运动对GLUT4影响的研究进展

葡萄糖跨膜转运是机体利用葡萄糖的首要步骤。葡萄糖载体(GLUT)是细胞膜上介导葡萄糖跨膜转运的蛋白质,它们对机体的葡萄糖利用有重要意义。运动可有效增加外周组织(主要为骨骼肌和脂肪组织)细胞膜葡萄糖载体4(GLUT4)的数量,使细胞内GLUT4的囊泡数量增多,GLUT4mRNA的表达增强,有效地加快血糖的转移、吸收和利用,解除外周组织胰岛素抵抗,调节血糖平衡,对糖尿病人的治疗有积极的作用和意义。     

Pupil participation and the home–school relationship

Schools are required to develop policies and practices in line with the principles of both partnership with parents and pupil participation. However, there is increasing recognition of the potential tensions that may exist between these two principles. This paper reports on a study that aimed to explore the question of how schools might develop their home–school relationships in ways that enhance rather than constrain pupil participation. It focuses on the perspectives of children aged 6 to 16 years (with and without special educational needs), parents and teachers concerning children's involvement in decision-making at home and at school, and their participation within the home–school relationship. The findings highlight the need for schools to develop a coherent view of what active participation means for children and a vocabulary to communicate about this not only with pupils and staff across the whole school, but also with parents. They demonstrate that there is scope for two-way support between parents and teachers in relation to the promotion of children's involvement in decision-making both at home and at school. Further, they illustrate the complex and evolving three-way partnership between parent–child–teacher that is central to the home–school relationship. While it is acknowledged that children may rightly wish to keep a distance between aspects of home and school life, it is argued that there is a need for schools to give explicit consideration to the place of pupil participation within the home–school relationship.     

We make the road by walking together: New teachers and the collaborative and context-specific appropriation of shared social justice-oriented practices and concepts

This study examined the work of a collaborative group of six new United States-based social studies teachers from the same social justice-oriented teacher education program (SJOTEP). Shared practices and concepts introduced previously in the SJOTEP were developed and appropriated to their classrooms and schools in consideration of the local context, through the collaborative problem-solving process of the group. It is argued that SJOTEPs and TEPs committed to issues of diversity, democracy, inclusion, and/or equity should be collaboration-based, teach a coherent and consistent social justice-focused curriculum, and provide post-graduation collaborative support and research it.     

Universities and government‐sponsored contract research: an Australian case study

Based on interviews, this article provides a case study of the experiences of academic staff at one Australian regional university in undertaking contract research projects sponsored by government departments and agencies. Academics from a surprisingly diverse range of disciplines are attracted to government‐sponsored research for a variety of reasons but particularly important is the financial support provided for research projects and postgraduate research students. Projects vary in scale, amounts of funding involved and purposes, with research activities covering a wide range of different activities including collection and analysis of data, provision of documentation on good practice, design of implementation strategies, evaluations, organisational reviews and policy recommendations. Overall, respondents are highly positive about their experiences, despite problems such as delays in payment of funds, inappropriately restricted timelines, frequent changes in senior agency personnel, unrealistic expectations, and restrictions in the use of data and publication of results. While many academics from different disciplines provide policy recommendations and carry out evaluative studies, few are well informed about the extent to which their work is actually utilised.     

大学历史学科"四个一"方案的探索与实践

大学历史学科“四个一”方案指的是通过四个相互关联阶段的学习 ,使历史专业的学生从各个方面提高自身素质 ,从而更广泛地适应社会需要的方案。该方案可操作性强 ,实施效果比较明显     

健脾补糖对过度训练脾虚大鼠骨骼肌GLUT4和P38活性的影响

为了探讨健脾补糖对过度训练大鼠骨骼肌的糖转运和MAPK转导通路中P38活性的影响.通过6周递增大负荷游泳训练,观察过度训练和健脾补糖对胃肠的吸收功能,骨骼肌的糖转运、储备和P38活性的影响.研究表明:1)过度训练脾虚的大鼠的骨骼肌MAPK信号转导系统的P38途径虽然被激活.但骨骼肌的葡萄糖转运和糖储存被低血糖和胰岛素所抑制.因此没有明显改善骨骼肌的肌糖原储备.2)健脾补糖从改善胃肠功能、增加能源物质的摄入、提高抗氧化能力等多靶点激活了P38,使骨骼肌对葡萄糖的转运速度与合成速度均加快,在末次运动后24 h就使肌糖原达到了明显的超量恢复状态.     

硫酸法催化合成双酚芴的研究

以98%的浓硫酸作为催化剂合成双酚芴进行研究,分别对催化剂用量、助催化剂用量、反应时间、反应温度、酚酮摩尔比等主要因素对反应的影响,进行了试验,试验结果表明,使用浓硫酸催化合成双酚芴,最优条件下双酚芴的反应收率98.20%。制备双酚芴的最佳工艺条件为:酚酮摩尔比6:1,反应温度45℃,反应时间3h,催化剂浓硫酸用量为8.5mL/0.333mol芴酮,助催化剂β-巯基丙酸用量为0.25mL/0.333mol芴酮。     

第4届女子世界杯足球决赛运动员犯规特征分析

采用文献资料、观察统计法，对第4届女子世界杯足球决赛场上队员犯规特征进行分析。结果显示：全部比赛共犯规813次、越位161次、红牌1张、黄牌65张；平均3．54min有1次犯规、17．89min发生1次越位、44.33min出示1张黄牌；上半场的犯规数略高于下半场、越位数略少于下半场、黄牌数大大低于下半场；队员上肢犯规多于下肢；中场犯规最多。