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通过对香港麦美伦版和大陆高中课程标准人教版、鲁科版、苏教版4种教材“氮及其化合物”相关内容的比较,从教材的目标纬度、内容纬度、呈现方式纬度、实验纬度、习题纬度等方面分析了4种教材各自的编写特点,以期为两地的新课程教材改革提供借鉴和参考。 相似文献
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以新加坡初中化学Chemistry Matters教材为研究对象,对教材中涉及的实验案例、实验类型及数量进行了统计。结合新加坡新版科学教学大纲及PISA测试,从教材实验的内容选取、设计意图、呈现方式等方面进行分析,并对教材实验部分蕴含的核心素养进行一定程度地挖掘。研究得出:Chemistry Matters教材中实验的设置具有"内容选取彰显与时俱进,设计意图注重学以致用,呈现方式突出图表结合,活动过程强化问题引导"等特点。 相似文献
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原子是初中化学课程的重要知识内容,是初中学生学习的重点和难点之一,不同的教材内容和编排对学生的学习有着不同的效果。本文从内容体系、编写思路、呈现方式3个方面对中国和德国的4种初中化学教材中“原子”的编写进行比较。 相似文献
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实验在化学中有着独特的地位和作用,开篇实验的内容选择和呈现方式在一定程度上反映了教材编写者的课程理念。通过中德初中化学教材开篇实验内容及呈现方式的比较,来分析教材编写者在实验价值观及课程观方面的差异,德国教材注重方法指导和生活物品的开发,中国教材偏重于从变化的角度认识化学反应。从实验功能定位、实验实施主体、实验选材、实验提供的知识和学习目标定向几方面比较中德教材实验价值取向的不同。 相似文献
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以新人教版、新鲁科版和新苏教版的高中化学必修教材为样本,基于思政教育角度,结合高中思想政治课程标准和中国学生发展核心素养,对教材中涉及的思政元素内容进行界定和编码统计,并从内容维度、呈现位置、运用方式、联结方式等方面进行对比分析,发现新版教材中思政元素存在分布的着重点各有差异,运用的联结方式呈多样化和化学知识涵盖多重思政元素的特征。在发挥课程思政教学功能上,提出了依托教材编排特色、应用各项联结方式和融合现代信息技术的策略。 相似文献
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认真研究教材资源的组成、结构和编写意图, 对优化教学设计起着至关重要的作用。围绕如何促进实现三维教学目标, 阐述了充分利用教材资源的策略, 包括关注学生的已有知识及经验, 整合与改进某些内容及其呈现方式, 发挥课外实验的教学功能, 培养学生的学习兴趣、化学思想观念和科学素养等。 相似文献
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V. I. Bol'shakova L. I. Demenkova É. N. Shmidt V. A. Pentegova 《Chemistry of Natural Compounds》1989,24(6):691-694
The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988. 相似文献
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利用手持技术改进测定乙醇分子结构实验 总被引:1,自引:0,他引:1
利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。 相似文献
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由于石化行业的生产需要,其材质的使用具有多样性和广泛性,经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识,根据光谱仪的测试能力及标样的采集,实现了一个或几个元素测量范围的扩展,并对其测量的影响因素进行了研究。 相似文献
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Effect of the Method of Modification of Zeolite X on Selectivity of Catalytic Methylation of Toluene
Voloshyna Yu. G. Pertko O. P. Patrylak L. K. 《Theoretical and Experimental Chemistry》2019,54(6):395-400
Theoretical and Experimental Chemistry - The effect of the method of modification of catalysts based on zeolite X by cesium and magnesium cations (ion exchange and impregnation) on the selectivity... 相似文献
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Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin
E. I. Kapinus V. A. Ganzha B. M. Dzhagarov E. I. Sagun V. B. Pavlenko 《Theoretical and Experimental Chemistry》1989,25(2):146-151
The oxygen quenching rate constants for singlet and triplet excited states of the dimethyl ester of mesoporphyrin IX increase with decreasing viscosity of the medium and reach a maximum at a viscosity of approximately 0.4 mPa·sec, after which the rate constants begin to decrease. The drop in rate constant with increasing fluidity of the medium may be related to a nonequilibrium character of the elementary act in the interaction of the reactants in the solvent cage. In viscous media such as isopropyl alcohol, isobutyl alcohol, and isoamyl alcohol, the reaction radius is greater than the sum of the radii of the reacting particles. The long-range character of these processes is due to the relatively weak dependence of the quenching probability on distance.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 161–167, March–April, 1989. 相似文献
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The spectral-polarization characteristics of absorption and phosphorescence of molecules of the initial form of nitro-substituted
indolinospirobenzothiopyran were studied in oriented polyethylene films and in solutions with different polarity. An oscillator
model of the electron transitions responsible for the formation of absorption and luminescence spectra was suggested. It was
established that the principal differences in the spectral and photophysical properties of the compound studied and its oxygen-containing
analog are associated with the fact that the electronegativity of the S atom is lower than that of the O atom.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1143–1146, June, 1997. 相似文献
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Kopranenkov V. N. Makarova E. A. Dashkevich S. N. Luk'yanets E. A. 《Chemistry of Heterocyclic Compounds》1982,18(11):1218-1218
Chemistry of Heterocyclic Compounds - 相似文献