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[求助]
高悬赏求翻译(天然产物方面），毕业论文汉译英，急
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摘要：【目的】利用实验室所分离出的小叶女贞枝叶部粗提产物进行黄嘌呤氧化酶活性抑制作用实验，提取分离其中的黄酮类化合物作初步的定性测定。为进一步探究小叶女贞在抗衰老等作用方面奠定基础【方法】通过煎煮法和柱层析的方法提取分离出小叶女贞中的粗提产物，对其进行黄嘌呤氧化酶活性抑制实验，之后通过干柱层析法分离粗提产物中的各个组分，最后利用黄酮类化合物的显色反应对产物中的黄酮类化合物进行定性分析。【结果】小叶女贞枝叶部初提产物对黄嘌呤氧化酶活性的抑制效果不够明显，对其进一步提取分离得到六种产物，通过显色反映鉴定出其中两种产物属于黄酮类化合物。【结论】小叶女贞枝叶部粗提产物作为黄嘌呤氧化酶活性抑制剂的开发前景不大，但可在DPPH自由基清除率、羟基自由基清除率以及超氧阴离子清除率进行进一步的研究,以期在小叶女贞枝抗氧化作用方面取得新的收获。 [ Last edited by an777 on 2011-4-28 at 13:44 ] |
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an777(金币+200, 翻译EPI+1): 万分感谢 2011-04-28 14:15:11
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Abstract Purpose: Crude extracts from leaves and stems of Ligustrum quihoui Carr. were subjected to analyze their inhibition effect on xanthine oxidase, and flavones were used to conduct primary qualitative research. Our work lays foundation for anti-aging research of Ligustrum quihoui Carr. Method: Crude extracts of Ligustrum quihoui Carr. were obtained by boil and chromatography. Flavones components from crude extracts were tested for their inhibitory effect on xanthine oxidase. Dry-column chromatography was performed to separate each fraction of crude extracts. In the end flavones chromogenic reaction was carried out to characterize flavones qualitatively. Result: Inhibitory effect of crude extracts from leaves and stems of Ligustrum quihoui Carr. on Xanthine oxidase was not obvious enough. Total six compounds were obtained from further isolation, of which two are characterized to be flavone through chromogenic reaction. Conclusion: It doesn’t seem optimistic to develop crude extracts from leaves and stems of Ligustrum quihoui Carr. into inhibition ingredient on xanthine oxidase. Further research work might be elimination of free radicals DPPH, hydroxyl radicals and superoxide anion with our progress. It is expected crude extracts from leaves and stems of Ligustrum quihoui Carr. might play a rule in anti-oxidation. |
2楼2011-04-28 14:08:26
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