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   471篇
  免费   31篇
  国内免费   1篇
耳鼻咽喉   3篇
儿科学   17篇
妇产科学   8篇
基础医学   82篇
口腔科学   17篇
临床医学   39篇
内科学   83篇
皮肤病学   13篇
神经病学   23篇
特种医学   31篇
外科学   40篇
综合类   13篇
一般理论   1篇
预防医学   36篇
眼科学   18篇
药学   32篇
  1篇
中国医学   3篇
肿瘤学   43篇
  2024年   1篇
  2023年   5篇
  2022年   13篇
  2021年   26篇
  2020年   16篇
  2019年   24篇
  2018年   21篇
  2017年   10篇
  2016年   12篇
  2015年   11篇
  2014年   23篇
  2013年   19篇
  2012年   37篇
  2011年   41篇
  2010年   16篇
  2009年   22篇
  2008年   30篇
  2007年   26篇
  2006年   30篇
  2005年   17篇
  2004年   23篇
  2003年   15篇
  2002年   22篇
  2001年   4篇
  2000年   3篇
  1999年   1篇
  1998年   1篇
  1997年   2篇
  1996年   1篇
  1995年   2篇
  1993年   1篇
  1991年   2篇
  1990年   1篇
  1989年   1篇
  1988年   2篇
  1987年   3篇
  1984年   2篇
  1982年   1篇
  1981年   1篇
  1978年   2篇
  1977年   1篇
  1976年   2篇
  1970年   2篇
  1967年   1篇
  1966年   2篇
  1959年   2篇
  1946年   1篇
  1945年   1篇
  1928年   1篇
排序方式: 共有503条查询结果,搜索用时 15 毫秒
21.
22.
Large skeletal discrepancies are sometimes only minimised but not eliminated by orthognathic surgeries. Administration of Botox has been advocated as an effective minimally invasive procedure to tackle aesthetic compromises like gummy smile and the like. This article elaborates on the surgical management of a case of severe vertical maxillary excess with Botox as an adjunct therapy.  相似文献   
23.
24.
25.
In 2008, 65 communicable diseases and conditions were nationally notifiable in Australia. States and territories reported a total of 160,508 notifications of communicable diseases to the National Notifiable Diseases Surveillance System, an increase of 9% on the number of notifications in 2007. In 2008, the most frequently notified diseases were sexually transmissible infections (69,459 notifications, 43% of total notifications), vaccine preventable diseases (34,225 notifications, 21% of total notifications) and gastrointestinal diseases (27,308 notifications, 17% of total notifications). There were 18,207 notifications of bloodborne diseases; 8,876 notifications of vectorborne diseases; 1,796 notifications of other bacterial infections; 633 notifications of zoonoses and 4 notifications of quarantinable diseases.  相似文献   
26.
A cluster of 10 cases of tuberculosis disease (one of them extrapulmonary) occurred from July 2001 until November 2003 in a health district in Southern Austria. Eight patients were culture confirmed and shared an identical strain. One of these eight cases was identified as outbreak-related by molecular strain typing only. Due to public pressure, a further 600 persons received chest X-ray and clinical examinations. Apart from one case which could be excluded from the outbreak because of a different strain pattern, no outbreak-related case of active tuberculosis was detected by this non-targeted procedure. Tuberculin skin testing, not part of the Austrian routine protocol of contact investigation in adults, was initiated after diagnosis of case 8. Forty-nine latently infected contacts were detected. Population-based genotyping of all isolates, prioritization of contact investigations and early use of targeted tuberculin skin testing are critical for effective tuberculosis control in low-incidence countries.  相似文献   
27.
The hypoxic microenvironment of solid tumors is associated with malignant progression and it renders tumors more resistant to cancer therapies. Endothelial cell damage may occur following hypoxic conditions and lead to dysfunction; however, endothelial cells in tumors survive hypoxic conditions providing nutrients and oxygen to facilitate tumor growth. In this study, we investigated the effects of tumor-conditioned medium on hypoxia-induced changes in endothelial cell growth, migration and survival. Tumor conditioned medium collected from U87 human glioblastoma cells were applied to endothelial cultures in normoxia or hypoxia conditions. Hypoxia caused a reduction in clonogenic cell survival response and an increase of the sub-G1 phase of the cell cycle in endothelial cells. Cell migration was measured by spheroid and wound-induced migration assays and hypoxia compared with normoxia significantly increased the number of migrating endothelial cells. Nuclear staining with Hoechst 33258 and caspase-9 and -3 activation in endothelial cells show that hypoxia-induced apoptosis involves caspase-dependent mechanism. Exposure to hypoxia caused an increase in gene expression of VEGF and VEGFR2 and activities of MMP-2 and MMP-9. Furthermore, hypoxia induced an increase in capillary-like structure formation in endothelial cells seeded into Matrigel. Tumor conditioned medium enhanced survival and rescued endothelial cells from apoptosis induced by hypoxia. These molecular changes in endothelial cells could, in part, contribute to the angiogenic response that occurs during hypoxia-induced angiogenesis in glial tumors.  相似文献   
28.
Mood disorders (unipolar and bipolar disorders) are one of the most distressing and disabling disorders known to man kind. Mood disorders may present as either a depressive phase or manic phase. Chronic mania by definition means presence of manic symptoms in excess of 2 yrs without remission. Chronic mania differs in its psychopathological presentation from the acute mania. Chronic mania also poses a diagnostic and management challenge. Along with the poor response to the treatment these patients are also likely to suffer from severe impairment in the social, familial, interpersonal and occupational functioning. These disturbances may add to the chronicity of the condition. This case underlines the significance of keeping possibility of chronic mania which has been overlooked in the recent literature.  相似文献   
29.
30.
International Journal of Legal Medicine - There are several metric and morphological methods available for sex estimation of skeletal remains, but their reliability and applicability depend on the...  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