全文获取类型
收费全文 | 146篇 |
免费 | 0篇 |
专业分类
教育与普及 | 1篇 |
现状及发展 | 31篇 |
研究方法 | 13篇 |
综合类 | 96篇 |
自然研究 | 5篇 |
出版年
2013年 | 1篇 |
2012年 | 2篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2008年 | 8篇 |
2007年 | 4篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 5篇 |
2003年 | 5篇 |
2002年 | 6篇 |
2001年 | 5篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1985年 | 7篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1972年 | 11篇 |
1971年 | 3篇 |
1970年 | 1篇 |
1969年 | 2篇 |
1968年 | 5篇 |
1967年 | 2篇 |
1966年 | 5篇 |
1965年 | 1篇 |
排序方式: 共有146条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
Yooseph S Nealson KH Rusch DB McCrow JP Dupont CL Kim M Johnson J Montgomery R Ferriera S Beeson K Williamson SJ Tovchigrechko A Allen AE Zeigler LA Sutton G Eisenstadt E Rogers YH Friedman R Frazier M Venter JC 《Nature》2010,468(7320):60-66
The understanding of marine microbial ecology and metabolism has been hampered by the paucity of sequenced reference genomes. To this end, we report the sequencing of 137 diverse marine isolates collected from around the world. We analysed these sequences, along with previously published marine prokaryotic genomes, in the context of marine metagenomic data, to gain insights into the ecology of the surface ocean prokaryotic picoplankton (0.1-3.0?μm size range). The results suggest that the sequenced genomes define two microbial groups: one composed of only a few taxa that are nearly always abundant in picoplanktonic communities, and the other consisting of many microbial taxa that are rarely abundant. The genomic content of the second group suggests that these microbes are capable of slow growth and survival in energy-limited environments, and rapid growth in energy-rich environments. By contrast, the abundant and cosmopolitan picoplanktonic prokaryotes for which there is genomic representation have smaller genomes, are probably capable of only slow growth and seem to be relatively unable to sense or rapidly acclimate to energy-rich conditions. Their genomic features also lead us to propose that one method used to avoid predation by viruses and/or bacterivores is by means of slow growth and the maintenance of low biomass. 相似文献
45.
Initial sequencing and comparative analysis of the mouse genome 总被引:2,自引:0,他引:2
Mouse Genome Sequencing Consortium Waterston RH Lindblad-Toh K Birney E Rogers J Abril JF Agarwal P Agarwala R Ainscough R Alexandersson M An P Antonarakis SE Attwood J Baertsch R Bailey J Barlow K Beck S Berry E Birren B Bloom T Bork P Botcherby M Bray N Brent MR Brown DG Brown SD Bult C Burton J Butler J Campbell RD Carninci P Cawley S Chiaromonte F Chinwalla AT Church DM Clamp M Clee C Collins FS Cook LL Copley RR Coulson A Couronne O Cuff J Curwen V Cutts T Daly M David R Davies J 《Nature》2002,420(6915):520-562
The sequence of the mouse genome is a key informational tool for understanding the contents of the human genome and a key experimental tool for biomedical research. Here, we report the results of an international collaboration to produce a high-quality draft sequence of the mouse genome. We also present an initial comparative analysis of the mouse and human genomes, describing some of the insights that can be gleaned from the two sequences. We discuss topics including the analysis of the evolutionary forces shaping the size, structure and sequence of the genomes; the conservation of large-scale synteny across most of the genomes; the much lower extent of sequence orthology covering less than half of the genomes; the proportions of the genomes under selection; the number of protein-coding genes; the expansion of gene families related to reproduction and immunity; the evolution of proteins; and the identification of intraspecies polymorphism. 相似文献
46.
A systematic, genome-wide, phenotype-driven mutagenesis programme for gene function studies in the mouse 总被引:37,自引:0,他引:37
Nolan PM Peters J Strivens M Rogers D Hagan J Spurr N Gray IC Vizor L Brooker D Whitehill E Washbourne R Hough T Greenaway S Hewitt M Liu X McCormack S Pickford K Selley R Wells C Tymowska-Lalanne Z Roby P Glenister P Thornton C Thaung C Stevenson JA Arkell R Mburu P Hardisty R Kiernan A Erven A Steel KP Voegeling S Guenet JL Nickols C Sadri R Nasse M Isaacs A Davies K Browne M Fisher EM Martin J Rastan S Brown SD Hunter J 《Nature genetics》2000,25(4):440-443
As the human genome project approaches completion, the challenge for mammalian geneticists is to develop approaches for the systematic determination of mammalian gene function. Mouse mutagenesis will be a key element of studies of gene function. Phenotype-driven approaches using the chemical mutagen ethylnitrosourea (ENU) represent a potentially efficient route for the generation of large numbers of mutant mice that can be screened for novel phenotypes. The advantage of this approach is that, in assessing gene function, no a priori assumptions are made about the genes involved in any pathway. Phenotype-driven mutagenesis is thus an effective method for the identification of novel genes and pathways. We have undertaken a genome-wide, phenotype-driven screen for dominant mutations in the mouse. We generated and screened over 26,000 mice, and recovered some 500 new mouse mutants. Our work, along with the programme reported in the accompanying paper, has led to a substantial increase in the mouse mutant resource and represents a first step towards systematic studies of gene function in mammalian genetics. 相似文献
47.
The identification of labelled structures on autoradiographs 总被引:2,自引:0,他引:2
48.
49.
50.
Exon shuffling and intron insertion in serine protease genes 总被引:3,自引:0,他引:3