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   635篇
  免费   47篇
  国内免费   21篇
耳鼻咽喉   1篇
儿科学   24篇
妇产科学   5篇
基础医学   59篇
口腔科学   30篇
临床医学   43篇
内科学   107篇
皮肤病学   13篇
神经病学   24篇
特种医学   95篇
外科学   56篇
综合类   49篇
预防医学   30篇
眼科学   6篇
药学   146篇
肿瘤学   15篇
  2022年   4篇
  2021年   2篇
  2020年   2篇
  2019年   4篇
  2018年   8篇
  2017年   5篇
  2016年   4篇
  2015年   8篇
  2014年   8篇
  2013年   19篇
  2012年   4篇
  2011年   12篇
  2010年   24篇
  2009年   24篇
  2008年   7篇
  2007年   31篇
  2006年   33篇
  2005年   11篇
  2004年   24篇
  2003年   16篇
  2002年   9篇
  2001年   13篇
  2000年   12篇
  1999年   13篇
  1998年   30篇
  1997年   33篇
  1996年   39篇
  1995年   24篇
  1994年   14篇
  1993年   20篇
  1992年   11篇
  1991年   10篇
  1990年   9篇
  1989年   27篇
  1988年   18篇
  1987年   18篇
  1986年   16篇
  1985年   18篇
  1984年   14篇
  1983年   10篇
  1982年   10篇
  1981年   8篇
  1980年   12篇
  1979年   14篇
  1978年   10篇
  1977年   10篇
  1976年   11篇
  1975年   12篇
  1973年   3篇
  1935年   1篇
排序方式: 共有703条查询结果,搜索用时 15 毫秒
71.
Background:  Permanent teeth pulp exposures have traditionally been treated with calcium hydroxide pulp capping. The aim of this study was to investigate the response of human pulp tissue which were mechanically exposed to a new material, Propolis and compare it with two existing and commonly used pulp capping agents (mineral trioxide aggregate and Dycal).
Methods:  Thirty-six intact human premolars were mechanically exposed. Teeth were divided into six groups of 6 teeth each and were capped with Propolis, mineral trioxide aggregate and Dycal. Final restoration was done with posterior composite resin using light cured glass ionomer cement as a liner. The teeth were then extracted on the 15th or the 45th day and processed for histological evaluation.
Results:  Differences in inflammatory response and dentine bridge formation of the exposed pulp to the three different materials were statistically calculated using chi-square test and were found to be non-significant. There was more pulp inflammation in teeth treated with Dycal than with Propolis and MTA on the 15th as well as on the 45th day. Propolis and MTA showed bridge formation in more teeth, and the bridges were in closer proximity to pulp capping material than teeth treated with Dycal on the 45th day.
Conclusions:  The response of pulps to Propolis as a pulp capping agent was comparable to MTA and Dycal.  相似文献   
72.

Problem

India has the world’s largest number of maternal deaths estimated at 117 000 per year. Past efforts to provide skilled birth attendants and emergency obstetric care in rural areas have not succeeded because obstetricians are not willing to be posted in government hospitals at subdistrict level.

Approach

We have documented an innovative public–private partnership scheme between the Government of Gujarat, in India, and private obstetricians practising in rural areas to provide delivery care to poor women.

Local setting

In April 2007, the majority of poor women delivered their babies at home without skilled care.

Relevant changes

More than 800 obstetricians joined the scheme and more than 176 000 poor women delivered in private facilities. We estimate that the coverage of deliveries among poor women under the scheme increased from 27% to 53% between April and October 2007. The programme is considered very successful and shows that these types of social health insurance programmes can be managed by the state health department without help from any insurance company or international donor.

Lessons learned

At least in some areas of India, it is possible to develop large-scale partnerships with the private sector to provide skilled birth attendants and emergency obstetric care to poor women at a relatively small cost. Poor women will take up the benefit of skilled delivery care rapidly, if they do not have to pay for it.  相似文献   
73.
背景及目的:Denosumab为一种人类单克隆抗体,它是核因子B配体(TANK)的受体激活剂(RANKL),RANKL,能够阻断该受体与RANK结合,从而抑制破骨细胞的生长及作用,减少骨的再吸收,增强骨密度.本研究分析了该药物对绝经后妇女骨质疏松症的预防作用.  相似文献   
74.
75.
Placenta increta, a rare complication of pregnancy, is associated with significant postpartum hemorrhage often requiring emergency hysterectomy. We report a case of conservative management, with a combination of parenteral methotrexate, serial ultrasound and Doppler assessment, followed by interval manual removal of placenta.  相似文献   
76.
77.
78.
Background: Haemophilus aphrophilus is a rare cause of ocular infection. It has been reported once as a cause of late-onset endophthalmitis in a patient with an inadvertent bleb after cataract surgery. We present a case of Haemophilus aphrophilus bleb infection after a mitomycin trabeculectomy.
Methods: A 56-year-old woman presented with a bleb infection 10 weeks after a mitomycin C augmented trabeculectomy at a University tertiary referral practice of one of the authors (GET). The causative organism was Haemophilus aphrophilus , identified by the Toronto Public Health Laboratory, Ontario, Canada.
Results: The bleb infection resolved following topical, subconjunctival and intravenous antibiotic therapy. A formal bleb revision was required to repair a persistent bleb leak.
Conclusion: Patients who have had trabeculectomies augmented with mitomycin C may be predisposed to bleb infection with unusual organisms. Prompt diagnosis and treatment is necessary to control the infection. Increased awareness and communication with laboratory personnel may increase the isolation of this fastidious organism.  相似文献   
79.
In order to test the hypothesis that integrin and uteroglobin (UG) expression in cultured endometrial cells are affected by hormone treatment, Ishikawa-CH endometrial cancer cells were cultured and exposed to oestradiol or oestradiol and progesterone regimens and assayed using immunohistochemistry. We evaluated the intensity of immunohistochemical staining for the integrin monomers alpha(v) and beta1, the dimers alpha(v)beta3 and alpha(v)beta6, and for the secretory protein uteroglobin under various experimental conditions. Cells grown in control media stained positively for the integrin monomers alpha(v) and beta1, the dimer alpha(v)beta3, and for UG. Oestradiol and sequential oestradiol/progesterone reversibly suppressed staining for the dimer alpha(v)beta3. Hormone treatment had no effect on the staining of the beta1 and alpha(v) monomers or UG. The alpha(v)beta6 dimer antibody did not stain under any experimental treatment conditions. These data indicate that expression of the integrin complex alpha(v)beta3 is reversibly suppressed by oestradiol in Ishikawa cells and that these cells may be a good model for studying hormone-driven molecular changes in endometrium.   相似文献   
80.
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