稀土联吡啶配合物对黑曲霉活性的影响

实验采用平皿培养法和抑菌圈法测定了稀土三元配合物RE(2-Cl-4-FBA)3bipy(RE=Nd、Sm、Ho、Eu)以及配体2-氯-4-氟苯甲酸(2-Cl-4-FHBA)、2,2‘-联吡啶(bipy)对黑曲霉生物活性的影响.通过比较抑菌圈直径的大小,发现合成的四种配合物对黑曲霉生长都存在选择性抑制,其中Sm的三元配合物抑制作用最明显;在相同条件下继续培养,每两周测量抑菌圈直径,其结果表明配合物的抑菌效果稳定持久.初步推测可将这种稀土配合物应用于那些具备适宜黑曲霉生长和繁殖条件的工业器械的灭菌.     

吸附烟草特有亚硝胺的分子筛新材料

烟草特有亚硝胺（TSNA）属于强致癌物,是吸烟导致癌症的重要因素．如何在成分复杂的环境烟气里吸附亚硝胺成为环境保护的难题．文章综述了近年来的研究进展,剖析了分子筛形貌对TSNA吸附的影响,讨论了液相吸附TSNA的新材料,并展望特定分子筛新材料的发展方向．     

Counseling Center Intake Checklists at Academically Selective Institutions: Practice and Measurement Implications

Psychometric evaluation of presenting problem checklists is vital, given increasing clinical severity among college students. However, checklist research has focused on students at public universities and utilized inappropriate methodologies when doing so. It is unclear whether checklists used at academically selective universities reliably and comprehensively assess the potentially unique presenting problems of their students. Exploratory and confirmatory factor analyses with independent samples examined the checklist used at an academically selective university's counseling center. A six-factor model best fit the data, suggesting that this checklist reliably and comprehensively assesses presenting problems at this university. This model holds detailed assessment, outreach, and policy implications for counseling centers.     

Effects of a classroom management intervention on student selective attention: results from a randomized controlled trial

ABSTRACT

A main objective of classroom management (CM) is to raise students’ attention to their daily academic work by creating a classroom environment that supports academic and socioemotional learning. While studies have addressed CM effects on classroom-level behaviour or students’ academic outcomes, students’ attention skills been largely overlooked. This randomized controlled trial evaluates the effectiveness of a teacher-targeted CM intervention on students’ selective attention. Twenty-four primary schools were randomized into receiving the Inclusive And Appreciative Classroom Management (IACM) intervention (treatment) or a general information technology (IT) didactics course (control condition). All participating 1st-grade teachers and their students (N = 1,160) were followed for 1 year. Using repeated measurements of the d2 Test of Attention, we find that the IACM intervention improves students’ selective attention with .26 standard deviations. The effect is robust to the inclusion of student- and classroom-level characteristics. All analyses account for the variation across students, classrooms, and schools.     

学生需求视角下对大学英语选修课课程设置的思考

通过对学生在选课动机、课程目标需求、课程学习需求、学习收获、存在的问题几方面对选修课课程设置的反馈,基于需求分析理论和问卷结果,对大学英语选修课程的开设情况进行分析讨论,并就如何从学生需求视角完善大学英语选修课程设置体系提出建议。     

Educational attainment in the short and long term: was there an advantage to attending faith,private, and selective schools for pupils in the 1980s?

ABSTRACT

This paper asks whether private, selective, and faith schools in England and Wales in the 1980s provided an academic advantage to their pupils, both in the short and longer term. Using longitudinal data from the 1970 British Cohort Study, we examine academic outcomes in compulsory schooling and further education, and the highest qualification gained by age 42. School sector differences are substantially attenuated by controlling for prior pupil characteristics. Nevertheless, a residual effect of private, grammar, and secondary modern schooling remains, both in the short and long term, controlling for both pupil and school characteristics. In the case of faith schools, however, the apparent advantage is restricted to the short term once pupil characteristics are controlled. A unique feature of our analysis is that we control for the individual’s faith of upbringing, which is important in reducing what could otherwise be seen as a distinctive Catholic school advantage.     

试析大学男生耐力素质发展与体育选项课的关系

采用文献法、实验法以及数理统计法,对大学男生的耐力素质发展与体育选项课的关系进行分析。结果表明：足球班、篮球班学生的耐力素质发展较好,体育选项课专项练习特点、学生运动技能基础和课内外实际运动负荷与其耐力素质的发展均存在一定的关系。在武术、网球、乒乓球和排球等课程中应适当安排一些足、篮球活动或中长跑练习,以引导和促使学生更有效地发展耐力和增进体质健康。     

体育运动中选择性注意的研究方法

通过查阅国内外文献,归纳了体育运动领域选择性注意的研究方法和技术,随着认知心理学的不断发展以及录像和计算机技术的兴起,经由早期主观、经验向客观、实证过渡,越来越多地呈现出科学性、准确性和先进性.在分析这些方法和技术的优、劣势的基础上,建议单一化向多元化进展.     

基于WWW体育选修课管理系统的设计与实现

本文是基于 www技术 ,设计和实现的体育选课管理信息系统。该系统以浏览器 /服务器 (B/ S)模式实现选修课信息的管理 ,实现了网页访问、系统查询、学生和教师信息的管理、课程管理、选课管理、成绩管理、系统管理、电子公告等功能。