本实验观察银杏叶单黄酮山紊酚，谢皮系等对血管紧转换酶（＊＊E）的抑制率及半数抑制浓度（1＊50），现将结果报告如下．1材料与方法①单黄酮购于沈阳药学院；③＊＊E试剂盒购于｝海医大第一附属医院．①＊＊E，本院正常人血清．仪器：北京＊H8000。紫外分光光度计．方法：比 This experiment was conducted to observe the inhibitory rate and half-inhibitory concentration (1*50) of ginkgo flavonoids, flavone palmitoylphenol, and chaperones on vascular tight-conversion enzymes (**E). The results are reported below. 1Materials and methods 1 Mono-flavonoids were purchased from Shenyang Pharmaceutical University; 3**E kits were purchased from Haiyi Das First Affiliated Hospital. 1**E, normal human serum in our hospital. Instrument: Beijing*H8000. UV spectrophotometer. Method: than