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   517篇
  免费   20篇
  国内免费   17篇
儿科学   21篇
妇产科学   5篇
基础医学   34篇
口腔科学   6篇
临床医学   42篇
内科学   89篇
皮肤病学   8篇
神经病学   34篇
特种医学   143篇
外科学   46篇
综合类   34篇
预防医学   17篇
眼科学   12篇
药学   26篇
中国医学   1篇
肿瘤学   36篇
  2021年   3篇
  2020年   2篇
  2019年   4篇
  2018年   5篇
  2017年   4篇
  2016年   2篇
  2015年   2篇
  2014年   8篇
  2013年   9篇
  2012年   4篇
  2011年   4篇
  2010年   12篇
  2009年   16篇
  2008年   13篇
  2007年   8篇
  2006年   14篇
  2005年   18篇
  2004年   4篇
  2003年   10篇
  2002年   15篇
  2001年   14篇
  2000年   10篇
  1999年   16篇
  1998年   26篇
  1997年   40篇
  1996年   27篇
  1995年   22篇
  1994年   24篇
  1993年   18篇
  1992年   7篇
  1991年   14篇
  1990年   6篇
  1989年   25篇
  1988年   20篇
  1987年   22篇
  1986年   11篇
  1985年   12篇
  1984年   9篇
  1983年   10篇
  1982年   10篇
  1981年   11篇
  1980年   6篇
  1979年   4篇
  1978年   2篇
  1977年   3篇
  1976年   2篇
  1928年   2篇
  1925年   2篇
  1920年   2篇
  1900年   1篇
排序方式: 共有554条查询结果,搜索用时 9 毫秒
61.
62.
采用综合治疗,抗炎,散瞳,局部治疗与全身应用免疫抑制疗法,治疗319例352眼外伤获得了满意的疗效,眼球挫伤104例,眼球穿孔伤93例,化学烧伤71例,眼炸伤46例。眼热烧伤5例,治疗包括及时清创胶粘或缝合,清除前房出血合理用皮质类固醇和免疫抑制剂等。眼球挫伤治愈率97.12%,穿透伤93.18%,热烧伤66.67%。319例眼外伤治愈率94.67%好转5.33%,并对各种治疗方法进行了讨论。  相似文献   
63.

Background  

In India, presently malaria shows a declining trend whereas Plasmodium falciparum (Pf) cases show an up trend. In central India, specifically, Madhya Pradesh (M.P.) a forested and tribal area, control of malaria is logistically difficult and outbreaks are frequently recorded, reasons for this being inadequate surveillance, poor reporting, a time lag in reporting to decision makers and a lack of geo referenced information to pin point the trouble spots for a timely preventive action.  相似文献   
64.
The fibrinogen activity in thawed cryoprecipitate stored between 1 and 6 degrees C is maintained essentially unchanged in most bags for a month. Occasionally, a bag will have a reduction in fibrinogen. If pooling has not occurred, thawed cryoprecipitate should be useful as a source of fibrinogen for a period of time considerably in excess of the 6 hours allowed for its use as a source of factor VIII or von Willebrand factor.  相似文献   
65.
Hepatic spiral CT: reduction of dose of intravenous contrast material   总被引:13,自引:0,他引:13  
  相似文献   
66.
There is accumulating evidence that sulfated lipids, sulfated oligosaccharides and other sulfated compounds are reactive with selectins in a manner that interferes with selectin interactions with their natural ligands. In the report we describe the ability of sulfated lipids (sulfatides and gangliosides) and multimeric forms of sulfated sialic acid to block binding of P- and E-selectin-Ig to neutrophils. The in vivo ability of these compounds to block lung injury in rats following i.v. infusion of purified cobra venom factor (CVF), which induces injury that is L- and P-selectin dependent, was also determined as well as effects on recruitment of neutrophils, as measured by lung myeloperoxidase. There was a significant correlation between the ability of sulfated lipids and sialyl compounds to interfere in vitro with P-selectin-Ig binding to neutrophils and to protect against P-selectin-dependent acute lung injury induced by CVF. The biological effects of these sulfated compounds were also associated with diminished accumulation of neutrophils. The protective effects of these compounds may be linked to their ability to interfere with P- selectin binding to counter-receptors on neutrophils.   相似文献   
67.
68.
表皮生长因子对TPN大鼠肠粘膜机械屏障的影响   总被引:2,自引:1,他引:1  
本文旨在探讨表皮生长因子(EGF)对TPN大鼠小肠粘膜机械屏障的保护作用。将48只SD大鼠随机分为正常对照组、TPN组以及TPN-EGF组。结果显示TPN组大鼠小肠绒毛面积、高度、隐窝深度、隐窝细胞数及有丝分裂指数均较对照组明显降低(P〈0.01);TPN-EGF组与对照组比较无显著差异(P〉0.05)。提示外源性补充EGF能促进TPN大鼠隐窝细胞增殖,恢复隐窝细胞生成率,从而达到保护肠粘膜机械屏  相似文献   
69.
Temporomandibular joint: value of coronal MR images   总被引:3,自引:0,他引:3  
Brooks  SL; Westesson  PL 《Radiology》1993,188(2):317
  相似文献   
70.
Counts of Pick bodies (PB), Pick cells (PC), senile plaques (SP) and neurofibrillary tangles (NFT) were made in the frontal and temporal cortex from patients with Pick's disease (PD). Lesions were stained histologically with hematoxylin and eosin (HE) and the Bielschowsky silver impregnation method and labeled immunohistochemically with antibodies raised to ubiquitin and tau. The greatest numbers of PB were revealed by immunohistochemistry. Counts of PB revealed by ubiquitin and tau were highly positively correlated which suggested that the two antibodies recognized virtually identical populations of PB. The greatest numbers of PC were revealed by HE followed by the anti-ubiquitin antibody. However, the correlation between counts was poor, suggesting that HE and ubiquitin revealed different populations of PC. The greatest numbers of SP and NFT were revealed by the Bielschowsky method indicating the presence of Alzheimer-type lesions not revealed by the immunohistochemistry. In addition, more NFT were revealed by the anti-ubiquitin compared with the anti-tau antibody. The data suggested that in PD: (i) the anti-ubiquitin and anti-tau antibodies were equally effective at labeling PB; (ii) both HE and anti-ubiquitin should be used to quantitate PC; and (iii) the Bielschowsky method should be used to quantitate SP and NFT.  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