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   1496186篇
  免费   128008篇
  国内免费   14398篇
耳鼻咽喉   18094篇
儿科学   46084篇
妇产科学   39878篇
基础医学   202577篇
口腔科学   38631篇
临床医学   141842篇
内科学   304294篇
皮肤病学   34066篇
神经病学   121098篇
特种医学   60401篇
外国民族医学   344篇
外科学   226673篇
综合类   50455篇
现状与发展   27篇
一般理论   498篇
预防医学   119912篇
眼科学   32299篇
药学   108895篇
  119篇
中国医学   8277篇
肿瘤学   84128篇
  2021年   15853篇
  2019年   14513篇
  2018年   19012篇
  2017年   15431篇
  2016年   17404篇
  2015年   20699篇
  2014年   28199篇
  2013年   38106篇
  2012年   48603篇
  2011年   52052篇
  2010年   32219篇
  2009年   30156篇
  2008年   45566篇
  2007年   47939篇
  2006年   48856篇
  2005年   47284篇
  2004年   43198篇
  2003年   41710篇
  2002年   38846篇
  2001年   69002篇
  2000年   70915篇
  1999年   59883篇
  1998年   19106篇
  1997年   17287篇
  1996年   17684篇
  1995年   17764篇
  1994年   16402篇
  1993年   15019篇
  1992年   48226篇
  1991年   46703篇
  1990年   44805篇
  1989年   42556篇
  1988年   39395篇
  1987年   38651篇
  1986年   36291篇
  1985年   35026篇
  1984年   26592篇
  1983年   22292篇
  1982年   13964篇
  1981年   12566篇
  1979年   23649篇
  1978年   17136篇
  1977年   14430篇
  1976年   13231篇
  1975年   13777篇
  1974年   16148篇
  1973年   15440篇
  1972年   14200篇
  1971年   13062篇
  1970年   11895篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
Bipolar disorder (BD) is a common psychiatric mood disorder affecting more than 1-2% of the general population of different European countries. Unfortunately, there is no objective laboratory-based test to aid BD diagnosis or monitor its progression, and little is known about the molecular basis of BD. Here, we performed a comparative proteomic study to identify differentially expressed plasma proteins in various BD mood states (depressed BD, manic BD, and euthymic BD) relative to healthy controls. A total of 10 euthymic BD, 20 depressed BD, 15 manic BD, and 20 demographically matched healthy control subjects were recruited. Seven high-abundance proteins were immunodepleted in plasma samples from the 4 experimental groups, which were then subjected to proteome-wide expression profiling by two-dimensional electrophoresis and matrix-assisted laser desorption/ionization-time-of-flight/time-of-flight tandem mass spectrometry. Proteomic results were validated by immunoblotting and bioinformatically analyzed using MetaCore. From a total of 32 proteins identified with 1.5-fold changes in expression compared with healthy controls, 16 proteins were perturbed in BD independent of mood state, while 16 proteins were specifically associated with particular BD mood states. Two mood-independent differential proteins, apolipoprotein (Apo) A1 and Apo L1, suggest that BD pathophysiology may be associated with early perturbations in lipid metabolism. Moreover, down-regulation of one mood-dependent protein, carbonic anhydrase 1 (CA-1), suggests it may be involved in the pathophysiology of depressive episodes in BD. Thus, BD pathophysiology may be associated with early perturbations in lipid metabolism that are independent of mood state, while CA-1 may be involved in the pathophysiology of depressive episodes.  相似文献   
62.
63.
64.
65.
66.
67.
68.
The current situation in which the humanities are disparaged affects all university disciplines, including nursing, in whose historical evolution the humanities have always been present in one form or another. Looking beyond this disrepute, this study proposes that nursing renew its attention to classical philosophy. Specifically, it invites a close reading of Xenophon's Anabasis and Plato's Meno, to get three related goals: to show how the use of ancient texts are very valuable tools for the philosophical initiation of nursing students and can help them reflect on their choice of nursing as a practical activity; to reflect on the problem of virtue and the nature of the good life; and to show how the interaction with ancient texts allows students to reflect on questions and issues of life, theirs and others, that are not open to investigation through a purely scientific method. Consequently, both Anabasis and Meno readings strengthen the intellectual relationship between philosophy and nursing, enabling the latter to delve deeper into the key questions of its own thought as a discipline.  相似文献   
69.
Obesity Surgery - Laparoscopic sleeve gastrectomy (LSG) is increasingly playing a key role in obesity management. Such operations, however, carry complications sometimes including leaks. The...  相似文献   
70.
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective...  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