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   531034篇
  免费   33981篇
  国内免费   816篇
耳鼻咽喉   7135篇
儿科学   17355篇
妇产科学   14626篇
基础医学   87131篇
口腔科学   14869篇
临床医学   45608篇
内科学   96675篇
皮肤病学   12720篇
神经病学   37454篇
特种医学   18892篇
外国民族医学   64篇
外科学   80216篇
综合类   8607篇
一般理论   122篇
预防医学   40423篇
眼科学   12484篇
药学   41611篇
中国医学   1112篇
肿瘤学   28727篇
  2018年   5237篇
  2016年   4389篇
  2015年   4807篇
  2014年   6373篇
  2013年   10079篇
  2012年   13578篇
  2011年   15160篇
  2010年   8782篇
  2009年   8111篇
  2008年   14385篇
  2007年   15469篇
  2006年   15777篇
  2005年   15153篇
  2004年   14819篇
  2003年   14087篇
  2002年   13955篇
  2001年   24519篇
  2000年   25516篇
  1999年   20881篇
  1998年   5583篇
  1997年   4860篇
  1996年   5211篇
  1995年   4821篇
  1994年   4492篇
  1992年   15980篇
  1991年   16545篇
  1990年   16632篇
  1989年   16057篇
  1988年   14795篇
  1987年   14682篇
  1986年   13777篇
  1985年   13230篇
  1984年   9808篇
  1983年   8400篇
  1982年   4743篇
  1981年   4395篇
  1979年   9596篇
  1978年   7006篇
  1977年   5916篇
  1976年   5746篇
  1975年   6551篇
  1974年   7771篇
  1973年   7250篇
  1972年   7045篇
  1971年   6765篇
  1970年   6234篇
  1969年   5964篇
  1968年   5670篇
  1967年   5109篇
  1966年   4539篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.
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   
3.
4.
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   
5.
6.
7.
8.
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   
9.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
10.
The success of sorafenib in prolonging survival of patients with hepatocellular carcinoma (HCC) makes therapeutic inhibition of angiogenesis a component of treatment for HCC. To enhance therapeutic efficacy, overcome drug resistance and reduce toxicity, combination of antiangiogenic agents with chemotherapy, radiotherapy or other targeted agents were evaluated. Nevertheless, the use of antiangiogenic therapy remains suboptimal regarding dosage, schedule and duration of therapy. The issue is further complicated by combination antiangiogenesis to other cytotoxic or biologic agents. There is no way to determine which patients are most likely respond to a given form of antiangiogenic therapy. Activation of alternative pathways associated with disease progression in patients undergoing antiangiogenic therapy has also been recognized. There is increasing importance in identifying, validating and standardizing potential response biomarkers for antiangiogenesis therapy for HCC patients. In this review, biomarkers for antiangiogenesis therapy including systemic, circulating, tissue and imaging ones are summarized. The strength and deficit of circulating and imaging biomarkers were further demonstrated by a series of studies in HCC patients receiving radiotherapy with or without thalidomide.  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