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   324篇
  免费   9篇
教育   232篇
科学研究   34篇
各国文化   5篇
体育   40篇
文化理论   1篇
信息传播   21篇
  2023年   2篇
  2022年   7篇
  2021年   4篇
  2020年   10篇
  2019年   9篇
  2018年   13篇
  2017年   27篇
  2016年   21篇
  2015年   15篇
  2014年   16篇
  2013年   58篇
  2012年   19篇
  2011年   13篇
  2010年   13篇
  2009年   13篇
  2008年   7篇
  2007年   8篇
  2006年   5篇
  2005年   3篇
  2004年   3篇
  2003年   3篇
  2002年   1篇
  2001年   4篇
  2000年   2篇
  1999年   1篇
  1998年   3篇
  1997年   3篇
  1996年   1篇
  1995年   2篇
  1994年   2篇
  1992年   3篇
  1991年   5篇
  1990年   5篇
  1989年   3篇
  1988年   1篇
  1986年   1篇
  1984年   1篇
  1983年   2篇
  1981年   1篇
  1978年   1篇
  1977年   1篇
  1976年   3篇
  1975年   2篇
  1974年   2篇
  1973年   2篇
  1970年   1篇
  1969年   1篇
  1968年   3篇
  1967年   4篇
  1966年   3篇
排序方式: 共有333条查询结果,搜索用时 0 毫秒
91.
The present study aimed to determine the effects of physical training performed by parents on mice offspring adiposity. Male and female parents underwent an aerobic training protocol for 7 weeks. The trained and sedentary parents were allowed to mate and the resultant offspring divided in: S (Offspring from Sedentary Parents), T (Offspring from Trained Parents), ST (Offspring from Sedentary Father and Trained Mother) and TS (Offspring from Trained Father and Sedentary Mother). After weaning, offspring was euthanized, blood collected and samples of mesenteric and inguinal fat pads used to isolate adipocytes for morphologic and histological analyses. Lee index, mesenteric fat pad, sum of visceral fat and total fat weight of female T was reduced in comparison to the other groups (p < 0.05). Periepididymal and sum of visceral fat in male T group was also reduced when compared to the other groups (p < 0.05). The diameter of mesenteric and inguinal adipocytes of T group was smaller compared to all groups comparisons for both sexes (p < 0.05). In summary, exercise training performed by parents reduced visceral offspring adiposity, the diameter of subcutaneous adipocytes and improved metabolic parameters associated to metabolic syndrome.  相似文献   
92.
Methodologies for engineering learning and teaching (MELT) approach aims to enhance the attractiveness of education through science, technology, engineering and mathematics (STEM) among young people, while promoting awareness of future careers in these areas. To this end, students’ expectations are considered within university programmes, aiming to an increased engagement in STEM careers. To accomplish these goals, a new and integrated approach (MELT) is presented, involving the main stakeholders in both scientific education and society. An education framework is presented, providing guidelines for an improved collaborative approach to STEM education in the future. Results from the pilot implementation of MELT are presented, from a small-scale education parliament prototype. From these initial stage and results, it is seen that there is a need for a proper alignment of expectations from all involved stakeholders, concerning the engineering education towards society’s demands.  相似文献   
93.
In a recent article that appeared in this journal, Hofstein and Mandler (1985) reported a study which employed the Lawson's (1978) classroom test of formal reasoning to determine, among other things, the relationship between achievement in science and mathematics in a sample of Israeli students. Based on their findings, the authors raised objections to the classroom utility of the test for diagnosing students' developmental levels. The present author, however, argued that the case has not been properly established in view of one major methodological problem which seemed to characterize the study. Accordingly, the plea to abandon Lawson's test of formal reasoning was questioned.  相似文献   
94.
This study addresses replication in candidate gene × environment interaction (cG×E) research by investigating if the key findings from Brody, Beach, Philibert, Chen, and Murry (2009) can be detected using data (N = 1,809) from the PROSPER substance use preventive intervention delivery system. Parallel to Brody et al., this study tested the hypotheses that substance misuse initiation would increase faster from age 11 to age 14 and be higher at age 14 among: (a) 5‐HTTLPR short carrier adolescents versus long homozygotes, (b) control versus intervention adolescents, and (c) 5‐HTTLPR short carriers in the control condition versus all other participants. The hypotheses were generally supported and results were consistent with Brody et al.'s cG×I finding. Results are discussed in light of replication issues in cG×E research and implications for intervention.  相似文献   
95.
This study is focused on the relationship between the development of segmental awareness and dyslexia. More specifically we have tried to address the question, is it possible to learn to segment well and yet continue to read and write poorly? For this purpose, 14 second and third grade dyslexic children were assigned to three different training programs. Those who participated in the first two programs were taught the skills required to use the phonemes, while those in the third program, who served as a pseudo-control group, were given the exercises in perceptual and psychomotor activities. After the training program, children who had received the first two training programs reached a level of performance similar to that of normal readers in different tasks of segmentation of phonemes. The improvements observed in these tasks were correlated in dictation but not in reading, where there was no difference after training.  相似文献   
96.
The use of human material in anatomy education depends upon the generosity of body donors. However, little is known regarding the demographics of body donors in Brazil, where voluntary body donation is a relatively rare phenomenon. Hence, the aim of the present study was to elucidate the demographic profile of applicants to the Body Donation Program (BDP) at the Federal University of Health Sciences of Porto Alegre in Brazil, as well as to assess whether the observed characteristics of body donors are unique to that sample, or if they merely reflect the characteristics of the regional population. Information derived from the specific forms filled out by donors between January 2008 and June 2016 at the time of registration were collected. Data from 416 forms were analyzed. Based on this study, the typical applicant in Brazil is typically a white female (67.4%), over 60 years of age (60.3%), unmarried or single (70.6%), affiliated with a religious group (89.1%), of middle class background (40.4%), who has completed high school and/or holds a university degree (93.8%). The motivation of donors was, in most cases, an altruistic gesture, represented by the desire to help society and science. Elucidating these demographic characteristics of potential donors may help identify the target public to which information regarding body donation campaigns could be directed. Anat Sci Educ 10: 475–486. © 2017 American Association of Anatomists.  相似文献   
97.
The Spanish health care system has undergone important changes with regard to the development of new homecare services known as “Hospital in the Home”. This paper investigates the approaches that hospital in the home units (HHUs) have used to update physician/patient knowledge and the technology knowledge of their members and relates them to an unlearning context and improvement in the quality of health services. These relationships are examined through an empirical investigation of 55 doctors and 62 nurses belonging to 44 HHUs. The research findings suggest that the key benefits of an unlearning context in HHUs are clear: it enables them to identify and replace poor practices and also avoids the reinvention of the wheel; it enables cost reduction by minimizing unnecessary work caused by the use of poor methods; and it enables improvements in services to patients.  相似文献   
98.

