高中化学课余自主学习的设计策略

将化学教学与学生生活相融合,通过设计生活中的探究学习任务,使用贴吧作为学生自主学习的交流平台,促进学生对生活和化学的了解,促进学生课余的自主学习。并通过实例具体叙述了生活中的探究学习任务的设计策略和网络交流平台的使用策略。     

基于"三维一体"线上线下混合式教学创新的探索与实践——以无机及分析化学课程为例

通过教材与自建慕课平台互补的立体课程体系,提供拓展式学习渠道;通过内容导学和任务驱动,"三维一体"线上线下混合式教学有效促进了学生自主学习,根据学生学习成效反馈实时调整教学内容和教学进度设计;通过教学目标与学习活动关联,强化学生在教学过程中的自主度和参与度,利用过程评价激发学生学习的内驱力,帮助学生通过调控学习过程促进深度学习.     

促进学生创新学习的教学方法探索和实践

针对化工原理课程的特点,通过建立促进学生创新学习的教学理念,采用促进创新学习的教学方法,对共性和特例进行比较研究,针对实际问题开展课堂讨论以及开设化工原理开放实验和设计实验等引导学生进行创新学习,以促进学生对传递过程原理的理解、掌握和应用。     

转变初中生化学前概念中相异构想的教学策略

笔者在初中生化学前概念中相异构想成因的前期研究基础上,分析了影响学生相异构想转变的因素,并结合前人研究成果,从引发学生认知冲突、促进学生认知顺应、激发学习兴趣、促进学习主动调控等角度,初步提出了促进学生相异构想转变的教学策略.     

运用建构主义理论进行化学教学的尝试

践行建构主义的理念,通过协作学习和自主学习,激发学生学习的内在动力,充分调动了学生的探究积极性,培养学生的创新精神和实践能力,并促进了合作学习以及学生的自我评价。     

重视探究学习活动 发展学生科学探究能力

探究学习是提高学生科学探究能力的重要途径。探究学习活动中要突出学生自主活动,落实学生的主体性;通过合作学习,培育学生的合作精神;重视教师指导作用,发展学生探究能力;坚持科学评价,促进学生全面发展。     

基于课堂无线应答系统的有机化学互动教学模式探索

探索无线应答系统在有机化学课堂教学中的应用。这种课堂教学模式能提高学生对有机化学课堂教学的兴趣,促进学生主动学习,提高教师的工作效率;还可以用于了解学生的学习状况,跟踪学习进程,提高有机化学课堂教学质量。     

研究性学习中学生的学习行为分析

教学活动设计的核心问题是引导学生的学习行为,从而促进学生心理的发展。对学生的学习行为的分析可以了解学生在研究过程中对自己知识框架的构建和整合过程,以及对研究性学习目的所达到的程度。本文从学生的特征、学习风格、研究小组的分工合作、学生信息来源等方面对研究性学习中学生学习行为进行了粗略的分析。     

基于学生自主选题形式的教学实践与思考

在实践的过程中逐步积累并形成的学生与学生之间的互问、互查和互测的教学方法,使学生在自主选题、小组合作和参与评价的过程中,以多种形式优化学生学习过程中知识结构的形成,引导学生主动反思,改变以往被动接受、被动练习的学习状态,提高学习的主动性,促进教学方法和学习方式的改变。     

学生档案袋在"化学教学论"课程学习与评价中的应用

学生档案袋评价作为一种新型的质性评价模式,将之应用于“化学教学论”课程的学习与评价中具有独特的功能与效果.它不仅能真实地反映学生的个体差异,连续地综合地较为准确地对学生在各个学习阶段中做出适当的评价,而且能促进学生有效地学,促进教师有效地教.     

国内光催化研究进展简述

分1975~1985, 1985~1995和1995~2012三个时期简要介绍了国内光催化研究进展, 主要侧重于光催化材料及其改性、应用和反应机理方面的研究进展, 并指出了当前光催化领域存在的一些重要问题和未来的发展趋势, 涉及到光解水、CO₂还原、环境净化和选择性有机合成等方面.     

