首页 | 官方网站   微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   991篇
  免费   42篇
  国内免费   21篇
医药卫生   1054篇
  2023年   3篇
  2021年   14篇
  2020年   7篇
  2019年   5篇
  2018年   5篇
  2017年   11篇
  2016年   10篇
  2015年   14篇
  2014年   19篇
  2013年   34篇
  2012年   25篇
  2011年   33篇
  2010年   42篇
  2009年   45篇
  2008年   28篇
  2007年   40篇
  2006年   30篇
  2005年   36篇
  2004年   38篇
  2003年   33篇
  2002年   22篇
  2001年   25篇
  2000年   16篇
  1999年   24篇
  1998年   43篇
  1997年   45篇
  1996年   40篇
  1995年   31篇
  1994年   17篇
  1993年   22篇
  1992年   17篇
  1991年   19篇
  1990年   24篇
  1989年   20篇
  1988年   32篇
  1987年   24篇
  1986年   21篇
  1985年   26篇
  1984年   11篇
  1983年   14篇
  1982年   18篇
  1981年   6篇
  1980年   11篇
  1979年   5篇
  1978年   10篇
  1977年   6篇
  1976年   8篇
  1975年   6篇
  1972年   6篇
  1967年   2篇
排序方式: 共有1054条查询结果,搜索用时 218 毫秒
81.
82.

Background  

Recent evidence, both animal and human, suggests that modifiable factors during fetal and infant development predispose for cardiovascular disease in adult life and that they may become possible future targets for prevention. One of these factors is maternal psychosocial stress, but so far, few prospective studies have been able to investigate the longer-term effects of stress in detail, i.e. effects in childhood. Therefore, our general aim is to study whether prenatal maternal psychosocial stress is associated with an adverse cardio-metabolic risk profile in the child at age five.  相似文献   
83.
84.
A single photon emission computed tomographic method was designed for the measurement of radiopharmaceutical uptake in brain tumors. Results of phantom studies showed a correlation coefficient of .99 when measured volume was compared with actual volume. The correlation coefficient for measured radioactivity concentration compared with the actual concentration was .97. In 13 meningiomas the correlation between in vivo SPECT measurements of uptake and in vitro measurements in samples of the same tumors removed surgically was .84; when two tumors that contained regions of necrosis and fibrosis were excluded it was .93. This method can be used for in vivo quantitative assessment of pharmacokinetics of labeled drug uptake in human brain tumors.  相似文献   
85.
86.
87.
Although it has been shown that muscle magnetic resonance imaging (MRI) improves the phenotypic characterization of patients with neuromuscular disorders and allows accurate quantification of muscle and adipose tissue distribution, to date quantitative MRI has not been used to assess the therapeutic response in clinical trials of neuromuscular diseases. We discuss quantitative MRI findings after a 6‐month course of enzyme replacement therapy administered to nine patients with adult‐onset glycogenosis II. Muscle Nerve 40: 122–125, 2009  相似文献   
88.
89.
90.
Canthaxanthin induces apoptosis in human cancer cell lines   总被引:3,自引:1,他引:2  
To investigate the possibility that canthaxanthin inhibits cancer cell growth by inducing apoptosis, human WiDr colon adenocarcinoma and SK- MEL-2 melanoma cells were treated with two different doses of the carotenoid for 48 h. Canthaxanthin was incorporated and/or associated to cells. The treatment with the carotenoid caused growth inhibition in both cell types. Concomitantly, apoptosis was induced. Increasing time of exposure and carotenoid concentration, this effect was more pronounced. At 48 h, the percentages of apoptotic cells were 13 and 15, using 1 microM canthaxanthin, and 18 and 20, using 10 microM canthaxanthin in WiDr and SK-MEL-2 cells, respectively. This study represents the first demonstration that canthaxanthin is able to induce apoptosis in tumour cells.   相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号