全文获取类型
收费全文 | 1306篇 |
免费 | 186篇 |
国内免费 | 61篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 47篇 |
妇产科学 | 22篇 |
基础医学 | 275篇 |
口腔科学 | 28篇 |
临床医学 | 180篇 |
内科学 | 247篇 |
皮肤病学 | 13篇 |
神经病学 | 79篇 |
特种医学 | 113篇 |
外科学 | 236篇 |
综合类 | 41篇 |
预防医学 | 119篇 |
眼科学 | 6篇 |
药学 | 80篇 |
中国医学 | 1篇 |
肿瘤学 | 52篇 |
出版年
2021年 | 19篇 |
2019年 | 19篇 |
2018年 | 22篇 |
2017年 | 16篇 |
2016年 | 19篇 |
2015年 | 21篇 |
2014年 | 21篇 |
2013年 | 65篇 |
2012年 | 50篇 |
2011年 | 53篇 |
2010年 | 40篇 |
2009年 | 29篇 |
2008年 | 34篇 |
2007年 | 69篇 |
2006年 | 50篇 |
2005年 | 36篇 |
2004年 | 35篇 |
2003年 | 30篇 |
2002年 | 38篇 |
2001年 | 37篇 |
2000年 | 30篇 |
1999年 | 43篇 |
1998年 | 38篇 |
1997年 | 48篇 |
1996年 | 37篇 |
1995年 | 38篇 |
1994年 | 27篇 |
1993年 | 38篇 |
1992年 | 33篇 |
1991年 | 36篇 |
1990年 | 42篇 |
1989年 | 44篇 |
1988年 | 38篇 |
1987年 | 23篇 |
1986年 | 26篇 |
1985年 | 16篇 |
1984年 | 22篇 |
1983年 | 20篇 |
1982年 | 17篇 |
1981年 | 13篇 |
1980年 | 17篇 |
1979年 | 17篇 |
1978年 | 13篇 |
1976年 | 13篇 |
1975年 | 17篇 |
1974年 | 15篇 |
1973年 | 11篇 |
1972年 | 14篇 |
1970年 | 14篇 |
1969年 | 10篇 |
排序方式: 共有1553条查询结果,搜索用时 15 毫秒
101.
Preclinical testing of the nitroimidazopyran PA-824 for activity against Mycobacterium tuberculosis in a series of in vitro and in vivo models 总被引:6,自引:0,他引:6
下载免费PDF全文
![点击此处可从《Antimicrobial agents and chemotherapy》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Lenaerts AJ Gruppo V Marietta KS Johnson CM Driscoll DK Tompkins NM Rose JD Reynolds RC Orme IM 《Antimicrobial agents and chemotherapy》2005,49(6):2294-2301
This study extends earlier reports regarding the in vitro and in vivo efficacies of the nitroimidazopyran PA-824 against Mycobacterium tuberculosis. PA-824 was tested in vitro against a broad panel of multidrug-resistant clinical isolates and was found to be highly active against all isolates (MIC<1 microg/ml). The activity of PA-824 against M. tuberculosis was also assessed grown under conditions of oxygen depletion. PA-824 showed significant activity at 2, 10, and 50 microg/ml, similar to that of metronidazole, in a dose-dependent manner. In a short-course mouse infection model, the efficacy of PA-824 at 50, 100, and 300 mg/kg of body weight formulated in methylcellulose or cyclodextrin/lecithin after nine oral treatments was compared with those of isoniazid, rifampin, and moxifloxacin. PA-824 at 100 mg/kg in cyclodextrin/lecithin was as active as moxifloxacin at 100 mg/kg and isoniazid at 25 mg/kg and was slightly more active than rifampin at 20 mg/kg. Long-term treatment with PA-824 at 100 mg/kg in cyclodextrin/lecithin reduced the bacterial load below 500 CFU in the lungs and spleen. No significant differences in activity between PA-824 and the other single drug treatments tested (isoniazid at 25 mg/kg, rifampin at 10 mg/kg, gatifloxacin at 100 mg/kg, and moxifloxacin at 100 mg/kg) could be observed. In summary, its good activity in in vivo models, as well as its activity against multidrug-resistant M. tuberculosis and against M. tuberculosis isolates in a potentially latent state, makes PA-824 an attractive drug candidate for the therapy of tuberculosis. These data indicate that there is significant potential for effective oral delivery of PA-824 for the treatment of tuberculosis. 相似文献
102.
Tompkins JM 《Pediatric nursing》2005,31(5):426, 424-426, 425
A pediatric nurse reflects on her practice by recounting her experience while caring for a child with Guillian Barre 20 years ago. Principles and lessons relevant to guide pediatric nursing practice in today's health care environment are identified. 相似文献
103.
104.
105.
106.
107.
108.
We describe a middle-aged Chinese systemic lupus erythematosus (SLE) patient developing steroid refractory and transfusion dependent red cell aplasia. Oral danazol 200 mg twice per day was started together with low-dose prednisolone therapy. There was no further recurrence of anemia 1 month after this combined therapy. 相似文献
109.
Comparison of Campylobacter jejuni isolates implicated in Guillain-Barré syndrome and strains that cause enteritis by a DNA microarray
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)
We asked whether Campylobacter jejuni isolated from patients with Guillain-Barré syndrome (GBS) differ from isolates isolated from patients with uncomplicated gastrointestinal infection using DNA microarray analysis. We found that specific GBS genes or regions were not identified, and microarray analysis confirmed significant genomic heterogeneity among the isolates. 相似文献
110.
Meites E Jay MT Deresinski S Shieh WJ Zaki SR Tompkins L Smith DS 《Emerging infectious diseases》2004,10(3):406-412
Leptospirosis is a reemerging infectious disease in California. Leptospirosis is the most widespread zoonosis throughout the world, though it is infrequently diagnosed in the continental United States. From 1982 to 2001, most reported California cases occurred in previously healthy young adult white men after recreational exposures to contaminated freshwater. We report five recent cases of human leptospirosis acquired in California, including the first documented common-source outbreak of human leptospirosis acquired in this state, and describe the subsequent environmental investigation. Salient features in the California cases include high fever with uniform renal impairment and mild hepatitis. Because leptospirosis can progress rapidly if untreated, this reemerging infection deserves consideration in febrile patients with a history of recreational freshwater exposure, even in states with a low reported incidence of infection. 相似文献