全文获取类型
| 收费全文 | 531487篇 |
| 免费 | 35385篇 |
| 国内免费 | 640篇 |
专业分类
| 耳鼻咽喉 | 7065篇 |
| 儿科学 | 17518篇 |
| 妇产科学 | 14115篇 |
| 基础医学 | 87460篇 |
| 口腔科学 | 14679篇 |
| 临床医学 | 46737篇 |
| 内科学 | 96708篇 |
| 皮肤病学 | 12441篇 |
| 神经病学 | 38334篇 |
| 特种医学 | 18802篇 |
| 外国民族医学 | 63篇 |
| 外科学 | 78697篇 |
| 综合类 | 8648篇 |
| 现状与发展 | 1篇 |
| 一般理论 | 137篇 |
| 预防医学 | 41671篇 |
| 眼科学 | 12301篇 |
| 药学 | 41698篇 |
| 1篇 | |
| 中国医学 | 1021篇 |
| 肿瘤学 | 29415篇 |
出版年
| 2018年 | 5661篇 |
| 2016年 | 4690篇 |
| 2015年 | 5140篇 |
| 2014年 | 6822篇 |
| 2013年 | 10727篇 |
| 2012年 | 14536篇 |
| 2011年 | 15945篇 |
| 2010年 | 9131篇 |
| 2009年 | 8495篇 |
| 2008年 | 14802篇 |
| 2007年 | 15892篇 |
| 2006年 | 15991篇 |
| 2005年 | 15326篇 |
| 2004年 | 14937篇 |
| 2003年 | 14135篇 |
| 2002年 | 13992篇 |
| 2001年 | 24159篇 |
| 2000年 | 25150篇 |
| 1999年 | 20648篇 |
| 1998年 | 5553篇 |
| 1997年 | 4812篇 |
| 1996年 | 5114篇 |
| 1995年 | 4694篇 |
| 1994年 | 4368篇 |
| 1992年 | 15767篇 |
| 1991年 | 16334篇 |
| 1990年 | 16440篇 |
| 1989年 | 15825篇 |
| 1988年 | 14602篇 |
| 1987年 | 14447篇 |
| 1986年 | 13628篇 |
| 1985年 | 12992篇 |
| 1984年 | 9670篇 |
| 1983年 | 8264篇 |
| 1982年 | 4594篇 |
| 1981年 | 4264篇 |
| 1979年 | 9431篇 |
| 1978年 | 6868篇 |
| 1977年 | 5779篇 |
| 1976年 | 5613篇 |
| 1975年 | 6415篇 |
| 1974年 | 7638篇 |
| 1973年 | 7134篇 |
| 1972年 | 6961篇 |
| 1971年 | 6688篇 |
| 1970年 | 6175篇 |
| 1969年 | 5889篇 |
| 1968年 | 5561篇 |
| 1967年 | 5015篇 |
| 1966年 | 4451篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
91.
Objective
The aim of this paper is to study the opportunity costs (OC) that are involved in being a caregiver and to compare them with the direct costs assumed by the State and the families. We evaluate direct cost (those that imply a payment-out-of-pocket) and indirect cost (those that imply a dedication in time). We hypothesized that costs increase with the severity of the dementia, with the educational level and active occupational situation of caregiver. They are greater if the caregiver is male, but if the patient and caregiver cohabit they are reduced.Method
778 surveys were analyzed. Data was collected using a questionnaire specifically designed for the purpose, with the collaboration of Alzheimer's Diseases Associations in Andalusia (Spain). For the indirect cost, we used the reveal preferences method. For the comparison between groups an ANOVA and a MANOVA was done.Results
The hypotheses were confirmed. The OC exponentially increases with severity. More than 55% of costs are assumed by families. Occupied people have higher educational level and incomes and contract more external support. Costs are significantly higher for male caregivers. Cohabiting reduces all kinds of costs.Conclusions
The relationship between educational level and employment situation lead to think that if these variables are greater more people will seek professional support. Cultural reasons still maintain women as main caregivers for all educational levels. The existence of these informal caregivers as the main care providers is a saving for the State, and a brake for the development of professional supply. 相似文献92.
93.
94.
95.
96.
Pulina N. A. Kuznetsov A. S. Krasnova A. I. Novikova V. V. 《Pharmaceutical Chemistry Journal》2019,53(3):220-224
Pharmaceutical Chemistry Journal - N-Substituted 4-aryl-2-hydroxy-4-oxobut-2-enoic acid hydrazides and their complexes with Ni(II), Mn(II), Co(II), Cu(II), and Zn(II) were prepared. Their... 相似文献
97.
98.
99.
Letter: faecal volatile organic metabolites,promising biomarkers in inflammatory bowel disease and Letter: faecal volatile organic metabolites as novel diagnostic biomarkers in inflammatory bowel disease. Authors’ reply 
下载免费PDF全文
下载免费PDF全文 I. Ahmed R. Greenwood B. Costello N. Ratcliffe C. Probert 《Alimentary pharmacology & therapeutics》2016,43(11):1241-1242