案例教学法在分析化学理论教学中的实践研究

研究了案例教学法在分析化学理论教学中的实践,内容包括案例选材、设计、实施和案例模型评估。案例教学法模式在促进学生扎实学习理论知识的同时,改进学生对于分析化学课程的认知,提高学生的专业技能。案例教学法在分析化学理论教学中的实践可以在教师教学和学生学习之间建立良好的互动关系,并最终改善分析化学课程教学。     

高等学校化工安全管理课程案例教学法初探

以高等学校培养工科类专业学生为背景,探讨案例教学法在化工安全管理课程中的必要性和可行性,采用具体案例说明教学过程,并根据调查问卷的结果对案例教学法的实施效果进行评价,对不尽人意之处提出改进措施。     

高分子物理课程中的典型案例教学

案例教学法与传统教学法相比,具有自身的优点.本文针对影响高分子链柔顺因素的讲授,根据授课内容、方式和学时安排,就典型案例教学实施,从典型案例教学的准备、典型案例教学过程等方面,对教师和学生提出的要求进行合理的安排.并阐述了典型案例教学的益处,说明应用案例教学可以达到事半功倍的效果.     

PBL教学法在大学有机化学实验教学中的研究与实践

以苯甲酸正丁酯的合成为案例,将以问题为基础的教学法(problem-based learning,PBL)应用于大学有机化学实验教学。实践表明,PBL教学法能够显著增强学生的实验兴趣,培养学生的综合实验能力,提高实验教学质量。     

任务情景教学法在化学教学中的应用

任务情景教学法是一种突出学生主体地位的教学方式,利于从真正意义上实现以学生为主体,切实培养学生的自主学习能力、实践能力和创新能力的理念。结合案例研讨了在高中化学教学中运用任务情景教学法引导学生进行自主探究,实施合作学习并培养学习能力的相关举措。     

热点案例在药物化学教学中的应用探讨

案例教学二十世纪初起源于"哈佛大学",后被逐渐推广在各种教育教学活动中。面对高等教育"大众化"进程、"注重能力"目标定位,结合制药行业应用型人才需求,在药物化学课堂教学中应用热点案例教学法,能够启发学生主动思维、激发学习兴趣,有助于培养学生创新能力及综合素质,提升教学效果。     

考古化学课程建设探索与实践

介绍了文理交叉课程"考古化学"的建设情况,包括课程内容、教学团队及教学方法等。课程团队根据课程特点,充分考虑选课学生不同专业背景,构建了网上教学平台分享教学资料,同时建立课堂微信群加强师生交流和讨论,并在课堂中引入"以案例为基础"(Case-Based Leaning,CBL)的教学法,开展以案例为基础、学生为主体、教师讲解为辅助指导的教学模式,有效激发了学生的学习兴趣,取得了良好的教学效果。     

案例教学法在仪器分析教学中的应用

针对案例教学法在仪器分析教学中的应用,就案例如何选择、案例如何编写、案例如何实施等几个环节进行了阐释,并提出了自己的方案。     

采用案例教学法培养学生创新思维习惯

结合自然科学思想史 ,阐明如何在基础化学课程教学中实施案例式教学法。建议教师在讲授科学的基本原理和知识的同时 ,追踪科学的发展历程 ,把科学发现的全过程再现在学生面前 ,让学生有机会感受知识的产生和发展过程。将理论知识的学习和分析问题、解决问题的能力培养有机地结合起来     

多学科交融教学模式在《高分子化学》课程中的应用研究

基于《高分子化学》课程的特点和教学体会,在教学内容和教学方式上进行了设计,以聚合方法的分类为主线,将多学科交融教学模式融入到高分子化学课程教学中,与板块联系性教学法、案例教学法、验证性教学法相结合,并通过实验平台的搭建,理论联系实际,夯实学生学习效果,典型实验设计已通过实验验证,并撰写了论文。结合笔者自身的教学体会,分析和阐明了该教学模式在优化教师的教学效果,提升学生综合素质中所起的作用以及在其它课程当中的应用性。     

逆向案例教学法在普通化学教学中的应用及体会

分析了普通化学课程目前在教学环节所存在的问题,并针对这些问题提出了逆向案例教学法的改革举措。     

普通化学案例教学与学生自主学习能力的培养

通过三个案例教学实践,探讨在普通化学模块化教学中如何将教师的有效引导与学生的自主学习相结合。倡导以学生为主体、以能力输出为导向的人才培养模式,实现工科专业学生化学素养的提高和自主学习能力的提升。     

空腔型纳米炭的制备与应用

空腔型纳米炭具有低密度、高表面积/体积比、较大的内部空间及可调的炭壳厚度和孔隙结构等特性,在新材料和新能源等相关领域展现出巨大的应用潜力,成为目前多孔炭材料研究的重要分支.本文讨论了空腔型纳米炭的制备方法及其形貌结构的调控思路,分析了不同方法的优缺点;综合评述了其在能源存储、催化转化、吸附分离和生物医药领域的应用进展,并对现存问题及发展趋势进行了总结与展望.     

