首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   216篇
  免费   1篇
  国内免费   2篇
系统科学   2篇
丛书文集   53篇
现状及发展   37篇
研究方法   11篇
综合类   113篇
自然研究   3篇
  2020年   3篇
  2018年   1篇
  2017年   3篇
  2016年   1篇
  2015年   2篇
  2014年   1篇
  2013年   3篇
  2012年   9篇
  2011年   11篇
  2010年   4篇
  2009年   6篇
  2008年   6篇
  2007年   10篇
  2006年   4篇
  2005年   7篇
  2004年   6篇
  2003年   4篇
  2002年   8篇
  1997年   1篇
  1991年   1篇
  1979年   1篇
  1968年   1篇
  1959年   16篇
  1958年   30篇
  1957年   22篇
  1956年   10篇
  1955年   15篇
  1954年   23篇
  1948年   7篇
  1947年   3篇
排序方式: 共有219条查询结果,搜索用时 15 毫秒
141.
142.
This paper introduces a non-assembly manufacturing case with microstereolithography technology. The design and manufacturing process of a pneumatic thrust bearing is described, and a special tessellation method is developed to further improve the capability of the manufacturing system thus bigger products can also be easily manufactured. Implemented in a layer-by-layer fashion, stereolithography has been used for the rapid manufacturing of complex devices, and it avoids the expensive assembly process in the traditional manufacturing. This paper presents that microstereolithography can produce high-resolution products with intricate details, small openings, and smooth surfaces. The potential of the microstereolithograhy technique is explored for the rapid manufacturing of small and complex objects.  相似文献   
143.
It is generally recognized that a large fraction of the human proteome is made up of proteins that remain disordered in their native states. Despite the fact that such proteins play key biological roles and are involved in many major human diseases, they still represent challenging targets for drug discovery. A major bottleneck for the identification of compounds capable of interacting with these proteins and modulating their disease-promoting behaviour is the development of effective techniques to probe such interactions. The difficulties in carrying out binding measurements have resulted in a poor understanding of the mechanisms underlying these interactions. In order to facilitate further methodological advances, here we review the most commonly used techniques to probe three types of interactions involving small molecules: (1) those that disrupt functional interactions between disordered proteins; (2) those that inhibit the aberrant aggregation of disordered proteins, and (3) those that lead to binding disordered proteins in their monomeric states. In discussing these techniques, we also point out directions for future developments.  相似文献   
144.
145.
146.
147.
Enterotoxicity of bacteria-free culture-filtrate of Vibrio cholerae   总被引:10,自引:0,他引:10  
DE SN 《Nature》1959,183(4674):1533-1534
  相似文献   
148.
149.
150.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号