全文获取类型
收费全文 | 2517篇 |
免费 | 167篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 35篇 |
儿科学 | 69篇 |
妇产科学 | 39篇 |
基础医学 | 303篇 |
口腔科学 | 91篇 |
临床医学 | 249篇 |
内科学 | 568篇 |
皮肤病学 | 78篇 |
神经病学 | 180篇 |
特种医学 | 129篇 |
外科学 | 516篇 |
综合类 | 15篇 |
预防医学 | 80篇 |
眼科学 | 36篇 |
药学 | 134篇 |
中国医学 | 2篇 |
肿瘤学 | 178篇 |
出版年
2023年 | 7篇 |
2022年 | 24篇 |
2021年 | 54篇 |
2020年 | 31篇 |
2019年 | 47篇 |
2018年 | 60篇 |
2017年 | 49篇 |
2016年 | 64篇 |
2015年 | 55篇 |
2014年 | 121篇 |
2013年 | 117篇 |
2012年 | 195篇 |
2011年 | 223篇 |
2010年 | 140篇 |
2009年 | 132篇 |
2008年 | 212篇 |
2007年 | 231篇 |
2006年 | 200篇 |
2005年 | 183篇 |
2004年 | 147篇 |
2003年 | 133篇 |
2002年 | 142篇 |
2001年 | 25篇 |
2000年 | 8篇 |
1999年 | 15篇 |
1998年 | 20篇 |
1997年 | 3篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 5篇 |
1990年 | 3篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1975年 | 5篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 6篇 |
1971年 | 5篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
1963年 | 1篇 |
1960年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有2702条查询结果,搜索用时 15 毫秒
21.
Identification of protein pattern in kidney cancer using ProteinChip arrays and bioinformatics 总被引:7,自引:0,他引:7
Junker K Gneist J Melle C Driesch D Schubert J Claussen U Von Eggeling F 《International journal of molecular medicine》2005,15(2):285-290
Tumor biology of renal cell carcinoma (RCC) is not very well understood, although many studies on molecular and cellular biology have been performed. It is accepted now that cancer research has to be performed also with proteomic tools, because proteins are the real actors in the genesis and progression of cancer. Therefore, we used a ProteinChip System(R) (SELDI) which is able to detect minute amounts of protein and moreover to analyze a complex protein pattern. We analyzed 37 cases of clear cell RCC as a training set including corresponding normal tissue. From all samples protein lysates were made and spotted directly on different chip surfaces (SAX2, WCX). After a washing procedure the arrays were analyzed in the ProteinChip Reader. All profiles were subjected to a bioinformatical analysis including normalization, clustering, rule extraction and rating. Defined rules (markers) were evaluated using a test set of 24 samples (13 tumor tissues and 11 normal kidney tissues). The generated rule base for the SAX2 surface showed a sensitivity of 100% and a specificity of 97.3%. For the WCX arrays the optimal rule base showed worse results. A combined rule base for SAX2 and WCX did not result in a higher sensitivity or specificity. Using the optimal rule base for the SAX2 chip in the test set, sensitivity and specificity reached 76.9% and 100%, respectively. The ProteinChip System represents a key technology for the rapid detection of cancer specific proteomic patterns. It is possible to identify clear cell renal cancer with high sensitivity and specificity from minimal amounts of cells. 相似文献
22.
The relationship of serum-eosinophil cationic protein and eosinophil count to disease activity in children with bronchial asthma 总被引:1,自引:0,他引:1
23.
Sofie Gillis Carlos De Wagter Joerg Bohsung Bruce Perrin Peter Williams Ben J Mijnheer 《Radiotherapy and oncology》2005,76(3):340-353
BACKGROUND AND PURPOSE: IMRT necessitates extension of existing inter-centre quality assurance programs due to its increased complexity. We assessed the feasibility of an inter-centre verification method for different IMRT techniques. MATERIALS AND METHODS: Eight European radiotherapy institutions of the QUASIMODO network, have designed an IMRT plan for a horseshoe-shaped PTV surrounding a cylindrical OAR in a simplified pelvic phantom. All centres applied common plan objectives but used their own equipment for planning and delivery. They verified the delivery of this plan according to a common protocol with radiographic film and ionisation chamber measurements. The irradiated films, the results of the ionisation chamber measurements and the computed dose distributions were sent to one analysis centre that compared the measured and computed dose distributions with the gamma method and composite dose-area histograms. RESULTS: 4% (relative to the prescribed dose) and 3mm (distance-to-agreement) were decided feasible gamma criteria. The composite dose-area histograms showed a maximum local deviation of 3.5% in the mean dose of the PTV and 5% in the OAR. Systematic differences could be identified, and in some cases explained. CONCLUSIONS: This multi-centre dosimetric verification study demonstrated both the feasibility of a multi-centre quality assurance network to evaluate any IMRT planning and delivery system combination, as well as the validity of the methodology involved. 相似文献
24.
