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   515090篇
  免费   34143篇
  国内免费   619篇
耳鼻咽喉   6903篇
儿科学   16871篇
妇产科学   13579篇
基础医学   85307篇
口腔科学   14535篇
临床医学   44550篇
内科学   93933篇
皮肤病学   12182篇
神经病学   36383篇
特种医学   18519篇
外国民族医学   63篇
外科学   77220篇
综合类   8510篇
一般理论   118篇
预防医学   39121篇
眼科学   12154篇
药学   40686篇
中国医学   1008篇
肿瘤学   28210篇
  2018年   4959篇
  2015年   4545篇
  2014年   6115篇
  2013年   9610篇
  2012年   12946篇
  2011年   14368篇
  2010年   8352篇
  2009年   7811篇
  2008年   13767篇
  2007年   14785篇
  2006年   15012篇
  2005年   14448篇
  2004年   14108篇
  2003年   13440篇
  2002年   13330篇
  2001年   24121篇
  2000年   25152篇
  1999年   20604篇
  1998年   5443篇
  1997年   4723篇
  1996年   5062篇
  1995年   4634篇
  1994年   4331篇
  1993年   4158篇
  1992年   15774篇
  1991年   16345篇
  1990年   16466篇
  1989年   15839篇
  1988年   14604篇
  1987年   14433篇
  1986年   13624篇
  1985年   12997篇
  1984年   9654篇
  1983年   8275篇
  1982年   4576篇
  1981年   4239篇
  1979年   9440篇
  1978年   6867篇
  1977年   5782篇
  1976年   5615篇
  1975年   6414篇
  1974年   7645篇
  1973年   7143篇
  1972年   6979篇
  1971年   6695篇
  1970年   6183篇
  1969年   5899篇
  1968年   5574篇
  1967年   5022篇
  1966年   4456篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Major depressive disorder and other neuropsychiatric disorders are often managed with long-term use of antidepressant medication. Fluoxetine, an SSRI antidepressant, is widely used as a first-line treatment for neuropsychiatric disorders. However, fluoxetine has also been shown to increase the risk of metabolic diseases such as non-alcoholic fatty liver disease. Fluoxetine has been shown to increase hepatic lipid accumulation in vivo and in vitro. In addition, fluoxetine has been shown to alter the production of prostaglandins which have also been implicated in the development of non-alcoholic fatty liver disease. The goal of this study was to assess the effect of fluoxetine exposure on the prostaglandin biosynthetic pathway and lipid accumulation in a hepatic cell line (H4-II-E-C3 cells). Fluoxetine treatment increased mRNA expression of prostaglandin biosynthetic enzymes (Ptgs1, Ptgs2, and Ptgds), PPAR gamma (Pparg), and PPAR gamma downstream targets involved in fatty acid uptake (Cd36, Fatp2, and Fatp5) as well as production of 15-deoxy-Δ12,14PGJ2 a PPAR gamma ligand. The effects of fluoxetine to induce lipid accumulation were attenuated with a PTGS1 specific inhibitor (SC-560), whereas inhibition of PTGS2 had no effect. Moreover, SC-560 attenuated 15-deoxy-Δ12,14PGJ2 production and expression of PPAR gamma downstream target genes. Taken together these results suggest that fluoxetine-induced lipid abnormalities appear to be mediated via PTGS1 and its downstream product 15d-PGJ2 and suggest a novel therapeutic target to prevent some of the adverse effects of fluoxetine treatment.  相似文献   
2.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
3.
4.
5.
6.
7.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
8.
9.
Bulletin of Experimental Biology and Medicine - Ammonium, an end-product of catabolism, in low doses can promote adaptation of metabolic pathways in erythrocytes under conditions of extreme...  相似文献   
10.
Erosive pustular dermatosis of the scalp (EPDS) is an uncommon chronic inflammatory response to scalp trauma that usually resolves with cicatricial alopecia. It most commonly affects elderly patients with a history of actinic damage. Herein, we describe a 16‐year‐old girl with acrofacial dysostosis type 1 presenting after surgery with crusting purulent scalp lesions, whose clinical presentation and histopathologic findings were consistent with EPDS. A review of the literature on EPDS in children is also detailed.  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