共查询到20条相似文献,搜索用时 437 毫秒
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基于师范生专业能力提升和"化学教学论实验"教学存在对学生实验研究能力、创新能力和教学能力培养不足的现状,实施教学变革研究。通过开展以疑难实验为主题的研究性设计和实验教学活动,提升学生教学研究意识和能力,并在实践中全面提升师范生专业能力。 相似文献
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主要介绍厦门大学为"化学拔尖计划"学生培养"量身定做"的"强化实验"课程平台——"基础化学实验一强化实验"课程的设计、实践和教学体会。 相似文献
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设计并实施"硫酸"教学,让学生通过对比实验主动探索浓、稀硫酸性质的异同,归纳总结浓硫酸具有的特殊性质。实验过程中学生提出了有价值的生成问题"为什么向蔗糖中加水",面对课堂预设之外的生成问题,尝试让学生通过实验来寻求答案。本堂课存在2方面的困惑:(1)关于教学设计与学科思想;(2)关于生成问题的生成与解决。为了很好地解决教学中的困惑,将课堂录像和部分教学实录与同事进行讨论交流,最后对教学给出了合理的建议,解决了困惑。这一解决困惑的方法,有利于青年教师的快速成长,同时是一种新型的教学反思。 相似文献
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探讨"实验化学"教学的有效性,合理组织教学,合理取舍实验内容,改进实验流程,适当安排连堂课,开放实验室,积极开发化学实验教学资源,进行研究性学习。 相似文献
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在"高等物理化学"课程教学中引入实例教学可以有效帮助学生在理论语言与实验语言之间搭建桥梁,借助计算机"可视化"手段向学生展示实体实验难以描述的抽象概念。本课程从量子力学和分子力学出发,设计了由浅入深的7个实例,用计算机模拟方法分别计算了单分子的分子光谱、化学反应路径和溶液的微观异质性,帮助学生从微观层面形象化地理解抽象的物理概念,有效克服了学生的畏难心理,显著提高了学生解决实际问题的能力,改善了理论脱离实践的现状。 相似文献
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Dr. Lan Hui Prof. Yurui Xue Huidi Yu Chao Zhang Prof. Bolong Huang Prof. Yuliang Li 《Chemphyschem》2020,21(19):2145-2149
Graphdiyne, as a magical support, can anchor zero valence metal atoms, providing us with an opportunity to develop emerging catalysts with the maximized active sites and selectivity. Herein we report high-performance atom catalysts (ACs), Cu0/GDY, by anchoring Cu atoms on graphdiyne (GDY) for hydrogen evolution reaction (HER). The activity and selectivity of this catalyst are obviously superior to that of commercial 20 wt.% Pt/C, and the turnover frequency of 30.52 s−1 is 18 times larger than 20 wt.% Pt/C. Density functional theory (DFT) calculations demonstrate that the strong p-d coupling induced charge compensation leads to the zero valence state of the atomic-scaled transition metal catalyst. Our results show the strong advantages of graphdiyne-anchored metal atom catalysts in the field of electrochemical catalysis and opens up a new direction in the field of electrocatalysis. 相似文献
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通过田间中区莲子栽培实验及分析表明,加施高技术产品多元络合微量植物营养素,显著增加了莲子的营养元素含量。其钙、锌、铜,铁含量分别比普通莲子高23.8%、92.9%、109.1%、9.3%,而这几种元素正是目前儿童、孕犋 最缺乏的营养元素,该产品的问世为儿童孕妇、老年人带来福音。 相似文献
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《中国化学》2018,36(1):31-36
Using CuSO4 as the copper source, nanostructured copper with four different morphologies was obtained by electrodeposition method on FTO substrates. The as‐synthesized Cu/FTO samples were characterized by X‐ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), Raman, X‐ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDS), and transmission electron microscopy (TEM). The effects of electrodeposition potential and electrodeposition time on the Cu/FTO samples and the photocatalytic performance were investigated systematically. The results showed that the Cu/FTO samples were well‐crystallized and the morphologies could be changed from nanoslices to nanodendrites structure with the negative shift of the depositing potential. The electrodeposition potential and time have a significant effect on the amount of H2 evolution. The obtained Cu nanospheres which were prepared at the potential of −0.65 V for 600 s showed the best photocatalytic behavior. The mechanisms for the photocatalytic activities were also discussed. 相似文献
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MIAO Jun 《高等学校化学学报》1999,20(Z1):573
Copper ions play a key role in Industry, Agriculture,National Defense and Scientific Research. The flash furnace copper cooling jackets manufactured by our yard require perfect inside quality,content of copper reaches 99.6-99.9 percent. An accurate and rapid method of determining copper content is needed for large bulk production. 相似文献
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根据铜锍的组成结构特点,建立了一种测定铜锍中铜含量的方法,重点讨论了混合酸对铜锍进行溶解的前处理及样品滴定过程。方法铜的测定范围:4.80%~32.00%,回收率:97.70%~101.26%,精密度即标准偏差:0.026 %~0.10%。该方法能够较好地解决铜锍中铜含量测定难的问题。 相似文献