全文获取类型
收费全文 | 617篇 |
免费 | 33篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 28篇 |
妇产科学 | 30篇 |
基础医学 | 38篇 |
口腔科学 | 18篇 |
临床医学 | 43篇 |
内科学 | 159篇 |
皮肤病学 | 2篇 |
神经病学 | 53篇 |
特种医学 | 12篇 |
外科学 | 87篇 |
综合类 | 10篇 |
预防医学 | 37篇 |
眼科学 | 60篇 |
药学 | 22篇 |
中国医学 | 19篇 |
肿瘤学 | 31篇 |
出版年
2024年 | 1篇 |
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 10篇 |
2020年 | 5篇 |
2019年 | 8篇 |
2018年 | 22篇 |
2017年 | 17篇 |
2016年 | 29篇 |
2015年 | 27篇 |
2014年 | 22篇 |
2013年 | 44篇 |
2012年 | 47篇 |
2011年 | 48篇 |
2010年 | 26篇 |
2009年 | 26篇 |
2008年 | 40篇 |
2007年 | 55篇 |
2006年 | 43篇 |
2005年 | 37篇 |
2004年 | 26篇 |
2003年 | 29篇 |
2002年 | 26篇 |
2001年 | 9篇 |
2000年 | 13篇 |
1999年 | 10篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1989年 | 3篇 |
1987年 | 2篇 |
1979年 | 1篇 |
1974年 | 1篇 |
1971年 | 2篇 |
排序方式: 共有658条查询结果,搜索用时 15 毫秒
11.
Knowledge,attitude and practice among Health Visitors in the United Kingdom toward children's oral health 下载免费PDF全文
12.
13.
14.
15.
We report a case of coronary artery bypass grafting (CABG) using the left internal mammary artery (LIMA) and a saphenous
vein graft in a 36-year-old man with Buerger's disease. He was hospitalized in the coronary intensive care unit with a diagnosis
of acute myocardial infarction. His coronary angiography showed total occlusion of the proximal segment of the left anterior
descending artery (LAD) and right coronary artery. Left ventricular dysfunction was detected by ventriculography. The patient
had undergone bilateral sympathectomy of the lumbar branches for distal arterial occlusions due to thromboangiitis obliterans
12 years previously. Under cardiopulmonary bypass and aortic cross-clamping, we performed endarterectomy and a complex bypass
procedure to LAD. Aorta-right coronary artery bypass was also applied. A histopathological study of an endarterectomy specimen
showed characteristic features of thromboangiitis obliterans. The postoperative course was uneventful and the patient was
discharged on the ninth postoperative day.
Received: November 19, 2001 / Accepted: February 16, 2002 相似文献
16.
Protective role of melatonin given either before ischemia or prior to reperfusion on intestinal ischemia-reperfusion damage 总被引:3,自引:0,他引:3
Ates B Yilmaz I Geckil H Iraz M Birincioglu M Fiskin K 《Journal of pineal research》2004,37(3):149-152
Tissue injury resulting from ischemia-reperfusion is of fundamental importance. Experimental evidence suggests that the generation of reactive oxygen species is significantly responsible for this type of injury. In the present study, besides investigating the protective role of melatonin on tissue damage caused by intestinal ischemia-reperfusion, the protective activity of this compound was also analyzed in both pre- and post ischemia melatonin-treated rats. The activities of the main antioxidative enzymes, catalase, superoxide dismutase and glutathione peroxidase in the intestine showed significant (P < 0.05) increases in melatonin-treated animals that were subjected to ischemia/reperfusion compared with those subjected only to ischemia/reperfusion. Also, results clearly indicate that the level of malondialdeyhde, an index of lipid peroxidation, decreased significantly (P < 0.05) when rats subjected to intestinal/reperfusion were given melatonin either before ischemia or before reperfusion. 相似文献
17.
The first diagnostic step in pleural effusions is the separation of transudates from exudates. We aimed in present study to investigate the value of HDL/LDL ratio for distinguishing between pleural exudates and transudates. Pleural fluids (PF)from 121 patients, including 28 transudates and 93 exudates were analyzed. The levels of cholesterol, HDL cholesterol and LDL cholesterol in PF were measured. The HDL/LDL ratio was calculated. HDL/LDL ratio found significantly higher in transudates than exudates (p= 0.001). Receiver operating characteristic (ROC) curves were generated and the cut off points determined to the highest level of accuracy and precision. The HDL/LDL ratio was to maximize sensitivity over specificity in the diagnosis of a transudative effusion. The usefulness of HDL/LDL ratio for identifying transudates was evaluated in terms of sensitivity and specificity. The value of pleural HDL/LDL ratio that best differentiated between transudates and exudates was 0.6 (sensitivity 89%, and specificity of 79%). Measurement of HDL and LDL in PF and calculating of HDL/LDL ratio can be proposed to aid for differentiation between pleural exudates and transudates with advantage of not requiring serum levels. 相似文献
18.
19.