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   381篇
  免费   58篇
  国内免费   9篇
儿科学   11篇
妇产科学   2篇
基础医学   58篇
口腔科学   17篇
临床医学   181篇
内科学   36篇
皮肤病学   1篇
神经病学   13篇
特种医学   40篇
外科学   30篇
综合类   1篇
预防医学   24篇
药学   15篇
中国医学   1篇
肿瘤学   18篇
  2023年   5篇
  2022年   3篇
  2021年   4篇
  2019年   2篇
  2018年   10篇
  2017年   10篇
  2016年   10篇
  2015年   13篇
  2014年   17篇
  2013年   14篇
  2012年   8篇
  2011年   4篇
  2010年   8篇
  2009年   15篇
  2008年   12篇
  2007年   15篇
  2006年   6篇
  2005年   5篇
  2004年   5篇
  2003年   2篇
  2002年   10篇
  2001年   9篇
  2000年   6篇
  1999年   16篇
  1998年   27篇
  1997年   23篇
  1996年   25篇
  1995年   12篇
  1994年   16篇
  1993年   12篇
  1992年   7篇
  1991年   6篇
  1990年   3篇
  1989年   9篇
  1988年   9篇
  1987年   12篇
  1986年   12篇
  1985年   13篇
  1984年   6篇
  1983年   7篇
  1982年   5篇
  1981年   6篇
  1980年   4篇
  1978年   2篇
  1977年   2篇
  1976年   4篇
  1973年   4篇
  1968年   2篇
  1966年   3篇
  1965年   2篇
排序方式: 共有448条查询结果,搜索用时 15 毫秒
51.
Normal cellular counterparts of B cell chronic lymphocytic leukemia   总被引:4,自引:0,他引:4  
In an attempt to compare B cell chronic lymphocytic leukemia (B-CLL) with its normal cellular counterpart, the cell surface phenotype of 100 cases of B-CLL was determined by using a panel of monoclonal antibodies (MoAbs) directed against B cell-restricted and -associated antigens. The majority of B-CLL cells expressed Ia, B4 (CD19), B1 (CD20), B2 (CD21), surface immunoglobulin (sIg), and T1 (CD5) but lacked C3b (CD35) receptors. In contrast, the overwhelming majority of small unstimulated B cells expressed Ia, B4, B1, B2, sIg, and C3b receptors but lacked detectable T1. Small numbers of weakly sIg+ cells could be identified in peripheral blood and tonsil that coexpressed the B1 and T1 antigens. Approximately 16% of fetal splenocytes coexpressed B1, T1, weak sIg, B2, and Ia but lacked C3b receptors and therefore closely resembled most B-CLL cells. With the phenotypic differences between the majority of small unstimulated B cells and B-CLL cells, we examined normal in vitro activated B cells and B-CLL cells for the expression of B cell-restricted and -associated activation antigens. Of 20 cases examined, virtually all expressed B5, and approximately 50% of the cases expressed interleukin-2 receptors (IL-2R) and Blast-1. Normal B cells were activated with either anti-Ig or 12-0-tetradecanoylphorbol- beta-acetate (TPA) and then were examined for coexpression of B1, T1, and the B cell activation antigens B5 and IL-2R. Only cells activated with TPA coexpressed B1 and T1 as well as B5 and IL-2R. B cells activated with either anti-Ig or TPA proliferated in the presence of IL- 2, whereas B-CLL cells did not, although they all expressed the identical 60-kilodalton proteins by immunoprecipitation. These studies are consistent with the notion that B-CLL resembles several minor subpopulations of normal B cells including a population of B cells that are activated in vitro directly through the protein kinase C pathway.  相似文献   
52.
53.
54.
