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   2421290篇
  免费   174472篇
  国内免费   4513篇
耳鼻咽喉   35720篇
儿科学   78424篇
妇产科学   68274篇
基础医学   341831篇
口腔科学   68933篇
临床医学   209047篇
内科学   476646篇
皮肤病学   53625篇
神经病学   191807篇
特种医学   96907篇
外国民族医学   1083篇
外科学   372596篇
综合类   54012篇
现状与发展   7篇
一般理论   812篇
预防医学   175738篇
眼科学   55910篇
药学   181319篇
  6篇
中国医学   5132篇
肿瘤学   132446篇
  2018年   23506篇
  2016年   20049篇
  2015年   22717篇
  2014年   31632篇
  2013年   48445篇
  2012年   65207篇
  2011年   69083篇
  2010年   41496篇
  2009年   39676篇
  2008年   66016篇
  2007年   71331篇
  2006年   71829篇
  2005年   69763篇
  2004年   68233篇
  2003年   65963篇
  2002年   64888篇
  2001年   114771篇
  2000年   118644篇
  1999年   100746篇
  1998年   27512篇
  1997年   24797篇
  1996年   24608篇
  1995年   23312篇
  1994年   21879篇
  1993年   20429篇
  1992年   78947篇
  1991年   76870篇
  1990年   75037篇
  1989年   72555篇
  1988年   67203篇
  1987年   66246篇
  1986年   62643篇
  1985年   59696篇
  1984年   44759篇
  1983年   37936篇
  1982年   22395篇
  1981年   20414篇
  1979年   41704篇
  1978年   29285篇
  1977年   25221篇
  1976年   23150篇
  1975年   25875篇
  1974年   30450篇
  1973年   29407篇
  1972年   27801篇
  1971年   25670篇
  1970年   24290篇
  1969年   22862篇
  1968年   21169篇
  1967年   19024篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
BackgroundThe aim of this study was to estimate the prevalence of dental prosthetic treatment and to investigate the demographic, social, economic and medical factors associated with the use of fixed and removable dentures in a representative sample of adults living in France.MethodsThe data were obtained from the 2002–2003 Decennial Health Survey, a cross-sectional study of a representative sample of the population living in France, which included 29,679 adults. Information was collected by interview. The variables collected were fixed denture, removable denture, age, gender, number of children, area of residence, nationality, educational attainment, family social status, employment status, annual household income per capita, supplementary insurance, chronic disease, eyesight problems/glasses, hearing problems/hearing aids. Multinomial logistic regression models were used to study the relationship between prosthetic treatment and demographic, socioeconomic and medical characteristics unadjusted, adjusted for age and adjusted for all the characteristics.ResultsThe prevalence of prosthetic treatment was 34.6% (95% confidence interval (CI): [34.1; 35.2]) for fixed prosthetic dentures and 13.8% (95% CI: [13.4; 14.2]) for removable prosthetic dentures. We showed a gradient between educational attainment and removable dentures; the odds ratio adjusted for all the variables (aOR) associated with no or primary education compared to post-secondary education was 2.56; 95% CI: [2.09; 3.13]. When annual household income per capita was low, subjects were less likely to report fixed dentures (aOR = 0.68; 95% CI: [0.62; 0.75]) than those with high annual household income per capita. Individuals without insurance less often reported fixed dentures than those with private insurance. Those reporting chronic disease were less likely to report fixed dentures (aOR = 0.87; 95% CI: [0.79; 0.95]) but more likely to report removable dentures (aOR = 1.29; 95% CI: [1.17; 1.43]) than those without chronic disease.ConclusionThis study reveals social, economic and medical inequalities in fixed and removable prosthetic treatment among adults in France.  相似文献   
4.
5.
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   

6.
7.
8.
9.
10.
Dosage form is a mean used for the delivery of drug to a living body. In order to get the desired effect the drug should be delivered to its site of action at such rate and concentration to achieve the maximum therapeutic effect and minimum adverse effect. Since oral route is still widely accepted route but having a common drawback of difficulty in swallowing of tablets and capsules. Therefore a lot of research has been done on novel drug delivery systems. This review is about oral dispersible tablets a novel approach in drug delivery systems that are now a day''s more focused in formulation world, and laid a new path that, helped the patients to build their compliance level with the therapy, also reduced the cost and ease the administration especially in case of pediatrics and geriatrics. Quick absorption, rapid onset of action and reduction in drug loss properties are the basic advantages of this dosage form.  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