共查询到20条相似文献,搜索用时 93 毫秒
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阐述了二氧化硫性质演示实验的改进方法,从实验的设计意图、实验装置的准备、实验的具体操作与实验现象、实验过程中应注意的事项等方面将自己的经验及做法作了一个完整的介绍. 相似文献
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指出了目前化学实验论文及实验教科书中“实验用品”表述中存在的没有“实验用品”表述,表述时仪器、试剂、材料、试样不加区分和缺少主要仪器与试剂的问题,分析了问题原因,提出了改进建议,旨在为完善实验论文及实验教科书提供参考。 相似文献
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介绍了几则有关电化学实验的改进与创新.其中包括盐桥的改进、简易原电池装置的设计、简易氢氧燃料电池的制作、铁的吸氧腐蚀实验的改进与创新、牺牲阳极的阴极保护法实验的改进等内容,并详细介绍了其中的实验方法、效果及设计理由. 相似文献
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梳理了部分国内综合性院校本科化学类实验的课程设置及所用化学实验教材,同时简单介绍了科学仪器的分类。针对各类化学实验教材中分析仪器部分的内容重复、更新不及时、深度不够等问题,提出了解决方案,希望能对今后化学实验教材的编写提供不同的视角和有益的借鉴。 相似文献
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以大学化学系新生为实验对象,以分析天平为实验材料,对化学实验操作技能的遗忘进程进行了实验研究,讨论了化学实验操作技能遗忘曲线理论,对实验结果进行了探讨,提出了改进化学实验教学,提高学习质量的看法和建议,从而补充了动作操作遗忘进程在化学实验操作技能中的遗忘规律。 相似文献
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Hexa-Coordinate phosphorus Chemistry and Life Chemistry 总被引:1,自引:0,他引:1
ZHAO Yu-Fen YIN Yin-Wu LI Yan-Mei TAM Bo Department of Chemistry Tsinghua University Beijing 《有机化学》1993,(2)
The amino acids' side chains were acting as the relay device to regulate the chemical reactivi-ties of the N-phosphoryl amino acids. These modulation effects were performed through the partici-pation of the phosphoryl group. 相似文献
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绿色化学是从根本上消除环境污染的必由之路。由于某些传统农药是引起环境污染的一个重要因素,因而对农药化学中的绿色化学进行研究和推广具有非常重要的意义。本文应用绿色化学原理,对农药化学中的一些绿色化学方法和技术作了简单介绍。 相似文献
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Earl L. Muetterties 《Journal of organometallic chemistry》1980,200(1):177-190
Metal cluster chemistry is one of the most rapidly developing areas of inorganic and organometallic chemistry. Prior to 1960 only a few metal clusters were well characterized. However, shortly after the early development of boron cluster chemistry, the field of metal cluster chemistry began to grow at a very rapid rate and a structural and a qualitative theoretical understanding of clusters came quickly. Analyzed here is the chemistry and the general significance of clusters with particular emphasis on the cluster research within my group. The importance of coordinately unsaturated, very reactive metal clusters is the major subject of discussion. 相似文献
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S. A. Giller A. V. Eremeev V. A. Kholodnikov É. É. Liepin'sh 《Chemistry of Heterocyclic Compounds》1975,11(9):1055-1058
Products of addition to both primary and secondary amino groups were obtained by reaction of 2-aminomethylethyleneimine with some acrylic acid derivatives. The structures of the compounds obtained were proved by means of their IR and PMR spectra and also by their subsequent chemical transformations.See [1] for communication X.Deceased.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1212–1216, September, 1975. 相似文献
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L. G. Yudin A. N. Kost E. Ya. Zinchenko A. G. Zhigulin 《Chemistry of Heterocyclic Compounds》1974,10(8):930-936
The nitration of indoles containing donor substituents in the 5- and 7-positions in strongly acidic media involves the protonated form and gives primarily compounds with a nitro group in the 6-position. The structures of the products were proved by PMR, UV, and mass spectrometry. 相似文献
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The reform and innovation of the chemistry textbooks for applied chemistry students by Jinling College of Nanjing University were introduced. A series of textbooks for both theoretical and laboratory courses with focus on training the problem-solving capacity of students are developed. The reform and composition of textbooks help the development of young teachers and improvement of the teaching pedagogy and contents. 相似文献
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Summary The cis and trans modifications of 7-oxabicyclo[4.2.0]octane were prepared. The structures of both isomers were proved on the basis of infrared spectrum investigations and of derivatives obtained as a result of ring opening under the action of p-toluenesulfonic acid. 相似文献