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   1301760篇
  免费   97161篇
  国内免费   1693篇
耳鼻咽喉   16685篇
儿科学   42197篇
妇产科学   35943篇
基础医学   194487篇
口腔科学   35784篇
临床医学   121789篇
内科学   255457篇
皮肤病学   28084篇
神经病学   105495篇
特种医学   48149篇
外国民族医学   270篇
外科学   183305篇
综合类   26176篇
现状与发展   3篇
一般理论   600篇
预防医学   108103篇
眼科学   28613篇
药学   95060篇
  10篇
中国医学   2170篇
肿瘤学   72234篇
  2019年   10803篇
  2018年   14826篇
  2017年   11541篇
  2016年   12467篇
  2015年   14161篇
  2014年   19271篇
  2013年   29516篇
  2012年   40314篇
  2011年   42815篇
  2010年   24456篇
  2009年   23307篇
  2008年   40036篇
  2007年   42779篇
  2006年   42166篇
  2005年   41160篇
  2004年   39480篇
  2003年   37784篇
  2002年   36564篇
  2001年   56926篇
  2000年   58020篇
  1999年   48696篇
  1998年   13645篇
  1997年   12444篇
  1996年   12798篇
  1995年   12080篇
  1994年   11270篇
  1993年   10558篇
  1992年   38427篇
  1991年   37885篇
  1990年   36648篇
  1989年   35442篇
  1988年   32901篇
  1987年   32213篇
  1986年   30700篇
  1985年   28994篇
  1984年   22148篇
  1983年   19326篇
  1982年   11499篇
  1979年   21058篇
  1978年   15488篇
  1977年   12866篇
  1976年   11901篇
  1975年   12868篇
  1974年   15652篇
  1973年   15444篇
  1972年   14554篇
  1971年   13605篇
  1970年   12833篇
  1969年   12108篇
  1968年   11256篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate...  相似文献   
33.
34.
Annals of Nuclear Medicine - The Response Evaluation Criteria In Solid Tumors (RECIST) is the most used radiological method for evaluating response after peptide receptor radionuclide therapy...  相似文献   
35.
36.
37.
DNA methylation at CpG dinucleotides is an important epigenetic regulator common to virtually all mammalian cell types, but recent evidence indicates that during early postnatal development neuronal genomes also accumulate uniquely high levels of two alternative forms of methylation, non-CpG methylation and hydroxymethylation. Here we discuss the distinct landscape of DNA methylation in neurons, how it is established, and how it might affect the binding and function of protein readers of DNA methylation. We review studies of one critical reader of DNA methylation in the brain, the Rett syndrome protein methyl CpG-binding protein 2 (MeCP2), and discuss how differential binding affinity of MeCP2 for non-CpG and hydroxymethylation may affect the function of this methyl-binding protein in the nervous system.  相似文献   
38.
39.
The progress of modern medicine would be impossible without the use of general anesthetics (GAs). Despite advancements in refining anesthesia approaches, the effects of GAs are not fully reversible upon GA withdrawal. Neurocognitive deficiencies attributed to GA exposure may persist in neonates or endure for weeks to years in the elderly. Human studies on the mechanisms of the long-term adverse effects of GAs are needed to improve the safety of general anesthesia but they are hampered not only by ethical limitations specific to human research, but also by a lack of specific biological markers that can be used in human studies to safely and objectively study such effects. The latter can primarily be attributed to an insufficient understanding of the full range of the biological effects induced by GAs and the molecular mechanisms mediating such effects even in rodents, which are far more extensively studied than any other species. Our most recent experimental findings in rodents suggest that GAs may adversely affect many more people than is currently anticipated. Specifically, we have shown that anesthesia with the commonly used GA sevoflurane induces in exposed animals not only neuroendocrine abnormalities (somatic effects), but also epigenetic reprogramming of germ cells (germ cell effects). The latter may pass the neurobehavioral effects of parental sevoflurane exposure to the offspring, who may be affected even at levels of anesthesia that are not harmful to the exposed parents. The large number of patients who require general anesthesia, the even larger number of their future unexposed offspring whose health may be affected, and a growing number of neurodevelopmental disorders of unknown etiology underscore the translational importance of investigating the intergenerational effects of GAs. In this mini review, we discuss emerging experimental findings on neuroendocrine, epigenetic, and intergenerational effects of GAs.  相似文献   
40.
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