Joachim Schuster Hanns-Christian Mahler Susanne Joerg Vinay Kamuju Joerg Huwyler Roman Mathaes 《Journal of pharmaceutical sciences》2021,110(6):2386-2394
Changes in the environment from the drug product to the human physiology might lead to physical and/or chemical modifications of the protein drug, such as in vivo aggregation and fragmentation. Although subcutaneous (SC) injection is a common route of administration for therapeutic proteins, knowledge on in vivo stability in the SC tissue is limited. In this study, we developed a physiologic in vitro model simulating the SC environment in patients. We assessed the stability of two monoclonal antibodies (mAbs) in four different protein-free fluids under physiologic conditions. We monitored protein stability over two weeks using a range of analytical methods, in analogy to testing purposes of a drug product. Both mAbs showed an increase of protein aggregates, fragments, and acidic species. mAb1 was consistently more stable in this in vitro model than mAb2, highlighting the importance of comparing the stability of different mAbs under physiologic conditions. Throughout the study, both mAbs were substantially less stable in bicarbonate buffers as compared to phosphate-buffered saline. In summary, our developed model was able to differentiate stability between molecules. Bicarbonate buffers were more suitable compared to phosphate-buffered saline in regards to simulating the in vivo conditions and evaluating protein liabilities. 相似文献
25.
26.
Joerg Kellermair Gitter Roland Mair Rudolf Sigler Matthias Grund Michael Steinwender Clemens 《The Canadian journal of cardiology》2018,34(12):1688.e13-1688.e15
Transcatheter pulmonary valve (TPV) replacement is an effective therapy of right ventricular outflow tract conduit dysfunction. Acute complications after TPV implantation include infective endocarditis, stent fracture, and device dislocation. We present a novel, life-threatening complication: an acute, noninfectious TPV thrombosis. Within 24 hours after implantation of a Melody system (Medtronic, Inc, Minneapolis, MN), the patient developed an acute TPV thrombosis characterized by severe TPV stenosis on echocardiography and contrast filling defects on computed tomography pulmonary angiography images. Genetic testing revealed heterozygous prothrombin G20210A polymorphism and homozygous 4G/4G polymorphism of the plasminogen-activator-inhibitor. The patient recovered after surgical valve replacement with a pulmonary homograft. 相似文献
27.
28.
29.
Pantelis D Beissel A Kahl P Vilz TO Stoffels B Wehner S Kalff JC 《International journal of colorectal disease》2011,26(6):737-746
Purpose
Prevention of perioperative activation of intestinal muscularis macrophages is a promising intervention to avoid post-traumatic gastrointestinal tract dysfunction. However, impaired macrophage function could have deleterious consequences on anastomotic healing, especially in complications aggravating the healing process itself, such as infectious problems either as preexisting local inflammation or infection (e.g., complicated diverticulitis) or endotoxemia due to early postoperative infections (e.g., pneumonia). Aim of this study was to investigate colonic anastomotic healing in macrophage-depleted mice in the presence of endotoxemia. 相似文献30.
Noemie Luong-Gardiol Imran Siddiqui Irene Pizzitola Beena Jeevan-Raj Mélanie Charmoy Yun Huang Anja Irmisch Sara Curtet Georgi S. Angelov Maxime Danilo Mélanie Juilland Beat Bornhauser Margot Thome Oliver Hantschel Yves Chalandon Gianni Cazzaniga Jean-Pierre Bourquin Joerg Huelsken Werner Held 《Cancer cell》2019,35(4):649-663.e10