"地小氢"和"月小氢"

Hydrogen is the most abundant chemical element in the Universe and is tightly related to human life. This article personifies hydrogen, bringing a close interaction between the hydrogen on the moon and the hydrogen on the Earth. Through lively and interesting dialogues, the history of hydrogen discovery and the properties are introduced, and the application of hydrogen in different aspects of the future is prospected.     

"实验"是高三化学复习的"活化剂"

本文阐述了高三化学复习中实验的重要性,指出“实验”是高三化学复习的催化剂,并从不同方面探讨了高三化学复习中用好“实验”这一催化剂的具体措施。     

"PBL"教学法在"有机合成"教学中的运用

为突破传统教学模式,提高有机化学教学质量,本文尝试在“有机化学”课程的“有机合成”部分采用“PBL”教学法模式,取得了较好的效果。“PBL”教学法是以问题为基础的教学方法,它能拓展知识面,联系不同学科中的相关知识点,加强了学生学习的主动性,训练了学生的思维能力,让知识永久的存储于学生的记忆中,使教学处于融洽的氛围中。     

"问题米"、"问题面"

近闻广东、广西、海南等南方城市先后发现“问题米”、“问题面”而引起食物中毒的事件。其中广东省卫生、公安、工商等部门联合采取行动,查“问题米”近百吨;广西玉林5所学校因食用“问题面”一次中毒竟达400余名学生。就此卫生部立即通告全国,要求各地对辖区的大米、麦面生产经营单位进行     

仪器信息网"耗材"和"配件"栏目全新上线

仪器信息网”耗材”和”配件”栏目在紧锣密鼓的筹备工作之后,终于全新上线,这2个栏目汇聚了国内外近600家仪器常用配件耗材生产商和供应商信息以及50万条产品信息．如实验过程中常用的色谱柱、氘灯、传感器等仪器零配件;玻璃器皿、化学试剂和标准物品等实验耗材,都可以在这2个栏目中找到并询价．     

"О ГАЗИФИКАЦИИ КАМЕННЫХ УГЛЕЙ КНР"

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都是"经验"惹的"祸"

经验是经历与体验,成功的经验给人帮助,找到捷径,从而事半功倍。但有时我们得来的经验没有经过检验,是片面的、与实践不符或在理论上就是错误的,如果把这些自己所谓的经验不注意条件要求随意使用,当作普遍适用的规律,甚至当作定理、原理来运用,往往就会出现问题了。1想当然得出     

原子量之"变"

原子量是最为基础的科学概念之一,"国际纯粹与应用化学联合会(IUPAC)"之"同位素丰度和原子量委员会(CIAAW)"每两年会修订并发布一次原子量。自2009年起,IUPAC宣布某些元素的原子量不再是常数,这些元素的标准原子量为区间值。为方便使用,对于这些元素,给出一个合理的单一数值,称为常规原子量。何为标准原子量?何为常规原子量?为何某些元素的原子量出现区间值?依据原子量数值的特性,元素可以分为几大类?本文在介绍最新元素周期表中原子量的特点之后,简述原子量测定、标准确定、概念演变的发展历史,讨论原子量的修订与变化等问题。     

有机化学与实验课程在线“双练教学”模式的探索与实践

In the online organic chemistry and laboratory courses, the open or semi open quizzes before class and after class are adopted to explore the "dual quizzes teaching" mode on the network teaching platform. As the progress of "dual quizzes teaching", students' learning weakness, confidence and enthusiasm are improved continuously. Through the analysis of online students' learning data, questionnaire and interactive feedback, the teachers can evaluate the learning situation of the students and regulate instructional content in time. As a result of teaching online, the "dual quizzes teaching" mode has achieved highly positive effect.     

“线上线下-虚实结合”在有机化学实验教学中的应用探索——以正溴丁烷的制备实验为例

In response to the impact of the Covid-19 epidemic on organic chemistry laboratory teaching, this article analyzes and discusses the current limitation of traditional organic chemistry laboratory teaching. Taking the "preparation of n-bromobutane" as an example, a new "online-offline and virtual-actual combination" teaching mode with the combination of "Tencent Meeting, MLabs, laboratory and WeChat group" is introduced. The practice of the new mode of teaching includes the following steps: pre-class online guiding by teacher, student preview and practice based on the virtual simulation platform, students and teacher discussion and operation in laboratory, and post-classcomprehensive assessment and Q&A", and good teaching effects have been received. It is significant in cultivating and improving the independent innovation and practical ability, and provides reference for the organic chemistry laboratory teaching reform and also lays a foundation for the construction of "outstanding course" of organic chemistry.     

