全文获取类型
收费全文 | 845篇 |
免费 | 46篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 32篇 |
妇产科学 | 4篇 |
基础医学 | 80篇 |
口腔科学 | 5篇 |
临床医学 | 88篇 |
内科学 | 198篇 |
皮肤病学 | 11篇 |
神经病学 | 27篇 |
特种医学 | 140篇 |
外科学 | 67篇 |
综合类 | 32篇 |
一般理论 | 3篇 |
预防医学 | 116篇 |
眼科学 | 2篇 |
药学 | 26篇 |
中国医学 | 3篇 |
肿瘤学 | 68篇 |
出版年
2020年 | 3篇 |
2019年 | 9篇 |
2018年 | 13篇 |
2017年 | 8篇 |
2016年 | 12篇 |
2015年 | 12篇 |
2014年 | 17篇 |
2013年 | 29篇 |
2012年 | 21篇 |
2011年 | 29篇 |
2010年 | 23篇 |
2009年 | 32篇 |
2008年 | 37篇 |
2007年 | 34篇 |
2006年 | 26篇 |
2005年 | 28篇 |
2004年 | 19篇 |
2003年 | 22篇 |
2002年 | 13篇 |
2001年 | 14篇 |
2000年 | 25篇 |
1999年 | 20篇 |
1998年 | 49篇 |
1997年 | 36篇 |
1996年 | 23篇 |
1995年 | 16篇 |
1994年 | 15篇 |
1993年 | 17篇 |
1992年 | 13篇 |
1991年 | 8篇 |
1990年 | 16篇 |
1989年 | 16篇 |
1988年 | 27篇 |
1987年 | 16篇 |
1986年 | 27篇 |
1985年 | 33篇 |
1984年 | 21篇 |
1983年 | 15篇 |
1982年 | 13篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 9篇 |
1978年 | 10篇 |
1977年 | 11篇 |
1976年 | 5篇 |
1975年 | 6篇 |
1974年 | 6篇 |
1973年 | 4篇 |
1972年 | 7篇 |
1966年 | 4篇 |
排序方式: 共有903条查询结果,搜索用时 15 毫秒
1.
2.
Marc J. P. M. van Veldhoven Judith K. Sluiter 《International archives of occupational and environmental health》2009,82(9):1065-1075
Objectives
Recovery opportunities allow employees to recuperate from work and diminish load effects. The aims of this study are to present a scale for measuring recovery opportunities, study its psychometric properties and its relationship with health. 相似文献3.
4.
5.
Brandon JC; Teplick SK; Haskin PH; Sammon JK; Muhr WF; Hofmann AF; Gambescia RA; Zitomer N 《Radiology》1988,166(3):665-667
The authors describe their experience with methyl tertiary butyl ether (MTBE) in a larger series of patients than previously reported in order to acquaint physicians with both its effectiveness for dissolution of common bile duct calculi and the limitations of its use. Ten patients with 13 biliary calculi underwent percutaneous stone dissolution treatment with the experimental cholesterol solvent, MTBE. Three stones completely dissolved within 30 minutes, seven were reduced in size, and three were visibly unaffected. All stones not completely dissolved were easily extracted by means of a stone basket except for one in a patient taken to surgery. Although MTBE perfusion is an effective technique for management of biliary calculi, practitioners should be aware that its use is quite time consuming and its odor difficult to control. 相似文献
6.
J. A. P. van de Nes A. A. Sluiter C. W. Pool W. Kamphorst R. Ravid D. F. Swaab 《Brain research》1994,655(1-2)
The monoclonal antibody Alz-50 is directed against Alzheimer's disease-related modified tau proteins and reveals cytoskeletal changes, i.e. neurofibrillary tangles and dystrophic neurites. The present study shows that, in the hypothalamus of non-demented control subjects, this same antibody gives a distinctive staining pattern of a subpopulation of somatostatin neurons and beaded fibers. Furthermore, Alz-50 occasionally recognizes somatostatin-containing cell bodies and dystrophic neurite-like fibers in the (neuritic) senile plaques of AD patients. These observations have direct consequences for the interpretation of Alz-50 staining in diagnostic usage and for the assessment of Alzheimer's disease-like changes induced by β-amyloid in experimental animal brains. On dot spotting, Alz-50 was found to bind to a number of fragments from the somatostatin precursor, of which somatostatin15–28 stained best. Preadsorption of Alz-50 by somatostatin15–28, as well as other specificity tests, failed, however, to provide any clue to the nature of the unknown compound(s) stained in the control hypothalamus. 相似文献
7.
Limited-field-of-view radio-frequency receiver antennas provide improved near-field sensitivity for magnetic resonance imaging by decreasing the antenna volume. The Helmholtz-type surface coil, consisting of two flat rings, is an organ-encompassing antenna that takes advantage of this principle to yield an improved signal-to-noise ratio (S/N). The coil was tested in a group of 50 patients and 16 healthy volunteers. Images obtained with the Helmholtz coil demonstrated quantitatively superior S/N of 2.2-fold or greater than that of comparison body coil images, as well as qualitatively superior anatomic resolution. 相似文献
8.
Marie-Christine J. Plat Monique H. W. Frings-Dresen Judith K. Sluiter 《International archives of occupational and environmental health》2010,83(7):725-731
Purpose
A new job-specific test for fire fighters, the stair-climb test (FFstair-climb) was evaluated for reproducibility and validity for use in future workers’ health surveillance. 相似文献9.
10.
Genotype-phenotype correlation for nucleotide substitutions in the IgII- IgIII linker of FGFR2 总被引:6,自引:3,他引:3