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   737篇
  免费   1篇
  国内免费   2篇
系统科学   16篇
丛书文集   2篇
教育与普及   1篇
理论与方法论   13篇
现状及发展   105篇
研究方法   149篇
综合类   432篇
自然研究   22篇
  2021年   5篇
  2018年   5篇
  2017年   7篇
  2016年   3篇
  2015年   6篇
  2014年   5篇
  2013年   6篇
  2012年   75篇
  2011年   102篇
  2010年   27篇
  2009年   11篇
  2008年   62篇
  2007年   42篇
  2006年   48篇
  2005年   39篇
  2004年   46篇
  2003年   26篇
  2002年   27篇
  2001年   10篇
  2000年   14篇
  1999年   15篇
  1997年   3篇
  1996年   2篇
  1995年   2篇
  1992年   11篇
  1991年   4篇
  1990年   7篇
  1989年   6篇
  1987年   10篇
  1986年   6篇
  1985年   4篇
  1984年   6篇
  1983年   3篇
  1982年   4篇
  1981年   4篇
  1980年   3篇
  1979年   9篇
  1978年   4篇
  1977年   2篇
  1976年   5篇
  1975年   2篇
  1974年   5篇
  1973年   8篇
  1972年   2篇
  1971年   4篇
  1970年   10篇
  1969年   5篇
  1968年   6篇
  1967年   8篇
  1965年   5篇
排序方式: 共有740条查询结果,搜索用时 203 毫秒
1.
The career of John Jackson (1686-1763), Arian theologian and controversialist, provides a key to unlocking the early reception and quick collapse of a Newtonian natural apologetic originally developed by Samuel Clarke. The importance of friendship and discipleship in eighteenth-century intellectual enquiry is emphasised, and the links between Newton and his followers are traced alongside those of a group of Cambridge Lockeans, led by Jackson’s direct contemporary Daniel Waterland, who proved instrumental in the initial dismantling of Clarke’s brand of Newtonian apologetic. The controversial context of this engagement is shown to have been largely provided by the religiously compromising rise of freethinking, and Tindal’s Christianity as old as the creation (1731) signalled the dangers to proponents of natural religion as an adjunct of Christian apologetic in such a heated atmosphere. Religious division of the sort that resulted paradoxically played into the hands of the freethinkers in the anticlerical atmosphere of the 1730s, and accusations were exchanged between Newtonians and Lockeans accordingly. The dynamic of England’s Enlightenment experience is, then, a complicated one, and, as the career and writings of Jackson and William Whiston demonstrate, it was one which absorbed as well as repudiated ‘enthusiasm’.  相似文献   
2.
This paper explores themethodological consequences of AmericanPragmatism for the social sciences. It alsocriticises some rival perspectives onmethodology of social research, in particularfalsificationist, realist and someanti-naturalist views. It is argued thatAmerican Pragmatism shows striking affinitieswith the genealogical method of history and thereflexive turn in cultural anthropology. It isalso argued that Pragmatism forces us to thinkdifferently about the relationship betweentheory and empirical research.  相似文献   
3.
4.
5.
High-frequency generalised transduction by bacteriophage T4   总被引:30,自引:0,他引:30  
Wilson GG  Young KY  Edlin GJ  Konigsberg W 《Nature》1979,280(5717):80-82
  相似文献   
6.
Ubiquitination, the covalent attachment of ubiquitin to a target protein, regulates most cellular processes and is involved in several neurological disorders. In particular, Angelman syndrome and one of the most common genomic forms of autism, dup15q, are caused respectively by lack of or excess of UBE3A, a ubiquitin E3 ligase. Its Drosophila orthologue, Ube3a, is also active during brain development. We have now devised a protocol to screen for substrates of this particular ubiquitin ligase. In a neuronal cell system, we find direct ubiquitination by Ube3a of three proteasome-related proteins Rpn10, Uch-L5, and CG8209, as well as of the ribosomal protein Rps10b. Only one of these, Rpn10, is targeted for degradation upon ubiquitination by Ube3a, indicating that degradation might not be the only effect of Ube3a on its substrates. Furthermore, we report the genetic interaction in vivo between Ube3a and the C-terminal part of Rpn10. Overexpression of these proteins leads to an enhanced accumulation of ubiquitinated proteins, further supporting the biochemical evidence of interaction obtained in neuronal cells.  相似文献   
7.
8.
With the advent of dense maps of human genetic variation, it is now possible to detect positive natural selection across the human genome. Here we report an analysis of over 3 million polymorphisms from the International HapMap Project Phase 2 (HapMap2). We used 'long-range haplotype' methods, which were developed to identify alleles segregating in a population that have undergone recent selection, and we also developed new methods that are based on cross-population comparisons to discover alleles that have swept to near-fixation within a population. The analysis reveals more than 300 strong candidate regions. Focusing on the strongest 22 regions, we develop a heuristic for scrutinizing these regions to identify candidate targets of selection. In a complementary analysis, we identify 26 non-synonymous, coding, single nucleotide polymorphisms showing regional evidence of positive selection. Examination of these candidates highlights three cases in which two genes in a common biological process have apparently undergone positive selection in the same population:LARGE and DMD, both related to infection by the Lassa virus, in West Africa;SLC24A5 and SLC45A2, both involved in skin pigmentation, in Europe; and EDAR and EDA2R, both involved in development of hair follicles, in Asia.  相似文献   
9.
10.
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