全文获取类型
收费全文 | 3056篇 |
免费 | 213篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 19篇 |
儿科学 | 113篇 |
妇产科学 | 30篇 |
基础医学 | 438篇 |
口腔科学 | 65篇 |
临床医学 | 274篇 |
内科学 | 623篇 |
皮肤病学 | 108篇 |
神经病学 | 107篇 |
特种医学 | 68篇 |
外科学 | 492篇 |
综合类 | 142篇 |
一般理论 | 2篇 |
预防医学 | 257篇 |
眼科学 | 84篇 |
药学 | 290篇 |
中国医学 | 37篇 |
肿瘤学 | 128篇 |
出版年
2023年 | 28篇 |
2022年 | 111篇 |
2021年 | 113篇 |
2020年 | 71篇 |
2019年 | 95篇 |
2018年 | 122篇 |
2017年 | 67篇 |
2016年 | 78篇 |
2015年 | 79篇 |
2014年 | 121篇 |
2013年 | 151篇 |
2012年 | 230篇 |
2011年 | 197篇 |
2010年 | 113篇 |
2009年 | 101篇 |
2008年 | 169篇 |
2007年 | 170篇 |
2006年 | 174篇 |
2005年 | 135篇 |
2004年 | 112篇 |
2003年 | 126篇 |
2002年 | 92篇 |
2001年 | 66篇 |
2000年 | 75篇 |
1999年 | 52篇 |
1998年 | 15篇 |
1997年 | 19篇 |
1996年 | 15篇 |
1995年 | 16篇 |
1994年 | 10篇 |
1993年 | 15篇 |
1992年 | 50篇 |
1991年 | 34篇 |
1990年 | 23篇 |
1989年 | 47篇 |
1988年 | 20篇 |
1987年 | 17篇 |
1986年 | 23篇 |
1985年 | 10篇 |
1984年 | 11篇 |
1983年 | 16篇 |
1981年 | 8篇 |
1980年 | 6篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1976年 | 5篇 |
1975年 | 7篇 |
1973年 | 7篇 |
1966年 | 4篇 |
1943年 | 4篇 |
排序方式: 共有3277条查询结果,搜索用时 15 毫秒
991.
992.
Rafeul Alam M.D. Ph.D. Janina Wyczółkowska Zofia Sułowska 《Inflammation research》1986,18(1-2):163-166
There has been the lack of small animal models for the studies of histamine releasing factor (HRF). We have found that HRF producedin vitro by lymphocytes of asthmatic patients can act independently from the animal species and induces histamine secretion from mouse peritoneal mast cells. We also found, that spleen cells derived from normal as well as from sensitized mice and guinea-pigs are able to generate HRFin vitro, when cultured in suitable conditions. HRF of mouse and guinea-pig origin released histamine from homologous mast cellsin vitro and its activity was enhanced when spleen cell cultures were stimulated with specific antigens or non-specific mitogen.This paper was supported by Polish Academy of Sciences, (Grant no. 10.5). 相似文献
993.
994.
995.
996.
997.
998.
999.
Velmahos GC Spaniolas K Alam HB de Moya M Gervasini A Petrovick L Conn AK 《Journal of the American College of Surgeons》2006,203(5):605-611
BACKGROUND: Falls from a height are a major cause of morbidity and hospital cost. Spinal injury is frequently associated with falls from height, but reliable predictive factors have not been identified. Diagnostic evaluation of the spine is complex and debated. Our objective was to characterize spinal injury after falls from height and identify predictive factors of spinal injuries. STUDY DESIGN: Medical records of patients with falls from height>10 feet admitted in a Level I trauma center during a period of 66 months were reviewed. Univariate and multivariate analyses were performed to identify independent risk factors of spinal injuries. RESULTS: Of 414 patients, 127 (31%) suffered 277 spinal injuries. Multiple spinal injuries at different levels were found in 62 (49%) patients; in 19 (15%) spinal injuries were at noncontinuous levels. The only independent predictor of spinal injury was alcohol intoxication (odds ratio=3.305; 95% CI, 1.75-6.242; p<0.001) but the number of intoxicated patients was low and the predictive ability weak. Level of falls from height did not correlate with likelihood of spinal injury. Twenty-four of 107 (22%) patients with spinal injuries and a reliable clinical examination had no symptoms related to the spine; all but 2 had distracting injuries. CONCLUSIONS: Spinal injury is frequent among survivors of falls from height>10 feet. Because of the absence of reliable predictors of spinal injury, the possibility of multiple noncontinuous fractures, and the presence of distracting injuries clouding the clinical presentation, aggressive evaluation of the entire spine is warranted. 相似文献
1000.