应用化学专业英语翻译Research-and-Development
Unit 2 Research and Development研究和开发Research and development, or R&D as it is commonly referred to, is an activity which is carried out by all sectors of manufacturing industry but its extent varies considerably, as we will see shortly. Let us first understand, or at least get a feel for, what the terms mean. Although the distinction between research and development is not always clear-cut, and there is often considerable overlap, we will attempt to separate them. In simple terms research can be thought of as the activity which produces new ideas and knowledge whereas development is putting those ideas into practice as new process and products. To illustrate this with an example, predicting the structure of a new molecule which would have a specific biological activity and synthesizing it could be seen as research whereas testing it and developing it to the point where it could be marketed as a new drug could be described as the development part.研究和开发，或通常所称R&D是制造业各个部门都要进行的一项活动。
我们马上可以看到，它的内容变化很大。
我们首先了解或先感觉一下这个词的含义。
尽管研究和开发的定义总是分得不很清楚，而且有许多重叠的部分，我们还是要试着把它们区分开来。
简单说来，研究是产生新思想和新知识的活动，而开发则是把这些思想贯彻到实践中得到新工艺和新产品的行为。
可以用一个例子来描述这一点，预测一个有特殊生物活性的分子结构并合成它可以看成是研究而测试它并把它发展到可以作为一种新药推向市场这一阶段则看作开发部分。
1.Fundamental Research and Applied ResearchIn industry the primary reason for carting out R&D is economic and is to strengthen and improve the company’s position and profitability. The purpose of R&D is to generate and provide information and knowledge to reduce uncertainty, solve problems and to provide better data on which management can base decisions. Specific projects cover a wide range of activities and time scales, from a few months to 20 years.1．基础研究和应用研究在工业上进行研究和开发最主要的原因是经济利益方面，是为了加强公司的地位，提高公司的利润。
R&D的目的是做出并提供信息和知识以减低不确定性，解决问题，以及向管理层提供更好的数据以便他们能据此做出决定。
特别的项目涵盖很大的活动范围和时间范围，从几个月到20年。
We can pick out a number of areas of R&D activity in the following paragraphs but if we were to start with those which were to spring to the mind of the academic, rather than the industrial, chemist then these would be basic, fundamental (background) or exploratory research and the synthesis of new compounds. This is also labeled “blue skies” research.我们可以在后面的段落里举出大量的R&D活动。
但是如果我们举出的点子来源于研究院而不是工业化学家的头脑，这就是基础的或探索性的研究Fundamental research is typically associated with university research. It may be carried out for its own intrinsic interest and it will add to the total knowledge base but no immediate applications of it in the “real world” well be apparent. Note that it will provide a valuabletraining in defining and solving problems, i.e. research methodology for the research student who carries it out under supervision. However, later “spin offs” from such work can lead to useful applications. Thus physicists claim that but for the study and development of quantum theory we might not have had computers and nuclear power. However, to take a specifically chemical example, general studies on a broad area such as hydrocarbon oxidation might provide information which would be useful in more specific areas such as cyclohexane oxidation for the production of nylon intermediates.基础研究通常与大学研究联系在一起，它可能是由于对其内在的兴趣而进行研究并且这种研究能够拓宽知识范围，但在现实世界中的直接应用可能性是很小的。
请注意，这种以内就在提出和解决问题方面提供了极有价值的训练，比如，在指导下完成研究工作的学生所接受的研究方法学（的训练）。
而且，从这些工作中产生的“有用的副产品”随后也能带来可观的使用价值。
因此，物理学家宣称要不是量子理论的研究和发展我们可能仍然没有计算机和核能量。
不管怎样，举一个特殊的化学方面的例子吧，在各个领域如烃的氧化方面所做的广泛的研究将为一些特殊的领域如环己烯氧化生成尼龙中间产物提供有用的信息。
Aspects of synthesis could involve either developing new, more specific reagents for controlling particular functional group interconversions, i.e. developing synthetic methodology or complete synthesis of an entirely new molecule which is biologically active. Although the former is clearly fundamental the latter encompasses both this and applied aspects. This term ‘applied’ has traditionally been more associated with research out in industrial laboratories, since this is more focused or targeted. It is a consequence of the work being business driven.通过合成可以生产出一些新的、更特殊的试剂以控制特殊的官能团转换，即发展合成方法或完成一些具有生物活性的新分子的合成。
尽管前者显然属于基础性研究而后者则包括基础研究和实用性研究两部分。
所谓“实用性”习惯上是指与在工业实验室完成的研究联系在一起的，因为它更具目的性，它是商业行为驱动的结果。
Note, however, that there has been a major change in recent years as academic institutions have increasingly turned to industry for research funding, with the result that much more of their research effort is mow devoted to more applied research. Even so, in academia the emphasis generally is very much on the research rather than the development.然而，请注意。
应用化学专业英语介绍
