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   272篇
  免费   37篇
耳鼻咽喉   1篇
儿科学   5篇
妇产科学   11篇
基础医学   41篇
口腔科学   6篇
临床医学   17篇
内科学   93篇
神经病学   9篇
特种医学   1篇
外科学   49篇
一般理论   1篇
预防医学   21篇
眼科学   11篇
药学   7篇
肿瘤学   36篇
  2024年   1篇
  2023年   7篇
  2022年   7篇
  2021年   19篇
  2020年   10篇
  2019年   10篇
  2018年   15篇
  2017年   7篇
  2016年   9篇
  2015年   12篇
  2014年   11篇
  2013年   10篇
  2012年   24篇
  2011年   16篇
  2010年   7篇
  2009年   3篇
  2008年   12篇
  2007年   25篇
  2006年   13篇
  2005年   13篇
  2004年   20篇
  2003年   13篇
  2002年   9篇
  2001年   2篇
  2000年   1篇
  1999年   2篇
  1998年   1篇
  1997年   1篇
  1996年   4篇
  1995年   1篇
  1994年   1篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   2篇
  1985年   1篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1981年   1篇
  1979年   1篇
  1978年   2篇
  1977年   1篇
  1976年   1篇
  1974年   1篇
  1970年   1篇
  1968年   1篇
  1966年   1篇
  1965年   1篇
  1963年   2篇
排序方式: 共有309条查询结果,搜索用时 15 毫秒
91.
92.
93.
The article addresses the strength and character of intergenerational family solidarity under different family cultures and welfare state regimes in order to answer the following two questions: (1) Is intergenerational solidarity stronger under the more collectivist southern family tradition than under the more individualist northern tradition? (2) Is more generous access to social care services a risk or a resource for family care? These questions are explored with data from the OASIS project, a comparative study among the urban populations aged 25+ (n=6,106) in Norway, England, Germany, Spain, and Israel. The findings indicate that the welfare state has not crowded out the family in elder care, but has rather helped the generations establish more independent relationships. Intergenerational solidarity is substantial in both the northern and southern welfare state regimes, and seems to vary in character more than in strength.  相似文献   
94.
To study the effects of device-guided breathing on office systolic blood pressure (SBP), five centers randomized 149 untrained hypertensives (50% male, age 59+/-10 years, baseline blood pressure 150+/-9/86+/-9 mm Hg, 77% taking drug therapy). One half received a device to guide slow breathing; all received a home blood pressure monitor and only simple, written instructions. The changes in office SBP (adjusted for office-to-home difference in baseline SBP and accumulated time spent in slow breathing, guided and measured by the device) were significantly (p<0.001 for trend) correlated with accumulated time spent in slow breathing. Greater decreases in SBP (-15.0+/-1.8 vs. -7.3+/-1.9 mm Hg) were observed for those who spent more (vs. less) than 180 minutes over 8 weeks in slow breathing, as well as those who just monitored their blood pressure at home (-9.2+/-1.6 mm Hg). Thus, even without training, hypertensive patients who receive a device to guide slow breathing significantly lowered their office SBP if the total time spent in slow breathing over 8 weeks exceeded a "threshold" value of 180 minutes.  相似文献   
95.
BACKGROUND: Inhibition of the renin-angiotensin system (RAS) prevents development of chronic allograft dysfunction in experimental animals. Whether this therapeutic approach is effective even if started when signs of allograft nephropathy are already manifested has not been investigated. METHODS: To address this issue, we studied the effect of a late treatment with the angiotensin-convertine enzyme (ACE) inhibitor trandolapril in the Fisher 344 to Lewis rat kidney transplant model. Seven months after transplant a renal biopsy was done for graft histology examination. Thereafter rats received either no treatment (allograft-none) or trandolapril until sacrifice at month 13. RESULTS: All animals were alive at the end of the study with the exception of a rat in the untreated group that died of renal insufficiency at day 292. Despite the fact that the grafts had already signs of structural injury and function impairment at the time treatment was stated, trandolapril completely restored renal function to baseline pretransplant values. Trandolapril also halted the progression of glomerular damage and suppressed intragraft T-lymphocyte infiltration and reduced the expression of the chemokine monocyte chemoattractant protein-1 (MCP-1). However, trandolapril had no direct effect on T cell function, since in vivo treatment did not modify recipient T-cell alloreactivity against donor antigens. CONCLUSION: These findings provide the basis for a novel treatment intervention with RAS blockade that, together with pharmacologic inhibition of the immune response, could interrupt progression of chronic allograft dysfunction and injury.  相似文献   
96.
Renin-angiotensin system (RAS) inhibitors are effective in reducing renal disease progression in early diabetic nephropathy, but they provide imperfect protection at a later stage. Due to the pivotal role of transforming growth factor-beta (TGF-beta) in the pathogenesis of diabetic kidney disease, this study tested the effect of simultaneously interrupting TGF-beta and angiotensin II on disease progression in diabetic rats with overt nephropathy. Diabetes was induced by streptozotocin injection in uninephrectomized rats. Diabetic rats received murine (1D11) or human (CAT-192) anti-TGF-beta monoclonal antibodies alone or in combination with lisinopril, 13C4 irrelevant murine antibody, saline or lisinopril from month 4 (when animals had proteinuria) to month 8. Normal animals served as controls. Systolic BP increase was controlled by single treatments and even more by the combined therapies. 1D11 and lisinopril kept proteinuria at levels numerically lower than irrelevant antibody and saline, while CAT-192 was ineffective. The addition of either TGF-beta antibody to lisinopril normalized proteinuria. Consistent results were obtained for glomerulosclerosis and tubular damage, which were abrogated by the combined therapy. Interstitial volume expansion and infiltration of lymphocytes/macrophages were limited by 1D11 and lisinopril and further reduced by their combination. The increase of type III collagen in the renal interstitium was partially attenuated by 1D11 and lisinopril while normalized by their combination. It is concluded that anti-TGF-beta antibody when added to a background of chronic angiotensin-converting enzyme (ACE) inhibition fully arrests proteinuria and renal injury of overt diabetic nephropathy, providing a novel route to therapy and remission of disease for diabetic patients who do not respond to RAS inhibition.  相似文献   
97.
98.
The pathology of the heart was studied in 60 patients dying in their tenth decade in a general hospital. The severity of coronary atherosclerosis and the incidence of ischaemic heart disease was lower than in younger geriatric patients. The incidence of minor ;aging' changes was similar to that in younger patients with the exception of mitral valve atheroma where the increase with aging continued into the tenth decade. Marked nodular thickening of the tricuspid valve was seen only in males. Over half the systolic murmurs heard were associated with mitral valve abnormalities and not with aortic valve changes. Multiple cardiac pathology was more frequent than in younger patients but its association with failure was much less striking. It is concluded that resistance to the development of coronary atherosclerosis and to failure being precipitated by the multiple minor cardiac abnormalities associated with aging are important factors in attaining extreme longevity.  相似文献   
99.
TUBERCULOMA OF THE INTERVENTRICULAR SEPTUM   总被引:3,自引:1,他引:2       下载免费PDF全文
  相似文献   
100.
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