全文获取类型
收费全文 | 683篇 |
免费 | 42篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 41篇 |
妇产科学 | 23篇 |
基础医学 | 93篇 |
口腔科学 | 28篇 |
临床医学 | 46篇 |
内科学 | 122篇 |
皮肤病学 | 16篇 |
神经病学 | 11篇 |
特种医学 | 144篇 |
外国民族医学 | 1篇 |
外科学 | 44篇 |
综合类 | 50篇 |
预防医学 | 46篇 |
眼科学 | 5篇 |
药学 | 22篇 |
中国医学 | 4篇 |
肿瘤学 | 32篇 |
出版年
2021年 | 8篇 |
2020年 | 6篇 |
2019年 | 5篇 |
2018年 | 13篇 |
2017年 | 11篇 |
2016年 | 15篇 |
2015年 | 13篇 |
2014年 | 23篇 |
2013年 | 36篇 |
2012年 | 28篇 |
2011年 | 25篇 |
2010年 | 44篇 |
2009年 | 48篇 |
2008年 | 26篇 |
2007年 | 25篇 |
2006年 | 9篇 |
2005年 | 7篇 |
2004年 | 5篇 |
2003年 | 4篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 5篇 |
1999年 | 7篇 |
1998年 | 35篇 |
1997年 | 33篇 |
1996年 | 34篇 |
1995年 | 35篇 |
1994年 | 23篇 |
1993年 | 20篇 |
1992年 | 4篇 |
1991年 | 4篇 |
1990年 | 7篇 |
1989年 | 15篇 |
1988年 | 14篇 |
1987年 | 10篇 |
1986年 | 13篇 |
1985年 | 9篇 |
1984年 | 12篇 |
1983年 | 14篇 |
1982年 | 12篇 |
1981年 | 13篇 |
1980年 | 15篇 |
1979年 | 4篇 |
1978年 | 8篇 |
1977年 | 2篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1968年 | 2篇 |
1950年 | 1篇 |
1949年 | 1篇 |
排序方式: 共有729条查询结果,搜索用时 15 毫秒
91.
92.
Superficial- and deep-tissue heating was measured in five dogs during high-specific-absorption-rate radiofrequency (RF) irradiation to see whether significant temperature changes could be produced by a 1.5-T clinical magnetic resonance imager. The RF power output employed was 6.3 times that required for routine imaging. Temperature probes were placed in both deep and superficial tissues, and temperatures were recorded before, during, and after exposure. In each dog, there was a linear temperature increase of several degrees during RF exposure; the maximal average change was 4.6 degrees C in the urinary bladder. The temperature increase was slightly greater in deep tissues than in superficial tissues. The calculated specific absorption rate, based on the temperature change, averaged 7.9 W/kg for all five dogs. These findings argue for continued caution in the design and operation of imagers capable of high specific absorption rates, particularly when they are used for imaging infants or patients with altered thermoregulatory capability. 相似文献
93.
Large and medium-sized blood vessels can be identified on extracranial computed tomographic (CT) scans when a combination of infusion and bolus injection of conventional contrast material is administered. The cases illustrated in this report show that CT angiography can sometimes offer clinically useful information not present on CT scans obtained without contrast injection. 相似文献
94.
95.
S Chaudhury S Sharma AA Pawar BK Kumar Mrs K Srivastava S Sudarsanan D Singh 《Medical Journal Armed Forces India》2006,62(3):220-223
Background
Psychological effects of Coronary Artery Bypass graft (CABG) have been of interest all over the world but there is a paucity of Indian work.Methods
30 patients undergoing CABG at a service hospital were included. All patients filled a specially designed proforma. Mini Mental Status Examination, Hospital anxiety and depression scale, Coronary scale, Seattle angina questionnaire and Euro-QOL 5D were performed before and seven days after CABG.Results
43.3% had significant anxiety and 30% had significant depression before CABG. Following CABG, 36.67% of the patients had significant anxiety while 40% had significant depression. On the Seattle angina questionnaire, physical limitation reduced from 71.6 ± 7.9 to 53.1 ± 14.6. There was significant improvement in treatment satisfaction from 37.8 ± 6.1 to 59.4 ± 4.2 following CABG. On th euro quality of life scale (EQ5D) health status improved from 38.17 ± 9.51 before CABG to 68.5 ± 5.28 after CABG.Conclusion
There is a significant incidence of anxiety and depression in patients undergoing CABG, both before and after surgery.Key Words: CABG, anxiety, depression 相似文献96.
97.
98.
99.
100.
R Alexander A Kerby AA Aubdool AR Power S Grover C Gentry AD Grant 《British journal of pharmacology》2013,168(3):761-772