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   745篇
  免费   14篇
教育   593篇
科学研究   24篇
各国文化   8篇
体育   54篇
文化理论   5篇
信息传播   75篇
  2023年   5篇
  2022年   7篇
  2021年   5篇
  2020年   14篇
  2019年   36篇
  2018年   38篇
  2017年   30篇
  2016年   35篇
  2015年   15篇
  2014年   25篇
  2013年   214篇
  2012年   13篇
  2011年   20篇
  2010年   19篇
  2009年   15篇
  2008年   14篇
  2007年   25篇
  2006年   17篇
  2005年   13篇
  2004年   13篇
  2003年   12篇
  2002年   9篇
  2001年   18篇
  2000年   11篇
  1999年   9篇
  1998年   6篇
  1997年   8篇
  1996年   5篇
  1995年   7篇
  1994年   4篇
  1993年   3篇
  1992年   5篇
  1991年   11篇
  1990年   3篇
  1989年   8篇
  1987年   9篇
  1984年   7篇
  1982年   3篇
  1981年   4篇
  1980年   3篇
  1979年   2篇
  1978年   3篇
  1977年   2篇
  1976年   2篇
  1974年   3篇
  1971年   2篇
  1970年   3篇
  1969年   4篇
  1966年   2篇
  1927年   2篇
排序方式: 共有759条查询结果,搜索用时 15 毫秒
1.
Abstract

Carnosine was originally discovered in skeletal muscle, where it exists in larger amounts than in other tissues. The majority of research into the physiological roles of carnosine have been conducted on skeletal muscle. Given this and the potential for muscle carnosine content to be increased with supplementation, there is now a large body of research examining the ergogenic effects (or otherwise) of carnosine. More recent research, however, points towards a potential for carnosine to exert a wider range of physiological effects in other tissues, including the brain, heart, pancreas, kidney and cancer cells. Taken together, this is suggestive of a potential for carnosine to have therapeutic benefits in health and disease, although this is by no means without complication. Herein, we will provide a review of the current literature relating to the potential therapeutic effects of carnosine in health and disease.  相似文献   
2.
Book reviews     
Association of Research Libraries  相似文献   
3.
4.
5.
In order to assess the current status of MEDLINE training provided by schools of library science, a survey was conducted of those schools having an educational identification code issued by the National Library of Medicine. Information was gathered on such variables as the instructors' background and preparation, the course objectives and content, and the amount of on-line experience provided to students in each of eleven programs. An evaluation of these measures indicates that more opportunities to gain experience in using MEDLINE should be initiated by library schools and that current efforts should be continued and expanded. Specific recommendations for accomplishing these goals are outlined; they are addressed to health sciences librarians, library school educators, the Medical Library Association, and the National Library of Medicine.  相似文献   
6.
Field work and structured interviews with 139 foreign sojourners in India were analyzed to describe the socialization of aliens into their role. Attitude scales measuring favorability toward the host country and people were also examined in relation to the respondent's occupational status and elapsed time in India. The results from the field work and interviews suggest that the privileges and high status accorded many Western visitors may contribute to the visitors' derogation of their hosts, a process which is often subtle but unmistakable. The visitors appear to become socialized into the world of aliens rather than the world of their hosts. The higher the visitor's status and the longer the elapsed time in India, the more pronounced these patterns appear. While the correlational nature of the study makes it impossible to determine whether persons with initially unfavorable attitudes are selected into the high status positions or whether the positions themselves create such attitudes, it appears reasonable to conclude that there would be less derogation and alienation if the lures of status and money were removed; persons would be neither selected nor influenced by such factors.  相似文献   
7.
8.
9.
This study hypothesized that: (a) the MSSST would identify the same proportion (15%) of high-risk children in a group (N = 580) of first-grade urban black children as estimated for the general population; (b) the Myklebust would discriminate between high-risk (N = 22) and low-risk (N = 21) children within the minority group using the MSSST as the criterion variable; and (c) Myklebust ratings for the high-risk and low-risk young minority children would approximate ratings reported elsewhere for older white suburban samples of high-risk and low-risk children. All three hypotheses were confirmed. The MSSST may be appropriate for minority group children. The small number of teachers (N = 6) participating in the Myklebust ratings makes generalization about it hazardous without further replication.  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