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   515240篇
  免费   34086篇
  国内免费   624篇
耳鼻咽喉   6904篇
儿科学   16885篇
妇产科学   13653篇
基础医学   85295篇
口腔科学   14498篇
临床医学   44484篇
内科学   93985篇
皮肤病学   12184篇
神经病学   36333篇
特种医学   18491篇
外国民族医学   64篇
外科学   77381篇
综合类   8480篇
一般理论   119篇
预防医学   39155篇
眼科学   12185篇
药学   40674篇
中国医学   1007篇
肿瘤学   28173篇
  2018年   4995篇
  2015年   4549篇
  2014年   6109篇
  2013年   9636篇
  2012年   12973篇
  2011年   14383篇
  2010年   8381篇
  2009年   7833篇
  2008年   13794篇
  2007年   14787篇
  2006年   15059篇
  2005年   14440篇
  2004年   14126篇
  2003年   13459篇
  2002年   13341篇
  2001年   24123篇
  2000年   25149篇
  1999年   20610篇
  1998年   5433篇
  1997年   4710篇
  1996年   5050篇
  1995年   4632篇
  1994年   4330篇
  1993年   4143篇
  1992年   15754篇
  1991年   16338篇
  1990年   16449篇
  1989年   15820篇
  1988年   14599篇
  1987年   14433篇
  1986年   13617篇
  1985年   13001篇
  1984年   9643篇
  1983年   8260篇
  1982年   4568篇
  1981年   4231篇
  1979年   9423篇
  1978年   6860篇
  1977年   5777篇
  1976年   5604篇
  1975年   6404篇
  1974年   7650篇
  1973年   7143篇
  1972年   6964篇
  1971年   6688篇
  1970年   6176篇
  1969年   5891篇
  1968年   5560篇
  1967年   5014篇
  1966年   4453篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
2.
3.
4.
5.
6.
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   
7.

Background

There are well-established relationships between health and homelessness, and shelters can facilitate the transmission of diseases and contribute to their prevention. Adequate environmental health conditions and hygiene behaviors in homeless shelters are fundamental to the health of their clients, a marginalized population. We report the status of environmental health conditions and hygiene behaviors in homeless shelters and associated health outcomes; interventions to improve these conditions, behaviors, and outcomes; and obstacles to improvement.

Methods

PubMed, Web of Science, Scopus, and EBSCOhost were searched for peer-reviewed studies, and additional sources for grey literature. Studies were included if they reported primary data on one or more environmental health condition or hygiene behavior in homeless shelters.

Results

Twenty-eight studies were included in the review. Insufficient ventilation systems, unhygienic bedding, and overcrowding were the most documented environmental health and hygiene deficiencies in homeless shelters, and tuberculosis infections and skin diseases were the most documented associated health outcomes among clients. Studies frequently recommended or described implementation of behavioral and administrative controls, ventilation system improvements, and ultraviolet germicidal irradiation fixtures.

Discussion

Most studies addressed airborne transmission of tuberculosis and were conducted in high-income countries, revealing an imbalance in the literature. Insufficient resources and the transience of clients are barriers to improving hygiene behaviors and environmental conditions in homeless shelters. Further investment and research into ensuring adequate hygiene and environmental health in this setting can protect and promote the health and well-being of people experiencing homelessness.  相似文献   
8.
9.
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   
10.
Erosive pustular dermatosis of the scalp (EPDS) is an uncommon chronic inflammatory response to scalp trauma that usually resolves with cicatricial alopecia. It most commonly affects elderly patients with a history of actinic damage. Herein, we describe a 16‐year‐old girl with acrofacial dysostosis type 1 presenting after surgery with crusting purulent scalp lesions, whose clinical presentation and histopathologic findings were consistent with EPDS. A review of the literature on EPDS in children is also detailed.  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