全文获取类型
收费全文 | 1056篇 |
免费 | 58篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 84篇 |
儿科学 | 41篇 |
妇产科学 | 70篇 |
基础医学 | 57篇 |
口腔科学 | 13篇 |
临床医学 | 171篇 |
内科学 | 111篇 |
皮肤病学 | 10篇 |
神经病学 | 19篇 |
特种医学 | 100篇 |
外科学 | 195篇 |
综合类 | 66篇 |
预防医学 | 37篇 |
眼科学 | 63篇 |
药学 | 51篇 |
肿瘤学 | 34篇 |
出版年
2022年 | 11篇 |
2021年 | 15篇 |
2020年 | 11篇 |
2019年 | 11篇 |
2018年 | 18篇 |
2017年 | 17篇 |
2016年 | 15篇 |
2015年 | 33篇 |
2014年 | 23篇 |
2013年 | 25篇 |
2012年 | 34篇 |
2011年 | 42篇 |
2010年 | 37篇 |
2009年 | 41篇 |
2008年 | 42篇 |
2007年 | 63篇 |
2006年 | 46篇 |
2005年 | 45篇 |
2004年 | 37篇 |
2003年 | 39篇 |
2002年 | 44篇 |
2001年 | 32篇 |
2000年 | 46篇 |
1999年 | 39篇 |
1998年 | 36篇 |
1997年 | 32篇 |
1996年 | 21篇 |
1995年 | 21篇 |
1994年 | 17篇 |
1993年 | 10篇 |
1992年 | 17篇 |
1991年 | 9篇 |
1990年 | 7篇 |
1989年 | 27篇 |
1988年 | 18篇 |
1987年 | 17篇 |
1986年 | 16篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1983年 | 11篇 |
1982年 | 7篇 |
1981年 | 6篇 |
1980年 | 7篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1976年 | 6篇 |
1975年 | 11篇 |
1974年 | 7篇 |
1972年 | 4篇 |
1966年 | 3篇 |
排序方式: 共有1122条查询结果,搜索用时 15 毫秒
1.
2.
The purpose of this study is to show the spectrum of adjacent organ invasion and to make a brief review of hepatic alveolar hydatid disease (AHD), using CT and MR imaging. We retrospectively reviewed CT and MR images of three patients with various adjacent organ invasions surgically and histologically proven to be AHD. Local invasion to right kidney and adrenal, right hemidiaphragm and lung were detected in one patient, right adrenal in another patient and gall bladder, duodenum, gastric wall and pancreas invasion in the other. AHD may rarely extend to the gall bladder, stomach, duodenum, pancreas, right adrenal and kidney, diaphragm, pleura and lung. The extension of the disease outside the liver is usually encountered in patients with large, peripherally located masses in the advanced stage of the disease. 相似文献
3.
4.
Objectives/Hypothesis: Vocal rehabilitation of patients who have undergone laryngectomy is best accomplished by a tracheoesophageal puncture. Optimal function of the prosthesis requires an adequate stoma. Patients with tracheostomal stenosis require revision of the stoma if vocal rehabilitation is to take place. Revision and tracheoesophageal placement are usually done as two separate procedures. Creating a tracheoesophageal fistula at the time of stomal revision has not been addressed in the literature. Study Design: Prospective analysis and follow-up of 10 patients undergoing simultaneous tracheoesophageal puncture and stomal revision for tracheostomal stenosis between 1991 and 1996. Methods: Ten patients were reviewed. An inferiorly based V-Y advancement flap was used so as not to interfere with the tracheoesophageal puncture. All patients had received radiation prior to revision and tracheoesophageal puncture. Patients were followed for a minimum of 2 years (range, 2–6 y; median, 3 y). Results: All patients maintained an adequate stoma without stenting. Eight of ten patients (80%) developed and maintained good tracheoesophageal speech. Two patients had their speech fistulas removed. There were no intraoperative or postoperative complications. Conclusions: Creation of a tracheoesophageal fistula at the time of stomal revision allows for vocal rehabilitation with a single visit to the operating room. Laryngoscope, 108:1509-1513, 1998 相似文献
5.
6.
C McKenzie BAppSc P Megaw BAppSc I Morgan PhD MK Boelen PhD 《Clinical & experimental ophthalmology》1997,25(4):79-81
Deprivation of form vision by the fitting of translucent occluders suppressed the diurnal cycling of enkephalinergic amacrine cells (the ENSLI amacrine cells), in the chicken. Daily periods of normal vision or enforcing temporal contrast using strobe lighting appeared to restore normal functioning of the ENSLI cells. These results suggest that the ENSLI cells are involved in retinal circuits that assess the quality of the visual image and control eye growth. 相似文献
7.
8.
9.
10.
A BALB/c congenic strain of mice that carries a genetic locus (Ityr) controlling resistance to intracellular parasites. 总被引:10,自引:14,他引:10
下载免费PDF全文
![点击此处可从《Infection and immunity》网站下载免费的PDF全文](/ch/ext_images/free.gif)
M Potter A D O''''Brien E Skamene P Gros A Forget P A Kongshavn J S Wax 《Infection and immunity》1983,40(3):1234-1235
BALB/c.DBA/2 Idh-1b-Ityr-Pep-3b congenic mice were developed by introgressively backcrossing the Idh-1b and Pep-3b markers of DBA/2 mice onto the BALB/c pi mice. This introduced a 30-centimorgan chromosome 1 segment of DBA/2 chromatin that contained the Ityr gene. BALB/c.DBA/2 Idh-1b-Ityr-Pep-3b mice were resistant to in vivo infections by Salmonella typhimurium, Mycobacterium bovis, and Leishmania donovani. 相似文献