全文获取类型
收费全文 | 141篇 |
免费 | 2篇 |
专业分类
教育 | 105篇 |
科学研究 | 5篇 |
体育 | 14篇 |
信息传播 | 19篇 |
出版年
2012年 | 14篇 |
2011年 | 17篇 |
2010年 | 2篇 |
2009年 | 1篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 6篇 |
2005年 | 11篇 |
2004年 | 4篇 |
2003年 | 9篇 |
2002年 | 11篇 |
2001年 | 8篇 |
2000年 | 12篇 |
1999年 | 9篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1984年 | 3篇 |
1980年 | 1篇 |
1958年 | 1篇 |
1956年 | 1篇 |
1946年 | 1篇 |
1945年 | 1篇 |
1943年 | 1篇 |
1940年 | 1篇 |
排序方式: 共有143条查询结果,搜索用时 500 毫秒
41.
Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men 总被引:2,自引:0,他引:2
In the present study, we assessed the effects of exercise intensity on salivary immunoglobulin A (s-IgA) and salivary lysozyme (s-Lys) and examined how these responses were associated with salivary markers of adrenal activation. Using a randomized design, 10 healthy active men participated in three experimental cycling trials: 50% maximal oxygen uptake (VO2max), 75%VO2max, and an incremental test to exhaustion. The durations of the trials were the same as for a preliminary incremental test to exhaustion (22.3 min, sx = 0.8). Timed, unstimulated saliva samples were collected before exercise, immediately after exercise, and 1 h after exercise. In the incremental exhaustion trial, the secretion rates of both s-IgA and s-Lys were increased. An increase in s-Lys secretion rate was also observed at 75%VO2max. No significant changes in saliva flow rate were observed in any trial. Cycling at 75%VOmax and to exhaustion increased the secretion of alpha-amylase and chromogranin A immediately after exercise; higher cortisol values at 75%VO2max and in the incremental exhaustion trial compared with 50%VO2max were observed 1 h immediately after exercise only. These findings suggest that short-duration, high-intensity exercise increases the secretion rate of s-IgA and s-Lys despite no change in the saliva flow rate. These effects appear to be associated with changes in sympathetic activity and not the hypothalamic - pituitary - adrenal axis. 相似文献
42.
43.
44.
45.
46.
47.
48.
The motivational styles of 25 children with attention-deficit/hyperactivity disorder, combined type (ADHD/C), 13 children with ADHD, inattentive type (ADHD/IA), and 25 nondiagnosed controls (NC) were compared using parent, teacher, and self-ratings. Both ADHD subtypes demonstrated motivational impairment characterized by a preference for easy work, less enjoyment of learning, less persistence, and a greater reliance on external than on internal standards to judge their performance relative to NC. Some motivational style differences between ADHD subtypes were also revealed, with the ADHD/C group more motivated by competitiveness and a desire to be perceived as superior to others and the ADHD/IA group less uncooperative and possibly more passive in their learning styles. When IQ was statistically controlled, these results were generally unchanged. The contributing role of motivational deficits to the generally poor academic functioning of children with ADHD is discussed, along with potential intervention implications of the divergent motivational styles of different ADHD subtypes. 相似文献
49.
OBJECTIVE: The heterogeneity within neglecting caregivers has not been explored in an empirical fashion. The current study sought to address this limitation by utilizing archival data in order to explore variability of maternal behavior among neglectful families. METHOD: The current study utilized archival data containing caseworker and self-report information on 100 mothers for whom neglect had been substantiated and was the primary referral concern. Cluster analysis was used to describe patterns of maternal behavior. Subsequent analysis was used to determine differences between the clusters on degree of neglect, maternal depression, perceived social support, and other demographic characteristics (income, education). RESULTS: Five distinct patterns of maternal behavior emerged, each with different ratings of maternal confidence, relatedness, impulse control, and willingness to engage in verbal interactions. The clusters differed on ratings of neglect, life stressors, resource problems and adult problems. The clusters were similar in terms of maternal education, number of children in the home, and monthly income. Additionally, women in all clusters reported similar levels of depression, similar number of children, and a comparable amount of social support. CONCLUSIONS: The five clusters are described and implications for intervention approaches are discussed. 相似文献
50.
OBJECTIVE: The purpose of this study, as part of a larger study on neighborhoods and child maltreatment, was to determine how parents residing in neighborhoods with differing profiles of risk for child maltreatment reports defined child abuse and neglect and viewed its etiology. METHOD: Parents (n = 400) were systematically selected from neighborhoods (n=20) with different profiles of risk for child maltreatment report rates. As part of a larger interview, parents were asked to generate lists of behaviors that they would define as child abuse and neglect and to rate 13 etiological factors on a 10 point scale as to their contribution to the occurrence of child maltreatment. RESULTS: While there were differences in definitional emphases, with African-American parents including behaviors of neglect and European-American parents including behaviors of physical abuse, there was marked congruence on the catalogue of behaviors that parents would define as child abuse and neglect. Four factors were identified that explained almost two-thirds of the variance in parents' etiological explanations: poverty and family disruption, substance abuse and stress; lack of moral and family values; and individual pathology. These factors were related to neighborhood conditions, individual perceptions of neighborhood and individual characteristics. CONCLUSIONS: Community-based programs aimed at preventing or ameliorating child maltreatment must have at their very core an understanding of how populations being served define child maltreatment and why they believe that it occurs. 相似文献