全文获取类型
收费全文 | 213624篇 |
免费 | 50593篇 |
国内免费 | 3702篇 |
专业分类
耳鼻咽喉 | 2490篇 |
儿科学 | 7231篇 |
妇产科学 | 3981篇 |
基础医学 | 39265篇 |
口腔科学 | 9248篇 |
临床医学 | 22301篇 |
内科学 | 37381篇 |
皮肤病学 | 6163篇 |
神经病学 | 24467篇 |
特种医学 | 8245篇 |
外国民族医学 | 27篇 |
外科学 | 22138篇 |
综合类 | 15934篇 |
现状与发展 | 16篇 |
一般理论 | 39篇 |
预防医学 | 18209篇 |
眼科学 | 3956篇 |
药学 | 21191篇 |
90篇 | |
中国医学 | 7839篇 |
肿瘤学 | 17708篇 |
出版年
2024年 | 193篇 |
2023年 | 1427篇 |
2022年 | 2475篇 |
2021年 | 5316篇 |
2020年 | 9227篇 |
2019年 | 14402篇 |
2018年 | 13839篇 |
2017年 | 15139篇 |
2016年 | 14327篇 |
2015年 | 14260篇 |
2014年 | 16465篇 |
2013年 | 18897篇 |
2012年 | 15802篇 |
2011年 | 16307篇 |
2010年 | 13876篇 |
2009年 | 10057篇 |
2008年 | 10569篇 |
2007年 | 9158篇 |
2006年 | 8523篇 |
2005年 | 7870篇 |
2004年 | 7294篇 |
2003年 | 6769篇 |
2002年 | 5872篇 |
2001年 | 4868篇 |
2000年 | 3394篇 |
1999年 | 2117篇 |
1998年 | 1767篇 |
1997年 | 1702篇 |
1996年 | 1579篇 |
1995年 | 1512篇 |
1994年 | 1290篇 |
1993年 | 1143篇 |
1992年 | 1045篇 |
1991年 | 942篇 |
1990年 | 837篇 |
1989年 | 763篇 |
1988年 | 601篇 |
1987年 | 495篇 |
1986年 | 518篇 |
1985年 | 810篇 |
1984年 | 735篇 |
1983年 | 474篇 |
1982年 | 595篇 |
1981年 | 476篇 |
1980年 | 450篇 |
1979年 | 319篇 |
1978年 | 289篇 |
1977年 | 234篇 |
1976年 | 226篇 |
1975年 | 154篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
《Health Policy and Technology》2022,11(3):100647
BackgroundUnequal housing access resulted in more than 150 million homeless people worldwide, with millions more expected to be added every year due to the ongoing climate-related crises. Homeless population has a counterproductive effect on the social, psychological integration efforts by the community and exposure to other severe health-related issues. Geographic Information Systems (GIS) have long been applied in urban planning and policy, housing and homelessness, and health-related research.MethodsWe used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method to systematically review 24 articles collected from multiple databases (n = 10) that focused on health-related issues among homeless people and used geospatial analysis techniques in their research.ResultsOur findings indicated a geographic clustering of case study locations– 26 out of the 31 case study sites are from the USA and Canada. Studies used spatial analysis techniques to identify hotspots, clusters and patterns of patient location and population distribution. Studies also reported relationships among the location of homeless shelters and substance use, discarded needles, different infectious and non-infectious disease clusters.ConclusionMost studies were restricted in analyzing and visualizing the patterns and disease clusters; however, geospatial analyses techniques are useful and offer diverse techniques for a more sophisticated understanding of the spatial characteristics of the health issues among homeless people. Better integration of GIS in health research among the homeless would help formulate sensible policies to counter health inequities among this vulnerable population group. 相似文献
102.
103.
104.
105.
106.
107.
108.
109.
Erika Cecon Anna Ivanova Marine Luka Florence Gbahou Anne Friederich Jean‐Luc Guillaume Patrick Keller Klaus Knoch Raise Ahmad Philippe Delagrange Michele Solimena Ralf Jockers 《Journal of pineal research》2019,66(2)
Melatonin receptors play important roles in the regulation of circadian and seasonal rhythms, sleep, retinal functions, the immune system, depression, and type 2 diabetes development. Melatonin receptors are approved drug targets for insomnia, non‐24‐hour sleep‐wake disorders, and major depressive disorders. In mammals, two melatonin receptors (MTRs) exist, MT1 and MT2, belonging to the G protein‐coupled receptor (GPCR) superfamily. Similar to most other GPCRs, reliable antibodies recognizing melatonin receptors proved to be difficult to obtain. Here, we describe the development of the first monoclonal antibodies (mABs) for mouse MT1 and MT2. Purified antibodies were extensively characterized for specific reactivity with mouse, rat, and human MT1 and MT2 by Western blot, immunoprecipitation, immunofluorescence, and proximity ligation assay. Several mABs were specific for either mouse MT1 or MT2. None of the mABs cross‐reacted with rat MTRs, and some were able to react with human MTRs. The specificity of the selected mABs was validated by immunofluorescence microscopy in three established locations (retina, suprachiasmatic nuclei, pituitary gland) for MTR expression in mice using MTR‐KO mice as control. MT2 expression was not detected in mouse insulinoma MIN6 cells or pancreatic beta‐cells. Collectively, we report the first monoclonal antibodies recognizing recombinant and native mouse melatonin receptors that will be valuable tools for future studies. 相似文献
110.