Flash多媒体技术在仪器分析教学中的应用

采用Flash多媒体制作技术实现分析仪器设备的计算机交互模拟演示 ,内容具有强大的绘图、音乐编辑、动画控制功能 ;提出了在软件制作过程中的 3个创新点 ,介绍了该软件的框架结构操作过程工具及未来的发展展望     

多种软件整合在制作化学实验CAI课件中的应用

以Flash软件为主要工具,结合Word、ChemDraw、Chem3D、Photoshop和"硕思闪客精灵"等多种软件制作了化学实验CAI课件;该文介绍了课件的制作流程和方法,并对将多种软件整合应用于化学实验CAI课件制作中的优势进行了详细的讨论.     

用PowerPoint 2003轻松做课件

PowerPoint(PPT)是经常被用到的多媒体工具软件,新的PPT2003更新添了很多实用的功能。笔者结合自己制作课件的经历,分别从文稿输入、格式修改、动画制作、控件使用四个方面,介绍制作课件的技巧,与广大同行或有共同爱好者一起切磋讨论。     

结构化学计算机辅助教学课件的开发及教学实践

根据教师对结构化学的教学思路和学生的认知规律,针对教学难点,用Flash、3DMAX等工具制作动画和图形,用PowerPoint制作结构化学教学辅助课件并用于教学实践。结果表明课件有助于学生克服空间想象力和抽象思维能力的困难,理解和掌握抽象的概念和规律以及训练和培养学生的逻辑思维能力。     

高分子化学多媒体教学系统的开发

利用当前通用的多媒体技术、以多媒体制作工具Authorware为主,高级语言VB及其它一些主流的媒体创作工具为辅,设计了高分子化学多媒体教学系统。它由八个模块组成,即绪论、自由基聚合、自由基共聚合、离子聚合反应、配位聚合反应、连锁聚合实施方法、逐步聚合反应、聚合物的化学反应。每个模块又分为四部分,即具体章节、本章要求、知识拓展及课后作业。采用接口技术,实现了内容的录入、删除、修改、访查以及资料查阅等诸多功能。它不仅可以作为高分子化学课程课堂教学使用,又可作为本专业学生及相关专业学生有效地进行高分子化学课后复习、习题训练、自学并阅读课外参考资料。该教学系统使用方便、操作简单、针对性强,是一种较实用的计算机辅助教学工具。     

基于化学史与多媒体技术整合的氯气教学设计

化学教学中渗透化学史是提升学生科学素养的有效途径。研究选取了高中化学"氯气"一节为例, 沿着氯气发现史设计了多媒体课件, 以动画的形式重现氯气的发现、性质研究到应用开发的历史过程, 通过课件创设的启发提问-探究讨论-归纳总结等活动来深入挖掘化学史背后蕴藏的化学知识与原理, 使学生在体验科学探究过程、培养科学思维与方法的同时学习氯气的物理性质和化学性质, 进而体现了利用化学科学史与多媒体技术整合制作多媒体课件来培养学生科学素养的新教学探索途径。     

对Chem Window软件使用的补充

对ＣｈｅｍＷｉｎｄｏｗ软件使用的补充大学化学王雷陈怡莎（广州师范大学化学系５１０４００）ＣｈｅｍＷｉｎｄｏｗ软件是化学工作者的强大工具之一，有了ＣｈｅｍＷｉｎｄｏｗ可以方便地画出各种化学结构式，对大家发表论文，制作投影及幻灯片等十分有用。《大学化学》...     

