全文获取类型
收费全文 | 1145篇 |
免费 | 120篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 88篇 |
妇产科学 | 25篇 |
基础医学 | 167篇 |
口腔科学 | 46篇 |
临床医学 | 122篇 |
内科学 | 276篇 |
皮肤病学 | 20篇 |
神经病学 | 79篇 |
特种医学 | 131篇 |
外科学 | 68篇 |
综合类 | 19篇 |
一般理论 | 1篇 |
预防医学 | 64篇 |
眼科学 | 1篇 |
药学 | 107篇 |
中国医学 | 1篇 |
肿瘤学 | 48篇 |
出版年
2022年 | 11篇 |
2021年 | 11篇 |
2019年 | 10篇 |
2018年 | 18篇 |
2017年 | 15篇 |
2016年 | 16篇 |
2015年 | 29篇 |
2014年 | 29篇 |
2013年 | 38篇 |
2012年 | 40篇 |
2011年 | 36篇 |
2010年 | 62篇 |
2009年 | 31篇 |
2008年 | 37篇 |
2007年 | 35篇 |
2006年 | 30篇 |
2005年 | 24篇 |
2004年 | 24篇 |
2003年 | 22篇 |
2002年 | 14篇 |
2001年 | 21篇 |
2000年 | 21篇 |
1999年 | 16篇 |
1998年 | 31篇 |
1997年 | 41篇 |
1996年 | 29篇 |
1995年 | 37篇 |
1994年 | 28篇 |
1993年 | 41篇 |
1992年 | 23篇 |
1991年 | 23篇 |
1990年 | 35篇 |
1989年 | 31篇 |
1988年 | 41篇 |
1987年 | 26篇 |
1986年 | 22篇 |
1985年 | 32篇 |
1984年 | 15篇 |
1983年 | 18篇 |
1982年 | 24篇 |
1981年 | 23篇 |
1980年 | 15篇 |
1979年 | 22篇 |
1978年 | 15篇 |
1977年 | 8篇 |
1976年 | 16篇 |
1975年 | 7篇 |
1974年 | 8篇 |
1968年 | 9篇 |
1966年 | 7篇 |
排序方式: 共有1266条查询结果,搜索用时 15 毫秒
101.
Hermann B Seidenberg M Sager M Carlsson C Gidal B Sheth R Rutecki P Asthana S 《Epilepsia》2008,49(5):731-740
The purpose of this review is to examine what is known about cognitive and brain aging in elders with chronic epilepsy. We contend that much remains to be learned about the ultimate course of cognition and brain structure in persons with chronic epilepsy and concern appears warranted. Individuals with chronic epilepsy are exposed to many risk factors demonstrated to be associated with abnormal cognitive and brain aging in the general population, with many of these risk factors present in persons with chronic epilepsy as early as midlife. We suggest that a research agenda be developed to systematically identify and treat known modifiable risk factors in order to protect and promote cognitive and brain health in aging and elder persons with chronic epilepsy. 相似文献
102.
103.
104.
105.
William Clifford Roberts Brent Andrew Patterson Jong Mi Ko Rebecca Anne Sager Jason Andrew Clark Joseph Manuel Guileyardo 《Cardiovascular pathology》2010,19(3):187-190
Certain clinical and cardiac morphologic findings are presented in two men who developed massive right ventricular (RV) infarction with only minimal or no left ventricular infarction early after aortic valve replacement. The ostium of the right coronary artery was severely narrowed in one patient by the ring of the bioprosthesis, and in the other patient the right coronary artery was completely severed at the time of valve replacement without insertion of a coronary bypass conduit. Such massive infarction of the RV free wall has not been reported previously. 相似文献
106.
Testicular schistosomiasis caused by Schistosoma mansoni is very rare and more so when associated with primary infertility. A 40 years old man from the Jos Plateau, North Central Nigeria presented with primary infertility after ten years of marriage. Sperm count revealed oligospermia and he also complained of inability to sustain erection. Testicular biopsy revealed several ova of Schistosoma mansoni in the connective tissue of the testes. Cases of infertility in endemic areas especially when there is no supply of potable water should raise suspicion of schistosomiasis among other pathologies and possible hormonal disturbances when the testes are involved. 相似文献
107.
108.
The use of platelet-rich plasma (PRP) for improving of bone defect healing is discussed controversially. The aim of this study was to assess the effect of PRP in combination with autologous cancellous graft on bone defect healing in a critical metaphyseal long bone defect. A critical size defect in the tibial metaphysis of 16 mini-pigs was filled either with autologous cancellous graft as control group or with autologous cancellous graft combined with autologous PRP. Compared to native blood platelets were enriched about 4.9-fold in the PRP. After 6 weeks, the specimens were assessed by X-ray and histological evaluation. Histomorphometrical analysis revealed that the area of new bone was significantly higher in the PRP group concerning the central area of the defect zone (p < 0.02) as well as the cortical defect zone (p < 0.01). All defects showed substantial new bone formation, but only defects of the PRP group regenerated entirely. The PRP group was superior to the control group even in the semi-quantitative assessment of the osseous bridging in both observed areas of the defect. Within the limits of the present study it could be demonstrated that PRP combined with autologous cancellous graft leads to a significantly better bone regeneration compared to isolated application of autologous cancellous graft in an in vivo critical size defect on load-bearing long bones of mini-pigs. 相似文献
109.
110.
Hyperbaric oxygen therapy improves angiogenesis and bone formation in critical sized diaphyseal defects 下载免费PDF全文
JP Grassmann J Schneppendahl AR Hakimi M Herten M Betsch TT Lögters S Thelen M Sager M Wild J Windolf P Jungbluth M Hakimi 《Journal of orthopaedic research》2015,33(4):513-520
Besides the use of autologous bone grafting several osteoconductive and osteoinductive methods have been reported to improve bone healing. However, persistent non‐union occurs in a considerable number of cases and compromised angiogenesis is suspected to impede bone regeneration. Hyperbaric oxygen therapy (HBO) improves angiogenesis. This study evaluates the effects of HBO on bone defects treated with autologous bone grafting in a bone defect model in rabbits. Twenty‐four New‐Zealand White Rabbits were subjected to a unilateral critical sized diaphyseal radius bone defect and treated with autologous cancellous bone transplantation. The study groups were exposed to an additional HBO treatment regimen. Bone regeneration was evaluated radiologically and histologically at 3 and 6 weeks, angiogenesis was assessed by immunohistochemistry at three and six weeks. The additional administration of HBO resulted in a significantly increased new bone formation and angiogenesis compared to the sole treatment with autologous bone grafting. These results were apparent after three and six weeks of treatment. The addition of HBO therapy to autologous bone grafts leads to significantly improved bone regeneration. The increase in angiogenesis observed could play a crucial role for the results observed. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 33:513–520, 2015. 相似文献