首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1183篇
  免费   29篇
  国内免费   2篇
耳鼻咽喉   23篇
儿科学   32篇
妇产科学   12篇
基础医学   244篇
口腔科学   14篇
临床医学   136篇
内科学   156篇
皮肤病学   10篇
神经病学   37篇
特种医学   53篇
外科学   252篇
综合类   8篇
预防医学   59篇
眼科学   73篇
药学   45篇
中国医学   1篇
肿瘤学   59篇
  2022年   18篇
  2021年   13篇
  2018年   10篇
  2016年   11篇
  2015年   9篇
  2014年   9篇
  2013年   22篇
  2012年   18篇
  2011年   21篇
  2010年   32篇
  2009年   18篇
  2008年   34篇
  2007年   38篇
  2006年   28篇
  2005年   24篇
  2004年   17篇
  2003年   23篇
  2002年   26篇
  2001年   25篇
  2000年   19篇
  1999年   23篇
  1998年   11篇
  1997年   13篇
  1996年   11篇
  1993年   9篇
  1992年   30篇
  1991年   29篇
  1990年   42篇
  1989年   46篇
  1988年   44篇
  1987年   52篇
  1986年   34篇
  1985年   54篇
  1984年   25篇
  1983年   19篇
  1982年   9篇
  1979年   23篇
  1978年   21篇
  1977年   17篇
  1976年   22篇
  1975年   26篇
  1974年   15篇
  1973年   32篇
  1972年   18篇
  1971年   25篇
  1970年   19篇
  1969年   21篇
  1968年   15篇
  1967年   21篇
  1966年   20篇
排序方式: 共有1214条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
As many as 60 patients with combined pathologies (chronic hepatitis (CH) and chronic non-calculous cholecystitis (CNCC)) were examined, and 20 healthy subjects were included in the control group. The efficacy of Essliver Forte for patients with chronic non-calculous cholecystitis combined with chronic hepatitises (both viral hepatitis and steatohepatitis) was assessed on the basis of clinical, biochemical and bacteriological criteria. Essliver Forte was found to improve the clinical and biochemical parameters of the functional liver condition, bile biochemical characteristics and intestinal microbiocenosis in patients with combined pathologies. The positive clinical effect is most evident for patients with chronic non-calculous cholecystitis and chronic steatohepatitis (both alcohol and non-alcohol). Essliver Forte can be recommended for treatment of patients with combined pathologies.  相似文献   
5.
6.
The modulation of drug metabolising enzymes by Masheri extract (ME) and Benzo(a)Pyrene [B(a)P] was studied in male Sprague Dawley rats fed different dietary protein levels. Two groups of 21 days old male Sprague Dawley rats were put on a high protein diet (SHP) with 20% Casein, and a low protein diet (SLP) with 3% Casein semisynthetic based diets for 12 weeks. The SLP fed animals showed lower basal levels of the Phase I activating enzymes viz. Cytochrome P450, Benzo(a)Pyrene hydroxylase, Benzphetamine demethylase and Phase II glutathione detoxification system viz. Glutathione (GSH) and Glutathione-S-transferase. ME and B(a)P treatment significantly depleted the glutathione detoxification system in the SLP group whereas an opposite effect was observed in the SHP group. Interstingly, ME and B(a)P treated rats in the SLP group showed a higher percent increase in the hepatic and pulmonary Phase I enzyme activities than those observed in the treated ME/B(a)P treated SHP rats. Furthermore, both ME and B(a)P significantly decreased the hepatic pool of vitamin A while a concomittant increase in that of vitamin C was observed.  相似文献   
7.
8.
Classical and anaplastic seminoma: difference in survival   总被引:1,自引:0,他引:1  
Bobba  VS; Mittal  BB; Hoover  SV; Kepka  A 《Radiology》1988,167(3):849-852
Classical and anaplastic seminoma are traditionally treated with radiation therapy and are said to have the same prognosis. A retrospective study was undertaken of 90 seminoma patients treated with radiation therapy between 1961 and 1985. The classical group consisted of 71 patients of whom 50 had stage I and 21 had stage II disease. The anaplastic group consisted of 19 patients of whom ten had stage I and nine had stage II disease. The median follow-up time was 64 months for the entire group. The 10-year relapse-free survival rate for the classical group was 94% and for the anaplastic group was 70% (P less than .05). For patients with classical stage I disease, the relapse-free actuarial survival rate was 98%; for patients with anaplastic stage I disease, it was 64% (P less than .02). For the classical stage II disease group, the relapse-free actuarial survival rate was 84% and for the anaplastic stage II disease group, 75% (P less than .70). Four patients in the classical group (6%) had relapses; of these, one patient had local recurrence of tumor, and three had distant metastases. In the anaplastic group, four patients (21%) had relapses; two patients had local recurrence of tumor, and two had distant metastases. Therefore the data suggest a difference in survival and relapse rates between classical and anaplastic seminoma.  相似文献   
9.
白玉杰  Seetha SV  Vamla B  高庆生 《医学争鸣》2003,24(20):1845-1848
目的:应用酵母双杂交方法筛选BRCA2相互作用蛋白编码基因,验证其相互作用并研究其功能联系。方法:以BRCA2基因3′端片段构建酵母双杂交质粒,筛选正常人乳腺上皮细胞cDNA库,获得编码相互作用蛋白的基因,采用免疫共沉淀、哺乳细胞双杂交和荧光酶测定等方法进一步验证蛋白间相互作用和功能联系.结果:采用酵母双杂交系统筛选,获得了多个编码BRCA2相互作用蛋白的基因,其中包括已知的FHL2蛋白;免疫共沉淀和哺乳动物细胞双杂交试验显示BRCA2和FHL2在体内特异性结合,并证实FHL2在体内形成同源二聚体;转录活性分析发现BRCA2与FHL2有协同转录激活作用。结论:发现BRCA2与FHL2蛋白间相互作用和功能联系,为BRCA2功能研究提供了新的方向。  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号