提高化学CAI课件制作效率的一种实用方法

PowerPoint 2000是Microsoft Office 2000系列软件的一个重要组成部分。它非常适合于制作和播放各类多媒体演示文稿,如幻灯片、论文讲稿等等。许多教师都使用PowerPoint 2000制作多媒体CAI课件,用于辅助课堂教学,起到了非常好的教学效果。然而许多化学教师在使用PowerPomt 2000制作化学CAI课件时,常常会觉得有些美中不足。这是因为化学CAI课件中大量常用的化学分子式、结构式、     

PPT文件中的动画制作及在教学中的应用

介绍了利用PowerPoint软件的自定义动画中的"进入"、"强调"、"退出"、"动作路径"四类效果,制作教学中常用的化学结构式、图表、原理图、选择题等的动画制作的方法,以及常用图表的讲解、重点内容的强调、利用现有矢量性质剪帖画改制成自己所需图画的简易方法.PPT文件制作动画,操作简单,避免了超链接的麻烦,形成的文件小,便于拷贝,可制作出具有Flash效果的漂亮、生动的动画,丰富了教学内容、提升了教学效果.     

一部具有特色的结构化学多媒体教材

由兰州大学李炳瑞教授编著的《结构化学》多媒体版教材,已由高等教育出版社出版。这部由教育部资助编著、制作的“十五”国家级规划教材包括一本教科书(407页)和一张CD盘(容量426M),用于高校化学专业的结构化学教学。作为我国结构化学的第一部内容比较完整、可用计算机教学的多     

利用手持技术改进测定乙醇分子结构实验

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。     

光谱仪测试范围的扩展

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。     

Neutral diterpenoids of oleoresins of five species of conifers of Transcarpathia

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.     

Dichroism of absorption and polarization of phosphorescence of molecules of the closed form of nitrobenzospirothiopyran

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.     

Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin

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.     

Determination of heats of detonation and influence of components of composite explosives on heats of detonation of high explosives

The heats of detonation of 20 simple high explosives and explosive mixtures were determined by means of an adiabatic detonation calorimeter designed by the authors. The results indicated that the performance of the instrument was reliable and the experimental data were very accurate. For explosive mixtures, there was a linear accumulative relationship between the heats of detonation of the explosive mixture and its components. Accordingly, the heats of detonation of explosive mixtures could be calculated directly from the heats of detonation of simple explosives and the characteristic heats of other components. The experiments showed that the gold or brass shell of the cylindrical charge could be substituted by a thick-walled porcelain shell, which had the advantage of cheapness.

     

物质分配系数的测定实验改进

实验教学目的是从解决实际问题出发,以实验技术训练和实验设计思想培养为目标。介绍了将单一的物质分配系数测定实验改进为综合实验,提高了实验效果及实验资源利用率。     

Calculation of enthalpies of hydrogenation of hydrocarbons

Sets of hydrogen molecule equivalents have been developed which permit the calculation of hydrogenation of different types of carbon-carbon bonds from ab initio total energies (3-21G and 6-31G* basis sets, and, to a more limited extent, for MP2/6-31G* data) of reactants and products. The calculated enthalpies of hydrogenation are in good agreement with experiment for unstrained molecules, with average errors on the order of 2 kcal/mol. The 6-31G* equivalents allow the enthalpies for strained molecules to be calculated accurately, but the 3-21G equivalents do not. The equivalents for both basis sets have been tested by calculating the enthalpies of hydrogenation of carbon-carbon bonds in nitrogen- and oxygen-containing organic molecules, free radicals, and classical carbocations. The results are in good agreement with experiment in most cases.     

非那雄胺合成工艺改进

非那雄胺能抑制5α-还原酶的活性,明显降低二氢睾酮水平,是一种治疗良性前列腺增生的有效药品。该合成工艺以甾烯酮酸为原料,将其与氯化亚砜反应,无须分离即与叔丁胺反应得17β-酰胺化合物,再氧化开环,环合,氢化,脱氢合成了非那雄胺。经元素分析、IR、1HNMR、13CNMR、MS分析表征了其结构。该法无须使用昂贵的2,2-二吡啶二硫化物和剧毒药品苯亚硒酸酐,且以乙酸铵代替氨气,降低了对设备的要求和腐蚀,更适用于工业生产。