微课辅助任务驱动式仪器分析翻转课堂的实践运用

针对仪器分析课程教学目前积累的几点重大问题,积极整合教学资源,依托“一平台、两区域、五模块”建设了微课辅助任务驱动式翻转课堂,旨在打造高校仪器分析“金课”、淘汰“水课”,提升教学和学习质量;该教学模式在我校近几年疫情形势下开展的线上线下融合教学实践中取得了良好效果,提升了高校教师的教学能力,培养了学生良好的学习习惯和科研精神,对新时代高校教师队伍建设和仪器分析综合性人才的输出具有重要意义。     

化学教研成果转化的理论与实践

化学教研成果转化到教学中对提高化学教学质量具有至关重要的作用。构建“教学、教研、成果转化与评价”的循环体系,可保证化学教研成果的有效转化。教学研究成果转化的实践途径有多种,就高师院校化学课程与教学论教师而言,主要有：(1)在理论课教学中转化,优化教学理念;(2)在实验课教学中转化,更新实验内容;(3)在指导第二课堂活动中转化,培养动手能力;(4)在指导教育实习中转化,丰富实习资源;(5)在指导毕业论文中转化,提高创新能力;(6)在考核学习成绩中转化,完善评价手段;(7)在为基础教育服务中转化,引领中学化学教学;(8)在对外交流中转化,展现学校风采。     

基于"产学研用"背景下的仪器分析课程教学机制研究

"产学研用"是高等教育实现人才培养目标的重要途径。本文在"产学研用"教学一体化背景下,为提高仪器分析课程教学效果,强化课程对学生专业能力、科研能力和解决企业实际问题的能力培养,在分析目前课程教学存在问题的基础上,对仪器分析"产学研用"教学机制、教学方法、资源共享平台建设、教学团队建设、教学考核等问题进行一体化建设探索,以期通过"产学研用"教学建设促进人才培养质量进一步提升,并对高校培养人才与企业实际需求人才的有效衔接问题提供一定的解决思路。     

2002年中国机械工程学会年会理化检验分会场暨中国机械工程学会理化检验分会成立40年学术会议征文通知

20 0 2年度中国机械工程学会年会定于 2 0 0 2年11月 1～ 5日在北京国际会议中心召开 ,中国机械工程学会理化检验分会 (分会场 )主持的“中国机械工程学会理化检验分会成立 4 0年学术会议”是构成2 0 0 2年度中国机械工程学会年会活动主体的重要内容之一。热诚邀请广大会员和从事理化检验工作的科技与管理工作者踊跃参加、积极赐稿。一、征文内容(1)理化检测技术及方法的发展方向、理化检测方法标准化动态的综述报告 ;(2 )理化检测的新技术、新方法和新仪器介绍 ;(3)废品分析与失效分析技术 ;(4)测量不确定度的估算及应用 ;(5 )理化检测技术…     

二元二模块立体教学:打破时间和空间壁垒的实验教学新模式

首都师范大学化学系实验教学中心通过移动公众平台的开发、建设和在实验教学中的应用,力求实现以下突破:(1)逐步完善传统教学和自主学习相结合的二元课程结构,夯实基本知识和基本技能“双基训练”,大胆开放学生设计和实施实验的自主性,分实验前、中、后3个模块引导学生科学思维的形成和训练;(2)建立课上课下及线上线下充分互动的立体教学形式,综合采用多种教学技术和互动手段,打破实验室所限“空间壁垒”,打破实验课时所限“时间壁垒”;(3)利用多种技术手段对教育学数据进行分层次的收集和分析,为实验教学改革提供现实依据.     

大型仪器科学管理(204~208)从管理学角度看生命科学机构的仪器平台管理

当前, 生命科学机构的仪器平台管理均以经验为主, 在实际管理过程中产生了一些问题, 需要从管理学角度进行分析和解决.首先借鉴互联网平台的概念, 对仪器平台的组织构架进行分析, 再对仪器平台与科研团队的关系进行经济学分析, 指出生命科学学科思维框架下, 仪器平台工作人员需要了解管理活动自身的特点, 最后建议在研究机构的组织构架中给予仪器平台独立并与科研团队平行的定位.同时, 提出仪器使用价格应采取浮动机制, 仪器平台工作人员和管理者的培养、选择必须以提高管理能力为出发点, 并给出相关措施.     

