Effects of surfactant on viscosity of cetyl hydroxyethylcellulose ( CHEC ) solution were investigated by rheometer.通过流变仪研究了几种表面活性剂对十六烷基羟乙基纤维素 ( CHEC ) 溶液黏度的影响....
目的介绍腱膜性上睑下垂及其手术矫正的疗效.Objective To introduce the aponeurotic ptosis and its surgical correcting efficacy.做牙科手术和矫正的牙医年平均收入超过了30万美元.Dental surgeons and orthodontists average more than $ 300, 000 annually.手术矫正的一侧鼓膜.Surgical ...
Result: In optimal conditions, the yield of n - butyl gallate was over 93.8 %.结果: 在最佳实验条件下没食子酸正丁酯收率达93.8%.Iso - army gallate was synthesized by esterification of gallic acid with iso - army alcohol catalyzed by 4 - methy...