全文获取类型
收费全文 | 8117篇 |
免费 | 512篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 112篇 |
儿科学 | 266篇 |
妇产科学 | 201篇 |
基础医学 | 1127篇 |
口腔科学 | 132篇 |
临床医学 | 901篇 |
内科学 | 1509篇 |
皮肤病学 | 96篇 |
神经病学 | 664篇 |
特种医学 | 264篇 |
外科学 | 1543篇 |
综合类 | 122篇 |
一般理论 | 1篇 |
预防医学 | 597篇 |
眼科学 | 140篇 |
药学 | 496篇 |
中国医学 | 11篇 |
肿瘤学 | 481篇 |
出版年
2023年 | 37篇 |
2022年 | 45篇 |
2021年 | 110篇 |
2020年 | 68篇 |
2019年 | 114篇 |
2018年 | 169篇 |
2017年 | 119篇 |
2016年 | 122篇 |
2015年 | 141篇 |
2014年 | 233篇 |
2013年 | 338篇 |
2012年 | 464篇 |
2011年 | 444篇 |
2010年 | 295篇 |
2009年 | 240篇 |
2008年 | 448篇 |
2007年 | 560篇 |
2006年 | 465篇 |
2005年 | 545篇 |
2004年 | 462篇 |
2003年 | 471篇 |
2002年 | 410篇 |
2001年 | 123篇 |
2000年 | 115篇 |
1999年 | 96篇 |
1998年 | 86篇 |
1997年 | 70篇 |
1996年 | 85篇 |
1995年 | 71篇 |
1994年 | 75篇 |
1993年 | 61篇 |
1992年 | 99篇 |
1991年 | 106篇 |
1990年 | 90篇 |
1989年 | 66篇 |
1988年 | 82篇 |
1987年 | 78篇 |
1986年 | 79篇 |
1985年 | 73篇 |
1984年 | 80篇 |
1983年 | 61篇 |
1982年 | 61篇 |
1981年 | 60篇 |
1980年 | 51篇 |
1979年 | 67篇 |
1978年 | 50篇 |
1977年 | 39篇 |
1976年 | 42篇 |
1975年 | 34篇 |
1973年 | 35篇 |
排序方式: 共有8663条查询结果,搜索用时 31 毫秒
1.
Kara S. Tanaka MD Veronica R. Andaya BA Steven W. Thorpe MD Kenneth R. Gundle MD James B. Hayden MD Yee-Cheen Duong MD Raffi S. Avedian MD David G. Mohler MD Lee J. Morse MD Melissa N. Zimel MD Richard J. O'Donnell MD Andrew Fang MD Robert Lor Randall MD Tina H. Tran BS Christin New BA Rosanna L. Wustrack MD other members of Study Group FORCE 《Journal of surgical oncology》2023,127(1):148-158
2.
Triposkiadis Filippos Xanthopoulos Andrew Skoularigis John Starling Randall C. 《Heart failure reviews》2022,27(6):1991-2003
Heart Failure Reviews - The nitric oxide (NO)–guanylate cyclase (GC)–cyclic guanosine monophosphate (cGMP) pathway plays an important role in cardiovascular, pulmonary and renal... 相似文献
3.
4.
5.
Anthony R. Flores Brittany E. Jewell Erika M. Versalovic Randall J. Olsen Beth A. Bachert Slawomir Lukomski James M. Musser 《Infection and immunity》2015,83(3):1122-1129
Group A Streptococcus (GAS) predominantly exists as a colonizer of the human oropharynx that occasionally breaches epithelial barriers to cause invasive diseases. Despite the frequency of GAS carriage, few investigations into the contributory molecular mechanisms exist. To this end, we identified a naturally occurring polymorphism in the gene encoding the streptococcal collagen-like protein A (SclA) in GAS carrier strains. All previously sequenced invasive serotype M3 GAS possess a premature stop codon in the sclA gene truncating the protein. The carrier polymorphism is predicted to restore SclA function and was infrequently identified by targeted DNA sequencing in invasive strains of the same serotype. We demonstrate that a strain with the carrier sclA allele expressed a full-length SclA protein, while the strain with the invasive sclA allele expressed a truncated variant. An isoallelic mutant invasive strain with the carrier sclA allele exhibited decreased virulence in a mouse model of invasive disease and decreased multiplication in human blood. Further, the isoallelic invasive strain with the carrier sclA allele persisted in the mouse nasopharynx and had increased adherence to cultured epithelial cells. Repair of the premature stop codon in the invasive sclA allele restored the ability to bind the extracellular matrix proteins laminin and cellular fibronectin. These data demonstrate that a mutation in GAS carrier strains increases adherence and decreases virulence and suggest selection against increased adherence in GAS invasive isolates. 相似文献
6.
7.
8.
Hirschsprung's disease in young adults 总被引:3,自引:0,他引:3
Hirschsprung's disease is rarely seen in the young adult, and presents unique problems in management because of the massive dilatation and hypertrophy that occur proximal to the aganglionic rectum or the rectosigmoid colon. The diagnosis, which may be suspected by barium enema, is confirmed by suction or full-thickness biopsy of the rectum that may be complemented by anal manometry. Based on our experience with eight patients, a two-stage surgical reconstruction is recommended, with a preliminary sigmoid colostomy through the normally innervated colon and an associated defunctionalized stoma constituting the initial operation. The distal colonic stoma permits cleansing of the caudal colon while the normally innervated proximal colon reverts to near normal caliber, usually within 2 to 6 months. This approach is in accord with the recommendation of Fairgrieve. Reconstruction using a Duhamel or Soave procedure has given good results. The Duhamel procedure seems preferable when a considerable discrepancy remains between the ganglionic and aganglionic segments of rectum. 相似文献
9.
Development of metabolic alkalosis after massive transfusion during orthotopic liver transplantation
D F Driscoll B R Bistrian R L Jenkins S Randall W H Dzik B Gerson G L Blackburn 《Critical care medicine》1987,15(10):905-908
Five patients undergoing orthotopic liver transplantation were investigated for changes in acid-base homeostasis secondary to large volume transfusions. All patients developed a transient acidemia during the operative period, followed by alkalemia which persisted into the early postoperative period. The patients received an estimated mean of 750 mEq of citrate, which appeared to cause metabolic alkalosis. The biochemical basis underlying the regulation of citrate metabolism that may have led to the timing, extent, and duration of the subsequent metabolic alkalosis is presented. Finally, the time course for the development of metabolic alkalosis may be a potentially sensitive indicator of early allograft function. 相似文献
10.
Starling III John BA Patel Purvisha J. MD Rasberry Ron D. MD 《Dermatologic surgery》2005,31(4):484-485
BACKGROUND: Simple surgical excision is one of the most common treatment methods in the dermatologist's armamentarium. We describe a precise postsurgical dressing technique that can be used for wound care of those patients whose treatment involves removal of lesions via cutaneous surgery. OBJECTIVE: To devise a novel, precise, and effective dressing technique for postsurgical wound care. MATERIALS AND METHODS: We describe the technique using common in-office instruments. RESULTS AND CONCLUSION: Wound dressings for lesions located on curved areas such as the ears, nose, cheeks, and chin often exhibit less than adequate adherence and stability. The kerf-cut dressing technique optimizes pliability of dressing tape, and this maximizes efficient and stable application of postsurgical wound dressings to curved areas of the body. 相似文献