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   6044篇
  免费   275篇
  国内免费   102篇
耳鼻咽喉   65篇
儿科学   71篇
妇产科学   195篇
基础医学   447篇
口腔科学   198篇
临床医学   440篇
内科学   1993篇
皮肤病学   84篇
神经病学   402篇
特种医学   227篇
外科学   1324篇
综合类   27篇
现状与发展   1篇
一般理论   2篇
预防医学   217篇
眼科学   131篇
药学   238篇
中国医学   3篇
肿瘤学   356篇
  2024年   3篇
  2023年   68篇
  2022年   122篇
  2021年   277篇
  2020年   164篇
  2019年   220篇
  2018年   266篇
  2017年   155篇
  2016年   192篇
  2015年   180篇
  2014年   295篇
  2013年   341篇
  2012年   512篇
  2011年   551篇
  2010年   351篇
  2009年   313篇
  2008年   444篇
  2007年   471篇
  2006年   430篇
  2005年   315篇
  2004年   262篇
  2003年   184篇
  2002年   147篇
  2001年   39篇
  2000年   14篇
  1999年   14篇
  1998年   26篇
  1997年   15篇
  1996年   13篇
  1995年   8篇
  1994年   14篇
  1993年   2篇
  1992年   3篇
  1991年   1篇
  1990年   1篇
  1989年   1篇
  1986年   1篇
  1984年   2篇
  1979年   1篇
  1975年   2篇
  1969年   1篇
排序方式: 共有6421条查询结果,搜索用时 390 毫秒
81.
82.
83.
84.
The synthetic AVP analogue 1-desamino-8-d-arginine-vasopressin (dDAVP) is used for treatment of polyuric disorders. Lack of commercially available assays limits the usefulness of dDAVP as a diagnostic tool in the assessment of renal concentrating capacity. We aimed to develop a specific radioimmunoassay (RIA) for determination of plasma dDAVP (pdDAVP) in order to investigate the relationship between pdDAVP levels and urine osmolality (Uosm). Further, we aimed to determine the onset, duration, and maximum concentrating capacity following intravenous (i.v.) bolus dDAVP injection. The dDAVP assay was based on a well-established RIA for measurements of AVP. Fourteen healthy subjects (aged 15–18 years) participated. Blood and urine samples were collected prior to and after i.v. bolus of 0.03?µg/kg dDAVP. Diuresis and Uosm was measured for nine hours following dDAVP administration. PdDAVP and Uosm were analyzed.We established a specific RIA for the measurement of pdDAVP. All subjects reached maximal pdDAVP concentration (Cmax) 30 minutes following infusion, and a rise in Uosm after 60 minutes. Maximal Uosm varied between subjects, with no direct correlation to the achieved pdDAVP levels. We found no significant intra-individual variation between two dDAVP infusions and the effect was reproducible in terms of Cmax and maximal Uosm. We characterized the relationship between pdDAVP and Uosm after dDAVP bolus injection in healthy adolescents using our dDAVP assay. Maximal Uosm achieved correlated with the baseline Uosm levels and seemed unrelated to achieved pdDAVP levels. The urine concentrating response was maintained at least eight hours.  相似文献   
85.

Background

Job burnout is one of the most serious occupational health hazards, especially, among mental health nurses. It has been attributed among others to staff shortages, health service changes, poor morale and insufficient employee participation in decision-making.

Aim

The aim of this study was to measure burnout among mental health nurses, investigate relations between burnout and organizational factors and examine potential predictors of nurses' burnout. Specifically, this study aimed to investigate whether role conflict, role ambiguity, organizational commitment and subsequent job satisfaction could predict each of the three dimensions of burnout.

Design/methodology/approach

During current cross sectional, the survey was administered to 232 mental health nurses, employed in four private psychiatric clinics in the region of Larissa, Thessaly, Greece in May 2015. Our findings were based on the responses to 78 usable questionnaires. Different statistical analyses, such as correlation analyses, regression analyses and analyses of variance were performed in order to explore possible relations.

Findings

High emotional exhaustion (EE) accounted for 53.8% of the sample, while high depersonalization (DP) and high personal accomplishment (PA) accounted for 24.4% and 25.6%, respectively. The best predictors of burnout were found to be role conflict, satisfaction with workload, satisfaction with training, role ambiguity, satisfaction with pay and presence of serious family issues.

Practical implications

These findings have implications for organizational and individual interventions, indicating that mental health nurses' burnout could be reduced, or even prevented by team building strategies, training, application of operation management, clear instructions and psychological support.  相似文献   
86.
87.
Cardiovascular Drugs and Therapy - Sacubitril/valsartan, vericiguat, and the sodium-glucose co-transporter-2 inhibitors (SGLT2i) dapagliflozin and empagliflozin proved effective in phase 3 trials...  相似文献   
88.
Clinical Rheumatology - Systemic sclerosis is a debilitating autoimmune disease with unknown pathogenesis. The clinical phenotype of fibrosis is preceded by vascular and immunologic aberrations....  相似文献   
89.
Heart Failure Reviews - Left ventricular non-compaction cardiomyopathy (LVNC) is a congenital heart disease with autosomal dominant inheritance. This review aims to summarize the existing data...  相似文献   
90.
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