青蒿素研究进展

青蒿素是目前治疗疟疾的特效药。本文对自青蒿素发现以来的最新研究进展进行了比较详尽的综述。内容包括: 青蒿素的发现及历史, 青蒿素的来源, 青蒿素的全合成,青蒿素的生物合成, 青蒿素衍生物以及植物组织培养生产青蒿素。     

Recent Advances in Analytical Methodology for in vivo Electrochemistry in Mammals

Electrochemistry is one of the most advanced techniques for monitoring neurochemical activities in the living brain because electrochemical approaches bear the advantageous features of high spatial and temporal resolutions, which facilitate its tremendous potential in investigating the highly spatially heterogeneous brain system and the fast dynamics of neurochemical activities. On the other hand, since brain is the most complicated organ in the sense of its numerous kinds of neurochemical species, high selectivity is always required for any analytical methods that approach the brain. In this review, we will discuss various electrochemical methodologies to achieve selective detection of neurochemicals in mammalian brain and the strategies developed mainly by our group towards selective monitoring of both electrochemically active and inactive neurochemicals. At the end, we will discuss possible solutions towards brain mapping of neurochemical species and combination of neurochemical detection strategy with electrophysiology as the direction of future development of electroanalysis in living brain.     

乙基香兰素研究前景

报导了近几十年来国内外关于乙基香兰素的研究进展与动态,并简单介绍了本文作者在该方面所取得的研究成果,参考文献33篇。     

Reactions in droplets in microfluidic channels

Fundamental and applied research in chemistry and biology benefits from opportunities provided by droplet-based microfluidic systems. These systems enable the miniaturization of reactions by compartmentalizing reactions in droplets of femoliter to microliter volumes. Compartmentalization in droplets provides rapid mixing of reagents, control of the timing of reactions on timescales from milliseconds to months, control of interfacial properties, and the ability to synthesize and transport solid reagents and products. Droplet-based microfluidics can help to enhance and accelerate chemical and biochemical screening, protein crystallization, enzymatic kinetics, and assays. Moreover, the control provided by droplets in microfluidic devices can lead to new scientific methods and insights.     

Conferences in Chemistry Held in 2022

Russian Chemical Bulletin -     

Interpretation of inorganic arsenic metabolism in humans in the light of observations made in vitro and in vivo in the rat

The toxicity of inorganic trivalent arsenic for living organisms is reduced by in vivo methylation of the element. In man, this biotransformation leads to the synthesis of monomethylarsonic (MMA) and dimethylarsinic (DMA) acids, which are efficiently eliminated in urine along with the unchanged form (As_i). In order to document the methylation process in humans, the kinetics of As_i, MMA and DMA elimination were studied in volunteers given a single dose of one of these three arsenicals or repeated doses of As_i. The arsenic methylation efficiency was also assessed in subjects acutely intoxicated with arsenic trioxide (As₂O₃) and in patients with liver diseases. Several observations in humans can be explained by the properties of the enzymic systems involved in the methylation process which we have characterized in vitro and in vivo in rats as follows: (1) production of As_i metabolites is catalyzed by an enzymic system whose activity is highest in liver cytosol; (2) different enzymic activities, using the same methyl group donor (S-adenosylmethionine), lead to the production of mono- and di-methylated derivatives which are excreted in urine as MMA and DMA; (3) dimethylating activity is highly sensitive to inhibition by excess of inorganic arsenic; (4) reduced glutathione concentration in liver moderates the arsenic methylation process through several mechanisms, e.g. stimulation of the first methylation reaction leading to MMA, facilitation of As_i uptake by hepatocytes, stimulation of the biliary excretion of the element, reduction of pentavalent forms before methylation, and protection of a reducing environment in the cells necessary to maintain the activity of the enzymic systems.     

美国化学教育中的科学道德教育

介绍了近年来美国科学界维护科学道德的行动及美国某些大学化学系开设科学道德教育课程的情况     

Styrol in Polystyrol und in Styrol-Methylmethacrylat-Copolymeren

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