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chemical history
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  化学史
     Based on chemical history,the origin and development of C 1chemistry are studied in this paper.
     本文从化学史的角度考证C1化学的起源和发展;
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     The Application Research of the Chemical History Education in Chemical Teaching
     化学史教育在化学教学中的应用研究
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     About Significance and Effect of Chemical History in Organic-Chemistry Teaching
     浅谈化学史在有机化学教学中的意义和作用
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     School-based Curriculum Development in High School on the Basis of Chemical History Education
     基于化学史教育的高中校本课程开发
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     Try to Discuss The Education of Chemical History In Analysis Chemistry Teaching
     试论分析化学教学中进行化学史教育
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  “chemical history”译为未确定词的双语例句
     The scope of chemical history include chemical element to discover history, chemical development history, chemical domestic life story, chemical educational history, chemical ideological history and chemical knowledge history.
     化学元素发现史、化学发展史、化学家生平、化学教育史、化学思想史、化学认识史。
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  相似匹配句对
     History and Logic of Chemical Engineering
     化学工程学的历史演变与逻辑行程
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     History
     历史(英文)
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     Is the chemical history in chemical textbook sufficiency?
     中学化学教科书中化学史内容体现的是否充分?
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     The History of the Minoans
     克里特人的历史(英文)
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     Chemical Sensors
     化学量传感器
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  chemical history
Thermoanalytical techniques (TG, DTG, DTA and EGA) can be helpful in studying gel compositions and relating the chemical history and the role of the precipitant to the chemical properties of gels.
      
the rate of leaching of the particles is particularly sensitive to their "chemical history".
      
Because active sedimentation occurs mostly in the deep water areas of the lake, the sediment remains undisturbed and contains a record of the chemical history of the lake.
      
By movements taking place along this fault two durbachite blocks, each with a different physical-chemical history of consolidation, came into contact.
      
Interaction of X-ray Amorphous Aluminum Oxide with Lithium Carbonate: Effect of the Chemical History of Aluminum Oxide
      
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During the past decade, molecular astronomy has greatly contributed to our knowledge of the structure of the Galaxy, chemical history of galaxy, mass loss from stars and molecular clouds and thus has led to a better understanding of the above mentioned subjects.Summarizing briefly the different objects, this review concentrates on physical pro-perlies of molecular clouds, which concerns the formation of stars.The review consists of four sections which deal with1. The reseach objects of molecular astronomy,2....

During the past decade, molecular astronomy has greatly contributed to our knowledge of the structure of the Galaxy, chemical history of galaxy, mass loss from stars and molecular clouds and thus has led to a better understanding of the above mentioned subjects.Summarizing briefly the different objects, this review concentrates on physical pro-perlies of molecular clouds, which concerns the formation of stars.The review consists of four sections which deal with1. The reseach objects of molecular astronomy,2. Derivation of the parameters of molecular clouds,3. Observational results of molecular clouds,4. Theoretical problems of molecular clouds.

十余年来年轻的分子天文学带来一系列新发现,推动了银河系结构、星系化学史、恒星物质流失、分子云物理等课题研究的新进展。 本文在简介分子天文学之后,将集中对与恒星形成有关的分子云物理问题进行综述。 内容分为 一、分子天文学的研究对象 二、分子云物理参数的导出 三、分子云的观测 四、涉及恒星形成的分子云理论研究

The purpose of this article is to inquire into the significance of the education of chemical history to students in teaching the means and effect it causes. Besides it will be discussed with facts.

本文旨在探讨在化学教学中对学生进行化学史教育的意义、形式及产生的效应.并用事实加以论证.

In this paper, the component, crystal structure, molecular network structure, degree of broken bond, radial distribution function, Si-O bond length and Si-O-Si bond angles of glasses phases in the magmatic inclusion of vocanic rock and ultrabasic rock, pearlite, obsidian, heat-insulating fible of SiO_2, Zr-Al-Si series refractory materials and synthetical silicate have been studied by electron probe, laser Raman molecular microprobe, X-ray diffractometer and high tempereture and high pressure experiment erc....

In this paper, the component, crystal structure, molecular network structure, degree of broken bond, radial distribution function, Si-O bond length and Si-O-Si bond angles of glasses phases in the magmatic inclusion of vocanic rock and ultrabasic rock, pearlite, obsidian, heat-insulating fible of SiO_2, Zr-Al-Si series refractory materials and synthetical silicate have been studied by electron probe, laser Raman molecular microprobe, X-ray diffractometer and high tempereture and high pressure experiment erc. Then obtained conclusions as follows: 1. No matter what glasses phases of geological body or silicates glasses phases in industry material, the molecular network structure is consisted of six models. They are Monomer[SiO_4], Dimer [Si_2O_7], Ring and Chain [SiO_3], Sheet [Si_2O_5], Frame network [AlSi_3O_3] and pure frame network [SiO_2]. 2. The Raman microprobe method measuring glasses network types and degree of broken bond in 1μm~2 glasses have been set up. Therefore this paper put forward new theoretical models and studying method for disputing noncrystal glasses network structure realm on world. 3. The character of magmatic inclusions in chromite-bearing ultrabasic rock body have been studied and discovered that: Intensively crystallized & half crystallized magmatic glasses inclusion are albitic glass and composed chiefly of sheet and frame networks with a few chain network. They formed at the early stage of the chrome-spinel crystallization. Slightly crystallized magmatic glasses inclusion is chloritic glass and consist mainly of sheet & chain networks and secondly of frame network. It formed at the late stage of the chrome-spinel crystallization. Obviously, a study of molecular network structure in glasses phases is conducive to reappear physical-chemical history of natural magmatic crystallization and development. This has important significance for inverstigating forming-ore conditions and enhancing performance of industry silicate materials.

采用电子探针、拉曼探针、x衍射和高温高压试验等手段对火山岩和超基性岩岩浆包裹体、珍珠岩、黑曜岩、绝热SiO_2纤维、锆铝硅耐火材料和人工合成硅酸盐中玻璃相的成分、分子网络结构、断键程度,径向分布函数、Si-O键长和Si-O-Si键角等进行了系统研究并获得下列结论: 1)无论是地质体玻璃相还是工业硅酸盐玻璃相,其分子网络结构都是由单体[SiO_4]、二聚体[Si_2O_7]、环与链[SiO_3]、层[Si_2O_5]、架[Al Si_3O_8]和纯架状[SiO_2]6种网络单元所组成。 2)建立了在1μm~2范围内测量玻璃相网络类型和断键程度的拉曼微探针法。对国际上有争议的非晶玻相网络结构理论提出了新的模式和研究方法。 3)对含铬超基性岩岩浆包裹体的研究发现,强结晶化和半结晶化的岩浆玻璃包裹体是钠长石质玻璃相,以层状和架状网络为主,对应于铬尖晶石结晶的早期,而弱结晶化的岩浆玻璃包裹体是绿泥石质玻璃相,以层状和链状网络为主,架状网络为次,形成于铬尖晶石结晶的晚期。显而易见,对玻璃相分子网络结构的研究有助于重溯天然岩浆结晶和演化的物理化学历史,对研究矿藏的生成条件和提高工业硅酸盐材料的性能具有重要的意义。

 
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