全文获取类型
收费全文 | 384篇 |
免费 | 41篇 |
国内免费 | 6篇 |
专业分类
儿科学 | 21篇 |
妇产科学 | 4篇 |
基础医学 | 34篇 |
口腔科学 | 3篇 |
临床医学 | 63篇 |
内科学 | 83篇 |
皮肤病学 | 40篇 |
神经病学 | 31篇 |
特种医学 | 27篇 |
外科学 | 45篇 |
综合类 | 20篇 |
预防医学 | 18篇 |
眼科学 | 7篇 |
药学 | 29篇 |
肿瘤学 | 6篇 |
出版年
2021年 | 5篇 |
2020年 | 6篇 |
2019年 | 11篇 |
2018年 | 11篇 |
2017年 | 11篇 |
2016年 | 4篇 |
2015年 | 11篇 |
2014年 | 10篇 |
2013年 | 14篇 |
2012年 | 17篇 |
2011年 | 15篇 |
2010年 | 15篇 |
2009年 | 19篇 |
2008年 | 18篇 |
2007年 | 27篇 |
2006年 | 26篇 |
2005年 | 22篇 |
2004年 | 17篇 |
2003年 | 13篇 |
2002年 | 10篇 |
2001年 | 11篇 |
2000年 | 12篇 |
1999年 | 10篇 |
1998年 | 4篇 |
1997年 | 13篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 9篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 5篇 |
1989年 | 6篇 |
1988年 | 6篇 |
1987年 | 9篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 2篇 |
1981年 | 4篇 |
1980年 | 1篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1948年 | 1篇 |
排序方式: 共有431条查询结果,搜索用时 31 毫秒
81.
M O'Mahony N D Noah B Evans D Harper B Rowe J A Lowes A Pearson B Goode 《The Journal of hygiene》1986,97(2):229-236
In an outbreak of gastroenteritis on board a cruise ship 251 passengers and 51 crew were affected and consulted the ship's surgeon during a 14-day period. There was a significant association between consumption of cabin tap water and reported illness in passengers. Enterotoxigenic Escherichia coli were isolated from passengers and crew and coliforms were found in the main water storage tank. Contamination of inadequately chlorinated water by sewage was the most likely source of infection. A low level of reported illness and late recognition of the outbreak delayed investigation of what was probably the latest in a series of outbreaks of gastrointestinal illness on board this ship. There is a need for a national surveillance programme which would monitor the extent of illness on board passenger cruise ships as well as a standard approach to the action taken when levels of reported illness rise above a defined level. 相似文献
82.
83.
84.
The trigonal polymorph of carbamazepine (alpha-carbamazepine) was obtained by crystallization from a number of solvents. It was characterized by means of differential scanning calorimetry, thermogravimetric analysis, infrared spectroscopy, X-ray power diffraction, thermal microscopy, and powder and intrinsic dissolution rates. The crystal and molecular structures were determined by single-crystal, three-dimensional X-ray analysis. A comparison is drawn between the physicochemical properties of the monoclinic (beta) and trigonal (alpha) forms. Structural features of carbamazepine occurring in these forms and in the acetone solvate are compared. Substantial differences were detected between the two polymorphic forms with regard to infrared and differential scanning calorimetry data, thermomicroscopical behavior, morphology, and molecular conformation. 相似文献
85.
86.
87.
Lesley Lowes PhD Michael R. Robling PhD Kristina Bennert PhD Charlotte Crawley BA PGCE Helen Hambly MSc Kamila Hawthorne MD John W. Gregory MD and the DEPICTED Study Team 《Health expectations》2011,14(3):250-260
Aim This paper focuses on stakeholders’ active involvement at key stages of the research as members of a Stakeholder Action Group (SAG), particularly in the context of lay stakeholder involvement. Some challenges that can arise and wider issues (e.g. empowerment, the impact of user involvement) are identified and explored within the literature on service user involvement in health care research, reflecting on the implications for researchers. Background In the DEPICTED study, lay and professional stakeholders were actively involved in developing a complex research intervention. Lay stakeholders comprised teenage and adult patients with diabetes, parents and patient organization representatives. Professional stakeholders were from a range of disciplines. Methods Three 1‐day research meetings were attended by 13–17 lay stakeholders and 10–11 professional stakeholders (plus researchers). The SAG was responsible for reviewing evidence, advising on developing ideas for the research intervention and guiding plans for evaluation of the intervention in a subsequent trial. Formal evaluations were completed by stakeholders following each SAG meeting. Results Throughout the first (developmental) stage of this two‐stage study, lay and professional stakeholders participated or were actively involved in activities that provided data to inform the research intervention. Lay stakeholders identified the need for and contributed to the design of a patient‐held tool, strongly influenced the detailed design and content of the research intervention and outcome questionnaire, thus making a major contribution to the trial design. Conclusion Stakeholders, including teenagers, can be actively involved in designing a research intervention and impact significantly on study outcomes. 相似文献
88.
89.
90.