高师化学本科生微格教学效果的调查与分析——以河南师范大学化学化工学院为例

以河南师范大学化学化工学院为例,通过问卷调查、访谈和课堂观察,从2013级师资型本科生对微格教学的认识和态度、在微格教学中的参与情况、对微格教学的评价以及对微格教学的建议等4方面进行了调研,针对发现的问题,提出了加强师资队伍建设、调整微格教学内容、增强微格教学互动性、建立健全监督机制等4个方面的教学改进策略。     

本科生与研究生有机波谱分析课程教学差异对比

针对有机波谱分析课程,探讨了本科生与研究生在教材、教学主要内容、教学模式、教学实践及教学规划的侧重点等方面的差异。指出本科生教学侧重基础知识,难度不宜过高;而研究生教学注重原理、实践,注重学科发展及培养学生解决复杂图谱的能力。     

实施"警示示范"微格教学模式提高师范生实验教学技能

微格教学(microteaching)，是20世纪60年代由美国斯坦福大学推出的一种运用现代教育技术培训师资、提高教学技能的方法。40年来，世界上许多国家在师资培训过程中都引进了微格教学，并对其进行了广泛的研究与实践，提出了许多微格教学的模式，其中斯坦福大学的“行为改变模式”被世界许多国家所用。我国在微格教学的推广和实践中，基本上也采用斯坦福大学的模式进行教师技能培训。该模式的基本程序为：     

高分子化学双语教学的探索与体会

结合大学本科生高分子化学双语教学的体会,从双语教学的目标和意义、中英文教材的选择、双语教学授课模式及多媒体课件的制作、授课内容的调整与优化、双语教学方法的优化、双语教学效果的考核等方面,分析了本科生双语教学中应注意的几个重要环节,为提高高校本科生及研究生的双语授课教学水平提供参考与借鉴。     

微格教学在化学双语教师培养中的应用

为了探究微格教学在化学双语教师基本教学技能培养中的的应用和作用,以化学教育专业(民族班)的学生为研究对象,开展了"通过微格教学培养化学双语教师"的教学试验、探索活动,组织学生实施了有计划的化学微格教学训练和研究,并对相关结果进行了科学分析。结果表明,微格教学能够使学生较为全面地了解自己的缺点与不足,并逐步改进和完善教学技能,是我们在较短的时间里迅速提高化学双语教师基本教学技能的有效途径之一。     

培养教育硕士专业学位研究生教学与科研技能的创新实践

为提高教育硕士专业学位研究生的培养质量,切实有效地解决人才培养中存在的实际问题,在内蒙古师范大学进行了“理论学习-实践训练-科学研究”三位一体的课程群教学改革与实践。通过任课教师和指导教师的教研合力,将多样化的有利于研究生教学能力和研究能力提高的实践活动有机地融合到专业学位课程的理论学习过程中,形成了教育硕士专业学位研究生教学和科研技能并重的创新培养模式。     

高分子专业创新创业教育实践及实践基地建设研究

以我们学校高分子工程领域的人才培养模式为样本进行研究,探讨适合工科本科生及研究生培养的创新创业基地建设。通过对比分析国内创新创业实践教学基地建设研究,找出国内实践教学基地建设存在的问题,确定了解决这些问题的方法,从而使工科学生在理论知识和动手能力及创新思维积累方面得到一定的提高。培养出的本科生及研究生就业渠道拓宽。为企业培养了"留得住,用得上"的高分子材料工程实践和创新能力强的应用型高级人才。     

高师生微格教学技能训练模式研究——以化学师范生说课技能训练为例

在微格教学传统运作模式的基础上,根据说课技能的特点和要求,将说课技能训练和网络信息化结合,形成网络微格一体化技能训练模式,解决了微格教学效率低下问题,对加强高师生说课技能训练提供有益的参考。     

本科生与研究生环境化学课程教学内容和模式的差异

探讨本科生与研究生环境化学课程教学内容和模式上的差异,提出本科生教学以传授基础理论为主,以污染事件为切入点,强调系统性、趣味性和特色性,采用问题教学法、案例教学法和视频教学法等方法;而研究生教学以归纳总结知识点为主,关注研究热点和前沿问题,强调衔接性、主动性和应用性,采用互动教学法、体验教学法、文献归纳法等方法。     

现代化学数字化微格教学系统的构建

传统化学微格教学在场地、软硬件系统等方面存在不足,本文结合化学学科的特点,从化学教学技能的学习、微格教学训练与评价等方面,对现代化学数字化微格教学系统的构建进行了探讨。     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles

An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction

An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a–g and imidazo[1,5-a]quinoxalines 7a–h by the reaction of 2-imidazolyl anilines 4a–c with aryl aldehydes 5a–k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a–b was found to be instrumental for the success of the reaction.     

Understanding the Diels-Alder reactivity of 1,2-azaborine analogues

The Diels-Alder reactivity of 1,2-heteroborines (H₄C₄B(H)X, X?=?NH, PH, AsH; O, S, Se) has been computationally explored by means of Density Functional Theory (DFT) calculations. The influence of the HB?=?X fragment on the reactivity of the system has been quantitatively analyzed in detail by means of the so-called Activation Strain Model (ASM) of reactivity. It is found that the interaction between these species and the dienophile is significantly stronger than that computed for their all-carbon isoelectronic counterpart, benzene. In addition, the strain energy plays a key role in the observed reactivity trends. The role of the aromaticity strength of these heteroarenes on the reactivity is also assessed.