茶，南非红叶茶及红葡萄酒相比，该提取物中有较高含量酚类物质且表现出较强的抗氧化性。使用高效液相色谱共分离出六种具抗氧化性的酚类化合物。它们分别是野桐酸(mallotinic acid)，野桐鞣酸(mallotusinic acid)，鞣云实精(corilagin)，老鹳草鞣质(geraniin)，芸香苷(rutin)和鞣花酸(ellagic acid)。运用DPPH自由基清除法，过氧化物自由基清除法，羟基自由基清除法研究了以上这些化合物，并合其他的抗氧化化合物进行了比较。研究表明，其中的四种化合物，野桐酸(mallotinic acid)，野桐鞣酸(mallotusinic acid)，鞣云实精(corilagin)，老鹳草鞣质(geraniin)显示出比没食子酸(gallic acid), 芸香苷(rutin), 鞣花酸(ellagic acid), 栎精(quercetin), and 绿原酸(chlorogenic acid)更强的抗氧化性，同绿茶里的强抗氧化物表没食子儿茶素没食子酸酯EGCG ( Epigallocatechin gallate )一样强。野梧桐叶子确实是天然强抗氧化物的一个不错来源。 [ Last edited by hero0423 on 2009-4-7 at 01:43 ] |
2楼2009-04-07 01:41:44