全文获取类型
收费全文 | 1302篇 |
免费 | 167篇 |
出版年
2022年 | 11篇 |
2021年 | 17篇 |
2019年 | 16篇 |
2018年 | 23篇 |
2017年 | 17篇 |
2016年 | 34篇 |
2015年 | 48篇 |
2014年 | 53篇 |
2013年 | 78篇 |
2012年 | 66篇 |
2011年 | 70篇 |
2010年 | 39篇 |
2009年 | 44篇 |
2008年 | 67篇 |
2007年 | 57篇 |
2006年 | 46篇 |
2005年 | 55篇 |
2004年 | 28篇 |
2003年 | 34篇 |
2002年 | 39篇 |
2001年 | 40篇 |
2000年 | 26篇 |
1999年 | 27篇 |
1998年 | 15篇 |
1997年 | 14篇 |
1996年 | 18篇 |
1995年 | 19篇 |
1994年 | 17篇 |
1993年 | 12篇 |
1992年 | 21篇 |
1991年 | 14篇 |
1990年 | 22篇 |
1989年 | 15篇 |
1988年 | 20篇 |
1987年 | 21篇 |
1986年 | 18篇 |
1985年 | 20篇 |
1984年 | 15篇 |
1983年 | 19篇 |
1982年 | 13篇 |
1981年 | 13篇 |
1980年 | 16篇 |
1977年 | 16篇 |
1976年 | 10篇 |
1975年 | 12篇 |
1974年 | 23篇 |
1973年 | 11篇 |
1972年 | 12篇 |
1971年 | 10篇 |
1968年 | 18篇 |
排序方式: 共有1469条查询结果,搜索用时 468 毫秒
191.
192.
193.
194.
David A. Sandham Claire Adcock Kamlesh Bala Lucy Barker Zarin Brown Gerald Dubois David Budd Brian Cox Robin A. Fairhurst Markus Furegati Catherine Leblanc Jodie Manini Rachael Profit John Reilly Rowan Stringer Alfred Schmidt Katharine L. Turner Simon J. Watson Jennifer Willis Gareth Williams Caroline Wilson 《Bioorganic & medicinal chemistry letters》2009,19(16):4794-4798
High throughput screening identified a 7-azaindole-3-acetic acid scaffold as a novel CRTh2 receptor antagonist chemotype, which could be optimised to furnish a highly selective compound with good functional potency for inhibition of human eosinophil shape change in whole blood and oral bioavailability in the rat. 相似文献
195.
J Willis 《BMJ (Clinical research ed.)》1986,292(6537):1715-1716
A method is described for the systematic assessment and review of long term dependent patients in a small practice using a personally developed computer program and assessment scale. 相似文献
196.
197.
J. S. Willis J. C. Ellory M. W. Wolowyk 《Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology》1980,138(1):43-47
Summary Ouabain-sensitive K influx was measured at 5°C and 37°C in red cells from seven species of mammals known to hibernate, and nine species of non-hibernators. Care was taken to saturate the internal and external cation sites of the sodium pump, and maintain the cell metabolism. Species variation in ouabain-resistance among rodents was also taken into account. In six out of seven species of hibernators the pump was relatively insensitive to lowering the temperature, the ratio of activity at 5°C/37°C being >1.8%. By contrast eight of the nine non-hibernator species gave a ratio <1.8%. The two exceptions were the hamster, which gave a ratio of 0.8% as a hibernator, and the mole which gave a ratio of 3% as a non-hibernator. No similar correlation was observed for the ouabain-insensitive K influx, in either groups of animals. It is concluded that cold tolerance of the sodium pump is a general but not essential property of hibernator red cells. 相似文献
198.
199.
V Dombrádi A C Willis G Vereb L N Johnson 《Comparative biochemistry and physiology. B, Comparative biochemistry》1988,91(4):717-721
1. A tetradecapeptide containing the phosphorylation site was obtained from 32P-labelled pig heart phosphorylase a isoenzyme by alpha-chymotryptic digestion. 2. The peptide was purified by Mono S cation-exchange chromatography and reversed-phase HPLC. 3. The phosphorylated residue was identified as Ser and the sequence was determined: T D G E R R K Q I S V R G L. 4. The sequence was compared to the known sequences of muscle and liver type isophosphorylases and the structural consequences of the amino acid residue exchanges were predicted. 相似文献
200.