用偏振光测定液体的折射率

在薄膜介质折射率测定的实验中,加入了用偏振光测定液体的折射率的内容,既充实了这个题目的实验内容又使学生加深了对布儒斯特定律的理解,并给出了一种测量液体折射率的新方法。     

三氯化铁催化合成三乙酸甘油酯

采用三氯化铁作催化剂,苯作为带水剂,对乙酸与甘油的酯化反应进行了研究。在最佳反应条件下,该反应可在3h内完成,酯产率达91%以上,该法操作简便,易于工业化生产。     

猪油脂的开发及应用

以猪油资源为原料,通过氢化、水解、皂化、醇解等化学深加工,可以得到硬化油、脂肪酸、脂肪酸单甘酯、甘油、醇酸树脂等化工产品。猪油脂作为可再生资源,综合利用价值高。     

Ethanol-glycerin fixation with thymol conservation: a potential alternative to formaldehyde and phenol embalming

Anatomical fixation and conservation are required to prevent specimens from undergoing autolysis and decomposition. While fixation is the primary arrest of the structures responsible for autolysis and decomposition, conservation preserves the state of fixation. Although commonly used, formaldehyde has been classified as carcinogenic to humans. For this reason, an adequate substitute was developed. Ethanol-glycerin fixation and thymol conservation are described and compared with formaldehyde and phenol in this technical report. The setup, tissue qualities, financial aspects, and health concerns of this method are discussed. Ethanol-glycerin fixation and thymol conservation provide outstanding haptic and optic tissue qualities. Typical formaldehyde and phenol effects, such as skin, airway, and eye irritation, as well as carcinogenic effects, can be circumvented by using ethanol-glycerin and thymol instead. Ethanol-glycerin fixation is more expensive than formaldehyde and requires an explosion-proof facility. However, the absence of health effects and its convincing tissue qualities balance these higher costs. Therefore, ethanol-glycerin fixation and thymol conservation provide a potential alternative and complement established fixation techniques. The use of carcinogenic formaldehyde and toxic phenol can be effectively restricted through the use of the described method.     

间接法合成2,2-二甲氧基丙烷

讨论了以丙酮、丙二醇、甲醇为原料间接法制备二甲氧基丙烷的方法。