全文获取类型
收费全文 | 4397篇 |
免费 | 316篇 |
国内免费 | 23篇 |
专业分类
耳鼻咽喉 | 43篇 |
儿科学 | 89篇 |
妇产科学 | 84篇 |
基础医学 | 603篇 |
口腔科学 | 39篇 |
临床医学 | 538篇 |
内科学 | 891篇 |
皮肤病学 | 64篇 |
神经病学 | 535篇 |
特种医学 | 142篇 |
外国民族医学 | 2篇 |
外科学 | 770篇 |
综合类 | 37篇 |
一般理论 | 1篇 |
预防医学 | 250篇 |
眼科学 | 31篇 |
药学 | 380篇 |
中国医学 | 6篇 |
肿瘤学 | 231篇 |
出版年
2023年 | 24篇 |
2022年 | 40篇 |
2021年 | 130篇 |
2020年 | 87篇 |
2019年 | 117篇 |
2018年 | 141篇 |
2017年 | 110篇 |
2016年 | 127篇 |
2015年 | 125篇 |
2014年 | 163篇 |
2013年 | 220篇 |
2012年 | 337篇 |
2011年 | 327篇 |
2010年 | 195篇 |
2009年 | 156篇 |
2008年 | 246篇 |
2007年 | 261篇 |
2006年 | 219篇 |
2005年 | 233篇 |
2004年 | 212篇 |
2003年 | 193篇 |
2002年 | 179篇 |
2001年 | 76篇 |
2000年 | 71篇 |
1999年 | 63篇 |
1998年 | 44篇 |
1997年 | 22篇 |
1996年 | 29篇 |
1995年 | 17篇 |
1994年 | 21篇 |
1993年 | 19篇 |
1992年 | 37篇 |
1991年 | 31篇 |
1990年 | 40篇 |
1989年 | 39篇 |
1988年 | 36篇 |
1987年 | 43篇 |
1986年 | 31篇 |
1985年 | 35篇 |
1984年 | 33篇 |
1983年 | 17篇 |
1982年 | 13篇 |
1979年 | 24篇 |
1978年 | 11篇 |
1974年 | 18篇 |
1973年 | 15篇 |
1971年 | 10篇 |
1970年 | 13篇 |
1969年 | 9篇 |
1966年 | 8篇 |
排序方式: 共有4736条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
Andreas Schlitzer Naomi McGovern Pearline Teo Teresa Zelante Koji Atarashi Donovan Low Adrian W.S. Ho Peter See Amanda Shin Pavandip Singh Wasan Guillaume Hoeffel Benoit Malleret Alexander Heiseke Samantha Chew Laura Jardine Harriet A. Purvis Catharien M.U. Hilkens John Tam Florent Ginhoux 《Immunity》2013,38(5):970-983
85.
A cluster‐randomized controlled trial evaluating the effects of delaying onset of adolescent substance abuse on cognitive development and addiction following a selective,personality‐targeted intervention programme: the Co‐Venture trial
下载免费PDF全文
![点击此处可从《Addiction (Abingdon, England)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
86.
Single‐staged vs. two‐staged implant placement in vertically deficient alveolar ridges using bone ring technique ‐ Part 2: implant osseointegration
下载免费PDF全文
![点击此处可从《Clinical oral implants research》网站下载免费的PDF全文](/ch/ext_images/free.gif)
87.
A rapid,high‐throughput screening method for carriage of methicillin‐resistant Staphylococcus aureus
Hege S. Tunsjø Benoit Follin‐Arbelet Nina M. Clausen Yngve Ness Truls M. Leegaard Vahid Bemanian 《APMIS : acta pathologica, microbiologica, et immunologica Scandinavica》2013,121(9):865-870
Rapid screening of methicillin‐resistant Staphylococcus aureus (MRSA) colonization prior to hospital admittance is important to reduce nosocomial infections and health care costs. Molecular detection of mecA and S. aureus specific target genes has become widely established for this purpose. However, there are still limitations in potential for high‐throughput screening in the methods described. We have compared the time aspects and workload of four different DNA preparation platforms, resulting in an automated and simple MRSA screening method which combines two liquid handling systems and a simple lysis buffer. We have further transferred our in‐house dual real‐time PCR to a fast‐PCR protocol, reducing the time and labour spent on these samples to a minimum. 相似文献
88.
89.
Human endogenous retroviruses (ERVs) represent 8% of the total human genome. Although the majority of these ancient proviral sequences have only retained non-coding long terminal repeats (LTRs), a number of “endogenized” retroviral genes encode functional proteins. Previous studies have underlined the implication of these ERV-derived proteins in the development and the function of the placenta. In this review, we summarize recent findings showing that two ERV genes, termed Syncytin-1 and Syncytin-2, which encode former envelope (Env) proteins, trigger fusion events between villous cytotrophoblasts and the peripheral multinucleated syncytiotrophoblast layer. Such fusion events maintain the stability of this latter cell structure, which plays an important role in fetal development by the active secretion of various soluble factors, gas exchange and regulation of fetomaternal immunotolerance. We also highlight new studies showing that these ERV proteins, in addition to their localization at the cell surface of cytotrophoblasts, are also incorporated on the surface of various extracellular microvesicles, including exosomes. Such exosome-associated proteins could be involved in the various functions attributed to these vesicles and could provide a form of tropism. Additionally, through their immunosuppressive domains, these ERV proteins could also contribute to fetomaternal immunotolerance in a local and more distal manner. These various aspects of the implication of Syncytin-1 and -2 in placental function are also addressed in the context of the placenta-related disorder, preeclampsia. 相似文献