全文获取类型
收费全文 | 4473篇 |
免费 | 25篇 |
国内免费 | 44篇 |
专业分类
耳鼻咽喉 | 49篇 |
儿科学 | 1051篇 |
妇产科学 | 30篇 |
基础医学 | 347篇 |
口腔科学 | 20篇 |
临床医学 | 372篇 |
内科学 | 701篇 |
皮肤病学 | 19篇 |
神经病学 | 173篇 |
特种医学 | 174篇 |
外科学 | 598篇 |
综合类 | 106篇 |
预防医学 | 331篇 |
眼科学 | 44篇 |
药学 | 184篇 |
中国医学 | 20篇 |
肿瘤学 | 323篇 |
出版年
2019年 | 88篇 |
2018年 | 181篇 |
2017年 | 176篇 |
2016年 | 177篇 |
2015年 | 46篇 |
2014年 | 71篇 |
2013年 | 73篇 |
2012年 | 217篇 |
2011年 | 1863篇 |
2010年 | 718篇 |
2009年 | 306篇 |
2008年 | 132篇 |
2007年 | 48篇 |
2006年 | 18篇 |
2005年 | 10篇 |
2004年 | 9篇 |
2003年 | 10篇 |
1999年 | 8篇 |
1998年 | 33篇 |
1997年 | 26篇 |
1996年 | 43篇 |
1995年 | 45篇 |
1994年 | 44篇 |
1993年 | 23篇 |
1992年 | 12篇 |
1991年 | 5篇 |
1989年 | 3篇 |
1985年 | 3篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1978年 | 3篇 |
1977年 | 5篇 |
1976年 | 3篇 |
1975年 | 13篇 |
1973年 | 7篇 |
1970年 | 3篇 |
1965年 | 4篇 |
1964年 | 12篇 |
1963年 | 4篇 |
1962年 | 5篇 |
1961年 | 12篇 |
1960年 | 5篇 |
1959年 | 7篇 |
1958年 | 4篇 |
1921年 | 2篇 |
1914年 | 2篇 |
1911年 | 2篇 |
1908年 | 3篇 |
排序方式: 共有4542条查询结果,搜索用时 0 毫秒
101.
Andr�� L. Mihaljevic Christoph W. Michalski Helmut Friess J?rg Kleeff 《Langenbeck's archives of surgery / Deutsche Gesellschaft fur Chirurgie》2010,395(4):295-308
Introduction
The purpose of this review is to highlight the molecular mechanisms leading to the development and progression of pancreatic ductal adenocarcinoma (PDAC) with particular emphasis on tumor cell proliferation, local invasion, and metastasis. Recent advances in the field of PDAC biology have shed light on the molecular events that trigger PDAC initiation and maintenance. 相似文献102.
B. Pineda J. J. Tar��n C. Hermenegildo P. Laporta A. Cano M. ��. Garc��a-P��rez 《Osteoporosis international》2011,22(5):1451-1458
Summary
We have analysed the association of single-nucleotide polymorphisms (SNPs) in CD40 and CD40L genes with bone mineral density (BMD) in our women. Results showed that women with TT genotype for rs1883832 (CD40) and for rs1126535 (CD40L) SNPs displayed reduced BMD and increased risk for osteopenia/osteoporosis. Our data notwithstanding, the results need to be replicated. 相似文献103.
104.
In the present review fibromuscular dysplasia (FMD) is presented from a forensic medical point of view. Every artery can be affected by FMD including the aorta and can occur simultaneously either isolated or in different arteries. The symptoms and consequences of FMD depend on the localization and the severity of the arterial wall changes. While FMD of the renal arteries and the cervical arteries has substantial relevance in clinical practice, forensic pathologists who examine sudden unexpected deaths, observe FMD more frequently in arteries of the heart. There are several case reports in the literature whereby FMD of the atrioventricular (av) node artery is most frequently mentioned in connection with the cause of death. 相似文献
105.
Recent studies with human embryonic stem (hES) cells have established new protocols for substantial generation of pancreatic progenitors from definitive endoderm. These findings add to the efficient derivation of definitive endoderm, which is controlled by Wnt and Nodal pathways, and delineate a step forward in the quest for alternative β-cell sources. It also indicates that critical refining of the available strategies might help define a universal protocol for pancreatic differentiation applicable to several cell lines, therefore offering the possibility for transplantation of immune-matched or patient-specific hES–derived β-cells. We appraise here the fundamental role that bone morphogenetic protein, fibroblast growth factor, and retinoid signaling play during pancreas development, and describe a fundamental emergence of their combination in recent studies that generated pancreatic cells from hES cells. We finally enumerate some prospects that might improve further differentiation of the progenitor cells into functional β-cells needed in diabetes cell therapy. 相似文献
106.
107.
108.
Surgical treatment of anal fissure is represented by fissurectomy with or without anoplasty. 相似文献
109.
110.