全文获取类型
收费全文 | 601篇 |
免费 | 28篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 7篇 |
妇产科学 | 6篇 |
基础医学 | 75篇 |
口腔科学 | 6篇 |
临床医学 | 58篇 |
内科学 | 108篇 |
皮肤病学 | 9篇 |
神经病学 | 20篇 |
特种医学 | 158篇 |
外科学 | 82篇 |
综合类 | 2篇 |
预防医学 | 25篇 |
眼科学 | 6篇 |
药学 | 49篇 |
肿瘤学 | 23篇 |
出版年
2022年 | 5篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 15篇 |
2017年 | 11篇 |
2016年 | 7篇 |
2015年 | 9篇 |
2014年 | 7篇 |
2013年 | 18篇 |
2012年 | 20篇 |
2011年 | 33篇 |
2010年 | 12篇 |
2009年 | 23篇 |
2008年 | 27篇 |
2007年 | 25篇 |
2006年 | 22篇 |
2005年 | 15篇 |
2004年 | 16篇 |
2003年 | 9篇 |
2002年 | 10篇 |
2001年 | 9篇 |
2000年 | 9篇 |
1999年 | 6篇 |
1998年 | 20篇 |
1997年 | 24篇 |
1996年 | 24篇 |
1995年 | 15篇 |
1994年 | 22篇 |
1993年 | 13篇 |
1992年 | 5篇 |
1991年 | 11篇 |
1990年 | 9篇 |
1989年 | 24篇 |
1988年 | 21篇 |
1987年 | 10篇 |
1986年 | 19篇 |
1985年 | 15篇 |
1984年 | 13篇 |
1983年 | 7篇 |
1982年 | 12篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1968年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有637条查询结果,搜索用时 390 毫秒
1.
Hillmann JS; Mesgarzadeh M; Revesz G; Bonakdarpour A; Clancy M; Betz RR 《Radiology》1987,165(3):769-773
Proximal femoral focal deficiency, an uncommon congenital anomaly, necessitates early radiologic classification for surgical planning and treatment. Objective radiographic criteria, including femoral length index, acetabular depth index, acetabular angle index, and shape of the proximal femur were determined in 49 patients before cartilaginous ossification of the femoral capital epiphysis; final classification was based on follow-up radiographs or findings at arthrography or surgery. These parameters were analyzed to determine the accuracy and contributions of each in classification. Correct classification into one of three groups was possible in 86% of cases with use of three of the parameters: femoral length index, acetabular depth index, and shape of the proximal femur. The acetabular angle was found to contribute insignificantly to classification. Magnetic resonance imaging, used in only one case, depicted the nonossified cartilaginous femoral capital epiphysis, thus obviating the need for invasive diagnostic procedures and facilitating early classification. 相似文献
2.
M Carrara S Zampiron F Capolongo L Cima P Giusti 《European journal of pharmacology》1990,179(3):301-305
The effects of glycine on morphine-induced antinociception were investigated in mice, using a cutaneous thermal test (hot-plate), a visceral chemical test (acetylcholine writhing test), and a locomotor activity test. When glycine (200 mg/kg p.o.) and morphine (5 mg/kg s.c.) were given together during the first 30 min, glycine first antagonized the morphine-induced antinociception then this was followed by a synergistic effect. The two-phase influence of glycine on morphine-induced antinociception may be due to the interaction of glycine with different receptors. 相似文献
3.
4.
5.
6.
7.
Life expectancy in British Marfan syndrome populations 总被引:2,自引:0,他引:2
JR Gray AB Bridges RR West L. McLeish AG Stuart JCS Dean MEM Porteous M. Boxer SJ Davies 《Clinical genetics》1998,54(2):124-128
A total of 206 patients with Marfan syndrome were ascertained throughout genetic clinics in Wales and Scotland during the period 1970–1990. There were 45 deaths representing 22% of the cohort. Mean age at death was 45.3 ± 16.5 years. 50% median cumulative survival in the total cohort (n = 206) was 53 years for males and 72 years for females. Multivariate analysis confirmed severity as the best independent indicator of survival. These findings and survival curves will assist in the counselling of British families and individuals with Marfan syndrome. 相似文献
8.
9.
10.
Members of the tumor necrosis factor (TNF) superfamily are crucially involved in the regulation of T cell activation, homeostasis and cytotoxicity. In particular, Fas ligand (FasL), expressed by activated T lymphocytes, induces cell-mediated cytotoxicity and may also be responsible for apoptotic suicide. Tight regulation of this death-inducing ligand is a prerequisite for proper immune defense and homeostasis. In this review, we will discuss various aspects of FasL regulation in cell-mediated cytotoxicity, immune homeostasis and the immunopathology of diseases. 相似文献