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中国科学院作为“国家队”“国家人”,必须心系“国家事”、肩扛“国家责”。中国科学院理化技术研究所作为国立科研机构,如何在国家未来发展中发挥更大作用？文章在深刻认识科技“国家队”的责任与使命的基础上,从加强顶层计、明确发展规划、恪守使命定位、凝练科研方向、优化体制机制等方面,概述了中国科学院理化技术研究所立足自身优势,聚焦国家需求,服务国家战略,打造专业领域的“国家队”的实践和思考。 相似文献
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结合物理化学的学科特点以及工科材料类专业的学科特点,从教师的教学方法、学生的学习特点两个方面对在物理化学教学过程中出现的问题进行一些思考,阐述了教师如何加强课程教学水平,学生如何牢固地掌握该课程的学习方法与特点。 相似文献
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Type Ⅰ,Ⅲ and Ⅴ collagens were extracted from bovine dermis and cornea by using pepsin treatment in acetic acid solution,followed by salt precipitation and dialysis,to purify and isolate each type of collagens.The preparation process was analyzed by using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE).A reducing agent,2-mercaptoethanol,was used to remove disulfide bonds and analyze the structure of the bonds involved between α chains in some types of collagens.The use of delayed reducin... 相似文献
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Type Ⅰ,Ⅲ and Ⅴ collagens were extracted from bovine dermis and cornea by using pepsin treatment in acetic acid solution,followed by salt precipitation and dialysis,to purify and isolate each type of collagens.The preparation process was analyzed by using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE).A reducing agent,2-mercaptoethanol,was used to remove disulfide bonds and analyze the structure of the bonds involved between α chains in some types of collagens.The use of delayed reducing methods resulted in the difference between α1(Ⅲ) and α1(Ⅰ) chains in a mixture containing type Ⅰ and Ⅲ collagens.The structure of disulfide bonds among α chains exists potentially in type Ⅴ collagen prepared from the pepsin-treatment extraction at 4℃,which differs from type Ⅲ collagen in relation to the locations of disulfide bonds.Compared with pepsin-treated collagen at 4℃,the relative molecular weights of α1(Ⅴ) and α2(Ⅴ) chains treated at room temperature decrease by 4.6% and 6.0%,respectively.It is concluded that type Ⅰ,Ⅲ and Ⅴ collagens can be prepared from bovine dermis and cornea by the use of pepsin treatment,salt precipitation and dialysis.The interchain disulfide bonds lie potentially near the edges of termini of type Ⅴ collagen molecules in extracellular matrix,and a small number of interchain crosslinks exist in type Ⅴ collagen. 相似文献
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对一个带有自扩散和交叉扩散的捕食-被捕食模型进行研究,分析了该模型平衡点的局部以及全局稳定性,研究了当系统同时考虑自扩散和交叉扩散影响时稳定性的变化。证明了交叉扩散系数的变化对于该模型的局部和全局稳定性有重要的影响,并且证明了由交叉扩散导致的图灵失稳的多种情形。 相似文献
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结合物理化学的学科特点以及工科材料类专业的学科特点,从教师的教学方法、学生的学习特点两个方面对在物理化学教学过程中出现的问题进行一些思考,阐述了教师如何加强课程教学水平,学生如何牢固地掌握该课程的学习方法与特点。 相似文献
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