全文获取类型
收费全文 | 810篇 |
免费 | 33篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 38篇 |
妇产科学 | 8篇 |
基础医学 | 74篇 |
口腔科学 | 7篇 |
临床医学 | 61篇 |
内科学 | 147篇 |
皮肤病学 | 6篇 |
神经病学 | 59篇 |
特种医学 | 132篇 |
外科学 | 50篇 |
综合类 | 47篇 |
预防医学 | 53篇 |
眼科学 | 59篇 |
药学 | 66篇 |
肿瘤学 | 47篇 |
出版年
2021年 | 9篇 |
2018年 | 13篇 |
2017年 | 7篇 |
2016年 | 4篇 |
2015年 | 8篇 |
2014年 | 7篇 |
2013年 | 15篇 |
2012年 | 15篇 |
2011年 | 19篇 |
2010年 | 11篇 |
2009年 | 19篇 |
2008年 | 10篇 |
2007年 | 25篇 |
2006年 | 22篇 |
2005年 | 34篇 |
2004年 | 18篇 |
2003年 | 28篇 |
2002年 | 44篇 |
2001年 | 24篇 |
2000年 | 27篇 |
1999年 | 16篇 |
1998年 | 28篇 |
1997年 | 40篇 |
1996年 | 51篇 |
1995年 | 27篇 |
1994年 | 28篇 |
1993年 | 31篇 |
1992年 | 16篇 |
1991年 | 11篇 |
1990年 | 14篇 |
1989年 | 23篇 |
1988年 | 27篇 |
1987年 | 19篇 |
1986年 | 25篇 |
1985年 | 8篇 |
1984年 | 12篇 |
1983年 | 7篇 |
1982年 | 11篇 |
1981年 | 6篇 |
1980年 | 10篇 |
1979年 | 4篇 |
1978年 | 8篇 |
1977年 | 7篇 |
1976年 | 13篇 |
1975年 | 6篇 |
1972年 | 4篇 |
1969年 | 5篇 |
1967年 | 5篇 |
1966年 | 4篇 |
1965年 | 5篇 |
排序方式: 共有859条查询结果,搜索用时 46 毫秒
1.
The effect of some tricyclic antidepressants on the inhibition of mouse brain monoamine oxidase in-vivo by phenelzine 总被引:1,自引:0,他引:1
Four tricyclic antidepressants, amitriptyline, imipramine, desipramine and iprindole have been shown to partially protect mouse brain monoamine oxidase in-vivo from the irreversible enzyme inhibition produced by subsequent injection of phenelzine. Levels of protection were similar when the enzyme was assayed with selective substrates (5-hydroxytryptamine and phenethylamine) for both the A and B forms of the enzyme. Although other explanations cannot at this stage be ruled out, these observations are consistent with the tricyclic antidepressants acting as reversible inhibitors of brain monoamine oxidase in-vivo. 相似文献
2.
3.
4.
5.
We currently perform a study investigating the ocular hemody-namic effects of topical dorzolamide versus topical timolol in patients with open angle glaucoma and ocular hypertension. We report on the baseline fundus pulsation amplitude as measured with laser interferometry in 136 patients who have been included 相似文献
6.
7.
8.
Low-artifact intravascular devices: MR imaging evaluation 总被引:2,自引:0,他引:2
Teitelbaum GP; Ortega HV; Vinitski S; Stern H; Tsuruda JS; Mitchell DG; Rifkin MD; Bradley WG Jr 《Radiology》1988,168(3):713-719
Flow-phantom magnetic resonance (MR) imaging, with use of both spin-echo (SE) and gradient-echo (GRE) techniques at 1.5 T, was performed on the percutaneous Greenfield (beta-III titanium alloy [TMA wire]), Amplatz (MP32-N alloy), and Simon nitinol filters and TMA wire facsimiles of the bird's nest, Gunther, new retrievable, and Amplatz vena caval filters. SE imaging allowed detection of thrombi as small as 5 X 5 mm trapped within the percutaneous Greenfield, Simon nitinol, and TMA-wire facsimile filters; with the MP32-N Amplatz filter, a larger volume of thrombus (10 X 20-mm clots) was necessary for clot detection. GRE imaging allowed detection of intraluminal tilting of the percutaneous Greenfield and facsimile Amplatz (TMA-wire) filters. GRE imaging was useful for demonstrating postfilter turbulence due to clots, which was greatest for the Amplatz filter. Imaging of facsimile vascular devices made of tantalum or TMA wire did not cause the severe "black-hole" MR artifacts typical of the stainless-steel devices. SE and GRE imaging were very useful for determining caval patency in two patients with previously placed Mobin-Uddin filters. Noninvasive MR evaluation of blood vessels in the presence of a variety of low-artifact intravascular devices appears feasible. 相似文献
9.
10.
Variability of skin temperature in the waking monkey 总被引:3,自引:0,他引:3