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   4844494篇
  免费   392673篇
  国内免费   15769篇
耳鼻咽喉   69317篇
儿科学   152994篇
妇产科学   129398篇
基础医学   729726篇
口腔科学   137300篇
临床医学   446804篇
内科学   881284篇
皮肤病学   114202篇
神经病学   409180篇
特种医学   191569篇
外国民族医学   1127篇
外科学   728981篇
综合类   139960篇
现状与发展   24篇
一般理论   2860篇
预防医学   412266篇
眼科学   115378篇
药学   344119篇
  25篇
中国医学   12394篇
肿瘤学   234028篇
  2021年   56188篇
  2019年   58916篇
  2018年   74921篇
  2017年   57019篇
  2016年   63371篇
  2015年   76125篇
  2014年   110975篇
  2013年   176403篇
  2012年   135313篇
  2011年   142153篇
  2010年   128451篇
  2009年   129496篇
  2008年   128838篇
  2007年   138230篇
  2006年   145720篇
  2005年   141050篇
  2004年   141308篇
  2003年   131459篇
  2002年   121822篇
  2001年   180986篇
  2000年   178028篇
  1999年   161795篇
  1998年   74385篇
  1997年   69867篇
  1996年   67998篇
  1995年   63648篇
  1994年   57857篇
  1993年   53628篇
  1992年   121836篇
  1991年   117474篇
  1990年   112430篇
  1989年   109306篇
  1988年   101761篇
  1987年   99903篇
  1986年   95050篇
  1985年   92521篇
  1984年   76336篇
  1983年   67786篇
  1982年   51715篇
  1981年   48009篇
  1980年   45132篇
  1979年   68845篇
  1978年   54433篇
  1977年   47539篇
  1976年   44322篇
  1975年   44654篇
  1974年   51148篇
  1973年   49323篇
  1972年   46531篇
  1971年   42948篇
排序方式: 共有10000条查询结果,搜索用时 390 毫秒
111.
112.
113.
Introduction: Pharmacovigilance is essential to monitoring the safety profiles of authorized medicines. Compared with small-molecule drugs, biological drugs are more complex, more susceptible to structural variability due to manufacturing processes, and have the potential to induce immune-related reactions, underscoring the importance of safety monitoring for these products. Although highly similar to reference products, biosimilars are not expected to be structurally identical. For these reasons, proper reporting of potential adverse drug reactions (ADRs) using distinguishable names and batch numbers is essential for accurate tracing of all biological drugs. To address the need for robust pharmacovigilance, the European Parliament and Council of the European Union provided legislation regarding pharmacovigilance of biologics in 2010.

Areas covered: This narrative review examines the current state of pharmacovigilance for biologics in the European Union (EU) and discusses relevant information on pharmacovigilance of biosimilars, the current EU pharmacovigilance system, and areas that could be improved.

Expert opinion: Although steps have been taken to improve pharmacovigilance of biologics in the EU, several enhancements can still be made, including additional training for healthcare professionals on ADR reporting, the use of 2D barcodes that enhance traceability, and an open discussion of potentially missed opportunities in the pharmacovigilance of biosimilars.  相似文献   

114.
ABSTRACT

This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities.  相似文献   
115.
116.
117.
118.
119.
120.
Background: Traumatic brain injury (TBI) results in verbal recall deficits and impaired processing of emotion encoded in facial appearance, prosody and the linguistic content of messages. Emotion facilitates memory (emotional memory advantage) for non-brain injured (NBI) individuals but the impact of emotion on verbal recall for linguistically encoded stimuli in TBI has not been explored.

Aims: The purpose of this study was to determine the effects of stimulus emotional content on verbal recall of words and paragraphs in TBI compared to NBI individuals.

Methods and procedures: Six 10-item lists, each with five emotional and five neutral words, and six paragraphs (three emotional, three neutral) were counterbalanced and presented in random order to 20 individuals with TBI and 44 NBI. The number of words from lists and the number of content units from paragraphs were compared for the two groups.

Outcomes and results: The NBI participants recalled more words from the lists and content units from the paragraphs than the individuals with TBI. Both groups recalled significantly more emotional than neutral words. NBI but not TBI participants had significantly greater recall for information in paragraphs with emotional content.

Conclusions: Participants with TBI showed impaired recall of words and paragraph content. Emotion facilitated word and paragraph content recall for neurotypical individuals but emotional memory advantage was limited to words for the TBI 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