卞孝萱先生治学历程

卞孝萱先生是自学成家的知名学者。起初业余钻研近代史。到范文澜先生身边工作后，专攻古代文史。之年，除坚持自己的科研外，还带领同志从事规模宏大的文化积累工程。     

如何在语文教学中培养学生的作文灵感

作文教学是语文教学的重要组成部分,它更能张扬学生的个性,激发学生的创造力。灵感是在创造性思维活动中创造新形象时思维受到某种外来信息的刺激或诱惑而产生的突发性意念。在语文教学中要从兴趣的培养、知识的积累、习惯的养成、情境的设置四个方面进行引导,这样才能诱发学生的写作潜能,激发学生的作文灵感。     

Bunte盐法制备巯基乙酸实验合成新方法

采用氯乙酸和碳酸钠反应生成氯乙酸钠,控制氯乙酸钠溶液PH值为8～9,在70～75 ℃下与等摩尔硫代硫酸钠反应生成Bunte盐,加入反应物重量10%的硫酸,控制温度为80～90 ℃,时间为80min进行酸化反应;再加入反应物重量2%的Zn粉在40～50 ℃下还原80min,得到粗产品;萃取、精馏后巯基乙酸纯度可达98.6%,收率可达到89.7%.     

内陆盐湖石盐流体包裹体均—温度指示意义的现代过程研究

Halite precipitation with water and air temperature was observed in detail, and homogenization temperature of fluid inclusions in halite formed in ancient and modem Chaka Salt Lake was studied. Halite precipitates mainly in August every year and largely precipitates between 13 and 15pm at one day when water temperatures reach 20℃ but can seldom reach 30℃. Homogenization temperatures of fluid inclusions in halite formed in Chaka Salt Lake range from 14℃ to 38℃ with an average of 23.7℃. The number of inclusions appears an obvious peak value at homogenization temperatures between 18 - 25℃, which probably represent the water temperature in which halite mainly precipitates when water temperatures reach 20℃. Therefore, homogenization temperatures of fluid inclusions in halite formed in Chaka Salt Lake can wall reflect the water temperature.