Fibrosing alveolitis: CT-pathologic correlation   总被引:13,自引:0,他引:13  
Muller  NL; Miller  RR; Webb  WR; Evans  KG; Ostrow  DN 《Radiology》1986,160(3):585-588
Computed tomography (CT) was performed within 10 days of open lung biopsy in nine patients with fibrosing alveolitis. One-centimeter collimation contiguous scans through the chest were obtained in all patients. Additional 1.5-mm collimation scans were obtained in the area in which lung biopsy was later performed in six patients. In seven patients, CT demonstrated patchy involvement of the lung parenchyma, areas with a reticular pattern being intermingled with areas of normal lung. The reticular pattern was associated with cystic spaces 2-4 mm in diameter and was more severe in the lung periphery. Histologically, the reticular pattern corresponded to areas of irregular fibrosis. One patient had diffuse honeycombing (2-20-mm cysts), and one had honeycombing only in the lung periphery. In all patients, CT clearly defined the architectural changes seen on open lung biopsy. These changes were much better seen on the 1.5-mm than on the 10-mm collimation scans. CT may be helpful in determining the pattern and distribution of lung involvement in patients with fibrosing alveolitis and in guiding the surgeon to the most appropriate area(s) for biopsy.  相似文献   
55.
The changing academic role of the nurse teacher in the United Kingdom   总被引:1,自引:0,他引:1  
This paper presents findings from a national study conducted over a 3-year period (1991–94) which examined the changing role of the nurse teacher The study used multiple methods to collect data from a wide variety of respondents (nurse teachers, midwife teachers, clinical nurses, health service managers and higher education lecturers) This paper presents the findings relating to the development of the nurse teacher's academic role following the introduction of Project 2000 The issues presented and discussed include specialization within the nurse teacher's role, the nature of this specialization and the development of academic credibility and scholarship The implications of these changes in terms of the development of nursing as an academic subject area and the opportunity to contribute to the establishment of research based practice are explored  相似文献   
56.
The National Service Framework for the Older Person (Department of Health 2001) set standards for reducing the number of falls and serious injury. One way this might be achieved is through provision of a Specialist Falls Service. This paper describes a 3 year pilot project to introduce an Integrated Falls Service using money obtained from the local Health Authority Health Improvement fund.The article describes a partnership approach with the local council, therapy services and other agencies. The target group and referral mechanisms are discussed and costings given. A variety of interventions will be employed to include assessment and targeted exercises with education sessions. Hip protectors are available for high risk patients. Several indices will be used to evaluate this pilot scheme including balance measurements, confidence scales, supported interviews and diaries. Final evaluation will be in March 2004.  相似文献   
57.
Since Peplau outlined her perceptions of psychiatric/mental health nursing in (1952) interpersonal relationships has been considered by many as the core of practice. In the intervening period of almost a half century many researchers and theorists have endeavoured to develop and integrate Peplau's framework into day-to-day nursing activity. However, more recently, as a result of the fusion between the professional nursing agenda and the wider political agenda, the importance of interpersonal relationships and the individuality of psychiatric/mental health nursing is being questioned. This questioning is represented in the debate about the aetiology of mental illness, the choice of research methods to determine treatment outcomes and by association the role and value of the psychiatric/mental health nurse. This paper will focus on the interpersonal nature of psychiatric/mental health nursing and explore possible research approaches aimed at explicating its core. Attention will be given to the necessity of using pluralistic methodology in order to do so.  相似文献   
58.
The ability to manage change has become an essential skill for all managers, particularly those employed within the Health and Social Services. It is recognized that managers may have received an introduction to management concepts and skills within their professional education but require more specific management development. The government approach to adult education with an increased emphasis on vocational training as opposed to professional education (Hyland 1991) has had an important impact upon the theory and practice of nurse management. Nurses are now required to demonstrate, not only the appropriate knowledge and theory of management, but also the competencies necessary to fulfil their role. This is becoming an important dimension of management development programmes. This paper discusses aspects of competency based learning and considers how these concepts are applied to a higher education nurse management programme on 'Managing Change'. The difficulties experienced in applying vocational standards to professional education within the culture of a higher education will be explored, difficulties identified and some alternatives offered.  相似文献   
59.
60.
This paper argues that in their trainings health professionals are encouraged to use language naively as if it were a transparent medium of scientific communication We contend that language use, particularly in the field of mental health care, should be studied in terms of its social functions and attention should be paid to the inevitably constructive nature of language in patients'records, in order that a'fictional distance'opens up between patients and their records Recent developments in literary theory and narrative analysis can be deployed as theoretical frameworks to understand this process, and we suggest that more attention to the use of language should be included in the educational programmes for health care professionals to counteract the risk of'linguistic entrapment'or'incarceration'  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