基于二维MOFs构建MicroRNA荧光传感器的综合分析化学实验及"赛学结合、三位一体评价"的教学模式设计

本综合性实验将二维金属有机框架(2D MOFs)和MicroRNA (miRNA)分析等前沿研究领域引入化学(材料)本科和研究生实验教学中。主要包括2DMOFs材料的合成及表征、基于2DMOFs的荧光核酸探针构建以及将探针用于miRNA荧光分析等,共10个学时。所需掌握的实验技能包含溶剂热法、离心分散和外标法等基本材料合成和分析化学操作以及荧光、红外、X射线粉末衍射等材料表征和分析方法。我们在实验中实施了一种新型的"赛学结合、三位一体评价"教学模式。在该模式中,学生分组开展团队作业、实验和汇报,不仅要记录实验现象和结果,还需对实验过程录像并总结做成PPT。各组间通过"PPT答辩、实验报告和录像"等进行比赛,三位一体决出成绩。学生在实验中不仅学习了大量实验技能,提高了动手能力,拓展了学术视野;而且通过比赛和教学相结合,激发了你追我赶的学习热情,培养了团队合作精神,调动了学习的主观能动性。该实验和教学模式也适合推广至其他综合化学实验教学中。     

大类培养模式下非化学化工专业有机化学教学改革

针对非化学化工专业学生在学习有机化学时出现的"有机化学无用论、乏味论和繁难论"等现象,对有机化学课程教学的各个环节(包括绪论设置、新课导入、课堂教学内容编排、教学手段、考核方式)进行改革探索,旨在为"促进非化学化工专业有机化学教学改革,提高学生学习效率"提供相应的研究思路和方法.     

面向化学专业的催化化学教学的探索与实践

Catalytic chemistry is a subject with strong requirements for comprehension and application, which has overlap and interconnection with several subjects such as inorganic chemistry, organic chemistry and physical chemistry. To promote the students' enthusiasm in learning and improve their professionalism, we put forward to construct subject-oriented knowledge system and design student-centered teaching mode. The aim is to stimulate the study enthusiasm among the students and to endow students with creative- and analytical-thinking. The distinct teaching feature is the combination of theory and practice.     

基于案例教学法的物理化学课程教学改革探索与实践

Case teaching method is adopted to reform physical chemistry teaching to mobilize students' learning enthusiasm, activate classroom atmosphere and help students to understand nonfigurative and difficult basic concepts and principles. Theory is combined with practice, and a lot of cases from daily life, industrial and agricultural production together with scientific research are introduced into the whole teaching process of physical chemistry. Thus, the teaching effect is greatly improved.     

大学有机化学选论课程的教学改革探索

有机化学选论课程是有机化学专业必修课的深入与延伸,既要满足学生对日新月异的现代有机化学知识的需求,又要兼顾知识的系统性,需要在教学实践中不断探索。本文以创新教学素材、使教学与现代科研以及社会工艺相结合为出发点,探讨如何以学生为主体,培养学生的科学素养,提高学生自主学习能力的教学改革探索。     

新冠肺炎潜在药物作为案例在杂环化学课程教学中的实践

The coronavirus COVID-19 pandemic is the defining global health crisis, and potential drugs have attracted widespread attentions. The authors attempted to use the known potential drugs as teaching cases throughout the whole teaching process of heterocyclic chemistry. Under the special pandemic situation, the authors also focused on exploring and utilizing the ideological and political education cases that were related to pandemic as well as potential drugs of COVID-19. The ultimate purpose was to strengthen the effects on both knowledge teaching and value guiding, and thus improve the curriculum system construction. The reform of heterocyclic chemistry classroom teaching via case methods could build a bridge between "theoretical knowledge-heterocyclic chemistry" and "real world-drug application", which effectively aroused students' enthusiasm as well as initiative for learning, and thus significantly improved the teaching effects.     

物理化学课程在线教学实践与效果分析

The main measures and experiences of online physical chemistry teaching through Ding Talk platform in Bohai University was introduced. Through the practice of the whole semester, it can be seen that the modular teaching mode of "simplicity-detail-induction" constructed by physical chemistry teaching team is conducive to match students with different self-learning abilities with different levels of teaching. The question-and-answer video induction class can fully arouse students' learning enthusiasm, which is favorable for the perfect realization of teaching and teacher-student interaction. With the double guarantee of meticulous and transparent teaching management and the accompanying process assessment, the overall goal achievement degree of the whole semester reached beyond 80%, and the sub-goal achievement degree reached over 60%, which provided reference for relevant teaching.     

构建 “三三三”混合式课堂教学新模式*——以“原子结构”类比模型的建构为例(Ⅱ)

根据优化的无机化学“原子结构”教学设计,运用一系列直观具体的原子结构类比模型,开展了“三三三”混合式课堂教学改革。通过比较改革前后的教学效果及问卷调查结果,发现试点班学生的主动性、积极性和参与性有明显提高,教学改革达到了预期效果。结果表明,在课堂中渗透类比思维,是帮助学生理解抽象概念和理论的有效方法。