荧光法测定羟基自由基及中草药抗氧化性

L-苯丙氨酸本身具有较弱的荧光,在羟基自由基的作用下能产生较强的荧光,其激发波长和发射波长分别是277 nm和306 nm.很多中草药提取物可以清除溶液中的羟基自由基,从而使溶液的荧光增强程度降低.据此,建立了一种测定中草药抗氧化性的方法.研究了L-苯丙氨酸-Fe2 -H2O2体系产生羟基自由基的最佳条件,并测试了赤芍、钩藤、姜黄、炒蒺藜四种中草药水提物的抗氧化活性.     

The impact of standards-based assessment on knowledge for history education in New Zealand

This paper examines how a standards-based form of assessment in operation in New Zealand has impacted upon the knowledge taught to secondary history students. The segmentation of history into assessable components along with assessment mechanisms which encourage the reduction in the number of standards being attempted has impacted upon both the breadth and range of historical content in history programmes. The reduction in knowledge is problematic as it diminishes learners’ opportunities to draw connections between inter-related historical concepts from a wider knowledge base. Social realists have raised concerns about the reduced focus on knowledge in education and its effects in restricting students’ development of conceptual knowledge which enables higher order, more abstract thinking. Experiences of standards-based assessment for history in New Zealand are indicative of this reductive phenomenon. In a culture of accountability, standards-based assessment, as enacted in New Zealand, may impede delivery of critical knowledge.     

Using a modified argument-driven inquiry to promote elementary school students’ engagement in learning science and argumentation

This study explored the effects of a modified argument-driven inquiry approach on Grade 4 students’ engagement in learning science and argumentation in Taiwan. The students were recruited as an experimental group (EG, n?=?36) to join a 12-week study, while another 36 Grade 4 students from the same schools were randomly selected to be the comparison group (CG). All participants completed a questionnaire at the beginning and end of this study. In addition, four target students with the highest and the other four students with the lowest pretest engagement in learning science or argumentation to be observed weekly and interviewed following the posttest. Initial results revealed that the EG students’ total engagement in learning science and argumentation and the claim and warrant components were significantly higher than the CG students. In addition, the EG students’ anxiety in learning science significantly decreased during the study; and their posttest total engagement in learning science scores were positively associated with their argumentation scores. Interview and observation results were consistent with the quantitative findings. Instructional implications and research recommendations are discussed.     

关于艺术院校学生普通话水平测试的几点思考

艺术院校的学生,特别是有专门台词课、表演课的影视表演、播音主持专业的艺术类学生,普通话水平测试的结果并不理想,达到一级水平的学生并不多。有的学生甚至怀疑普通话水平测试的信度和效度。文章针对这种情况,从口语的吐字归音入手,通过对台词教学与普通话水平测试的评价标准和要求的分析提出应试者(学生)要端正认识,掌握标准。参加普通话水平测试要按照普通话的标准说普通话,注意吐字归音从“神似”回归到“形似”。要经过严格的正音训练或参加普通话培训,在辅导老师的指导下,对自己准确定位,认真练习准备,建立起真实的自信,以顺利地通过普通话水平测试,进入“形”“神”兼备的语言艺术境界。     

山西省普通高中教师专业发展现状调查报告

通过对山西省普通高中教师的教育信念、专业知能、职业道德、专业态度和动机、专业自主和发展、职业自我意识等方面的调查研究,可以了解山西省普通高中教师的发展现状,从而为未来3-5年高中教育及教师队伍发展规划提供决策依据。     

中外学者与纳西族历史研究

20世纪以来，中外学对纳西族的社会历史进行了广泛的研究。学们通过史学、民族学、考古学等多学科相结合的方法，对纳西族的源流及历史发展作了深入细致的研究，并取得了丰硕的成果，特别是一批纳西族学如方国瑜、和志武、周汝诚及郭大烈等，都发表了各自的代表作。一些西方学如巴克、洛克及顾彼得等，也在长期贸居丽江的基础上出版了各自的专，他们不仅对纳西的社会历史研究作出了贡献，而且还促进了中外学在纳西化研究领域的合作与交流。     

高师《地球概论》课程教学改革的理论与实践

根据地球概论课程内容多、难度大和课时少等特点,对该课程如何适应时代要求,进一步深入改革的必要性和改革重点进行了分析和研究。通过调整教学内容、突出重点、精讲多练、单元测试、多媒体辅助教学、试题库建设、加强学生能力培养、重视教师素质提高等改革措施,使地球概论课程的教学质量和教学效率得到明显提高。     

论社会转型时期的大学教学:变革、挑战与趋势

目前，伴随着工业时代进入信息时代的社会转型期的来临，现代信息技术对大学教学产生着越来越深远的影响，使传统的大学教学遇到前所未有的冲击。本文从三个角度比较深入地论述了社会转型的大学教学：大学教学的变革现状如何；大学教学遇到的挑战是什么；大学教学的未来趋势怎样。     

将市场的观念引入高校办学机制

21世纪的高等教育面临着很多的机遇和挑战，新的人才市场形势给高校提出了更高的要求，要想使培养出来的毕业生真正满足社会的需要，必须首先了解社会，以市场为导向，树立新的办学理念，将“市场的观念”引入高校办学机制。     

高中学生升学就业倾向的实证研究

对高中学升学就业倾向的准确了解，能够为高中学生的升学就业指导提供依据。编制适合我国高中学生特点的升学就业倾向量表，对于每一个高中学生选择自己未来的学习方向和职业具有重要的实用价值。本研究将高中学生的升学就业倾向分为技术类、研究类、艺术类、社会类、经营类、事务类、自然类七种类型。问卷调查既验证了本分类方法的可行性，也揭示出了我省高中学生基本的升学就业倾向。