首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1686篇
  免费   61篇
  国内免费   8篇
耳鼻咽喉   146篇
儿科学   34篇
妇产科学   13篇
基础医学   183篇
口腔科学   19篇
临床医学   119篇
内科学   426篇
皮肤病学   74篇
神经病学   79篇
特种医学   67篇
外科学   291篇
综合类   6篇
一般理论   2篇
预防医学   75篇
眼科学   2篇
药学   108篇
中国医学   1篇
肿瘤学   110篇
  2023年   4篇
  2022年   20篇
  2021年   27篇
  2020年   26篇
  2019年   48篇
  2018年   36篇
  2017年   32篇
  2016年   41篇
  2015年   55篇
  2014年   46篇
  2013年   75篇
  2012年   137篇
  2011年   125篇
  2010年   89篇
  2009年   57篇
  2008年   95篇
  2007年   112篇
  2006年   118篇
  2005年   109篇
  2004年   109篇
  2003年   89篇
  2002年   71篇
  2001年   5篇
  2000年   12篇
  1999年   12篇
  1998年   12篇
  1997年   19篇
  1996年   16篇
  1995年   15篇
  1994年   14篇
  1993年   7篇
  1992年   13篇
  1991年   7篇
  1990年   9篇
  1989年   6篇
  1988年   4篇
  1987年   4篇
  1986年   8篇
  1985年   6篇
  1984年   6篇
  1982年   5篇
  1981年   8篇
  1980年   3篇
  1979年   3篇
  1977年   4篇
  1976年   3篇
  1975年   3篇
  1974年   3篇
  1973年   7篇
  1970年   3篇
排序方式: 共有1755条查询结果,搜索用时 20 毫秒
991.
992.
Seventy-two hours following a middle cerebral artery occlusion, the associated increase in water content on the ischemic side was significantly reduced by the exogenous administration of monosialoganglioside GM1 (30 mg/kg, i.p.). The levels of dopamine and serotonin on the ischemic side were approximately 50% and 80% of those on the contralateral non-ischemic side, respectively. Treatment with GM1 (5 times during the first 48 h after occlusion) produced a significant reduction in the levels of dopamine and serotonin loss. The present findings are compatible with the observed protective action of the exogenously administered GM1 following ischemic brain injury.  相似文献   
993.
The aim of this study was to explore the feasibility of the Lüscher color test (LCT), a psychological instrument based on theory that colors are selected in unconscious way and that the color sensory perception of color is objective and universal. The research has involved 24 Ethiopian women, which delivered at the Getche Health Center in Gurage. It seemed to be relevant for the majority of Ethiopian women identify the rejected color (58.66%), the gray, than the favorite color, the yellow 33.33%). The yellow color suggests that they better express their personality in a physical context, while the gray color indicates that they want to live this experience intensely. This exploratory work lays the foundations for further studies in disadvantaged women, both in developing low-income Countries as well as in industrialized Countries characterized by an high level of emigration, and for clinical applications by the complete LCT version.  相似文献   
994.
995.
996.
Journal of Neuro-Oncology - Therapeutic intervention at glioblastoma (GBM) progression, as defined by current assessment criteria, is arguably too late as second-line therapies fail to extend...  相似文献   
997.
Experimental studies suggest that angiogenesis plays an important role in the pathogenesis of ascites and progression of ovarian cancer. To evaluate the association of intratumoral microvessel density (IMD) with the conventional clinicopathologic features and to determine the capability of these factors in predicting responsiveness to platinum-based chemotherapy and overall survival (OS) we studied 112 ovarian carcinomas. IMD was determined using the anti-CD31 antibody and immunocytochemistry. In the entire series, we correlated IMD with the other features. In the subgroup of patients with FIGO stage III-IV (60 cases), we correlated the factors studied, determined prior of treatment, with response to therapy and prognosis. The median IMD value, in the “hot spot”, in the entire series was of 48 microvessels/field. IMD values were significantly higher in mucinous carcinomas than in the other histologic types. In FIGO stage III-IV patients IMD, age and performance status (PS) were significantly associated with the probability of pathologic response to chemotherapy in univariate analysis. However, only IMD and PS retained significance in multivariate analysis. The overall capability of the 2 variables to predict response was high. In FIGO stage III-IV patients IMD, age, PS, the amount of post-operative residual disease (PORD), histologic type and response to chemotherapy were significant prognostic indicators of OS in univariate analysis. In multivariate analysis only histologic type, PORD and PS retained significance. The overall capability of these 3 variables to predict OS was satisfactory. © 1996 Wiley-Liss, Inc.  相似文献   
998.
999.
Mucormycosis is a rare and potentially life‐threatening infection, typically affecting immunocompromised hosts. We report a case of an adolescent boy who developed primary isolated cutaneous mucormycosis in the early period following kidney transplantation. Surgical excision was performed using intraoperative fungal staining to obtain clear margins, followed by topical and systemic antifungal therapy. A skin graft was then applied to the excised area with good healing, and the patient made a full recovery.  相似文献   
1000.
Carmela  Ioppolo  Gino  Amiconi  Douglas L.  Currell  Gennaro  Maffei    Lello  Zolla  Eraldo  Antonini 《Vox sanguinis》1974,27(5):403-410
Abstract. The rate of reduction of ferrihemoglobin within the erythrocytes and the oxygen affinity of red cells have been measured as a function of time of blood storage. The efficiency of the ferrihemoglobin-reducing systems decreases with time of storage as measured both in presence of glucose or lactate as substrates. The well-known increase with ageing of the oxygen affinity (as measured by p1/2) for blood stored in ACD is observed when the p1/2 is determined in Tris-HCl buffer and parallels the decay of the rate of ferrihemoglobin reduction. However, the increase in oxygen affinity is not observed when the p1/2 is measured in phosphate buffer; this is explained as being due to the replacement of the originally hemoglobin-bound DPG by phosphate ions entering the red cell.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号