The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivati...The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivatives, which can not be obtained by the general method using MsCl and Et3N as dehydrating cyclization reagent.展开更多
PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-S...PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-Society)是一项对学生关于STS主题的理解的问卷,它由一系列"基于学生经验"的多选题构成。它获取的是学生的观点,是定性的数据,而非定量的分数。DAST(Draw a Scientist Test)和DATT(Draw a Technologist Test),是用绘图的方式来测试学生对科学技术工作人员的印象。展开更多
文摘The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivatives, which can not be obtained by the general method using MsCl and Et3N as dehydrating cyclization reagent.
文摘PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-Society)是一项对学生关于STS主题的理解的问卷,它由一系列"基于学生经验"的多选题构成。它获取的是学生的观点,是定性的数据,而非定量的分数。DAST(Draw a Scientist Test)和DATT(Draw a Technologist Test),是用绘图的方式来测试学生对科学技术工作人员的印象。
基金National Science Foundation of China(51172111,51402159)Innovation Project of China Electronics Technology Group Corporation No.46 Research Institute(CJ20140401)
