用PowerPoint 2000制作天然药物化学教学课件

介绍利用Chem3Wind化学结构式绘制软件、PowerPoint幻灯片制作软件制作黄酮类化合物结构分类教学课件的过程,以期抛砖引玉,让更多更优秀的天然药物化学教学课件应运而生。     

工科无机化学多媒体课件的制作与课堂实践

在教学实践基础上,制作并完善了具有专业特色的无机化学多媒体教学软件,并用于教学实践。总结了课件制作的几点经验。展望了未来大学化学教学中多媒体技术的重要性及应用前景。     

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。     

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.     

自制小课件 提高教学效率和效果

在没有合适的计算机辅助教学(CAI)软件和开发一个完善的大型CAI软件需要大量人力物力的情况下,作者提出以自制小课件的办法逐步启动和加快CAI在大学化学教学中的应用.本文总结了小课件的制作、使用及发展趋势.     

方正奥思在有机化学课件中的应用

计算机模拟教学在近几年已经愈来愈普遍 ,虽然计算机模拟过程并不能完全代替实验 ,也不能取代实验动手能力的训练 ,但计算机模拟有助于对基本概念的深入思考 ,对掌握基本概念和预计实验结果都有很大帮助。我们在研制有机化学和有机化学实验的课件过程中 ,对教学中的重点、难点进行了分析 ,针对理论教学中的反应历程和实验教学中的预习等难点问题采取了动画组来表达 ,取得了很好的效果。　　我们自 1 999年 5月起开始制作有机化学及实验ＣＡＩ课件 ,先后采用过Ａｕｔｈｏｒｗａｒｅ、ＶＢ、方正奥思并结合Ｃｈｅｍｏｆｆｉｃｅ、Ｃｏｏｌ3Ｄ…     

交互仿真智能性课件运用于气体溶解教学初探

常见气体的溶解性研究一直是中学化学教学中的一个难点,笔者以Flash开发出的交互仿真智能性化学课件"常见气体在液体中的溶解性研究"为例,说明此类课件具有交互性、仿真智能性、探究性等特点。在多所中学试教后普遍反映良好,是对溶解度理论教学的补充,为溶解度的教学提供了有益的帮助,对溶解度这一知识点的教学进行了全新的探索。本文就此类课件的设计开发过程中的几个重要问题进行了陈述。     

结构化学课件的开发与应用

阐述了多媒体用于结构化学教学的意义与必要性,介绍了用Authorware6.0组装制作的结构化学多媒体教学课件的逻辑结构和特点。探讨了采用计算机三维动画和多媒体技术描述结构化学中部分抽象问题的方法。     

计算机辅助教学在分析化学课堂上的应用

利用PowerPoint、Flash软件制作电子课件，谈计算机辅助课堂教学的几种技巧。     

《高分子物理》课程多媒体课件的设计与制作

结合《高分子物理》课程的教学特点,运用多媒体制作软件Authorware 7.0和Powerpiont2000,Flash MX制作多媒体教学课件,取得了较理想的教学效果。     

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。     

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.     

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.     

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。     

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.     

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。