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   772097篇
  免费   45941篇
  国内免费   1586篇
耳鼻咽喉   9433篇
儿科学   23253篇
妇产科学   17018篇
基础医学   124276篇
口腔科学   16814篇
临床医学   73060篇
内科学   146805篇
皮肤病学   15175篇
神经病学   57507篇
特种医学   27807篇
外国民族医学   64篇
外科学   115123篇
综合类   10972篇
现状与发展   2篇
一般理论   418篇
预防医学   59378篇
眼科学   18249篇
药学   57819篇
  7篇
中国医学   1456篇
肿瘤学   44988篇
  2021年   9070篇
  2020年   5473篇
  2019年   8982篇
  2018年   11446篇
  2017年   8422篇
  2016年   9659篇
  2015年   10977篇
  2014年   15405篇
  2013年   21890篇
  2012年   32888篇
  2011年   35580篇
  2010年   20190篇
  2009年   17961篇
  2008年   31748篇
  2007年   34287篇
  2006年   33644篇
  2005年   32932篇
  2004年   31512篇
  2003年   29765篇
  2002年   28340篇
  2001年   24453篇
  2000年   24520篇
  1999年   21152篇
  1998年   8195篇
  1997年   6861篇
  1996年   6503篇
  1995年   6166篇
  1994年   5373篇
  1992年   15631篇
  1991年   16918篇
  1990年   16918篇
  1989年   16572篇
  1988年   15230篇
  1987年   15118篇
  1986年   14079篇
  1985年   13628篇
  1984年   10579篇
  1983年   9085篇
  1982年   5500篇
  1979年   9616篇
  1978年   7113篇
  1977年   5769篇
  1976年   6075篇
  1975年   7067篇
  1974年   7877篇
  1973年   7545篇
  1972年   6934篇
  1971年   6573篇
  1970年   6125篇
  1969年   5638篇
排序方式: 共有10000条查询结果,搜索用时 70 毫秒
11.
12.
13.
14.
15.
16.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
17.
Introduction: The treatment of classical Hodgkin lymphoma (cHL) in children is a story of success. Nowadays, more than 90% of patients are cured and overall survival is nearly 100% at 5 years. Efforts have been made to avoid related effects of therapies; therefore, children are treated using different chemotherapy schemes in comparison with adults.

Areas covered: This review includes a view of the clinical classification and risk assessment in children suffering from HL. The chemotherapy more commonly employed is revisited. The use of PET/CT to evaluate the disease in order to guide therapy is analyzed. New options of chemotherapy and emerging immunotherapy are also included.

Expert opinion: In order to make the right treatment choice, a proper initial assessment of risk is mandatory. The choice of therapy in these kinds of patients must be done according to the experience of the team, and also, the cost and logistics related to the eligible scheme are very important. If possible, efforts must be made to include PET/CT in guiding therapy and avoiding overtreatment and long-term adverse effects in children. New options in immunotherapy are emerging and must be considered with caution in selected patients.  相似文献   

18.
Pharmaceutical Chemistry Journal - An HPLC-MS method for simultaneous quantitative determination of a novel gestagenic pharmaceutical and two of its metabolites in rat and rabbit blood sera was...  相似文献   
19.
Purpose: To use polymerase chain reaction (PCR) and Goldmann-Witmer coefficient (GWC) calculation to diagnose infectious uveitis.

Methods: Prospective cross-sectional study.

Results: Twenty-seven of 106 patients had positive PCR and/or GWC results on aqueous humor (AH) sampling and 15 of 27 (55.6%) were HIV-positive. Patients with non-anterior uveitis (NAU) were more likely to be HIV+ (p = 0.005). More than 1 possible pathogen was identified in 9 of 27 patients of whom 7 were HIV+. The final clinical diagnosis was discordant with AH findings in 9 of 27 cases. A positive EBV PCR result was associated with a discordant diagnosis (p = 0.001). All cases of herpetic anterior uveitis (42.9% HIV+) tested PCR-/GWC+ while all cases of herpetic NAU tested PCR+/GWC- (83.3% HIV+). All rubella virus cases were PCR+/GWC+.

Conclusion: PCR is useful to diagnose herpetic NAU in HIV+ patients while GWC is useful to diagnose herpetic anterior uveitis.  相似文献   

20.
Bulletin of Experimental Biology and Medicine - Ammonium, an end-product of catabolism, in low doses can promote adaptation of metabolic pathways in erythrocytes under conditions of extreme...  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