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   529057篇
  免费   35201篇
  国内免费   636篇
耳鼻咽喉   6965篇
儿科学   17436篇
妇产科学   14082篇
基础医学   86971篇
口腔科学   14700篇
临床医学   46773篇
内科学   96113篇
皮肤病学   12335篇
神经病学   37773篇
特种医学   18770篇
外国民族医学   63篇
外科学   78560篇
综合类   8846篇
一般理论   143篇
预防医学   41492篇
眼科学   12337篇
药学   41576篇
  1篇
中国医学   1027篇
肿瘤学   28931篇
  2018年   5416篇
  2016年   4460篇
  2015年   4930篇
  2014年   6631篇
  2013年   10316篇
  2012年   14132篇
  2011年   15543篇
  2010年   8908篇
  2009年   8316篇
  2008年   14742篇
  2007年   15833篇
  2006年   15961篇
  2005年   15340篇
  2004年   14971篇
  2003年   14243篇
  2002年   14033篇
  2001年   24276篇
  2000年   25225篇
  1999年   20737篇
  1998年   5569篇
  1997年   4806篇
  1996年   5153篇
  1995年   4721篇
  1994年   4405篇
  1992年   15849篇
  1991年   16408篇
  1990年   16508篇
  1989年   15886篇
  1988年   14648篇
  1987年   14483篇
  1986年   13681篇
  1985年   13037篇
  1984年   9677篇
  1983年   8289篇
  1982年   4597篇
  1981年   4275篇
  1979年   9460篇
  1978年   6882篇
  1977年   5789篇
  1976年   5618篇
  1975年   6419篇
  1974年   7658篇
  1973年   7158篇
  1972年   6984篇
  1971年   6728篇
  1970年   6193篇
  1969年   5916篇
  1968年   5575篇
  1967年   5031篇
  1966年   4466篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
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   
4.
5.
6.
7.
8.
9.
10.
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   
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