银杏叶的研究进展
摘要：近年来，国内外对银杏叶提取物的成分进行了深入的研究报导,银杏叶提取物的有效成分有黄酮，银杏内脂，有机酸，聚戊烯醇等。本文论述了它们的药理作用以及对银杏叶不同活性成分的不同提取分离纯化方法进行讨论和分析，以此为银杏叶资源的研究提供理论依据。
关键词：银杏叶；有效成分；提取工艺；分离纯化；药理作用
Abstract：In recent years, the scientists from both at home and abroad have alone done researches and reports on the composition of Extract of Ginkgo bilobainn a deep way,The active constituents of EGB are flavone,bilobalide,organic,polyprenols and so on.Both the pharmacological action of EGB and the different methods to the extracting ,separating and punfing the different active ingredients of Ginkgo biloba leaves are practically discussed in this article with the construction.To provide theoretical basis for the study on the resource of Ginkgo bilobaleaves with the conclusion above.
Key words：Ginkgo biloba；active ingredients ；extraction process；
isolation and purification ；pharmacological effects.
银杏树又称白果树，公孙树，属银杏科，是当今地球上最古老的书中之一，被称为活化石。银杏叶为银杏的干燥叶，味苦，涩，性平，具有益心敛肺、化湿止泻等功效。《中药志》记载它能敛肺气，平喘咳，止带浊。现代药理研究表明，银杏叶对人体的作用比较广泛，如改善心血管及周围血管，心绞痛[1]，动脉硬化，高血压和促进记忆力、改善老年痴呆[2]和保护人体内皮血管的作用[3]。
