化学课堂结构的教学行为解读

从教学行为的视角看化学课堂教学,教的行为与学的行为共生共存,形成"教学行为对";若干个教学行为对按一定方式连接在一起形成了“教学行为链”,也就是一个具体的教学活动;若干个教学行为链组合起来形成“教学板块”,就可完成一个明确的教学任务。这样,就以教学行为为基础,以复杂性科学的系统论、融贯论为指导,从另一视角认识了化学课堂的结构,这对于课堂观察、教学设计、教学行为优化等研究以及化学教师的专业发展都具有重要意义。     

工科基础化学知识板块设计初探

分析了国内基础化学教学改革的状况和所面临的困难,提出工科化工类基础化学教学内容应从一级学科———化学出发设计知识板块。提出了工科基础化学知识板块设计的一些见解。     

基于核心素养的化学教学目标设计策略

以“化学中常用的物理量--物质的量”为例,介绍了课程目标、单元教学目标和课时教学目标的转化。结合教材内容,分析了基于核心素养制订教学目标的策略,分别有:基于三维目标升华的策略、基于双向细目表的策略和基于教学板块与学习任务的策略。     

“化学实验教学研究”课程的改革探索与实践

重庆师范大学化学学院坚持“以本为本”,针对当前“化学实验教学研究”课程教学存在的问题,开展了教学改革实践探索。改革的总体思路是瞄准“一夯实两提升”,即夯实师范生实验操作技能、提升师范生实验教学能力和实验创新能力的课程目标,构建以“七项训练任务”为核心的课程教学改革内容。采取了包括基于板块任务法开展教学设计训练、基于模型认知开展展示讲解训练、基于模拟授课开展实验探究指导训练、基于素养表现开展实验教学评价训练、基于创新视角开展实验创新能力训练和基于专业发展开展实验反思能力训练等策略的课堂教学改革,成效显著。师范生的各项能力得到不同程度的发展。     

"以学论教"的化学课堂教学评价体系的构建

在反思“以教论教”传统课堂教学评价的基础上,分析了“以学论教”的课堂教学评价内涵和特点,并在此基础上从“学生学的行为”、“教师教的行为”、“教学内容”和“教学目标实现”4方面围绕过程、内容、结果3个学习维度构建了化学课堂教学评价体系。     

化学课堂教学情境的评价研究——基于化学“优质课”教学情境的分析

在文献分析的基础上,提出从功能特征和构成特征2大维度评价化学课堂教学情境,并建构了化学课堂中优质教学情境的评价标准,对几节化学“优质课”的教学情境质量进行了评价,并分析了这些“优质课”中教学情境的特征,指出了教学情境设计中的优点及存在的问题.     

设计系列化学实验优化化学实验教学的研究和实践

在化学实验教学中,结合现代教育理论,探讨了“阶梯式”、“精深式”、“激趣式”和“创新式”系列化学实验的设计,以支持和促进学生的学习,努力构建一种从实验中连贯建构知识意义的教学过程,提高化学实验教学的有效性。     

化学课堂教学目标探析

制定化学课堂教学目标是教师进行教学设计的重要环节.本文结合中学化学教学实际,对化学课堂教学目标的含义、分类、功能以及化学课堂教学目标的确定和陈述做了较系统的阐述和分析,明确提出制定课堂教学目标是化学教师的教学基本功之一.     

化学类专业课程思政要素与途径的探索和实践

探讨了化学类专业课程思政要素、教学方法和途径,提出了“六维度、四构建”思政教学策略。从化学中的哲学思想、化学的价值观、化学科学精神、化学思维方法、化学伦理、化学文化“六维度”确定化学类专业课程思政要素;以教学目标创建为基础、教学内容和教学资源重构为重点、教学方法构建为关键、成绩评定体系建立为保障的“四构建”系统设计课程思政的教学方法和途径。基于“六维度、四构建”课程思政策略,对无机及分析化学课程进行了教学实践。实施结果表明,这些策略能有效提高课程育人的针对性和有效性,为高校同类课程思政建设提供一个可借鉴的思路和模式。     

以学论教化学课堂教学评价量表及其构建

以学论教是基础教育课程改革提出的新的课堂教学评价观。依据以学论教的内涵和特点,以“学生学的行为”、“教师教的行为”、“教学内容”和“教学目标实现”4方面围绕过程、内容、结果3个学习纬度,通过课堂教学评价实践的应用完善,构建了以学论教化学课堂教学评价量表;围绕量表的使用,介绍了该评价量表指标及其观测点的特点及评价注意点。     

Furyl- and thienyl-silatranes and germatranes

We review our research on the synthesis and study of the physical and biological properties of furyl- and thienylgermatranes and -silatranes.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 725–732, June, 1992.     

