Rachelkeikei
在1856年以前,根本就不存在有机化工业,因为在那之前所有的有机材料都是从纯天然素材中提炼得到的。1856年,一些按计划进行的研究工作并没有获得预想中的结果,这样的情况在以后也时常发生(有时候那引起了其研究问题的巨大进步)。威廉·亨利·珀金曾尝试着人工合成抗疟药物“奎宁”,这本是一种在金鸡纳树皮中发现的天然化合物。本人非化学专业,按自己理解翻的啊
sunhui3650
To Na2WO4. 2H2O and Zn (NO3) 2.6 H2O as raw material, adopting hydrothermal legal system for the ZnWO4 nanocrystalline catalysts. To Shu red B as the goal, studied degradants ZnWO4 catalyst photocatalytic performance, discusses the heat and water temperature, hydrothermal time and hydrothermal solution pH value of crystal morphology and ZnWO4 catalyst photocatalytic activity of the influence law, the result shows: in acidic condition for the preparation of ZnWO4 patchy distribution structure, chain in alkaline conditions for rod structure. In 180 ℃, 24 h preparation conditions, ZnWO4 catalyst shows the highest photocatalytic activity. Hydrothermal solution pH = 5 and pH = 8 preparation of catalysts in 2 to 5 mg/h L within the Shu red B solution determined.the decolored rate achieved respectively 86% and 95%. During the preparation of solution of pH value, the catalyst of amorphous and specific surface area is the effect of catalyst activeness of important factor.
chetcn0948
1. The master chemical engineering, chemical technology, applied chemistry subjects such as basic theory, basic knowledge, 2. Master chemical plant technology and equipment design method, grasps the chemical process simulation optimization method; 3. Has to new products, new technology, new technology and new equipment research, development and design of the preliminary ability; 4. Familiar with countries to chemical production, design, research, development and environmental protection policy and rules and regulations. 5. Understand chemical engineering theory front, to understand new technology, new technology and new equipment development dynamic; 6. Master document retrieval, information query basic method, has the certain scientific research and practical work ability; 7. Has innovation consciousness and independent acquire new knowledge ability; 8. Familiar with gas chromatography, liquid chromatography, infrared spectrometer, ultraviolet spectrometer and the use of the instrument; 9. Able to skillfully use office software, has the use of VFP, turbo PASCAL programming software such as compiling simple program ability; 10. Familiar with autoCAD software chemical mechanical drawing.
cool100886
我是化学专业的英文翻译如下:1、I major in Chemistry.2、My major is chemistry.3、I'm a student in Chemistry.以上几种说法都可以。
S~夏末微凉
化学专业是一种大学专业。化学专业培养具备化学的基础知识、基本理论和基本技能,能在化学及与化学相关的科学技术和其它领域从事科研、教学技术及相关管理工作的高级专门人才。