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genhunter

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翻译EPI: 387
应助: 259 (大学生)
金币: 9757.4
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帖子: 2484
在线: 1793小时
虫号: 2558361
注册: 2013-07-22
专业: 肿瘤化学药物治疗

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fcykd321: 金币+5, 翻译EPI+1, ★★★很有帮助 2015-05-15 09:33:41

Abstract: The triterpenoids present in loquat (Eriobotrya japonica) leafs are mainly consist of ursolic acid, oleanolic acid, corosolic acid, maslinic acid and a variety of other active substances, are of high medicinal value. We optimize the extraction process of triterpene acids from loquat leafs. Using triterpenoid acid as an indicator, the ethanol concentration, solvent volume, extraction time and the number of extractions were studied by the orthogonal test method. We found that extracting loquat leafs with 10 volumes of 80% ethanol for 3 times, each lasted for 3h, resulted in high extraction rate. This process allows high extraction rates for the active ingredients with good reproducibility, simplicity and feasibility.
Keywords; loquat leaf; triterpenoid acid; extraction processing; orthogonal design; UV & VIS spectrophotometer

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