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   520541篇
  免费   33907篇
  国内免费   619篇
耳鼻咽喉   6993篇
儿科学   17035篇
妇产科学   13691篇
基础医学   85908篇
口腔科学   14601篇
临床医学   44994篇
内科学   94890篇
皮肤病学   12231篇
神经病学   36891篇
特种医学   18857篇
外国民族医学   63篇
外科学   77891篇
综合类   8597篇
一般理论   123篇
预防医学   39631篇
眼科学   12171篇
药学   40860篇
中国医学   1007篇
肿瘤学   28633篇
  2018年   5020篇
  2015年   4597篇
  2014年   6207篇
  2013年   9737篇
  2012年   13145篇
  2011年   14556篇
  2010年   8475篇
  2009年   7939篇
  2008年   13974篇
  2007年   15000篇
  2006年   15199篇
  2005年   14644篇
  2004年   14311篇
  2003年   13641篇
  2002年   13505篇
  2001年   24283篇
  2000年   25298篇
  1999年   20773篇
  1998年   5498篇
  1997年   4776篇
  1996年   5109篇
  1995年   4675篇
  1994年   4364篇
  1993年   4178篇
  1992年   15857篇
  1991年   16466篇
  1990年   16583篇
  1989年   15947篇
  1988年   14704篇
  1987年   14552篇
  1986年   13721篇
  1985年   13112篇
  1984年   9731篇
  1983年   8337篇
  1982年   4618篇
  1981年   4282篇
  1979年   9500篇
  1978年   6916篇
  1977年   5831篇
  1976年   5659篇
  1975年   6454篇
  1974年   7704篇
  1973年   7197篇
  1972年   7020篇
  1971年   6741篇
  1970年   6216篇
  1969年   5952篇
  1968年   5602篇
  1967年   5047篇
  1966年   4493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