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   1686012篇
  免费   134509篇
  国内免费   2788篇
耳鼻咽喉   22902篇
儿科学   55413篇
妇产科学   48398篇
基础医学   239032篇
口腔科学   49490篇
临床医学   146196篇
内科学   333978篇
皮肤病学   36504篇
神经病学   136796篇
特种医学   66447篇
外国民族医学   476篇
外科学   254012篇
综合类   40101篇
现状与发展   3篇
一般理论   571篇
预防医学   132663篇
眼科学   38443篇
药学   127571篇
  3篇
中国医学   3214篇
肿瘤学   91096篇
  2018年   17635篇
  2016年   14533篇
  2015年   16911篇
  2014年   22721篇
  2013年   34711篇
  2012年   48258篇
  2011年   50501篇
  2010年   29336篇
  2009年   27476篇
  2008年   47738篇
  2007年   50306篇
  2006年   50879篇
  2005年   49509篇
  2004年   48511篇
  2003年   46198篇
  2002年   45143篇
  2001年   77867篇
  2000年   80659篇
  1999年   68254篇
  1998年   18113篇
  1997年   16583篇
  1996年   16577篇
  1995年   16243篇
  1994年   15240篇
  1993年   14360篇
  1992年   56360篇
  1991年   54627篇
  1990年   53374篇
  1989年   51560篇
  1988年   47919篇
  1987年   47257篇
  1986年   44934篇
  1985年   43452篇
  1984年   32505篇
  1983年   27943篇
  1982年   16315篇
  1981年   14610篇
  1980年   13717篇
  1979年   30943篇
  1978年   21359篇
  1977年   18009篇
  1976年   16965篇
  1975年   17856篇
  1974年   21939篇
  1973年   21076篇
  1972年   19224篇
  1971年   18117篇
  1970年   16685篇
  1969年   15638篇
  1968年   14298篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
European Journal of Clinical Microbiology & Infectious Diseases - We compared the performance of an in-house-developed flow cytometry assay for intracellular cytokine staining (FC-ICS) and a...  相似文献   
102.
103.

Background

The ZOE-50 (NCT01165177) and ZOE-70 (NCT01165229) phase 3 clinical trials showed that the adjuvanted recombinant zoster vaccine (RZV) was ≥90% efficacious in preventing herpes zoster in adults. Here we present a comprehensive overview of the safety data from these studies.

Methods

Adults aged ≥50 (ZOE-50) and ≥70 (ZOE-70) years were randomly vaccinated with RZV or placebo. Safety analyses were performed on the pooled total vaccinated cohort, consisting of participants receiving at least one dose of RZV or placebo. Solicited and unsolicited adverse events (AEs) were collected for 7 and 30?days after each vaccination, respectively. Serious AEs (SAEs) were collected from the first vaccination until 12?months post-last dose. Fatal AEs, vaccination-related SAEs, and potential immune-mediated diseases (pIMDs) were collected during the entire study period.

Results

Safety was evaluated in 14,645 RZV and 14,660 placebo recipients. More RZV than placebo recipients reported unsolicited AEs (50.5% versus 32.0%); the difference was driven by transient injection site and solicited systemic reactions that were generally seen in the first week post-vaccination. The occurrence of overall SAEs (RZV: 10.1%; Placebo: 10.4%), fatal AEs (RZV: 4.3%; Placebo: 4.6%), and pIMDs (RZV: 1.2%; Placebo: 1.4%) was balanced between groups. The occurrence of possible exacerbations of pIMDs was rare and similar between groups. Overall, except for the expected local and systemic symptoms, the safety results were comparable between the RZV and Placebo groups irrespective of participant age, gender, or race.

Conclusions

No safety concerns arose, supporting the favorable benefit-risk profile of RZV.  相似文献   
104.
Canadian Journal of Anesthesia/Journal canadien d'anesthésie -  相似文献   
105.
Tarentola annularis is a climbing gecko with a wide distribution in Africa north of the equator. In the present paper, we describe the development of the osteocranium of this lizard, from the first appearance of the cranial elements up to the point of hatching. This is based on a combination of histology and cleared and stained specimens. This is the first comprehensive account of gekkotan pre-hatching skull development based on a comprehensive series of embryos, rather than a few selected stages. Given that Gekkota is now widely regarded as representing the sister group to other squamates, this account helps to fill a significant gap in the literature. Moreover, as many authors have considered features of the gekkotan skull and skeleton to be indicative of paedomorphosis, it is important to know whether this hypothesis is supported by delays in the onset of cranial ossification. In fact, we found the sequence of cranial bone ossification to be broadly comparable to that of other squamates studied to date, with no significant lags in development.  相似文献   
106.
107.
108.
109.
110.
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