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891.
892.
Jude Collins Elise Seip T⊘nnessen Ann Marie Barry Helen Yeates 《Educational Media International》2013,50(4):254-260
Abstract To what extent are children influenced by television and, in particular, by advertising? The study discussed in this article was conducted in four countries with, in some cases, surprising results. Parents think that television influences their children, but children too have views on how adults are affected. 相似文献
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894.
Although the structural and functional effects of exercise on the heart are well established, the metabolic changes that occur in the heart during and after exercise remain unclear. In this study, we used metabolomics to assess time-dependent changes in the murine cardiac metabolome following 1 session of treadmill exercise. After the exercise bout, we also recorded blood lactate, glucose, and ketone body levels and measured cardiac mitochondrial respiration. In both male and female mice, moderate- and high-intensity exercise acutely increased blood lactate levels. In both sexes, low- and moderate-intensity exercise augmented circulating 3-hydroxybutryrate levels immediately after the exercise bout; however, only in female mice did high-intensity exercise increase 3-hydroxybutyrate levels, with significant increases occurring 1 h after the exercise session. Untargeted metabolomics analyses of sedentary female and male hearts suggest considerable sex-dependent differences in basal cardiac metabolite levels, with female hearts characterized by higher levels of pantothenate, pyridoxamine, homoarginine, tryptophan, and several glycerophospholipid and sphingomyelin species and lower levels of numerous metabolites, including acetyl coenzyme A, glucuronate, gulonate, hydroxyproline, prolyl-hydroxyproline, carnosine, anserine, and carnitinylated and glycinated species, as compared with male hearts. Immediately after a bout of treadmill exercise, both male and female hearts had higher levels of corticosterone; however, female mice showed more extensive exercise-induced changes in the cardiac metabolome, characterized by significant, time-dependent changes in amino acids (e.g., serine, alanine, tyrosine, tryptophan, branched-chain amino acids) and the ketone body 3-hydroxybutyrate. Results from experiments using isolated cardiac mitochondria suggest that high-intensity treadmill exercise does not acutely affect respiration or mitochondrial coupling; however, female cardiac mitochondria demonstrate generally higher adenosine diphosphate sensitivity compared with male cardiac mitochondria. Collectively, these findings in mice reveal key sex-dependent differences in cardiac metabolism and suggest that the metabolic network in the female heart is more responsive to physiological stress caused by exercise. 相似文献
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AbstractThis paper explores some important aspects of the generation of practical knowledge through later life. It is about the relationship between knowledge generation, agency and capability, developed informally through the life experiences in and through the Company of Others. It emphasises how the everyday processes of socialisation create invaluable opportunities to know how to navigate the diverse and complex changes thrown up in the journey through later life. It asks where and how knowhow is generated after workforce participation ceases and pays particular attention to ‘third places’, opportunities in the community that enable social connections beyond the first and second places, home and work, respectively. The empirical and theoretical data come from two main Australian sources amplified by new international research in cognate fields. The first is a study about Generating knowhow in later life. The second derives from insights from research for a book into the origins and nature of the now international Men’s Shed Movement. 相似文献
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Helen Trevethan 《师资教育杂志》2017,43(2):219-231
Classroom experience is an important part of initial teacher education (ITE) and the teachers who work with student teachers in schools have a significant impact on learning in this context. While many studies have documented what the role of these teachers should be, it is also important to consider how the role is conceptualised by the teachers themselves. This qualitative study compares the views of New Zealand primary school teachers with that of an ITE provider. The findings show some differences among the teachers and significant differences between classroom teachers’ interpretations of their role and the expectations of the ITE provider. Teacher interpretations are firmly held and there is more work to be done to explore understandings of educative mentoring and so develop a coherent shared vision of roles in the practicum community. 相似文献
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900.
Helen Hok-Sze Leung 《Inter-Asia Cultural Studies》2017,18(4):482-497
This article examines the contested relation between discourses of ethnic subjectivity and queer critique of homophobia and transphobia in Vancouver, a transpacific city in Canada that is being touted as “the most Asian city outside of Asia.” I analyse the perceived association of Chinese communities with moral conservatism and the concomitant existence of a vibrant queer Asian cultural scene in the city as a discursive clash between two cultural publics. I examine the underlying dynamics of their antagonism as well as their potential for mutual engagement. 相似文献