教学课程资源库 更多>>

关键词： 分析化学   教学改革   人才培养  

摘要： 分析化学是化学及其相关专业的主干课或重要基础课程。分析化学既有严密、系统的理论,同时又有很强的实用性,是理论与实际密切结合的学科。为了使不同专业的学生有效掌握分析化学知识,培养学生严谨的科学态度和解决实际问题的能力,本文分析了日常教学中存在的主要问题,如何对分析化学教学进行改革,以期达到培养高素质创新型和应用型人才的教学目标。

关键词： 思维导图   分析化学   学习力   误差与分析数据处理  

摘要： 以分析化学中"误差与分析数据处理"章节的教学为例,探讨了教学中思维导图的设计、课堂应用方法和教学效果评价。思维导图设计环节突出新知识点的衍生、新旧知识点的关系及章节的归纳总结;课堂实践环节强调思维导图在板书上的引导作用,结合多媒体讲解进行教学互补;课后作业环节重视锻炼学生的逻辑思维能力。教学实践结果及问卷调查分析表明,在大学课堂教学引入思维导图是必要的,能系统地增强学生的逻辑思维能力,提高学生的"学习力",调动学生学习的自主性,教学效果令人满意。

关键词： 分析化学   图解法   络合滴定   氧化还原滴定   溶解度  

摘要： 简要阐述了当前分析化学教学中存在的主要问题,提出了利用图解法解决优势分布、络合滴定中终点误差的计算、氧化还原滴定的相关计算、质子平衡式的书写,以及沉淀溶解度的计算等问题的对策。教学实践证明图解法具有概括、简洁和直观的优点,在分析化学教学中是一种行之有效的方法。

关键词： “互联网+”   医学检验技术专业   分析化学   教学模式  

摘要： '互联网+'时代下高职院校传统的教学模式,压抑了学生的主动性,难以适应高职院校培养具有实践能力和创新精神的应用型人才的目标。因此,本文根据职业能力标准的要求和后续课程的需要,以突出应用性和实践性为导向,合理利用各种先进的教学理念和教学手段,以互联网为平台,重点研究线上线下混合式教学模式、网络环境下PBL教学模式、'教、学、做一体化'教学模式在医学检验技术专业《分析化学》课程实践性教学中的应用,以达到提高教学质量和提高学生问题观察能力、思考能力、应用能力、操作能力等的目的。

关键词： 分析化学   教学   树结构设计  

摘要： 科学技术的迅速发展为分析化学带来了新的挑战。分析化学教育应该适应这种需要并做出适当的调整。为了适应经济发展的需要和需求,并结合先进的教学模式,将分析化学在教学过程中的实用性和专业性。本文主要从化学教学改革角度出发,阐述了化学教学改革的模式,论述了化学教学手段和教学方法的改革,叙述了化学分析教学中知识点树结构图设计,讨论了分析化学教学中知识点的树结构实践情况,并从不同角度进行详细分析,从而为分析化学教学中知识点的树结构设计研究提供参考。

关键词： Upper-Division Undergraduate   Analytical Chemistry   Interdisciplinary/Multidisciplinary   Hands-On Learning/Manipulatives   Instrumental Methods   Laboratory Equipment/Apparatus  

摘要： In a university third-year instrumental chemistry laboratory students build a laser based polarimeter for determining light scattering with commercially available optical components used in modern optics research laboratories. During this laboratory experiment, students learn that solutions containing molecules which scatter light also influence the polarization properties of the laser beam by measuring Stokes parameters to calculate the degree of linearly polarized light. They also discover how the polarization properties of a laser beam are affected by half- and quarter-wave plates. Lastly, students are asked to recognize and assess the sources of error associated with the experiment including background intensity, integration time, and polarizer angle accuracy when measuring the Stokes parameters. A majority of students who completed the experiment agreed that this laboratory experiment required more critical thinking than traditional building instrumentation modules that they were exposed to, and that it improved their ability to learn independently and perform research.

关键词： antibodies as receptors   gravimetry   molecular spectroscopy   separation techniques  

摘要： Selected current trends in analytical chemistry are discussed and traced back to original work published more than a hundred years ago in the same field. Gravimetric microanalysis has been transformed into a mass-sensitive sensor technology. New developments in molecular spectroscopy are seen in Raman spectroscopy. In the area of chemical sensors, paper-based devices with visual readout (dipsticks, microfluidic pads) celebrate a revival. In "green" applications, the separation of analytes from complicated matrices is often the key to successful analysis. Continuous separation techniques are essential for the 24/7 production of goods with certified quality. Finally, micro- and nanoscale techniques rely on highly selective receptors, and their development is based on detailed understanding of the structure of ligand-receptor complexes.

关键词： Chemometrics   Data science   Big data   Chemical analytical data   Methodology  

摘要： Efficient and reliable analysis of chemical analytical data is a great challenge due to the increase in data size, variety and velocity. New methodologies, approaches and methods are being proposed not only by chemometrics but also by other data scientific communities to extract relevant information from big datasets and provide their value to different applications. Besides common goal of big data analysis, different perspectives and terms on big data are being discussed in scientific literature and public media. The aim of this comprehensive review is to present common trends in the analysis of chemical analytical data across different data scientific fields together with their data type-specific and generic challenges. Firstly, common data science terms used in different data scientific fields are summarized and discussed. Secondly, systematic methodologies to plan and run big data analysis projects are presented together with their steps. Moreover, different analysis aspects like assessing data quality, selecting data preprocessing strategies, data visualization and model validation are considered in more detail. Finally, an overview of standard and new data analysis methods is provided and their suitability for big analytical chemical datasets shortly discussed. (C) 2018 Elsevier B.V. All rights reserved.

关键词： CVAC   Digital camera   Desktop scanner   ImageJ   Pharmaceutical analysis  

摘要： Two different computer vision-based analytical chemistry (CVAC) methods were developed to quantify iron in the commercial pharmaceutical formulations Ferbisol (R) and Ferro sanol (R). The methods involve using a digital camera or a desktop scanner to capture a digital image of a series of Fe2+ standard solutions and the unknown sample upon reaction with o-phenanthroline. The images are processed with appropriate software (e.g., the public domain programme ImageJ, from NIH) to obtain a numerical value (analytical signal) based on colour intensity. The fact that such a value is proportional to the analyte concentration allows one to construct a calibration graph from the standards and interpolate the value for the sample in order to determine its concentration. The results thus obtained were compared with those provided by a spectrophotometric method and the US Pharmacopoeia's recommended method. The differences never exceeded 2%. The two proposed methods are simple and inexpensive;also, they provide an effective instrumental alternative to spectrophotometric methods which can be especially beneficial in those cases where purchasing and maintaining a spectrophotometer is unaffordable.

关键词： 有效数字   数据记录   数值修约   数据处理  

摘要： 分析化学往往会涉及大量的实验数据,能否对这些原始数据进行正确的记录及运算,关系到实验结果的可靠性及准确度。本文从有效数字的重要性出发,针对教学过程中发现的与有效数字有关的常见问题,进行了深入分析,指出了解决方法,力图帮助学生学习和掌握有效数字的概念、数值修约、运算规则和数据处理能力。