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   1251篇
  免费   89篇
  国内免费   4篇
耳鼻咽喉   11篇
儿科学   90篇
妇产科学   28篇
基础医学   122篇
口腔科学   57篇
临床医学   82篇
内科学   268篇
皮肤病学   32篇
神经病学   27篇
特种医学   36篇
外科学   213篇
综合类   51篇
预防医学   63篇
眼科学   25篇
药学   162篇
中国医学   1篇
肿瘤学   76篇
  2021年   50篇
  2020年   15篇
  2019年   28篇
  2018年   34篇
  2017年   22篇
  2016年   27篇
  2015年   23篇
  2014年   33篇
  2013年   51篇
  2012年   84篇
  2011年   82篇
  2010年   41篇
  2009年   35篇
  2008年   59篇
  2007年   59篇
  2006年   68篇
  2005年   60篇
  2004年   54篇
  2003年   47篇
  2002年   35篇
  2001年   23篇
  2000年   27篇
  1999年   30篇
  1998年   21篇
  1997年   15篇
  1996年   13篇
  1994年   15篇
  1993年   11篇
  1992年   23篇
  1991年   20篇
  1990年   19篇
  1989年   25篇
  1988年   22篇
  1987年   14篇
  1986年   18篇
  1985年   10篇
  1984年   7篇
  1983年   5篇
  1982年   9篇
  1980年   8篇
  1979年   13篇
  1978年   9篇
  1977年   7篇
  1976年   7篇
  1975年   8篇
  1974年   9篇
  1971年   6篇
  1970年   6篇
  1969年   9篇
  1967年   5篇
排序方式: 共有1344条查询结果,搜索用时 15 毫秒
1.
neurogenetics - Human RNF213, which encodes the protein mysterin, is a known susceptibility gene for moyamoya disease (MMD), a cerebrovascular condition with occlusive lesions and compensatory...  相似文献   
2.
3.
4.
After resection at birth of an accessory left foot, a white male infant was followed up for a slowly enlarging posterior calf mass of the same leg. When the patient was 8 years old, the mass was thought to have enlarged sufficiently to warrant excisional biopsy. Histologic examination of the tumor was consistent with the diagnosis of a dermoid cyst, revealing a lesion lined with stratified squamous epithelium and containing cutaneous adnexal structures represented by eccrine sweat glands. A congenital dermoid in the extremities is unusual. The prognosis following removal is good, and recurrence is rare.  相似文献   
5.
Training needs analysis is considered essential to professional and organizational development, for continuing education and for incorporation into professional practice. Increasingly, nurses are encouraged to develop their health promotion role. Despite this there has been relatively little research in Scotland into the health promotion role of the hospital nurse. This study describes the results of a health promotion training needs analysis undertaken on qualified, hospital-based nurses in Lanarkshire, Scotland. Information on the nurses' current health promotion practices, their attitudes and beliefs, their views on role development and priorities for further training were collated, analysed and discussed within the framework of the Health Action Model. This model was originally designed to assist understanding of the gap that exists between an individual intention to act and the eventual health action. However, in this study the ways in which ‘cognitive factors’ (knowledge and beliefs) and ‘motivational factors’ (considering values, attitudes and drives) and pressures from social norms and significant others assisted in the understanding of the nurse's orientation to, and beliefs about, health promotion practice. Fifty-seven per cent of nurses in the study considered health promotion activities to be emerging in clinical care and 4% considered them to be advanced. The interest respondents have in role development and the further integration of health promotion activities into nursing practice was explored by ascertaining the nurses' attitudes and beliefs about their own health promotion role. Of 107 respondents, a majority 72 (67%) agreed health promotion interventions to be an important function of the nurse with 29 (27%) strongly agreeing (n=107). Sixty per cent stated they would be interested in developing their role and 30% were very strongly interested. Recommendations are therefore made for future planning and development strategies for the health promotion role of hospital nurses.  相似文献   
6.
Between November 1988 and February 1992, 416 patients required coronary endarterectomy for diffuse coronary artery disease. This constitutes 16.19 per cent of all patients who underwent coronary artery bypass grafting during the same period. A total of 528 endarterectomies were performed. Four-hundred and twenty-two endarterectomies were performed on right coronary system and 106 endarterectomies were performed on left coronary system. One-hundred and twelve (26.92%) patients required more than one endarterectomies. The hospital mortality was 2.16 percent. 3.37 per cent of patients had perioperative infarction. Intraaortic balloon pump was required in 1.92 per cent of patients. 5.77 per cent of the patients had significant arrhythmias. The patients have been followed up for a mean period of 27 months. One-hundred and forty patients were evaluated by exercise multigated radionuclide angiogram. One-hundred and thirty-four (95.71%) patients showed increase in ejection fraction as compared to preoperative value. Six (4.29%) patients did not show any significant change while eight (5.71%) patients had fall in ejection fraction. Postoperative coronary angiogram was done in 44 patients at a mean of 10 months. 89.59 per cent of grafts to the endarterectomised vessels and 91.67% of grafts to nonendarterectomised vessel were patent. The difference between the two groups was not statistically significant.  相似文献   
7.
A new series of N-(substituted)benzyl-1,8-naphthalimides 4, structurally related to the previously reported thymidylate synthase (TS) inhibitor naphthaleins 3, were synthesized and compounds tested for their inhibition of several species of TS. Moreover, their in vitro cytotoxicity together with antimycotic and antibacterial properties were assayed. While no activity was detected in the antibacterial tests, the m-nitro (4ae) and the p-nitro (4af) derivatives were found able to partially inhibit TS at low micromolar concentrations. Introduction of nitro or (substituted)-amino groups in position 4 of the naphthalic ring always led to less active compounds.  相似文献   
8.
9.
In our attempt to develop an “Essential Data Set” for a computer based information system to support Maternal & Child Health Care services an analysis of Swedish maternal care services was undertaken. The present study analyses the information system in the domain of maternal and child health care at the primary health center level with a view to identify areas where a computer-based medical record could effect improvements. The study showed that even in a well organized maternal care service as in Sweden lacunae exist in the information system. The paper forms, called MHV1, MHV2, MHV3 and FV1, though well designed, were incomplete in a large number of the cases. The MHV1 forms were completed in less than 45%, the MHV 2 form in 87.5% and the FV1 form in 70% of the cases. Certain elements of the data set were less likely to be completed than others. Another weak spot was the inaccessibility of the paper records during off-hours. These deficiencies could be eliminated by the use of a computerized medical record based on an essential data set.  相似文献   
10.
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