全文获取类型
收费全文 | 11729篇 |
免费 | 865篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 165篇 |
儿科学 | 397篇 |
妇产科学 | 239篇 |
基础医学 | 1426篇 |
口腔科学 | 202篇 |
临床医学 | 1127篇 |
内科学 | 2426篇 |
皮肤病学 | 245篇 |
神经病学 | 1004篇 |
特种医学 | 544篇 |
外科学 | 1693篇 |
综合类 | 166篇 |
一般理论 | 6篇 |
预防医学 | 1147篇 |
眼科学 | 255篇 |
药学 | 626篇 |
中国医学 | 7篇 |
肿瘤学 | 943篇 |
出版年
2022年 | 105篇 |
2021年 | 216篇 |
2020年 | 130篇 |
2019年 | 194篇 |
2018年 | 233篇 |
2017年 | 176篇 |
2016年 | 172篇 |
2015年 | 200篇 |
2014年 | 268篇 |
2013年 | 434篇 |
2012年 | 695篇 |
2011年 | 719篇 |
2010年 | 372篇 |
2009年 | 344篇 |
2008年 | 603篇 |
2007年 | 658篇 |
2006年 | 620篇 |
2005年 | 595篇 |
2004年 | 555篇 |
2003年 | 493篇 |
2002年 | 456篇 |
2001年 | 251篇 |
2000年 | 232篇 |
1999年 | 220篇 |
1998年 | 129篇 |
1997年 | 86篇 |
1996年 | 82篇 |
1995年 | 80篇 |
1994年 | 80篇 |
1993年 | 83篇 |
1992年 | 179篇 |
1991年 | 157篇 |
1990年 | 150篇 |
1989年 | 167篇 |
1988年 | 158篇 |
1987年 | 160篇 |
1986年 | 175篇 |
1985年 | 174篇 |
1984年 | 119篇 |
1983年 | 122篇 |
1982年 | 72篇 |
1981年 | 76篇 |
1980年 | 88篇 |
1979年 | 121篇 |
1978年 | 87篇 |
1977年 | 86篇 |
1975年 | 71篇 |
1974年 | 72篇 |
1973年 | 84篇 |
1972年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Varsha Patki Joe Virbasius William S. Lane Ban-Hock Toh Howard S. Shpetner Silvia Corvera 《Proceedings of the National Academy of Sciences of the United States of America》1997,94(14):7326-7330
Phosphatidylinositol 3-kinases (PI 3-kinases) have been implicated in membrane trafficking in the secretory and endocytic pathways of yeast and mammalian cells, but the molecular mechanisms by which these lipid kinases operate are not known. Here we identify a protein of 170 kDa that is rapidly released from cell membranes in response to wortmannin, a potent inhibitor of mammalian PI 3-kinases. The amino acid sequence of peptides from p170 reveal its identity to early endosomal antigen (EEA) 1, an endosomal antigen with homology to several yeast proteins genetically implicated in membrane trafficking. Immunofluorescence analysis of 3T3-L1 adipocytes with antisera against p170/EEA1 reveal a punctate peripheral pattern that becomes diffuse in response to wortmannin. In vitro, p170/EEA1 binds specifically to liposomes containing PIns(3)P, suggesting that the effect of wortmannin on cells is due to inhibition of PIns(3)P production. Thus, p170/EEA1 may define a family of proteins that mediate the regulatory effects of 3′-phosphoinositides on membrane trafficking in yeast and mammalian cells. 相似文献
14.
Mark A Rosenthal 《Journal of clinical neuroscience》2004,11(1):66-67
This case report describes the rare phenomenon of encephalopathy associated with massive carcinoid tumor. Extensive investigation failed to reveal an obvious cause but a presumptive diagnosis of tryptophan deficiency was made and she was commenced on tryptophan dietary supplements. A rapid and complete response resulted. This case report discusses this unusual case and reviews the literature regarding carcinoid associated encephalopathy. 相似文献
15.
16.
Inflammatory central nervous system disease in lupus-prone MRL/lpr mice: comparative histologic and immunohistochemical findings 总被引:7,自引:0,他引:7
Catherine M. Vogelweid Gayle C. Johnson Cynthia L. Besch-Williford Joe Basler Sara E. Walker 《Journal of neuroimmunology》1991,35(1-3):89-99
The brains of pathogen-free autoimmune MRL/lpr, NZBWF1 and NZB mice were examined for central nervous system (CNS) inflammation in premoribund 8-week-old animals and at ages when active systemic lupus erythematosus (SLE) was present. CNS inflammation was observed only in MRL/lpr mice. Immunohistochemical studies of brains from young MRL/lpr mice found that infiltrates were composed primarily of CD4+ cells. Older MRL/lpr mice (22 and 26 weeks of age) had CD4+ cells predominantly, but CD8+ and B220+ cells were also present. Perivascular leakage of IgG was a prominent and unexpected finding in the MRL/lpr model. Congenic MRL/+ mice with late-onset autoimmunity had no inflammatory cells in brain tissue, and there was no perivascular staining with IgG or albumin. Our findings suggest that MRL/lpr mice are a useful model for studies of lupus-associated CNS inflammatory disease, and perivascular leakage may be a primary mechanism for entry of IgG into the brain. 相似文献
17.
18.
Dr. Felix Rosenthal 《Naunyn-Schmiedeberg's archives of pharmacology》1914,75(2):99-122
Ohne ZusammenfassungMit 1 Kurve. 相似文献
19.
Jennifer S. Singer Robert B. Ettenger John L. Gore H. Albin Gritsch Jacob Rajfer J. Thomas Rosenthal Peter Schulam 《American journal of transplantation》2005,5(10):2514-2520
Despite reports demonstrating the safety of laparoscopic donor nephrectomy (LDN) for pediatric recipients of renal transplants, recent evidence has challenged using LDN for recipients 5 years of age or younger. We retrospectively reviewed the records of all pediatric recipients of living donor renal transplants from September 2000 through August 2004. We compared those who received allografts recovered by LDN (n = 34) with those recovered by open donor nephrectomy (ODN, n = 26). Outcomes of interest included operative complications, postoperative renal function, the incidence of delayed graft function or episodes of acute rejection and long-term graft function. Donor and recipient demographic data were similar for the LDN and ODN groups. Serum creatinine and calculated creatinine clearance were not significantly different between groups both in the early postoperative period and at long-term follow-up (p > 0.142). Rates of delayed graft function and acute rejection did not differ between groups. Among recipients aged 5 years old or younger stratified by donor technique (9 LDN, 5 ODN recipients), no difference was noted in graft outcomes both early and long-term (p > 0.079). At our center, pediatric LDN recipients have graft outcomes comparable to those of ODN recipients. At experienced centers, we recommend continued use of LDN for pediatric recipients of all ages. 相似文献
20.
Charles A Lascano Samuel Szomstein Natan Zundel Raul J Rosenthal 《Surgery for obesity and related diseases》2005,1(4):443-446
The association between weight and blood pressure is well established, especially the paradigm of obesity-related hypertension. The relationship between diffuse autonomic dysfunction and orthostatic hypotension in patients with long-term diabetes mellitus is also well known. We report on a 57-year-old morbidly obese male with a long medical history of hypertension, myocardial infarction, type 2 diabetes mellitus, and hypothyroidism. After a loss of 147 pounds (representing a percent excess weight loss of 76%) within 6 months after gastric bypass surgery, the patient developed worsening orthostatic hypotension and near-syncopal episodes requiring medication. The subsequent diagnosis and treatment, as well as a literature review, are presented. 相似文献