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   514978篇
  免费   33288篇
  国内免费   616篇
耳鼻咽喉   6928篇
儿科学   16850篇
妇产科学   13538篇
基础医学   85168篇
口腔科学   14535篇
临床医学   44386篇
内科学   93856篇
皮肤病学   12186篇
神经病学   36267篇
特种医学   18486篇
外国民族医学   63篇
外科学   77115篇
综合类   8471篇
一般理论   118篇
预防医学   39001篇
眼科学   12156篇
药学   40571篇
中国医学   1008篇
肿瘤学   28179篇
  2018年   4938篇
  2015年   4521篇
  2014年   6071篇
  2013年   9572篇
  2012年   12915篇
  2011年   14317篇
  2010年   8326篇
  2009年   7792篇
  2008年   13727篇
  2007年   14734篇
  2006年   14978篇
  2005年   14415篇
  2004年   14096篇
  2003年   13429篇
  2002年   13304篇
  2001年   24105篇
  2000年   25117篇
  1999年   20587篇
  1998年   5439篇
  1997年   4717篇
  1996年   5051篇
  1995年   4637篇
  1994年   4328篇
  1993年   4145篇
  1992年   15747篇
  1991年   16336篇
  1990年   16443篇
  1989年   15803篇
  1988年   14591篇
  1987年   14424篇
  1986年   13614篇
  1985年   12989篇
  1984年   9635篇
  1983年   8252篇
  1982年   4564篇
  1981年   4231篇
  1979年   9433篇
  1978年   6858篇
  1977年   5773篇
  1976年   5603篇
  1975年   6399篇
  1974年   7636篇
  1973年   7132篇
  1972年   6965篇
  1971年   6686篇
  1970年   6178篇
  1969年   5897篇
  1968年   5560篇
  1967年   5016篇
  1966年   4455篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.
3.
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   
4.
5.
6.
7.
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative...  相似文献   
8.
9.
10.
Past research suggests that as many as 50% of onward human immunodeficiency virus (HIV) transmissions occur during acute and recent HIV infection. It is clearly important to develop interventions which focus on this highly infectious stage of HIV infection to prevent further transmission in the risk networks of acutely and recently infected individuals. Project Protect tries to find recently and acutely infected individuals and prevents HIV transmission in their risk networks. Participants are recruited by community health outreach workers at community-based HIV testing sites and drug users' community venues, by coupon referrals and through referrals from AIDS clinics. When a network with acute/recent infection is identified, network members are interviewed about their risky behaviors, network information is collected, and blood is drawn for HIV testing. Participants are also educated and given prevention materials (condoms, syringes, educational materials); HIV-infected participants are referred to AIDS clinics and are assisted with access to care. Community alerts about elevated risk of HIV transmission are distributed within the risk networks of recently infected. Overall, 342 people were recruited to the project and screened for acute/recent HIV infection. Only six index cases of recent infection (2.3% of all people screened) were found through primary screening at voluntary counseling and testing (VCT) sites, but six cases of recent infection were found through contact tracing of these recently infected participants (7% of network members who came to the interview). Combining screening at VCT sites and contact tracing the number of recently infected people we located as compared to VCT screening alone. No adverse events were encountered. These first results provide evidence for the theory behind the intervention, i.e., in the risk networks of recently infected people there are other people with recent HIV infection and they can be successfully located without increasing stigma for project participants.  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