纳米四氧化三铁(Fe3O4)的制备和形貌

纳米Fe₃O₄因其特殊的理化性质和在生物医学领域潜在的应用价值而得到广泛研究。本文综述了纳米Fe3O4的制备方法，包括直流电弧等离子体法、热分解方法、沉淀法、水热法、电化学法、微乳液法、溶胶-凝胶法、有机物模板法、回流法等，结合作者在Fe3O4纳米粒子制备方面的最新工作，介绍了Fe3O4纳米粒子的新颖形貌。对纳米级Fe3O4制备研究的发展趋势进行了展望。     

Thin-layer electrophoretic behaviour of oligo- and mono-saccharides, uronic acids and polyhydroxy compounds obtained as biomass degradation products

A recently developed thin-layer electrophoretic method has been applied to the determination of biomass degradation products comprising mono-, oligo- and polysaccharides and their derivatives as well as phenolic compounds. The separation was carried out using 0.3 M aqueous borate solution as the buffer and silanized silica gel as the support, the surface of the latter being covered with a thin film of octanol-1. For visualization of the carbohydrates, specific sulphuric acid-containing naphthoresorcinol and orcinol reagents were applied. The mobility of hydrolyzed products is determined by the number and position of their reactive sites and, to a less extent, by the size of their molecule. The good separations obtained confirm this method as an alternative to the commonly utilized chromatographic procedures.     

Determination of novel complexing agents in pulp and paper mill effluents and in lake water by liquid chromatography

A simple and sensitive high performance liquid chromatographic (HPLC) method with UV detection was developed for the determination of new diethanolamine derivative complexing agents. The quantitation of three complexing agents was accomplished as their Cu(II) complexes and their separation on a reversed phase C18 column using 0.01 M tetrabutyl ammoniumhydroxide and methanol as isocratic mobile phase. The limit of detection (LOD) ranges from 0.1 to 2.0 mg/l and the method has a wide linear range, from LOD to 150 mg/l. The method was successfully applied for the analysis of lake water and wastewater effluent from pulp and paper mill spiked with studied complexing agents.     

Fast and efficient separation of cytokinins from auxin and abscisic acid and their purification using mixed-mode solid-phase extraction

A method for separation of cytokinins from auxin and abscisic acid, which allows further separation of cytokinin ribotides from cytokinin bases, ribosides and glucosides and their purification on a single Oasis MCX column was developed. Due to the mixed reversed-phase and cation-exchange mode of the Oasis MCX sorbent the cationic cytokinin bases, ribosides and glucosides as well as the anionic auxin, abscisic acid and cytokinin ribotides are retained and can be sequentially eluted by solvents containing different concentrations of methanol and ammonium hydroxide. Characteristics of the method are high recoveries of analyzed phytohormones and their sufficient purity for quantification by HPLC–ELISA (RIA) or HPLC–MS.     

Column purification and HPLC determination of teicoplanin and A40926

Summary A simple HPLC method for quali- and quantitative determination of teicoplanin and A40926 in fermentation broths and in biological fluids is described. The sample is purified on affinity chromatography and then analyzed on a reverse phase column using a gradient phosphate buffer-acetonitrile as mobile phase and UV detection at 254 nm. No interference from endogenous sources has been observed. The analytical method, with partial modifications, was also used to isolate on semipreparative scale the single components of these antibiotics, in order to investigate their structure and their biological activity.     

Synthesis and properties of the chiral oligonaphthalenes

Helical oligonaphthalenes were constructed by bottom-up synthesis (repeating dimerization reactions), their absolute configurations were determined by an exciton chirality method and their functions, such as energy transfer, are also reported.     

A new method for the radiochemical separation of rubidium and cesium

The analytical reactions of bismuth iodide and stannic chloride with cesium and rubidium are used for the radiochemical separation of these two elements. The method consists in precipitating potassium, rubidium and cesium as their cobaltinitrites, selective isolation of cesium as cesium bismuth iodide from glacial acetic acid, and subsequent separation of rubidium from potassium as chlorostannate from conc. HCl. The results obtained by the present method for the rubidium and cesium contents of the different U.S.G.S. standard rock samples are compared with those reported using methods of comparable accuracy. The suitability of the method for the analysis of fall-out samples for their radiocesium (¹³⁷Cs) contents has been demonstrated.