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   1301篇
  免费   80篇
  国内免费   1篇
耳鼻咽喉   8篇
儿科学   18篇
妇产科学   37篇
基础医学   195篇
口腔科学   57篇
临床医学   117篇
内科学   252篇
皮肤病学   20篇
神经病学   133篇
特种医学   30篇
外科学   140篇
综合类   20篇
预防医学   136篇
眼科学   35篇
药学   75篇
中国医学   4篇
肿瘤学   105篇
  2024年   1篇
  2023年   10篇
  2022年   22篇
  2021年   53篇
  2020年   28篇
  2019年   43篇
  2018年   50篇
  2017年   34篇
  2016年   40篇
  2015年   54篇
  2014年   59篇
  2013年   86篇
  2012年   131篇
  2011年   115篇
  2010年   58篇
  2009年   35篇
  2008年   96篇
  2007年   89篇
  2006年   76篇
  2005年   64篇
  2004年   63篇
  2003年   53篇
  2002年   44篇
  2001年   6篇
  2000年   8篇
  1999年   12篇
  1998年   5篇
  1997年   7篇
  1996年   6篇
  1995年   3篇
  1994年   1篇
  1993年   2篇
  1992年   2篇
  1991年   1篇
  1990年   3篇
  1989年   4篇
  1988年   2篇
  1986年   1篇
  1984年   1篇
  1980年   1篇
  1979年   3篇
  1978年   2篇
  1975年   1篇
  1973年   2篇
  1971年   2篇
  1970年   1篇
  1967年   2篇
排序方式: 共有1382条查询结果,搜索用时 31 毫秒
81.
BACKGROUND: The study of distorted beliefs about responsibility attitude and interpretation has become the central theme in Salkovskis' (1985) and Rachman and Hodgson's (1980) models of Obsessive-Compulsive Disorder (OCD). AIMS: The aim of this research is to assess the responsibility attitude in Iranian OCD patients. METHODS: Twenty OCD patients were selected through available sampling from the case referred to psychology clinics. Two other patient groups comprised of 20 non-OCD anxiety disorder patients and 20 non-clinical participants were also chosen as comparison groups. All participants completed the Responsibility Attitude Scale (RAS) and Responsibility Interpretation Questionnaire (RIQ). RESULTS: Analyses revealed statistically significant differences between OCD group and comparison groups on both RAS and RIQ. In addition, both RAS and RIQ scores were associated with the severity of OCD assessed by the Yale-Brown scale. CONCLUSIONS: These findings suggest that responsibility attitude and interpretations are the prominent features of OCD in Iranian patients and are associated with the severity of illness.  相似文献   
82.
Beta-blockers   总被引:1,自引:0,他引:1  
  相似文献   
83.
84.
85.
86.
Post-transplant diabetes mellitus (PTDM) is a frequent complication of renal transplantation. It has a prevalence rate ranging from 3 to 46%. We undertook a retrospective study of 175 nondiabetic renal transplant recipients to determine the prevalence rate, clinical characteristics, and risk factors of PTDM in kidney transplant recipients in our region. Thirty five patients (20%) developed PTDM, 50% were diagnosed by 3 months post transplantation. Eight patients (22.8%) were insulin recurrent. PTDM was independent of kidney source, family history of diabetes, age, sex, incidence of acute rejection, body weight gain, steroid or cyclosporine dose, use of beta-blockers and cytomegalovirus infection. Acturial 5 years survival was 79.4% in the diabetic compared to 80.5% in the control group. Patient survival was similar in the two groups. We conclude that PTDM is frequent in our patients. No significant risk factors of PTDM were identified in this study.  相似文献   
87.
Jaccoud's arthropathy (JA) is a chronic deformity affecting hands and feet, which are voluntarily correctable by the patients. JA was usually reported in association with rheumatic fever and systemic lupus erythematosus. We describe an exceptional association between a pyrophosphate arthropathy and JA of the hands. It is a 48-year-old woman, having a 13 years history of polyarthritis involving shoulders, elbows, hips and knees, and 4 years after, a progressive unlar deviation of the fingers of the hands. Calcium pyrophosphate dihydrate crystals were identified in the synovial knee biopsy. Hands x-rays as RMI don't identify erosions and confirmed the JA.  相似文献   
88.
The dissection of the descending aorta is a serious affection regarding to its mortality and its complications. It becomes chronic after the 14th day following the first signs of dissection. The authors report the case of a 55 years old patient who has presented a type III dissection diagnosed at the chronic period. The persistance of the pain has indicated the implantation of a stent at the intimal tear. This new endovascular treatement of the aorta diseases is a promising and less invasive alternative to the surgical treatement. It may reduce the morbidity and the mortality of this pathology but it needs an accurate and performant imaging techniques.  相似文献   
89.
Potter's reno-facial syndrome is a rare innate abnormality. We bring 4 observations repertoried at the maternity of military hospital of Tunis over a period of 6 years (1997 - 2002). The purpose of our work is to determine after a review of the literature the echographic and foetopathologic characteristics, and the forecast of this syndrome. The frequency of the bilateral renale agenesis is of 0.27 per thousand. Positive diagnosis bases essentially on the ultrasound of the 2th, or the 3-th trimester. The signs of appeal are essentially the oligoamnios associated to an hypotrophy. The caryotype is systematic to eliminate an associeted chromosomic abnormality. Foetopathologic exam is usefull for the diagnosis. Main abnormality except the urinary pathology is the lung hypoplasia. Therapeutic interruption of the pregnancy in this situation not compatible with the extra-uterine life., only type IV authorize the development of the pregnancy according to echographic data and of foetal urinaire biochemistry. We insist on the early practice of the morphological ultrasound between 20 - 22 weeks for the diagnosis of foetal abnormalities and the place of the genetic advice in association with the geneticist in the coverage of the couple.  相似文献   
90.
p53 can eliminate damaged cells through the induction of mitochondria-mediated apoptosis. Recent observations have provided strong evidence that a fraction of total p53 translocates to mitochondria specifically in response to a death stimulus. Unexpectedly, mutant p53, which is expressed at much higher levels than wild type in unstressed cells, is apparently always present at the mitochondria, independent of apoptotic signal. This prompted us to ask whether cell lines with intact p53-dependent apoptosis and cell cycle arrest pathways exist in which the mitochondrial localization of wild-type p53, like that of mutant, is independent of a death stimulus and instead, correlates with the total p53 levels. Here, we document that human HCT116 colorectal carcinoma cells treated with adriamycin or 5-fluorouracil (5FU) can accumulate total p53 to equally high levels, and mitochondrial p53 to proportionate levels, although only 5FU treatment provoked p53-dependent apoptosis. Along the same line, HCT116 derivatives with increased basal p53 levels, and glioblastoma cells with a doxycycline-inducible p53, also revealed proportionate mitochondrial p53 levels, and even unstressed HCT116 cells had some p53 located at the mitochondria. Finally, mitochondrial and total p53 showed distinct post-translational modifications. Thus, cell lines exist in which the mitochondrial p53 levels parallel total levels independent of apoptosis.  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