全文获取类型
收费全文 | 751篇 |
免费 | 36篇 |
国内免费 | 7篇 |
专业分类
794篇 |
出版年
2022年 | 14篇 |
2021年 | 33篇 |
2020年 | 19篇 |
2019年 | 6篇 |
2018年 | 11篇 |
2017年 | 5篇 |
2016年 | 14篇 |
2015年 | 25篇 |
2014年 | 24篇 |
2013年 | 48篇 |
2012年 | 52篇 |
2011年 | 54篇 |
2010年 | 28篇 |
2009年 | 20篇 |
2008年 | 42篇 |
2007年 | 36篇 |
2006年 | 32篇 |
2005年 | 27篇 |
2004年 | 29篇 |
2003年 | 27篇 |
2002年 | 13篇 |
2001年 | 19篇 |
2000年 | 19篇 |
1999年 | 21篇 |
1998年 | 5篇 |
1997年 | 16篇 |
1996年 | 3篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 3篇 |
1992年 | 10篇 |
1991年 | 5篇 |
1990年 | 6篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 10篇 |
1986年 | 10篇 |
1985年 | 6篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1982年 | 8篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 11篇 |
1978年 | 9篇 |
1976年 | 3篇 |
1972年 | 6篇 |
1966年 | 2篇 |
1965年 | 3篇 |
1963年 | 3篇 |
排序方式: 共有794条查询结果,搜索用时 0 毫秒
771.
772.
773.
S K Pandian T Somasundaram J Jayaraman M Lakshmanan 《Archives of biochemistry and biophysics》1982,216(2):768-770
The pathogenic effect of cotton blight disease is influenced by Xanthomonas malvacearum toxin. The toxin has been highly purified and the interaction between the toxin and the energy-generating system of mitochondria has been characterized. The results show that the toxin inhibits the ATP-ADP translocase system of the mitochondria. 相似文献
774.
775.
776.
Physiological parameters such as viability, gross RNA synthesis,β-galactosidase induction, development of phages T4, T7 andλ have been studied in temperature-sensitiveEscherichia coli strains harbouring fit A76,fit A24 andfit A76fit A24 mutations in rpoB+ andrpoB240 genetic backgrounds. The efficiently of expression of these functions is influenced by thefit A alleles depending upon the medium of growth and/or temperature. Strains harbouring therpoB240 mutation and thefit A76 mutation, either alone or together with thefit A24 mutation, are rifampicin-sensitive even at the perfssive temperature. The results suggest possible interaction between
thefit A gene product and RNA polymerase invivo.
This paper is dedicated to Proof. S. Krishnaswamy on his Sixty First Birthday. 相似文献
777.
778.
779.
Penicillin at concentrations non-inhibitory to the vegetative growth was found to inhibit sporulation inBacillus polymyxa 2459. The effect of penicillin was shown to be at the level of spore-specific mucopeptide synthesis. Penicillin had no effect
on the early events such as DNA and protein synthesis in sporogenesis The sensitive period of inhibition was between T0 to T2 hours of sporulation. 相似文献
780.
Mitochondria isolated from the gill tissues of the fishSarothredon mossambica were analysed for their macromolecular content, following transfer from freshwater to media of higher salinity. The results
suggest a breakdown of mitochondria during the initial phases of the stress and a regeneration during continued exposure.
Also all the synthetic machineries, in general, seem to be triggered in gill tissue during continuous exposure to hyperosmotic
media. 相似文献