全文获取类型
收费全文 | 652篇 |
免费 | 1篇 |
国内免费 | 9篇 |
专业分类
系统科学 | 10篇 |
教育与普及 | 4篇 |
理论与方法论 | 4篇 |
现状及发展 | 135篇 |
研究方法 | 99篇 |
综合类 | 386篇 |
自然研究 | 24篇 |
出版年
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 7篇 |
2014年 | 8篇 |
2013年 | 6篇 |
2012年 | 42篇 |
2011年 | 73篇 |
2010年 | 18篇 |
2009年 | 8篇 |
2008年 | 50篇 |
2007年 | 51篇 |
2006年 | 49篇 |
2005年 | 35篇 |
2004年 | 30篇 |
2003年 | 50篇 |
2002年 | 33篇 |
2001年 | 12篇 |
2000年 | 11篇 |
1999年 | 5篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1992年 | 7篇 |
1991年 | 4篇 |
1990年 | 8篇 |
1989年 | 7篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 9篇 |
1984年 | 2篇 |
1983年 | 5篇 |
1982年 | 6篇 |
1980年 | 4篇 |
1979年 | 12篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1976年 | 7篇 |
1975年 | 9篇 |
1974年 | 7篇 |
1973年 | 5篇 |
1972年 | 6篇 |
1971年 | 9篇 |
1970年 | 7篇 |
1969年 | 3篇 |
1968年 | 2篇 |
1967年 | 6篇 |
1965年 | 4篇 |
1962年 | 2篇 |
排序方式: 共有662条查询结果,搜索用时 31 毫秒
71.
A. Baker 《Cellular and molecular life sciences : CMLS》1996,52(12):1055-1062
Our level of understanding of peroxisome biogenesis in comparison with other cellular organelles is rudimentary, yet the fragments of information available indicate that the targeting and import of peroxisomal proteins occur by fundamentally different mechanisms. Genetic studies have identified a number of genes required for peroxisome assembly, but in most cases the functions of the gene products remain unknown. In vitro protein translocation systems have played a prominent role in unravelling the biochemistry of protein translocation into other organelles. This review considers some of the requirements for establishing a bona fide peroxisomal import assay and discusses the findings which have emerged as a result of using such experimental systems. 相似文献
72.
S. R. Philips G. B. Baker H. R. McKim 《Cellular and molecular life sciences : CMLS》1980,36(2):241-242
Summary Concentrations of 4 trace amines in diencephalon and hippocampus of the rat were measured by integrated-ioncurrent mass spectrometry after administration of the antidepressant drug, tranylcypromine. Much larger increases were observed for 2-phenylethylamine and tryptamine than for m- and p-tyramine.Financial support has been provided by the Medical Research Council of Canada, the Psychiatric Services Branch, Province of Saskatchewan, the Alberta Mental health Research Fund, and the Special Services and Research Committee, University of Alberta Hospital.Acknowledgments. The authors wish to thank Dr B.A. Davis for synthesizing the deuterated internal standards and Dr D.A. Durden for supervising the mass spectral analyses. Expert technical assistance was provided by Mr R.C. Mag-Atas and Ms D.G. Calverley. The advice and encouragement of Professors W. G. Dewhurst and A. A. Boulton are gratefully acknowledged. 相似文献
73.
74.
75.
76.
Three-dimensional structure of a complex of antibody with influenza virus neuraminidase 总被引:3,自引:0,他引:3
P M Colman W G Laver J N Varghese A T Baker P A Tulloch G M Air R G Webster 《Nature》1987,326(6111):358-363
The structure of a complex between influenza virus neuraminidase and an antibody displays features inconsistent with the inflexible 'lock and key' model of antigen-antibody binding. The structure of the antigen changes on binding, and that of the antibody may also change; the interaction therefore has some of the character of a handshake. 相似文献
77.
78.
79.
80.
Algae thrive under pure CO2 总被引:3,自引:0,他引:3