Identification of the factors that contribute to the fear of success in women's career development is important for community college educators and counselors wanting to assist women in their professional goals. In this article the factors associated with fear of success in women are categorized as follows: familial socialization, psychological influences, and cultural norms. It is generally conceded that any one or combination of these factors can precipitate a fear of success which becomes manifest in the woman's defeatist behaviors, and in turn, undermines her career development. It is imperative that professionals recognize the factors causing the fear of success orientation in women so that they may develop coping strategies with the client.  相似文献   
99.

Introduction:

The contamination of serum or lithium heparin blood with ethylenediaminetetraacetic acid (EDTA) salts may affect accuracy of some critical analytes and jeopardize patient safety. The aim of this study was to evaluate the effect of lithium heparin sample contamination with different amounts of K2EDTA.

Materials and methods:

Fifteen volunteers were enrolled among the laboratory staff. Two lithium heparin tubes and one K2EDTA tube were collected from each subject. The lithium-heparin tubes of each subject were pooled and divided in 5 aliquots. The whole blood of K2EDTA tube was then added in scalar amount to autologous heparinised aliquots, to obtained different degrees of K2EDTA blood volume contamination (0%; 5%; 13%; 29%; 43%). The following clinical chemistry parameters were then measured in centrifuged aliquots: alanine aminotranspherase (ALT), bilirubin (total), calcium, chloride, creatinine, iron, lactate dehydrogenase (LD), lipase, magnesium, phosphate, potassium, sodium.

Results:

A significant variation starting from 5% K2EDTA contamination was observed for calcium, chloride, iron, LD, magnesium (all decreased) and potassium (increased). The variation of phosphate and sodium (both increased) was significant after 13% and 29% K2EDTA contamination, respectively. The values of ALT, bilirubin, creatinine and lipase remained unchanged up to 43% K2EDTA contamination. When variations were compared with desirable quality specifications, the bias was significant for calcium, chloride, LD, magnesium and potassium (from 5% K2EDTA contamination), sodium, phosphate and iron (from 29% K2EDTA contamination).

Conclusions:

The concentration of calcium, magnesium, potassium, chloride and LD appears to be dramatically biased by even modest K2EDTA contamination (i.e., 5%). The values of iron, phosphate, and sodium are still reliable up to 29% K2EDTA contamination, whereas ALT, bilirubin, creatinine and lipase appear overall less vulnerable towards K2EDTA contamination.  相似文献   
100.
Political rhetoric in a democracy is, in at least some sense, educative and constitutive even as it is instrumentally persuasive. For members of ethnic, racial, or cultural groups that lie outside of the dominant culture, the educative processes that underlie policy advocacy require attention to specific cultures, traditions, historical experiences, and group interests. Thus, even though all out‐groups share many common challenges, they all face unique situations as well. This essay explores these rhetorical challenges and some of the strategies designed to meet them through an examination of the political rhetoric of American Indian activists from the 1972 Trail of Broken Treaties through the 1973 siege at Wounded Knee, South Dakota. Particular attention is paid to the question of audience.  相似文献   
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