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   210篇
  免费   9篇
  国内免费   4篇
儿科学   22篇
妇产科学   2篇
基础医学   15篇
口腔科学   2篇
临床医学   15篇
内科学   45篇
皮肤病学   2篇
神经病学   5篇
特种医学   81篇
外科学   13篇
综合类   3篇
预防医学   2篇
药学   9篇
肿瘤学   7篇
  2022年   1篇
  2021年   1篇
  2020年   1篇
  2019年   6篇
  2018年   1篇
  2017年   1篇
  2016年   2篇
  2015年   1篇
  2014年   2篇
  2013年   5篇
  2012年   1篇
  2011年   1篇
  2010年   5篇
  2009年   9篇
  2007年   4篇
  2006年   3篇
  2004年   1篇
  2003年   1篇
  2002年   1篇
  2001年   3篇
  2000年   2篇
  1999年   2篇
  1998年   15篇
  1997年   13篇
  1996年   16篇
  1995年   5篇
  1994年   9篇
  1993年   11篇
  1992年   1篇
  1991年   1篇
  1990年   5篇
  1989年   12篇
  1988年   10篇
  1987年   9篇
  1986年   9篇
  1985年   11篇
  1984年   3篇
  1983年   6篇
  1982年   9篇
  1981年   1篇
  1980年   4篇
  1979年   4篇
  1978年   6篇
  1977年   4篇
  1976年   2篇
  1975年   3篇
排序方式: 共有223条查询结果,搜索用时 0 毫秒
151.
152.
153.
154.
155.
156.
Hepatic epithelioid hemangioendothelioma   总被引:5,自引:0,他引:5  
Radin  DR; Craig  JR; Colletti  PM; Ralls  PW; Halls  JM 《Radiology》1988,169(1):145-148
Epithelioid hemangioendothelioma (EHE) is a rare, malignant neoplasm of vascular origin arising in soft tissues, lung, and liver. Four cases of hepatic EHE are reported, and 49 previously reported cases are reviewed. The tumor occurs in adults of all ages; 66% of patients are women. The prognosis is variable. Computed tomographic findings suggest the tumor begins as multiple hepatic nodules that grow and coalesce, forming large confluent masses preferentially involving the liver periphery. Extensive hepatic involvement is associated with enlargement of uninvolved portions of the liver and splenomegaly. Awareness of the radiologic features is helpful because clinical findings are nonspecific, and biopsy specimens may be misinterpreted as carcinoma or venoocclusive disease.  相似文献   
157.
158.
Manual vacuum aspiration (MVA) is an alternative to the standard surgical curettage, performed under local anaesthetic in the setting of a treatment room. The aim of our study was to assess the efficacy of MVA in the management of first trimester early fetal demise and first- and mid-trimester incomplete miscarriage. This was a retrospective study of 246 patients who were scheduled to undergo MVA for first trimester early fetal demise and first- and mid-trimester incomplete miscarriage. One woman was excluded in the analysis because of the procedure being abandoned prior to MVA. Efficacy of the procedure was 94.7% (232/245). Incomplete uterine evacuation was seen in 5.3% (13/245) patients. Although not widely used in the UK, MVA could be considered routinely, thus avoiding general anaesthesia and the need for access to theatre.  相似文献   
159.
Largo  R; Heller  V; Straub  PW 《Blood》1976,47(6):991-1002
The presence of minimal amounts of fibrinogen-fibrin intermediates in human plasma was visualized by an agglutination reaction of glutaraldehyde-treated human erythrocytes coated with purified fibrin monomers. A degree of monomer coating was established which produced erythrocytes not agglutinated by normal plasma but by plasma containing minimal amounts of soluble complexes of fibrinogen with fibrin monomers. Under standardized conditions of coating, erythrocyte concentration, temperature, pH, and incubation time, the agglutination time varied with the ratio of soluble fibrin to fibrinogen in plasma. The test was sensitive down to a soluble fibrin concentration of 0.675% of the plasma fibrinogen concentration. Early fibrinogen and fibrin degradation products (FDP) in the plasma led to a prolongation of the agglutination time at a concentration of more than 16 mg/100 ml. Late FDP in a concentration of 100 mg/100 ml did not convert a positive test to negative. The test was not affected by heparin and protamine at concentrations of up to 12.5 and 50 NIH units/ml, respectively.  相似文献   
160.
Neonatal kidneys: sonographic anatomic correlation   总被引:1,自引:0,他引:1  
  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