首页 | 官方网站   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   183篇
  免费   6篇
  国内免费   3篇
医药卫生   192篇
  2022年   1篇
  2021年   4篇
  2020年   4篇
  2019年   1篇
  2018年   1篇
  2017年   4篇
  2016年   6篇
  2015年   8篇
  2014年   10篇
  2013年   8篇
  2012年   16篇
  2011年   15篇
  2010年   10篇
  2009年   9篇
  2008年   6篇
  2007年   8篇
  2006年   7篇
  2005年   1篇
  2004年   6篇
  2003年   4篇
  2001年   1篇
  2000年   3篇
  1999年   3篇
  1998年   2篇
  1997年   4篇
  1996年   10篇
  1994年   3篇
  1993年   1篇
  1991年   2篇
  1990年   2篇
  1989年   2篇
  1988年   3篇
  1987年   4篇
  1986年   4篇
  1985年   4篇
  1982年   6篇
  1980年   2篇
  1979年   1篇
  1978年   2篇
  1976年   1篇
  1973年   1篇
  1967年   1篇
  1966年   1篇
排序方式: 共有192条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
Thrombosis of the cerebral dural sinuses and veins has been described since the early 19th century.1,2 Clinically the process is characterised by diverse symptomatology and physical findings and in spite of advances in diagnostic radiological techniques it remains an under-recognised condition. It has been most commonly associated with sepsis, trauma, pregnancy, the puerperium and many other hypercoagulable states. We describe an apparently unique case of sagittal sinus thrombosis occurring during an ectopic pregnancy. This was subsequently complicated by intracranial hypertension in spite of clinical improvement and magnetic resonance imaging (MRI) evidence suggesting a return of venous patency. The clinical presentation, radiological features and management is discussed.  相似文献   
66.
67.
68.
The presence of circulating immune complexes (CICs) is a characteristic feature of human lymphatic filariasis. However, the role of CICs in modulating granulocyte function and complement functional activity in filarial infection is unknown. The levels of CICs in association with complement activation in clinically asymptomatic, filarial-infected patients (INF); filarial-infected patients with overt lymphatic pathologic changes (CPDT); and uninfected controls (EN) were examined. Significantly increased levels of CICs and enhanced functional efficiency of the classical and mannose-binding lectin pathways of the complement system was observed in INF compared with CPDT and EN. Polyethylene glycol-precipitated CICs from INF and CPDT induced significantly increased granulocyte activation compared with those from EN, determined by the increased production of neutrophil granular proteins and a variety of pro-inflammatory cytokines. Thus, CIC-mediated enhanced granulocyte activation and modulation of complement function are important features of filarial infection and disease.  相似文献   
69.
70.
The larvicidal activities of methanolic fractions from Adhatoda vasica leaf extracts were investigated against the bancroftian filariasis vector Culex quinquefasciatus and dengue vector Aedes aegypti. The results indicated that the mortality rates was high at 100, 150, 200 and 250 ppm of methanol extract of fractions III with R f value 0.67 and methanol extract of fraction V with R f value 0.64 of A. vasica against all the larval instars of C. quinquefasciatus and A. aegypti. The result of log probit analysis (at 95% confidence level) revealed that lethal concentration, LC50 and LC90 values were 106.13 and 180.6 ppm for fraction III, 110.6 and 170 ppm for fraction V of C. quinquefasciatus. And, the LC50 and LC90 values were 157.5 and 215.5 ppm for fraction III of A. aegypti and 120 and 243.5 ppm for the fraction V of A. aegypti, respectively. All the tested fractions proved to have strong larvicidal activity (doses from 100 to 250 ppm) against C. quinquefasciatus and A. aegypti. In general, second instar was more susceptible than the later instar. The results achieved suggest that, in addition to their ethnopharmacology value, A. vasica may also serve as a natural larvicidal agent.  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-23

京公网安备 11010802026262号