Review and patents and literature

The use of the insect cell/baculovirus expression system for producing recombinant proteins of bacterial, plant, insect, and mammalian origin has become widespread. The popularity of this eukaryotic expression system is due to many factors, including (1) potentially high protein expression levels, (2) ease and speed of genetic engineering, (3) ability to accommodate large DNA inserts, (4) protein processing similar to higher eukaryotic cells (e.g., mammalian cells), and (5) ease of insect cell growth (e.g., suspension growth). The following review of the literature discusses two engineering aspects of recombinant protein synthesis by insect cell cultures: bioreactor scale-up and insect cell line selection. Following this review patent abstracts and additional literature pertaining to expression of recombinant proteins in insect cell culture are listed.     

多环芳二酐型聚酯亚胺膜的透气性能

多环芳二酐型聚酯亚胺膜的透气性能李悦生，丁孟贤，徐纪平（浙江大学高分子科学与工程研究所，杭州，３１００２７）（中国科学院长春应用化学研究所）关键词聚醚酰亚胺，聚酯酰亚胺，膜，透气性通常的聚酰亚胺加工性能较差，在芳环二酐的苯环间引入醚键等柔性基团后，其...     

微量元素与疾病诊断治疗的研究现状及展望

对国内外微量元素与疾病的关系及其诊断治疗的研究现状及研究动向进行了综述，包括：微量元素与地方病、癌肿、心血管病、糖尿病、眼病、神经系统病等。参考文献72篇。     

Preparation and photolysis of poly-p-ethylacrylophenone and poly-p-chloroacrylophenone and their copolymers with styrene and methyl methacrylate

Poly-p-ethylacrylophenone (PPEtAP) and poly-p-chloroacrylophenone (PPClAP) and their copolymers with styrene (PEtAP/S) and (PClAP/S) and with methyl methacrylate (PEtAP/MMA) and (PClAP/MMA) were prepared. Quantum yields of main-chain scissions at 366 nm at room temperature in benzene solution are of the same order as those of the unsubstituted polyacrylophenone and its copolymers. Substitution with chlorine and ethyl group in the para position compared to the unsubstituted polyacrylophenone and its copolymers leads to an increase of the lifetime for the n–π^* excited triplet state, as is evident from the measured quenching constants of photolysis. The low-temperature emission spectra of the copolymers are similar to the spectra of the model compounds in a polymer film. For the homopolymer, however, the character of the emission spectrum changes considerably.     

Concentrations and distributions of trace and minor elements in Chinese and Canadian coals and ashes

A total of 35 trace and minor elements including some of environmental significance were determined in each of a selection of 15 Chinese and 6 Canadian thermal coals and their ashes by using the SLOWPOKE-2 nuclear reactor facility of the University of Toronto. The concentrations and distributions of these constituents among the coals and their combustion products (viz. ash and volatile matter) are presented together with an interpretation of their significance in relation to the large scale combustion of these coals as thermal fuels in industrialized countries such as China and Canada. The detailed results showed wide variations in trace impurity concentrations (up to a factor of 100 and more) among the coals studied with few large differences between those of Chinese and Canadian origin except that the rare earths, Sc, Th, U, I, and Se were much higher in the former, other halogens, As and Na were lower. Values for elemental enrichment factors (EF) relative to normal crustal abundances indicated that only As(EF=13), Br(5.7), I(16), S(230), Sb(11) and Se(320) were appreciably enriched in coal. During static ashing at 750°C most of the halogens, S and Se were volatilized whereas most other inorganic constituents were highly retained and concentrated in the ash by factors of 6 to 11.