谈化学基本概念教学与逻辑学知识的运用

本文试以初中化学中电解质概念的教学为例,探讨运用逻辑学知识组织教学过程,帮助学生理解概念,发展学生逻辑思维能力的具体做法,即(1)“吃透教材”,了解学生,掌握概念系统的逻辑结构;(2)提供丰富的感性材料,引入概念,(3)透过现象看本质,形成概念;(4)理解内涵和外延,明确概念;(5)提供变式练习,使概念精确化。     

运用文本分析法对比研究新旧人教版教材“反应热”内容

从课标、概念组织结构、教学资料对新旧人教版选修“反应热”内容进行对比分析,研究发现:(1)新课标在内容上更加强调“反应热”概念的学科理解,渗透变化观与守恒观等基本观念,突出学习素材的重要性;(2)新教材在内容组织上厘清了“反应热”“焓变”“能量转化”等核心概念之间的关系,重视对“反应热”内容的结构化认识;(3)新教材在图片、实验、习题增强了情境性与科学性。建议教师在教学中增进对“反应热”的学科理解,运用概念构图策略促进学生知识结构化,创设真实情境提高学生的问题解决能力,培养化学学科核心素养。     

再谈教育实习改革思考——发展性教育实习模式的建构与实践

教育实习是教师职前教育的一个重要学习环节。教育实习对教师的职业养成与发展会产生深刻的影响。教育实习伴随教师教育改革不断地充实、完善和发展,同时促进教师教育、基础教育的改革与发展。针对综合性大学教师教育“3+1”培养模式,建构了发展性教育实习模式并进行了实践,并分析了这一模式的价值体现。     

仪器信息网推出:防治“非典”仪器网上专场展示

www .instrument.com .cn“非典”———一场突如其来的灾难 ,面对“非典” :我国政府和社会近期的工作重点是 :加强防治 ,控制疲情蔓延 ,同时全力投入到防治“非典”的科技攻关战役。作为中国科学仪器的门户网站 ,仪器信息网一直致力于为广大仪器用户和仪器厂商提供专业化的信息服务。因此 ,仪器信息网 (www .instrument.com .cn)近期的工作重点是 :让医疗及科研工作者及时获得有关仪器装备的有用信息 ;让更多的仪器厂商积极地参与到抗击非典的战役中来 ;并向社会各界及时传递最新的检测技术和仪器进展信息 ;为快速战胜非典作出我们应作的…     

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.     

"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.     

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".     

"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.     

"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.     

"Decoking" of a "coked" zeolite catalyst in a glow discharge

'Decoking' of a 'coked' zeolite catalyst in a glow discharge in oxygen is investigated. The 'decoking' process involves reactions of atomic oxygen (O atoms) with 'coke' and yields gases such as CO, CO₂ as well as other gaseous products that could be easily pumped out.Three different modes of discharge were investigated including a static mode, a flowing-gas mode, and a periodic-purge mode where the oxygen and other gaseous products of the discharge were replaced by fresh O₂ gas after short but regular intervals of time. In some cases, additional heating was also used to provide base temperatures of the order of 100 °C to facilitate penetration of oxygen atoms into the inner layers and cages of the zeolite catalyst.This paper presents some results of spectroscopic analytical techniques used to monitor the atomization of oxygen, oxidation of 'coke', and to confirm the process of 'decoking'. More specifically, radiation emission on the 3 s ⁵S– 3p ⁵P transitions of O around 777.2–777.5 nm were selected for monitoring the atomization of O₂. On the other hand, X-ray photo-electron spectroscopy (XPS) was used to determine the amount of residual carbon and extent of 'decoking'. Furthermore, evolution of CO and CO₂ gases as a function of time was systematically monitored in real time. For CO, the 451.1 nm band head belonging to the B¹ - A¹ bands of the Angstrom system of the CO spectrum was used, while for CO₂, the band head at 353.4 nm belonging to the CO₂⁺ spectrum was used. The rates of evolution of CO and CO₂ were related to the rate of 'decoking' of the catalyst. It is noted that in the periodic-purge mode, about 63% of the total yield of CO from a given sample of the catalyst appears in the first 3-min exposure to discharge whereas it takes up to 15 min to remove nearly 94% of the removable carbon under our experimental conditions.