全文获取类型
收费全文 | 1476篇 |
免费 | 53篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 73篇 |
妇产科学 | 11篇 |
基础医学 | 143篇 |
口腔科学 | 24篇 |
临床医学 | 228篇 |
内科学 | 304篇 |
皮肤病学 | 33篇 |
神经病学 | 36篇 |
特种医学 | 301篇 |
外科学 | 74篇 |
综合类 | 27篇 |
预防医学 | 34篇 |
眼科学 | 182篇 |
药学 | 75篇 |
肿瘤学 | 64篇 |
出版年
2023年 | 3篇 |
2022年 | 6篇 |
2021年 | 12篇 |
2019年 | 12篇 |
2018年 | 10篇 |
2017年 | 11篇 |
2016年 | 12篇 |
2015年 | 23篇 |
2014年 | 13篇 |
2013年 | 29篇 |
2012年 | 18篇 |
2011年 | 21篇 |
2010年 | 56篇 |
2009年 | 48篇 |
2008年 | 37篇 |
2007年 | 75篇 |
2006年 | 33篇 |
2005年 | 42篇 |
2004年 | 18篇 |
2003年 | 32篇 |
2002年 | 27篇 |
2001年 | 23篇 |
2000年 | 25篇 |
1999年 | 32篇 |
1998年 | 94篇 |
1997年 | 88篇 |
1996年 | 111篇 |
1995年 | 84篇 |
1994年 | 88篇 |
1993年 | 74篇 |
1992年 | 25篇 |
1991年 | 40篇 |
1990年 | 30篇 |
1989年 | 35篇 |
1988年 | 39篇 |
1987年 | 30篇 |
1986年 | 39篇 |
1985年 | 38篇 |
1984年 | 19篇 |
1983年 | 23篇 |
1982年 | 24篇 |
1981年 | 23篇 |
1980年 | 20篇 |
1979年 | 5篇 |
1978年 | 14篇 |
1977年 | 17篇 |
1976年 | 13篇 |
1975年 | 7篇 |
1970年 | 2篇 |
1969年 | 2篇 |
排序方式: 共有1610条查询结果,搜索用时 15 毫秒
1.
2.
3.
The effect of currently available contact lens disinfection systems on Acanthamoeba castellanii and Acanthamoeba polyphaga 总被引:6,自引:0,他引:6
R E Silvany J M Dougherty J P McCulley T S Wood R W Bowman M B Moore 《Ophthalmology》1990,97(3):286-290
Contact lens disinfection systems were evaluated for their effectiveness in killing Acanthamoeba castellanii and Acanthamoeba polyphaga trophozoites and cysts. Amoebae were inoculated into commercially available contact lens cleaning and soaking solutions. At intervals varying from 30 minutes to 24 hours, solutions were filtered. The filters were removed and cultured for Acanthamoeba organisms. Striking differences were observed in the abilities of the different disinfecting solutions to kill the organisms. Solutions containing chlorhexidine were effective at very short exposure times. Solutions containing benzalkonium chloride required slightly longer exposure times but were faster than solutions containing only thimerosal. Solutions containing sorbate, polyaminopropyl biguanide, or polyquaternium-1 were not effective at killing Acanthamoeba organisms in the time allotted for the experiment. Solutions containing hydrogen peroxide were quite effective if the agent was not prematurely catalyzed. A. polyphaga generally required longer exposure to disinfectants than did A. castellanii for complete inhibition to occur. 相似文献
4.
Comparison of outcomes and donor-site morbidity in unilateral free TRAM versus DIEP flap breast reconstruction. 总被引:2,自引:0,他引:2
M V Schaverien A G B Perks S J McCulley 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(11):1219-1224
BACKGROUND: At long-term follow up we cannot easily differentiate between patients who have undergone free transverse rectus abdominis musculocutaneous (TRAM) flap and deep inferior epigastric artery perforator (DIEP) flap breast reconstruction in terms of subjective functional limitations of daily activities. The aim of this study was to evaluate postoperative outcomes and long-term subjective functional deficit in patients following unilateral free TRAM compared with DIEP flap breast reconstruction. METHODS: Sixty consecutive patients who underwent unilateral autologous breast reconstruction were included in the study, 30 of whom had undergone a DIEP flap, and 30 a free TRAM flap. Surgical and postoperative outcome data were collected and a postal questionnaire was sent to each patient at least 6 months postoperatively consisting of a short functional assessment questionnaire and a Short Form 36 (SF-36) survey. RESULTS: We found no significant difference in postoperative outcomes or in the subjective ability to perform activities of daily living, including work, domestic activities, sports and hobbies, between patients who underwent TRAM flap breast reconstruction and those who underwent a DIEP flap, and no significant difference between the groups for scores on the physical functioning, role-physical, or bodily pain scales of the SF-36. CONCLUSION: We conclude that harvesting of the free TRAM flap results in no significant difference in postoperative outcomes or in the subjective ability to perform activities of daily living compared with the DIEP flap. 相似文献
5.
6.
7.
8.
9.
10.