全文获取类型
收费全文 | 711篇 |
免费 | 63篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 28篇 |
妇产科学 | 13篇 |
基础医学 | 79篇 |
口腔科学 | 49篇 |
临床医学 | 81篇 |
内科学 | 137篇 |
皮肤病学 | 18篇 |
神经病学 | 23篇 |
特种医学 | 105篇 |
外科学 | 79篇 |
综合类 | 39篇 |
一般理论 | 1篇 |
预防医学 | 48篇 |
眼科学 | 8篇 |
药学 | 46篇 |
中国医学 | 2篇 |
肿瘤学 | 29篇 |
出版年
2023年 | 5篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2018年 | 11篇 |
2017年 | 11篇 |
2016年 | 14篇 |
2015年 | 11篇 |
2014年 | 7篇 |
2013年 | 19篇 |
2012年 | 20篇 |
2011年 | 22篇 |
2010年 | 20篇 |
2009年 | 33篇 |
2008年 | 12篇 |
2007年 | 43篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 24篇 |
2003年 | 10篇 |
2002年 | 18篇 |
2001年 | 10篇 |
2000年 | 19篇 |
1999年 | 16篇 |
1998年 | 26篇 |
1997年 | 41篇 |
1996年 | 42篇 |
1995年 | 22篇 |
1994年 | 19篇 |
1993年 | 23篇 |
1992年 | 4篇 |
1991年 | 16篇 |
1990年 | 10篇 |
1989年 | 20篇 |
1988年 | 21篇 |
1987年 | 19篇 |
1986年 | 20篇 |
1985年 | 18篇 |
1984年 | 9篇 |
1983年 | 16篇 |
1982年 | 12篇 |
1981年 | 10篇 |
1980年 | 9篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1976年 | 5篇 |
1970年 | 5篇 |
1969年 | 5篇 |
1968年 | 4篇 |
1967年 | 3篇 |
排序方式: 共有791条查询结果,搜索用时 187 毫秒
51.
52.
53.
Biosynthesis and secretion of factor VII, protein C, protein S, and the Protein C inhibitor from a human hepatoma cell line 总被引:7,自引:0,他引:7
Using specific radioimmunoassays, 8 day cultures of Hep G2 cells were shown to contain in their supernatants 16, 74, and 828 ng/mL and in their cell lysates, 8, 55, and 48 ng/2 X 10(8) cells of factor VII, protein C, and protein S, respectively. These proteins and the protein C inhibitor were functionally active, and each of these activities was neutralized by their respective polyclonal antibodies. Although vitamin K had a modest effect, warfarin decreased the activity of secreted factor VII, protein C, and protein S by 50% to 90%. Protein C and protein S antigens were reduced three- to fourfold by warfarin. The protein C inhibitor antigen and activity were unaffected by vitamin K or warfarin treatment. Intrinsic labeling and immunoprecipitation indicated that factor VII, protein S, and the protein C inhibitor were secreted as 52,000, 77,000, and 58,000 molecular weight (mol wt) proteins, respectively. Protein C was secreted as a single-chain protein of about 65,000 mol wt, indicating that all of the vitamin K- dependent proteins are translated and secreted as single-chain molecules. Each of the four proteins studied represented their plasma protein counterparts structurally, functionally, and immunochemically. Thus, all of the known soluble components of the protein C pathway are produced by liver parenchymal cells. 相似文献
54.
55.
56.
57.
58.
59.
The relation between the work performed and the energy liberated in muscular contraction 总被引:8,自引:0,他引:8
Fenn WO 《The Journal of physiology》1924,58(6):373-395
60.