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   236篇
  免费   5篇
耳鼻咽喉   27篇
儿科学   4篇
妇产科学   7篇
基础医学   12篇
口腔科学   1篇
临床医学   18篇
内科学   61篇
皮肤病学   15篇
神经病学   13篇
外科学   21篇
预防医学   31篇
眼科学   5篇
药学   23篇
肿瘤学   3篇
  2013年   2篇
  2010年   2篇
  2009年   11篇
  2007年   1篇
  2006年   1篇
  2005年   2篇
  2004年   2篇
  2003年   1篇
  2002年   1篇
  2001年   3篇
  2000年   1篇
  1999年   4篇
  1998年   2篇
  1997年   18篇
  1996年   11篇
  1995年   12篇
  1994年   7篇
  1993年   8篇
  1992年   3篇
  1991年   5篇
  1990年   12篇
  1989年   11篇
  1988年   5篇
  1987年   2篇
  1986年   3篇
  1985年   3篇
  1984年   2篇
  1983年   5篇
  1982年   1篇
  1981年   3篇
  1980年   4篇
  1979年   4篇
  1978年   2篇
  1977年   4篇
  1976年   4篇
  1975年   1篇
  1971年   1篇
  1968年   1篇
  1966年   2篇
  1964年   1篇
  1963年   2篇
  1962年   1篇
  1960年   1篇
  1959年   11篇
  1958年   17篇
  1957年   8篇
  1956年   9篇
  1955年   12篇
  1954年   4篇
  1948年   4篇
排序方式: 共有241条查询结果,搜索用时 15 毫秒
31.
Four patients with co-existing vitiligo and morphoea are reported. The significance of this association is discussed.  相似文献   
32.
33.
34.
Red cell superoxide dismutase activity was determined on cord blood samples. The normal range of activity in neonates, measured per gram of haemoglobin, was lower than that obtained for adults, with the mean value for neonates being approximately two-thirds of the adult level. When activity was measured on a per cell basis it was still lower than the adult level. Adult levels are reached at approximately three months postnatal age. No correlation was found between low superoxide dismutase activity and prematurity, low birthweight. Apgar, respiratory distress syndrome, or sex.  相似文献   
35.
Lighting and heating conditions at work may cause subjectiveill health and lead to requests for improvement of these aspectsof the working environment. Self-administration of a semi-structuredquestionnaire can provide a quick and useful method to evaluatealterations which are subsequently made. Requests for reprints should be addressed to: Dr R. Philipp, Department of Community Health, University of Bristol, Canynge Hall, Whiteladies Road, Bristol BS8 2PR.  相似文献   
36.
37.
Experiments using 14C-labelled lignocaine administered by theintravenous regional anaesthetic technique were carried outin dogs in order to determine the site and mode of action oflignocaine used in this way. Preliminary results have showna statistically significant selective pick-up by nerve tissuealthough the actual site of action has not yet been determined.Blood lignocaine levels in the venous outflow of the limb afterremoval of the tourniquet were also determined. The peak levelsrecorded were beneath the concentrations considered to be dangerousin clinical practice.  相似文献   
38.
39.
The magnitude of the alcoholism problem amongst the Britishworkforce has not yet been recognised. The cost to governmentand employers is such that economic self-interest demands thatthe occupational health services devote more attention to detectingand aiding alcoholic employees. Special occupational hazardsand alcoholism-inducing factors are well known, but some companiescontinue to condone practices which encourage heavy drinkingat work. One of the barriers to the development of preventativeand rehabilitation schemes may be that those responsible forthe initiation of such schemes—company directors and doctors—areamongst those with the greatest risk of alcoholism. Various estimates have suggested that there are between 280,000and 350,000 alcoholics in England and Wales.1 2 As some 13.5%of alcoholics are either unemployable or retired, 3 it is reasonableto assume that in the United Kingdom as a whole there must beat least 260,000 alcoholics amongst the male workforce of 16.1million and 40,000 alcoholics in the female workforce of 9.1million. As yet, employers have little appreciation of the magnitudeof the problem. Hawker and her colleagues4 asked 279 Londoncompanies how many alcoholics they believed they employed. Theestimate these companies arrived at was 3.5 per 1,000 malesand 0.09 per 1,00C females, suggesting that at least four-fifthsof alcoholics go undetected at their workplace.  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