全文获取类型
| 收费全文 | 3632132篇 |
| 免费 | 272772篇 |
| 国内免费 | 7974篇 |
学科分类
| 医药卫生 | 3912878篇 |
出版年
| 2021年 | 29223篇 |
| 2019年 | 29235篇 |
| 2018年 | 40865篇 |
| 2017年 | 31131篇 |
| 2016年 | 35080篇 |
| 2015年 | 40582篇 |
| 2014年 | 56582篇 |
| 2013年 | 83474篇 |
| 2012年 | 114614篇 |
| 2011年 | 120214篇 |
| 2010年 | 71274篇 |
| 2009年 | 66687篇 |
| 2008年 | 111052篇 |
| 2007年 | 117701篇 |
| 2006年 | 117976篇 |
| 2005年 | 114412篇 |
| 2004年 | 109637篇 |
| 2003年 | 104648篇 |
| 2002年 | 101862篇 |
| 2001年 | 167775篇 |
| 2000年 | 172921篇 |
| 1999年 | 145733篇 |
| 1998年 | 41849篇 |
| 1997年 | 37226篇 |
| 1996年 | 36851篇 |
| 1995年 | 35599篇 |
| 1994年 | 33201篇 |
| 1993年 | 30734篇 |
| 1992年 | 115293篇 |
| 1991年 | 111650篇 |
| 1990年 | 107682篇 |
| 1989年 | 104019篇 |
| 1988年 | 96065篇 |
| 1987年 | 94347篇 |
| 1986年 | 89224篇 |
| 1985年 | 85095篇 |
| 1984年 | 64071篇 |
| 1983年 | 54626篇 |
| 1982年 | 32419篇 |
| 1979年 | 59000篇 |
| 1978年 | 41233篇 |
| 1977年 | 35066篇 |
| 1976年 | 32811篇 |
| 1975年 | 34615篇 |
| 1974年 | 42580篇 |
| 1973年 | 40622篇 |
| 1972年 | 38019篇 |
| 1971年 | 35080篇 |
| 1970年 | 32969篇 |
| 1969年 | 30662篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
3.
Methicillin‐resistant Staphylococcus aureus eradication in young infants should include the diaper area and treat housing contacts 
下载免费PDF全文
下载免费PDF全文 4.
5.
6.
M. R. D. Maslin S. K. Lloyd S. Rutherford S. Freeman A. King D. R. Moore K. J. Munro 《Journal of the Association for Research in Otolaryngology》2015,16(5):631-640
Individuals with sudden unilateral deafness offer a unique opportunity to study plasticity of the binaural auditory system in adult humans. Stimulation of the intact ear results in increased activity in the auditory cortex. However, there are no reports of changes at sub-cortical levels in humans. Therefore, the aim of the present study was to investigate changes in sub-cortical activity immediately before and after the onset of surgically induced unilateral deafness in adult humans. Click-evoked auditory brainstem responses (ABRs) to stimulation of the healthy ear were recorded from ten adults during the course of translabyrinthine surgery for the removal of a unilateral acoustic neuroma. This surgical technique always results in abrupt deafferentation of the affected ear. The results revealed a rapid (within minutes) reduction in latency of wave V (mean pre = 6.55 ms; mean post = 6.15 ms; p < 0.001). A latency reduction was also observed for wave III (mean pre = 4.40 ms; mean post = 4.13 ms; p < 0.001). These reductions in response latency are consistent with functional changes including disinhibition or/and more rapid intra-cellular signalling affecting binaurally sensitive neurons in the central auditory system. The results are highly relevant for improved understanding of putative physiological mechanisms underlying perceptual disorders such as tinnitus and hyperacusis. 相似文献
7.
Stelter K. Theodoraki M. N. Becker S. Tsekmistrenko V. Olzowy B. Ledderose G. 《European archives of oto-rhino-laryngology》2015,272(3):639-639
European Archives of Oto-Rhino-Laryngology - 相似文献
8.
Rosario Gulias-Cañizo Anell Lagunes-Guillén Arturo González-Robles Erika Sánchez-Guzmán Federico Castro-Muñozledo 《Burns : journal of the International Society for Burn Injuries》2019,45(2):398-412
Background
Since recent reports have shown that (-)-Epigallocatechin-3-gallate (EGCG) could be used for treating proliferative and inflammatory disorders, we explored its use for the management of corneal chemical burns.Materials and methods
Initially, EGCG was assayed on the rabbit corneal epithelial cell line RCE1(5T5) to establish the best testing conditions, and to avoid unwanted outcomes in the experimental animals. Then, we studied its effects on cell proliferation, cell cycle progression and cell differentiation. Afterwards, we instilled EGCG in experimental grade II corneal alkali burns in mice, three times a day up to 21 days, and evaluated by slit lamp examination and histological sections of corneal epithelial, corneal endothelial and stromal edema, as well as the presence of inflammatory cells and neovascularization.Results
EGCG reduced cell growth and led to a decline in the proportion of proliferative cells in a concentration dependent manner. At 10 μM, EGCG promoted cell differentiation, an effect not related with apoptosis or cytotoxicity. When 10 μM EGCG was instilled in corneal alkali burns in mice three times a day up to 21 days, EGCG significantly reduced corneal opacity and neovascularization. The improved clinical appearance of the cornea was associated to a controlled epithelial growth; epithelial morphology was similar to that observed in normal epithelium and contrasted with the hyperproliferative, desquamating epithelium observed in control burn wounds. EGCG reduced corneal, stromal and endothelial edema, and wound inflammation.Conclusion
This work constitutes the first evidence for the use of EGCG in the acute phase of a corneal alkali burn, representing a possible novel alternative to improve patient outcomes as an add-on therapy. 相似文献9.
10.
Accuracy and Precision of Acetabular Component Placement With Imageless Navigation in Obese Patients
Leonard T. Buller Alexander S. McLawhorn Jose A. Romero Peter K. Sculco David J. Mayman 《The Journal of arthroplasty》2019,34(4):693-699
