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根据微课在现代教学改革的现状,介绍了微课在称量实验中的作用。通过结合化学称量实验的内容,分析了微课教学与传统教学的区别,得到微课在称量实验中具有教学内容易于掌握、学生学习更加容易和方便、针对性强、内容模块化、形式灵活多样等作用。微课在称量实验中可以继续改革。微课在称量实验中的经验可以应用到其它实验教学改革。 相似文献
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化学微课和慕课网络课程的建设探究 总被引:2,自引:0,他引:2
《化工设计通讯》2017,(5):146-147
首先梳理了化学移动学习、微课程、慕课和网络教育的相关理论和概念,深化对化学移动学习和微课程的理解。其次总结了微课和慕课教学资源的建设情况,再结合现有微课程的存在问题以及微课翻转课堂的形式和要点分析,提出当今微课、慕课等网络课程资源教学的反思总结。 相似文献
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基础化学是高等医学院校为实现医学类专业人才的培养目标而开设的一门基础知识课程,主要是为了满足学生对于基础化学知识的学习需求。通过对这门课程的学习能够让学生加大对化学基础知识的了解,掌握其基本的化学原理及应用,了解其发展动向,为后期医学类知识的学习奠定基础。本文以西部高等医学院校基础化学课程教学为例,就如何加强课程教学改革,提高教学质量进行了分析,并提出教学改革建议和措施。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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利用组件技术开发化工原理实验课件,给出了系统层、组件库层和应用层的架构划分。重点讨论了组件库的设计,给出了流体阻力这一典型实验的实现描述。实践证实,基于组件技术可以提高仿真实验的开发效率。 相似文献