仪器分析课程教学改革与实践

介绍华中农业大学理学院对仪器分析课程教学进行的各项改革和实践。不断创新教学方法和教学手段,提出了“五位一体”的教学新模式和多元化的考核体系。学生的学习兴趣、教学质量和教学效果不断提高。     

浅议聚合物流变学课程的教学内容改革

目前聚合物流变学课程在我国高分子材料与工程专业本科教学中还存在不少的问题,如学科发展缓慢,教材偏少,习题缺乏等,本文对其现状进行了分析.根据我校实际的情况和学生的特点,提出了课程改革的思路,并对现行教材的内容、结构体系与教学方法进行了改革探讨.构建了合理的课程教学体系,使课程结构得到进一步的优化,教学内容更为合理,教学方法更为直观和生动.通过实践改革,同学们的学习目标更为明确,学习兴趣增加,聚合物流变学课程的教学质量得到了明显的提高.     

发展中的化学科学课程的全方位构建

发展中的化学科学课程是大类生化地专业学生的通识平台课程.根据发展中的化学科学课程特点和教学内容,在教学目标、课程内容体系构建、课程建设特色、教学方法以及考核评价体系等方面进行了探讨.     

MOOC建设的着力点和解决的主要教学问题——以无机及分析化学MOOC建设与SPOC教学实践为例

紧扣MOOC建设的着力点和解决的主要教学问题,有目的性、导向性地建设MOOC和开展教学实践,构建以学生自主学习为主的新型课程教学体系,通过教学方法和考核方式等的改革,将学习的自主权交给学生。     

“有机化学”开放式精品示范课程建设与实践

以中南大学化学类专业本科生的重要基础课程“有机化学”为例,探讨开放式精品示范课程改革。为适应现今信息化的高速发展和大学生特点,从创新课程教学着眼点、创新课程教学方法、课程教学效果等方面,阐述了开放式精品示范课程建设与实践的思路。基于网络的自主学习、课堂的互动交流、实验实践的拓展提升、科学合理的多元化课程考核,有效地提高了学生的学习兴趣与积极性,得到了良好的教学效果。     

基于雨课堂+企业微信+慕课的在线直播教学——以有机化学为例

主要介绍了基于雨课堂和企业微信双平台直播教学,以及同步慕课课程为辅的有机化学在线教学实践,并以教学实例展示了“学生为中心,教师为引导”的“疑探”式教学体系。该在线直播教学还融入以弹幕、微信群和小组作业为主的交互方式,注重学生与学生、学生与教师以及学生与教学资源的互动;通过构建多维度的考核体系,加强对学习过程的考核,提高学生学习的主动性和参与度。     

以学生发展为中心的无机化学课程立体化考核评价模式构建与实践

针对当前地方本科院校无机化学课程考核中存在的问题,以学生为中心,关注学习过程,并注重学生发展,构建了以学生发展为中心的无机化学课程立体化考核评价模式,弥补了终结性评价的不足。教学实践表明,该考核模式实施后,不仅学生的无机化学I和无机化学Ⅱ课程考试成绩分别提高了12.17%和13.92%,而且有效地激发了学生的学习兴趣,促进了教师教学方式的改变和学生学风的转变,实现了考试评价改革和课堂教学改革有机结合,提升了人才培养质量。     

结构化学课程教学改革的探讨与实践

针对结构化学课程教学目的和现状，对该课程教学改革提出几点建议：①强调学习结构化学课程的重要性与必要性；②注重量子化学发展史和研究结构化学的科学方法的介绍，培养学生的科学素质。③改进课程教学方法，培养学生创新能力。④采用结构分制进行考核。     

基于工程教育认证的课程评价方案设计与实践——以《高分子物理》为例

针对目前课程评价体系中存在的以总结性评价为主、忽略学习过程、期末试卷主要考察背诵、课后作业敷衍等问题,基于工程教育认证核心理念对课程评价体系进行了设计,包括按照"成果导向教育"为指导来组织期末考试试卷,"以学生为中心"来设计作业模式和引入形成性评价以达到"持续改进"效果三种主要措施。在《高分子物理》课程中实践了新的课程评价方案,期末考核结果及对学生的问卷调查都表明课程评价方案改革取得了很好的效果。     

医学院校无机化学实验课程考核评价体系的探索与实践

针对当前无机化学实验教学中存在的问题,改革了无机化学实验课程的考核办法和评分标准,提出了"多元化实验考核模式",并进行实践应用。教学实践证明:通过完善实验考核办法和评价体系,对学生的实验成绩有一个公平、准确的评价,可以激发学生的实验兴趣,提高学生的实验动手能力和分析、解决问题的能力。     

"Alpha"-, "beta"- and "delta"-anhydrodigitoxigenin

The syntheses of 3β-hydroxy-5β-carda-14, 20:22-dienolide (= «β»-anhydro-), 3β-hydroxy-5β-carda-8:14, 20:22-dienolide (= «α»-anhydro-) and «δ»-anhydro-digitoxigenin (= probably 3β-hydroxy-5β, 14β-carda-8, 20:22-dienolide) by the best ways known to date, have been described. «δ»-Anhydro-digitoxigenin represents the thermodynamically most stable isomer. In this isomer the double bond in position 8 is unaffected by hydrogenation with Pt in acetic acid; with perbenzoic acid an epoxide results from which, on hydrogenation, the double bond can be regenerated in its original position. Analogous reactions are known to occur in the 8:14-epoxides.     

化“材”为“筑”

Chemistry is a central, practical and creative discipline. The development of chemistry plays an important role in the progress of science and society, as well as the improvement of the quality of human life. This paper introduces the chemical knowledge of stone, concrete, glass and other inorganic nonmetallic building materials by the anthropomorphically story. Taking nanomaterials as an example, the prospect of building materials development in the future is put forward.     

"Turn-on" fluorescent sensing with "reactive" probes

Chemical probes are valuable tools for the investigation of biochemical processes, diagnosis of disease markers, detection of hazardous compounds, and other purposes. Therefore, the development of chemical probes continues to grow through various approaches with different disciplines and design strategies. Fluorescent probes have received much attention because they are sensitive and easy-to-operate, in general. To realize desired selectivity toward a given analyte, the recognition site of a fluorescent probe is designed in such a way to maximize the binding interactions, usually through weak molecular forces such as hydrogen bonding, toward the analyte over other competing ones. In addition to such a supramolecular approach, the development of fluorescent probes that sense analytes through chemical reactions has witnessed its usefulness for achieving high selectivity, in many cases, superior to that obtainable by the supramolecular approach. Creative incorporations of the reactive groups to latent fluorophores have provided novel chemical probes for various analytes. In this feature article, we overview the recent progress in the development of turn-on fluorescent probes that are operating through chemical reactions triggered by target analytes. Various chemical reactions have been implemented in the development of many reactive probes with very high selectivity and sensitivity toward target analytes. A major emphasis has been focused on the type of chemical reactions utilized, with the hope that further explorations can be made with new chemical reactions to develop reactive probes useful for various applications.     

Making "wheels" and "cubes" from triangles

[Mn(IV)Mn(II)3] triangular units directed by the presence of tripodal alcohols self-assemble in the presence of azide and acetate ligands to form either a [Mn24] "wheel" or a [Mn32] "cube".     

"Clickable" polymersomes

Polymersomes, composed of amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA), with the periphery being covered with azide groups, were used for further functionalization using "click" chemistry.