全文获取类型
收费全文 | 5468篇 |
免费 | 339篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 120篇 |
儿科学 | 129篇 |
妇产科学 | 101篇 |
基础医学 | 872篇 |
口腔科学 | 96篇 |
临床医学 | 481篇 |
内科学 | 1283篇 |
皮肤病学 | 167篇 |
神经病学 | 611篇 |
特种医学 | 378篇 |
外国民族医学 | 4篇 |
外科学 | 671篇 |
综合类 | 38篇 |
一般理论 | 2篇 |
预防医学 | 259篇 |
眼科学 | 65篇 |
药学 | 209篇 |
中国医学 | 3篇 |
肿瘤学 | 336篇 |
出版年
2022年 | 40篇 |
2021年 | 65篇 |
2020年 | 56篇 |
2019年 | 65篇 |
2018年 | 86篇 |
2017年 | 69篇 |
2016年 | 98篇 |
2015年 | 112篇 |
2014年 | 128篇 |
2013年 | 169篇 |
2012年 | 223篇 |
2011年 | 257篇 |
2010年 | 155篇 |
2009年 | 165篇 |
2008年 | 221篇 |
2007年 | 254篇 |
2006年 | 214篇 |
2005年 | 249篇 |
2004年 | 228篇 |
2003年 | 193篇 |
2002年 | 158篇 |
2001年 | 158篇 |
2000年 | 175篇 |
1999年 | 147篇 |
1998年 | 69篇 |
1997年 | 63篇 |
1996年 | 45篇 |
1995年 | 42篇 |
1994年 | 52篇 |
1993年 | 48篇 |
1992年 | 112篇 |
1991年 | 97篇 |
1990年 | 119篇 |
1989年 | 104篇 |
1988年 | 93篇 |
1987年 | 121篇 |
1986年 | 103篇 |
1985年 | 79篇 |
1984年 | 65篇 |
1983年 | 60篇 |
1982年 | 38篇 |
1981年 | 43篇 |
1979年 | 50篇 |
1978年 | 47篇 |
1975年 | 38篇 |
1974年 | 45篇 |
1973年 | 42篇 |
1972年 | 43篇 |
1971年 | 41篇 |
1970年 | 43篇 |
排序方式: 共有5825条查询结果,搜索用时 15 毫秒
1.
2.
Ponner Stach Zoller Hagenhofer Voll Kalden & Herrmann 《Scandinavian journal of immunology》1998,47(4):343-347
Apoptotic cells, e.g. postinflammatory neutrophils, were reported to be engulfed by phagocytes without induction of an inflammatory response. We investigated the humoral immune response of BALB/c mice after repeated injection of viable or apoptotic human T cells. Following interleukin-2 (IL-2) deprivation, phytohaemagglutinin (PHA)/IL-2 expanded human T-cell lines were irradiated with UV-B light to induce apoptosis, confirmed by propidium iodide staining of Triton X-100-lysed cells. Indirect immunofluorescence was used to detect antilymphocyte antibodies 7 days after each injection. We found high levels of antilymphocyte antibodies in all animals immunized with viable T cells, whereas animals injected with apoptotic cells showed a significantly reduced humoral immune response. We conclude that apoptotic cells induce poor xenoreactive T-cell responses when compared with viable cells. 相似文献
3.
4.
Prof. Dr. Wolfgang Dörr Sabine Köst Klaus Keinert Felix-Herbert Glaser Gerd Endert Thomas Herrmann 《Strahlentherapie und Onkologie》2006,182(1):1-8
PURPOSE: To compare tests for intestinal function with clinical scores after abdominal irradiation. PATIENTS AND METHODS: At the Department of Radiotherapy, Erfurt, Germany, intestinal changes were studied in 91 patients receiving abdominal radiotherapy between 1992 and 1996. Conventional fractionation (1.8-2 Gy per fraction, total doses 30.6-62.5 Gy) was applied. Before and at weekly intervals during radiotherapy, the clinical response was scored according to RTOG/EORTC for the upper and lower gastrointestinal (GI) tract. Resorption tests for vitamin B(12) and D-xylose were performed before the onset and immediately after treatment. RESULTS: The clinical response displayed a well-defined dose-effect relationship with grade 1 effects in 5% and 50% of the patients at about 10 Gy and 50 Gy, respectively. For grade 2 reactions, 5%- and 50%-effective doses were 20-30 Gy and 60-80 Gy. Effects in the upper and lower GI tract were highly correlated. Changes in body weight did not show a correlation with other clinical symptoms. Changes in resorption also displayed a significant dose effect. However, no correlation was found with the clinical symptoms in the individual patient. CONCLUSION: In the present study, the clinical manifestation of intestinal side effects according to RTOG/EORTC criteria was reflected by neither the vitamin B(12) nor by the D-xylose resorption test. Hence, these tests cannot be regarded as useful for objective quantitation of intestinal radiation injury. 相似文献
5.
6.
F T McDermott G Whelan D J St John G L Barnes R Elliott R Herrmann G T Schmidt R A Smallwood 《The Medical journal of Australia》1987,146(10):525, 528-525, 529
Information on the relative incidence of Crohn's disease and ulcerative colitis was obtained by a prospective investigation at six Melbourne teaching hospitals. One hundred and eleven patients who presented with chronic inflammatory bowel diseases between 1980-1981 were admitted to the study. Forty (36%) patients were diagnosed as having Crohn's disease and 63 (57%) patients as having ulcerative colitis. The type of chronic inflammatory bowel disease could not be determined in eight (7%) patients. These findings suggest that the relative frequency of Crohn's disease and ulcerative colitis in Melbourne hospitals is within the range that is reported for northern Europe and the United States. 相似文献
7.
8.
9.
Occurrence of the t(2;5)(p23;q35) in non-Hodgkin's lymphoma 总被引:9,自引:3,他引:6
Weisenburger DD; Gordon BG; Vose JM; Bast MA; Chan WC; Greiner TC; Anderson JR; Sanger WG 《Blood》1996,87(9):3860-3868
Primary CD30(Ki-1)-positive anaplastic large-cell lymphoma (ALCL) is considered by some to be a distinct clinicopathologic entity associated with the t(2;5) (p23;q35). However, the specificity of t(2;5) for ALCL has not been carefully studied. Therefore, we performed a detailed analysis of all cases of ALCL with abnormal cytogenetics results in the Nebraska Lymphoma Study Group registry, as well as all other cases of non-Hodgkin's lymphoma with t(2;5) in the registry. We found the t(2;5) in only five of 10 cases of ALCL, four of whom were young patients. However, we also found the t(2;5) in 11 other cases of nonanaplastic lymphoma, including eight children with typical peripheral T-cell lymphomas of various types. The t(2;5) was also found in three older adults with B-cell lymphomas of various types. Thus, the t(2;5) was not specific for CD30+ ALCL. However, t(2;5) may define a clinicopathologic entity in children and young adults characterized by variable morphologies with a T-cell or indeterminate phenotype, CD30-positivity, nodal disease with frequent extranodal involvement, advanced stage, and an excellent response to therapy, including bone marrow transplantation for relapsed disease. The clinical relevance of the t(2;5) in older patients requires further study. 相似文献
10.