首页 | 本学科首页   官方微博 | 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   21266篇
  免费   1371篇
  国内免费   89篇
耳鼻咽喉   191篇
儿科学   578篇
妇产科学   412篇
基础医学   2521篇
口腔科学   387篇
临床医学   1775篇
内科学   4465篇
皮肤病学   330篇
神经病学   1122篇
特种医学   587篇
外科学   3702篇
综合类   761篇
一般理论   19篇
预防医学   1657篇
眼科学   587篇
药学   2073篇
中国医学   248篇
肿瘤学   1311篇
  2023年   194篇
  2022年   610篇
  2021年   752篇
  2020年   479篇
  2019年   614篇
  2018年   749篇
  2017年   504篇
  2016年   425篇
  2015年   568篇
  2014年   800篇
  2013年   995篇
  2012年   1492篇
  2011年   1431篇
  2010年   820篇
  2009年   651篇
  2008年   1130篇
  2007年   1131篇
  2006年   1071篇
  2005年   961篇
  2004年   870篇
  2003年   803篇
  2002年   664篇
  2001年   602篇
  2000年   556篇
  1999年   440篇
  1998年   157篇
  1997年   131篇
  1996年   122篇
  1995年   131篇
  1994年   70篇
  1993年   90篇
  1992年   252篇
  1991年   219篇
  1990年   185篇
  1989年   216篇
  1988年   153篇
  1987年   169篇
  1986年   146篇
  1985年   144篇
  1984年   121篇
  1983年   102篇
  1982年   62篇
  1981年   68篇
  1979年   103篇
  1978年   69篇
  1977年   69篇
  1975年   66篇
  1974年   55篇
  1973年   61篇
  1972年   54篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Dosage form is a mean used for the delivery of drug to a living body. In order to get the desired effect the drug should be delivered to its site of action at such rate and concentration to achieve the maximum therapeutic effect and minimum adverse effect. Since oral route is still widely accepted route but having a common drawback of difficulty in swallowing of tablets and capsules. Therefore a lot of research has been done on novel drug delivery systems. This review is about oral dispersible tablets a novel approach in drug delivery systems that are now a day''s more focused in formulation world, and laid a new path that, helped the patients to build their compliance level with the therapy, also reduced the cost and ease the administration especially in case of pediatrics and geriatrics. Quick absorption, rapid onset of action and reduction in drug loss properties are the basic advantages of this dosage form.  相似文献   
3.
4.
5.
6.
7.
AIM: Cardiovascular risk factors can be present in children and young adults. We previously found abnormal microvascular function in children who had glucose intolerance and insulin resistance. The aim of the present study was to investigate whether they also have abnormalities in left ventricular mass (LVM) and arterial stiffness. METHODS: We measured heart dimensions and LVM using echocardiography, and arterial stiffness using pulse wave analysis in 23 children with good glucose handling (postfeeding glucose: 3.9 to 5 mmol/L) and 21 with poor glucose handling (7.7 to 11.4 mmol/L). RESULTS: The time to pulse reflection was slightly shorter in the poorer glucose handlers (mean+/-SD: 143+/-10 vs 153+/-20 ms, P=0.04), suggestive of increased arterial stiffness. Also in this group, there were significant relationships between intraventricular septal thickness, blood pressure and body mass index, but not in the normal glucose handlers. CONCLUSIONS: We have found that normal children who are in the lowest quintile of glucose tolerance in comparison with their peers are exhibiting the first signs of arterial stiffening. In addition, we have seen the beginnings of a relationship between blood pressure, body mass index and left ventricular enlargement in this group. While these changes may not yet be clinically significant, their emergence might be further evidence of early predisposition to cardiovascular disease.  相似文献   
8.
9.
Sonoelasticity imaging of prostate cancer: in vitro results   总被引:2,自引:0,他引:2  
  相似文献   
10.
During almost 12 years of development and clinical trials, diclofenac sodium has been shown to be both effective and safe as a new nonsteroidal antiinflammatory drug (NSAID) for the treatment of rheumatic diseases including ankylosing spondylitis (AS). We compared the safety and efficacy of 75, 100, or 125 mg/day of diclofenac with the same doses of indomethacin in a multicenter, randomized, parallel group trial in patients with AS. A single blind placebo washout period of 2 days to 2 weeks preceded the 13-week double blind treatment period. Both diclofenac and indomethacin produced significant (p less than 0.001) improvement from baseline for all 14 efficacy variables analyzed. There were no significant between treatment differences. Differences favored diclofenac in the frequency and the severity of adverse experiences reported and in the frequency of complaints affecting the central nervous system.  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