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   497篇
  免费   72篇
  国内免费   2篇
耳鼻咽喉   30篇
儿科学   11篇
妇产科学   29篇
基础医学   98篇
口腔科学   14篇
临床医学   36篇
内科学   114篇
皮肤病学   3篇
神经病学   24篇
特种医学   8篇
外科学   79篇
综合类   7篇
预防医学   76篇
药学   17篇
肿瘤学   25篇
  2023年   3篇
  2021年   3篇
  2020年   5篇
  2018年   12篇
  2017年   4篇
  2016年   8篇
  2015年   3篇
  2014年   6篇
  2013年   6篇
  2012年   11篇
  2011年   13篇
  2010年   15篇
  2009年   21篇
  2008年   19篇
  2007年   23篇
  2006年   29篇
  2005年   19篇
  2004年   32篇
  2003年   35篇
  2002年   24篇
  2001年   16篇
  2000年   17篇
  1999年   22篇
  1998年   11篇
  1997年   12篇
  1996年   4篇
  1995年   11篇
  1994年   6篇
  1993年   10篇
  1992年   13篇
  1991年   4篇
  1990年   16篇
  1989年   14篇
  1988年   9篇
  1987年   19篇
  1986年   8篇
  1985年   6篇
  1984年   8篇
  1982年   3篇
  1981年   3篇
  1980年   5篇
  1979年   8篇
  1978年   3篇
  1977年   6篇
  1974年   4篇
  1973年   3篇
  1969年   5篇
  1968年   5篇
  1962年   2篇
  1893年   3篇
排序方式: 共有571条查询结果,搜索用时 218 毫秒
1.
A role for decorin in cutaneous wound healing and angiogenesis   总被引:2,自引:0,他引:2  
Decorin is known to influence tissue tensile strength and cellular phenotype. Therefore, decorin is likely to have an impact on tissue repair, including cutaneous wound healing. In this study, cutaneous healing of both excisional and incisional full‐thickness dermal wounds was studied in decorin‐deficient (Dcn?/?) animals. A statistically significant delay in excisional wound healing in the Dcn?/? mice occurred at 4 and 10 days postwounding and, in incisional wounds at 4, 10, and 18 days when compared with wild‐type (Dcn?/?) controls. Fibrovascular invasion into polyvinylalcohol sponges was significantly increased by day 18 in Dcn?/? mice relative to Dcn+/+ mice. The 18‐day sponge implants in the Dcn?/? mice showed a marked accumulation of biglycan when compared with the corresponding implants in Dcn+/+ mice. Thus, regulated production of decorin may serve as an excellent therapeutic approach for modifying impaired wound healing and harmful foreign body reactions.  相似文献   
2.
In 1987, die Department of Health in the UK set up a working party to identify reasons contributing to a shortfall in donor organs. One recommendation was reimbursement to the District Health Authorities for costs incurred in providing the donor organs. The figure chosen was not to be seen as an incentive to donate organs, merely as an appropriate compensation for the costs incurred. There would be no direct payment to doctors, trustees or relatives of the donor. With the development of the competitive health care environment in the United Kingdom, the reimbursement of donating hospital costs is being considered with these data.  相似文献   
3.
4.
At present, X-ray hysterosalpingography is used commonly as a screening method for testing Fallopian tube patency, but the results are often unreliable due to mucous plugs or muscular contractions. Selective catheterization of the tubes under X-ray control is feasible, but is rarely used due to exposure of young individuals aiming for pregnancy to a high ionizing dose. Here, a case is described of a patient whose Fallopian tubes were selectively catheterized and visualized three-dimensionally under contrast-enhanced magnetic resonance imaging (MRI) guidance using a high-viscous gadoteric acid solution (Dotarem). In this patient, bilateral peritubal adhesions caused a blockage of the fimbrial part of the tube leading to transuterine spilling of tubal fluid. Laparoscopy followed by bilateral salpingectomy was then performed, which confirmed the three-dimensional MRI images, and the excised specimens were examined histologically. The advantages of this novel technique include the avoidance of ionizing damage to the gonads and the potential for development of more elaborate interventional methods, such as ballooning and stenting. It is intended to develop contrast MRI further, both for improved non-invasive visualization and for manipulative technology of the Fallopian tubes.  相似文献   
5.
6.
7.
A monoclonal antibody raised against human colostrum secretory component produced even staining of hepatocyte plasma membranes, as well as bile duct lining cells, in all sections examined from eight normal and three abnormal human livers. Human bile samples incubated with free secretory component degraded it to varying extents, probably proteolytically; true levels of free secretory component will therefore often be higher than those reported. It seems likely that human liver resembles that of other mammals in transferring polymeric IgA through hepatocytes to the bile by means of the polymeric IgA receptor.  相似文献   
8.
A monoclonal antibody, produced by peptide immunisation was used to detect the distribution of p62c/myc by immunohistology in normal and coeliac small intestinal mucosa. The effect of gluten in four treated coeliac patients was investigated by taking serial jejunal biopsy specimens for six hours after a 10 g oral gluten challenge. There was a progressive increase in p62c/myc staining intensity in the villus enterocytes extending to the crypts, which accompanied the classical morphological changes occurring in the mucosa.  相似文献   
9.
In April 2018 the first German interdisciplinary S3 guideline for the diagnostics, treatment, and follow-up of patients with endometrial cancer was published. This article is a summary of Chap. 9 on “Surveillance/Recurrence/Metastases of Endometrial Cancer” and is a clinically oriented abbreviated version, which includes recommendations for investigation modalities in aftercare and treatment options in cases of recurrence. Also included are aspects of psycho-oncological support and palliative medical care from the S3 guideline.  相似文献   
10.
Summary. To test the hypothesis that hepatitis C virus (HCV) might induce hepatocyte proliferation directly, thereby predisposing HCV carriers to cirrhosis and hepatocellular carcinoma, we have used a new method to identify proliferating hepatocytes, employing a novel monoclonal antibody to minichromosome maintenance (Mcm) proteins, essential components of the pre-replication complex. Antibody to Ki-67, a conventional marker of cell division, was also studied. Eighty-seven patients with chronic HCV infection and a broad spectrum of histological change were studied. Proliferation was observed rarely in hepatocytes from normal liver from healthy controls (always less than 0.01%). However, proliferating hepatocytes were detected in all HCV-infected patients and the proportion of hepatocytes expressing Mcm-2 (3–40%) always exceeded that expressing Ki-67 (1–14%) and correlated positively with increasing stage of fibrosis ( P  = 0.0001) and viral replication ( P  = 0.0004). There were weaker but significant associations between the proportion of hepatocytes expressing Mcm-2 and inflammatory indices including interface hepatitis, portal tract inflammation, lobular inflammation and steatosis. There was no association between the proportion of hepatocytes expressing Mcm-2 and age, gender or past alcohol consumption, but there was a weak association with current consumption of alcohol ( P  = 0.0067). The proportion of Ki-67 hepatocytes did not correlate with any clinical, laboratory or histological parameter. Mcm-2 was also detected in bile duct cells, sinusoidal lining cells and infiltrating lymphocytes, but at low frequency. These data indicate first, that Mcm-2 is a more sensitive marker of hepatocyte proliferation than Ki-67, second that many hepatocytes in chronic HCV infection have entered the cell cycle and third, suggest that interference with the hepatocyte cell cycle might be an alternative approach to therapy.  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