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   20333篇
  免费   1860篇
  国内免费   43篇
耳鼻咽喉   249篇
儿科学   711篇
妇产科学   711篇
基础医学   2643篇
口腔科学   251篇
临床医学   2462篇
内科学   3644篇
皮肤病学   260篇
神经病学   2422篇
特种医学   466篇
外科学   2106篇
综合类   419篇
一般理论   21篇
预防医学   2775篇
眼科学   227篇
药学   1683篇
中国医学   16篇
肿瘤学   1170篇
  2023年   176篇
  2022年   212篇
  2021年   503篇
  2020年   373篇
  2019年   542篇
  2018年   566篇
  2017年   501篇
  2016年   549篇
  2015年   503篇
  2014年   725篇
  2013年   976篇
  2012年   1377篇
  2011年   1426篇
  2010年   729篇
  2009年   572篇
  2008年   1097篇
  2007年   1105篇
  2006年   995篇
  2005年   925篇
  2004年   877篇
  2003年   802篇
  2002年   780篇
  2001年   442篇
  2000年   437篇
  1999年   389篇
  1998年   184篇
  1997年   168篇
  1996年   164篇
  1995年   136篇
  1994年   124篇
  1993年   123篇
  1992年   251篇
  1991年   262篇
  1990年   299篇
  1989年   236篇
  1988年   213篇
  1987年   219篇
  1986年   200篇
  1985年   229篇
  1984年   174篇
  1983年   118篇
  1982年   82篇
  1981年   75篇
  1979年   115篇
  1978年   105篇
  1977年   73篇
  1975年   80篇
  1974年   108篇
  1973年   90篇
  1972年   90篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.

Objectives

The current study investigated the effects of two exercise interventions on cognitive function amongst breast cancer survivors.

Design

Pilot randomised-controlled trial.

Methods

Seventeen female cancer survivors (mean: 62.9 ± 7.8 years) were randomised into three groups: high-intensity interval training (HIIT, n = 6); moderate-intensity continuous training (MOD, n = 5); or wait-list control (CON, n = 6). The HIIT and MOD groups exercised on a cycle ergometer 3 days/week for 12-weeks. Primary outcomes were cognitive function assessments utilising CogState. Secondary outcomes were resting middle cerebral artery blood flow velocity, cerebrovascular reactivity and aerobic fitness (VO2peak). Data were analysed with General Linear Mixed Models and Cohen’s d effect sizes were calculated.

Results

All 17 participants who were randomised were available for follow-up analysis and adherence was similar for HIIT and MOD (78.7 ± 13.2% vs 79.4 ± 12.0%; p = 0.93). Although there were no significant differences in the cognitive and cerebrovascular outcomes, HIIT produced moderate to large positive effects in comparison to MOD and CON for outcomes including episodic memory, working memory, executive function, cerebral blood flow and cerebrovascular reactivity. HIIT significantly increased VO2peak by 19.3% (d = 1.28) and MOD had a non-significant 5.6% (d = 0.72) increase, compared to CON which had a 2.6% decrease.

Conclusions

This study provides preliminary evidence that HIIT may be an effective exercise intervention to improve cognitive performance, cerebrovascular function and aerobic fitness in breast cancer survivors. Considering the sample size is small, these results should be confirmed through larger clinical trials.  相似文献   
6.
7.
8.
2‐deoxy D‐glucose (2DG) was tested for efficacy in treating alopecia areata using the C3H/HeJ skin graft model. 2DG has proven to be efficacious in treatment of various mouse models of autoimmunity with minimal serious side effects noted. This agent has been shown to normalize abnormally activated T‐cell populations while also preventing cell surface expression of NKG2D; key factors defining alopecia areata disease progression. Daily oral ingestion of 2DG via drinking water to mice with patchy or diffuse alopecia areata for 16 weeks failed to prevent expansion of alopecia or cause regrowth of hair in treated mice. Histologically, there were no differences between treated and control groups. These results indicate that, while 2DG is effective for some autoimmune diseases, it was not efficacious for the cell‐mediated autoimmune mouse disease, alopecia areata.  相似文献   
9.
We present the case of a 54‐year‐old patient with renal transplant who developed unusual vascular changes on the forearm distal to a functioning arteriovenous fistula, as well as a painful ulcerated lesion on her anterior abdominal wall. We believe that the diffuse dermal angioendotheliomatosis variant of reactive angioendotheliomatosis had a role in the pathogenesis of this patient's lesions.  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