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   285篇
  免费   18篇
  国内免费   5篇
儿科学   27篇
妇产科学   4篇
基础医学   49篇
口腔科学   2篇
临床医学   36篇
内科学   61篇
皮肤病学   3篇
神经病学   10篇
特种医学   16篇
外科学   35篇
综合类   2篇
预防医学   12篇
眼科学   7篇
药学   30篇
肿瘤学   14篇
  2021年   6篇
  2020年   5篇
  2019年   3篇
  2018年   5篇
  2017年   6篇
  2016年   8篇
  2015年   4篇
  2014年   14篇
  2013年   14篇
  2012年   4篇
  2011年   6篇
  2010年   10篇
  2009年   5篇
  2008年   14篇
  2007年   8篇
  2006年   10篇
  2005年   13篇
  2004年   12篇
  2003年   7篇
  2002年   4篇
  2001年   7篇
  2000年   3篇
  1999年   5篇
  1998年   11篇
  1997年   4篇
  1996年   12篇
  1995年   7篇
  1994年   2篇
  1993年   10篇
  1992年   3篇
  1991年   2篇
  1990年   6篇
  1989年   11篇
  1987年   10篇
  1986年   4篇
  1985年   8篇
  1984年   2篇
  1983年   6篇
  1982年   4篇
  1981年   3篇
  1980年   3篇
  1979年   4篇
  1977年   2篇
  1975年   2篇
  1973年   2篇
  1967年   2篇
  1961年   1篇
  1958年   1篇
  1956年   3篇
  1955年   1篇
排序方式: 共有308条查询结果,搜索用时 15 毫秒
81.
Based on the results of clinico-bacteriological and immunological studies carried out in the early neonatal period in 65 neonates afflicted with pyoinflammatory diseases and in their mothers, diagnostic criteria for intrauterine and early neonatal infection were elaborated. The significance played in this process of the character and level of microbial colonization of the amniotic fluid, placenta, labor tract of the mother, intrauterine antigenic stimulation of the fetus, changes in the peripheral blood and inflammatory alterations in the placenta was defined. Clinical, bacteriological and immunological prognostic criteria for the risk of the development of pyoinflammatory diseases in neonates were elaborated.  相似文献   
82.
TD Zavras  RP Mackenney  AA Amis   《The Knee》1995,2(4):211-217
The purpose of this study was to review the results of ACL reconstruction using a patellar tendon graft placed ‘over the top’ plus a Macintosh lateral tenodesis, examining changes in knee laxity and functional status with increasing time. There were 74 patients operated on over an 11 year period, and divided into four groups for analysis according to postoperative time. There was a significant and progressive increase in side-to-side laxity difference with time, although functional status did not change significantly, indicating a lack of correlation between objective clinical tests and subjective findings. The highest Lysholm, Tegner and IKDC scores were at 4–5 years after operation, when 60% of patients were at their pre-injury level of sports activity. However, there was always a very significant difference between actual and desired Tegner activity levels for the group as a whole. While there was a significant correlation between degenerative changes and the time between injury and reconstruction, there was no correlation with postoperative time: this provides evidence that ACL reconstruction can protect the knee from later degeneration.  相似文献   
83.
The incidence and prevalence of end-stage renal disease (ESRD) continues to increase, especially in the elderly population. The role of renovascular disease in contributing to ESRD is still not well defined. The objective of this study was to determine the utility of gadolinium (Gd)-enhanced magnetic resonance angiography (MRA) in evaluating elderly patients with renal insufficiency for renal artery stenosis (RAS). A 7-month prospective study conducted in a tertiary referral center evaluated 40 consecutive patients with progressive renal insufficiency (18 men and 22 women; mean age, 70 +/- 5.6 [standard deviation] years) and high clinical suspicion for renovascular disease with Gd-enhanced MRA. Digital subtraction angiography (DSA) was obtained in only those patients with significant RAS detected by MRA. Twelve patients had significant RAS. Six of these patients had percutaneous transluminal renal angioplasty (PTRA), five patients had renal artery bypass surgery, and one patient had a stent placed after PTRA. Seventy-eight renal arteries were satisfactorily evaluated by MRA. Twenty-two renal arteries were evaluated by both MRA and DSA. Of the 12 significant stenoses detected by the MRA, 11 were confirmed by DSA and 1 was confirmed at the time of surgical revascularization. It is concluded that Gd-enhanced MRA is a useful test for the evaluation of RAS in patients with compromised renal function.  相似文献   
84.
The effect of Neutrostim (preparation of granulocytic colony-stimulating factor) on recovery of myocardial tissue after acute myocardial infarction was studied in rats. A course of Neutrostim after ligation of the left coronary artery led to normalization of electrocardiographic and morphological parameters of the myocardium after one month.__________Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 139, No. 3, pp. 297–300, March, 2005  相似文献   
85.
86.
Seventy-two patients underwent hemodynamic testing before and after treatment for occlusive disease of their lower extremities. Percutaneous transluminal angioplasty (PTA) was used to treat lesions in 26 iliac segments and produced 23 initially improved ankle or upper thigh indices, two hemodynamic failures, and one technical failure; PTA for 54 femoropopliteal lesions produced initial hemodynamic improvement in 41 cases, three hemodynamic failures, and ten technical failures. Hemodynamic follow-up of the iliac segments showed improvement in 25 (92%) as measured by the systolic pressure index of the ankle; follow-up of the femoropopliteal segments showed continued patency of 41 (65.9%). The authors analyze these hemodynamic data.  相似文献   
87.
88.
89.
90.
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