一道化学动力学题的研讨

把一道化学动力学题的内容形式和解题方法做三种变化处理，能达到启发思维、增强兴趣的效果，并能更全面、深刻地理解化学反应动力学原理。     

小波变换应用于Cu~(2+)离子催化振荡化学体系的频率分析

利用连续小波变换的多分辨特性分析了Cu2+催化振荡体系的频率特征,得出了其特征频率值.由此反映出了该振荡体系具有多频特性.通过其正、负反馈反应机理分析了体系中多频特性形成的原因.     

络合返滴定终点误差探讨

本文详细地讨论了络合返滴定终点误差的具体算式及其影响因素。     

普通高中教师在计算机辅助化学教学中基本情况的调查分析

为了更好地发挥计算机在辅助化学教学中的作用,问卷调查了普通高中教师在计算机辅助化学教学中的基本情况。说明在化学教学中开展计算机辅助具有一定的条件支持,教师可以考虑开展基于积件的计算机辅助教学,选择适当的教学内容进行,并与传统教学方式达到最佳组合,多进行师生间的沟通,从而使计算机辅助教学能够更好地促进学生的发展。     

过氧化钠与一氧化氮、二氧化氮反应探究

通过实验证明ＮＯ、ＮＯ２均能与Ｎａ２Ｏ２直接反应，并从化学热力学角度进行了分析     

Diffusion-Controlled Adsorption Kinetics of Triton X-100 at Air/Solution Interface

Theadsorptionkineticsofaqueoussurfactantsolu tionsatair/solutioninterfaceplaysamostimportantroleinwetting ,foamstability ,emulsionstability,fastcoat ing,detergency ,surfaceoscillation ,adsorptivebubbleseparationtechnique,etc.Theadsorption processcon sistsoftwosteps:thefirststepisthetransportofsurfac tantmoleculesfromthebulkphasetothesubsurfaceduetoaconcentrationgradient,i.e .thediffusionstep;thesecondoneisthetransportofmoleculesfromthesubsur facetothesurface,i.e.theadsorptionstep.Iftherateofth…     

The effects of baseball bat mass properties on swing mechanics,ground reaction forces,and swing timing

Swing trajectory and ground reaction forces (GRF) of 30 collegiate baseball batters hitting a pitched ball were compared between a standard bat, a bat with extra weight about its barrel, and a bat with extra weight in its handle. It was hypothesised that when compared to a standard bat, only a handle-weighted bat would produce equivalent bat kinematics. It was also hypothesised that hitters would not produce equivalent GRFs for each weighted bat, but would maintain equivalent timing when compared to a standard bat. Data were collected utilising a 500 Hz motion capture system and 1,000 Hz force plate system. Data between bats were considered equivalent when the 95% confidence interval of the difference was contained entirely within ±5% of the standard bat mean value. The handle-weighted bat had equivalent kinematics, whereas the barrel-weighted bat did not. Both weighted bats had equivalent peak GRF variables. Neither weighted bat maintained equivalence in the timing of bat kinematics and some peak GRFs. The ability to maintain swing kinematics with a handle-weighted bat may have implications for swing training and warm-up. However, altered timings of kinematics and kinetics require further research to understand the implications on returning to a conventionally weighted bat.     

催化动力学光度法测定痕量铜的综述

本文综述我国催化动力学光度法测定痕量铜的状况,提出一些尚待开发新指示反应的设想,并介绍提高催化动力学法灵敏度的两个新途径。     

溶剂法聚苯乙烯/粘土纳米复合材料的研究

介绍了采用大分子溶液直接插层有机粘土制备聚苯乙烯／粘土纳米复合材料合成技术．实验结果表明：聚苯乙烯大分子链在柠烯溶液中有着极好的溶剂化作用，与改性有机粘土能够发生有效插层作用，同时粘土剥离物增强材料可以纳米级尺寸均匀分布在聚合物基体．阐述了插层剂选择及有关阳离子表面活性剂分子修饰原则及合成原理以及重点讨论了聚合物溶液直接插层原理及热力学条件和影响因素。     

化控技术在淮北地区小麦生产上应用前景

小麦倒伏问题在很大程度上制约了小麦产量的进一步提高，化控技术为解决这一问题提供了极大的可能性．化控技术的应用，可以充分发挥品种遗传和生理上的潜力，对作物实行外部形态和内部生理的双重调控，使之向着人们预期的目标发展，最终有利于产量和品质的提高．