全文获取类型
收费全文 | 328588篇 |
免费 | 11652篇 |
国内免费 | 625篇 |
专业分类
耳鼻咽喉 | 2855篇 |
儿科学 | 10391篇 |
妇产科学 | 5558篇 |
基础医学 | 36873篇 |
口腔科学 | 4889篇 |
临床医学 | 27360篇 |
内科学 | 63356篇 |
皮肤病学 | 3880篇 |
神经病学 | 30545篇 |
特种医学 | 15534篇 |
外国民族医学 | 14篇 |
外科学 | 53125篇 |
综合类 | 4246篇 |
一般理论 | 109篇 |
预防医学 | 29350篇 |
眼科学 | 5982篇 |
药学 | 19289篇 |
中国医学 | 861篇 |
肿瘤学 | 26648篇 |
出版年
2023年 | 886篇 |
2022年 | 1487篇 |
2021年 | 3376篇 |
2020年 | 2084篇 |
2019年 | 3130篇 |
2018年 | 25031篇 |
2017年 | 19732篇 |
2016年 | 22137篇 |
2015年 | 4437篇 |
2014年 | 5827篇 |
2013年 | 7553篇 |
2012年 | 17046篇 |
2011年 | 31342篇 |
2010年 | 24591篇 |
2009年 | 17144篇 |
2008年 | 28639篇 |
2007年 | 31247篇 |
2006年 | 10538篇 |
2005年 | 12153篇 |
2004年 | 12530篇 |
2003年 | 12764篇 |
2002年 | 10609篇 |
2001年 | 2389篇 |
2000年 | 2227篇 |
1999年 | 2274篇 |
1998年 | 2111篇 |
1997年 | 1741篇 |
1996年 | 1416篇 |
1995年 | 1343篇 |
1994年 | 1214篇 |
1993年 | 1071篇 |
1992年 | 1326篇 |
1991年 | 1267篇 |
1990年 | 1149篇 |
1989年 | 1048篇 |
1988年 | 959篇 |
1987年 | 922篇 |
1986年 | 904篇 |
1985年 | 895篇 |
1984年 | 942篇 |
1983年 | 815篇 |
1982年 | 983篇 |
1981年 | 860篇 |
1980年 | 767篇 |
1979年 | 657篇 |
1978年 | 655篇 |
1977年 | 536篇 |
1976年 | 524篇 |
1974年 | 530篇 |
1973年 | 451篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
Sergio Barroilhet Adrián Cano-Prous Salvador Cervera-Enguix Maria João Forjaz Francisco Guillén-Grima 《Social psychiatry and psychiatric epidemiology》2009,44(12):1051-1065
Introduction
This paper presents the results of a study on the psychometric properties of an authorized Spanish version of the McMaster Family Assessment Device, a self-report measure of family functioning. 相似文献84.
85.
86.
Michael Hermansson Anders Ekedahl Jonas Ranstam Thomas Zilling 《BMC gastroenterology》2009,9(1):25-13
Background
Despite a decreasing incidence of peptic ulcer disease, most previous studies report a stabile incidence of ulcer complications. We wanted to investigate the incidence of peptic ulcer complications in Sweden before and after the introduction of the proton pump inhibitors (PPI) in 1988 and compare these data to the sales of non-steroid anti-inflammatory drugs (NSAID) and acetylsalicylic acid (ASA). 相似文献87.
88.
Introduction
Although ependymoma is the third most common pediatric brain tumor, we know little about the genetic/epigenetic basis of its initiation, maintenance, or progression. This is due in part to the heterogeneity of the disease, as well as the small sample size of the cohorts analyzed in most studies. 相似文献89.
Parastoo Jangouk Thomas Dehmel Gerd Meyer Zu Hörste Andreas Ludwig Helmar C. Lehmann Bernd C. Kieseier 《Glia》2009,57(16):1765-1774
The disintegrin and metalloproteinase 10 (ADAM10) is a membrane‐anchored metalloproteinase with both proteolytic and disintegrin characteristics. Here, we investigate the expression, regulation, and functional role of ADAM10 in axonal outgrowth and myelination of the peripheral nerve. Expression pattern analysis of 11 ADAM family members in co‐cultures of rat dorsal root ganglia (DRG) neurons and Schwann cells (SCs) demonstrated the most pronounced mRNA expression for ADAM10. In further studies, ADAM10 was found to be consistently upregulated in DRG‐SC co‐cultures before the induction of myelination. Neurons as well as SCs widely expressed ADAM10 at the protein level. In neurons, the expression of ADAM10 was exclusively limited to the axons before the induction of myelination. Inhibition of ADAM10 activity by the hydroxamate‐based inhibitors GI254023X and GW280264X resulted in a significant decrease in the mean axonal length. These data suggest that ADAM10 represents a prerequisite for myelination, although its activity is not required during the process of myelination itself as demonstrated by expression analysis of myelin protein zero (P0) and Sudan black staining. Hence, during the process of myelin formation, ADAM10 is highly upregulated and appears to be critically involved in axonal outgrowth that is a requirement for myelination in the peripheral nerve. © 2009 Wiley‐Liss, Inc. 相似文献
90.
Thomas R. Russell 《American journal of surgery》2009,197(6):826-827
In recent years, the surgical profession has attempted to incorporate into clinical practice certain techniques that the airline industry has used to improve safety. These mechanisms have proven to be valuable components of our efforts to ensure that surgical patients receive safe, high-quality care. However, as the authors of “Cost and workforce implications of subjecting all physicians to aviation industry work hour restrictions” note, it would be a mistake to extend aviation's work-hour restrictions to medicine, particularly to resident training programs. 相似文献