全文获取类型
收费全文 | 8304篇 |
免费 | 320篇 |
国内免费 | 58篇 |
专业分类
耳鼻咽喉 | 250篇 |
儿科学 | 438篇 |
妇产科学 | 426篇 |
基础医学 | 540篇 |
口腔科学 | 449篇 |
临床医学 | 743篇 |
内科学 | 1963篇 |
皮肤病学 | 107篇 |
神经病学 | 456篇 |
特种医学 | 300篇 |
外科学 | 1853篇 |
综合类 | 126篇 |
预防医学 | 173篇 |
眼科学 | 262篇 |
药学 | 315篇 |
中国医学 | 10篇 |
肿瘤学 | 271篇 |
出版年
2024年 | 5篇 |
2023年 | 68篇 |
2022年 | 106篇 |
2021年 | 195篇 |
2020年 | 121篇 |
2019年 | 180篇 |
2018年 | 211篇 |
2017年 | 177篇 |
2016年 | 242篇 |
2015年 | 285篇 |
2014年 | 310篇 |
2013年 | 401篇 |
2012年 | 577篇 |
2011年 | 562篇 |
2010年 | 348篇 |
2009年 | 287篇 |
2008年 | 667篇 |
2007年 | 720篇 |
2006年 | 674篇 |
2005年 | 639篇 |
2004年 | 514篇 |
2003年 | 445篇 |
2002年 | 352篇 |
2001年 | 140篇 |
2000年 | 126篇 |
1999年 | 117篇 |
1998年 | 46篇 |
1997年 | 36篇 |
1996年 | 27篇 |
1995年 | 9篇 |
1994年 | 16篇 |
1993年 | 15篇 |
1992年 | 13篇 |
1991年 | 17篇 |
1990年 | 10篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1973年 | 2篇 |
1971年 | 3篇 |
1970年 | 2篇 |
1969年 | 1篇 |
排序方式: 共有8682条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
Targeting in a cellular level is still one of the major challenges in biomedical treatments. However, new synthetic and analytical techniques now allow the development of precisely prepared macromolecules. Thus, glycopolymer chains are reported to be prepared with controlled length, monomer sequences, as well as chain‐folded structures. A high level of complexity in synthetic macromolecules also allows increased selectivity in targeting, which is a key factor in biomedical applications. 相似文献
7.
Oral Saygun Serdar Topaloglu Fatih M Avsar Hakan Ozel Sema Hucumenoglu Mustafa Sahin Suleyman Hengirmen 《Canadian journal of surgery》2006,49(2):107-112
BACKGROUND: Most duodenal injuries are managed with primary repair, but the degree of duodenal-wall injury may threaten the integrity of the primary repair. Therefore, we evaluated whether the primary repair site could be reinforced with histoacryl glue (HAG) or HAG with an expanded polytetrafluoroethylene (ePTFE) mesh. METHODS: Grade 3 duodenal injury in the second portion of the rat duodenum was chosen as a standard trauma model. Thirty-three male rats were divided into sham (n = 3), 2-layer primary repair (n = 10), 1-layer primary repair plus HAG application (n = 10) and ePTFE attached with HAG over the 1-layer primary repair site (n = 10) groups. Ten-day survival, adhesion grades and histological assessment were taken as outcome measures. RESULTS: A significant survival advantage was identified in the group that had an ePTFE graft attached with HAG over a 1-layer repair when compared with the group that had a 2-layer primary repair. Adhesion grades were found to be particularly increased in the group that had an ePTFE graft attached with HAG over the primary repair site, moderately increased in the primary repair plus HAG application group and lower in the 2-layer primary repair group. ePTFE graft application was found to be beneficial to coverage of the HAG-dependent empty spaces in the serosal layer. CONCLUSIONS: A primary repair site after duodenal trauma or a difficult duodenal stump can be reinforced with the application of HAG or ePTFE graft implantation with HAG. 相似文献
8.
Vedat Davutoglu Serdar Soydinc Abdullah Aydin Metin Karakok 《Journal of the American Society of Echocardiography》2005,18(2):185-187
The exposure to Aspergillus organisms/spores is likely common, but disease caused by tissue invasion with these fungi is uncommon and occurs primarily in the setting of immunosuppression. We report a case of rapidly advancing invasive endomyocardial aspergillosis secondary to prolonged usage of multiple broad-spectrum antibiotics in a nonimmunocompromised host. A 36-year-old cotton textile worker presented to our institution with a 3-month history of weight loss and fatigue. He reported receiving prolonged use of multiple broad-spectrum antibiotic treatment. The echocardiogram demonstrated multiple endomyocardial vegetations and a mass in the left atrium. Myocardial biopsy specimen revealed an invasive endomyocardial aspergillosis. The patient was investigated for immune deficiency including HIV, and this workup was negative. Treatment was started with amphotericin B and heparin for presumed left atrial thrombus. The patient died because of a rupture of mycotic aneurysm that resulted in cerebral hemorrhage. This case illustrates the risk of an invasive fungal infection in a nonimmunocompromised host who is a prolonged user of antibiotics in the setting of environmental exposure of opportunistic invasive fungal infections. 相似文献
9.
10.