应用化学专业报告学院：理学院专业：应用化学学号：*****************Applied chemistry specialityOne、applied chemistry speciality - main courses: Training target：This specialized raise has the chemical basic theory, basic knowledge in strong experimental skills, can in scientific research institutions, colleges and universities and enterprises and institutions, engaged in scientific research, teaching and management work of the senior specialized talents.Training requirements：Students of this specialty mainly study the basic knowledge of chemistry, the basic theory, basic skills and related engineering knowledge, is the basic research and applied basic research of scientific thought and scientific experiment training, has good scientific literacy, have use knowledge and experimental skills in applied research, technology development and technology management of the basic skills.Main courses:Main subject: chemicalMain course:Inorganic chemistry、, analytical chemistry (including instrument analysis), organic chemistry, physical chemistry (including structural chemistry, chemical engineering foundation and chemical mapping.The main practice teaching links include production practice, graduation thesis, general arrangement and a week of twenty.Length of schooling: four yearsawarded degree：physical or Bachelor'sSimilar professional:chemical applied chemistry chemical biology molecular science and engineering chemical engineering and technology Two、Four chemistry：（Inorganic chemistry, analytical chemistry, organic chemistry, physical chemistry）Inorganic chemistry：Inorganic chemistry relative to organic chemistry, the non carbon. However, some carbon compounds, such as carbon monoxide, carbon dioxide, carbon disulfide, carbonic acid compounds,cyanide and so on are still belongs to the category of inorganic chemistry. analytical chemistry：Analytical chemistry in chemistry basic theory and experiment technology as the foundation, and absorb the physical, biological, statistics, computer, automation and other aspects to enrich itself, so as to solve the content of science and technology proposed all sorts of analysis.The task of analytical chemistry(1) determining the material chemical composition, qualitative analysis(2) measurement of different components of content - quantitative analysis(3) characterization of physical chemical structure, form, energy state, structure analysis, the shape analysis, energy state analysis(4) representation composition, content, structure, form, energy state dynamics characteristics, dynamic analysisorganic chemistry：Organic chemistry is the study of organic compounds and a basic subject. It mainly includes the organic compound classification, structure, naming, property, preparation, chemical reaction and reaction mechanism of law. Organic chemistry is an important branch of chemistry, it is at the molecular level teaching carbon molecular structure and their mutual conversion mechanism, products and their separation, identification and application of basic science, chemistry, biology, pharmacy, medicine, agriculture, environment, materials science support discipline. Is to create new material is an important subject. physical chemistry：Physical chemistry is a physical principle and experiment technology as the foundation, study the properties and behavior of chemical system, found and the establishment of physical chemistry chemical system of the special law of discipline. With the rapid development of science and the mutual infiltration between subjects, physical chemistry and physics, inorganic chemistry, organic chemistry in the content are difficult to accurately demarcation line, so as to constantly create new branches, such as physical organic chemistry, biology, physics chemistry, chemical physics.Three、Applied chemistry specialty elective course: Organic synthesis, botany, colloid and surface chemistry, food chemistry, ecology, the university physics, management, professional English, plant chemistry, biological chemistry, polymer chemistry, and so on.Four、Professional teachers:Li yuqing、Li xianghong、Fuhui、Li huijuan、Liming、Liu shouqing、Liangkun、Chen yuhui、Leiran、and so on.Five、Applied chemistry employment direction：Applied chemistry professional graduates suitable to the petroleum chemical industry, environmental protection, commodity inspection, health and epidemic prevention, customs, medicine, fine chemical plant and other production, technical and administrative departments and the factories and mines enterprises engaged in applied research, technology development, production technology and management work; Can also to scientific research department and school engaged in scientific research and teaching work,。
东华大学应用化学专业英语总结
专业英语重点总结单词Toxic chemicals：有毒化学品 Chemical pollution：化学污染Physical property ：物性 Isolate：分离Determine：测定 Synthesize：合成Fundamental principles：基本原理 Investigation：研究Utilize：利用 Catalyst 催化剂Enzyme 酶 Biosphere 生物圈Heterogeneous catalyst 非均相催化剂 Nanotechnology 纳米技术Carbon monoxide 一氧化碳 Chemical formulas:化学式anion: 阴离子 Oxidation number:氧化值sulphate: 硫酸盐 Hydrides: 氢化物Sodium：钠 cation: 阳离子Covalent bond：共价键 electroneutral: 电中性的Electronegative atom：电负性原子 trivial names:俗名Oxidation:氧化 Peroxides：过氧化物Superoxide：超氧化物 Periodic table：周期表Noble gases: 惰性气 vacant orbital:空轨道Coordination (complex) compound: 配位化合物Unshared pair of electrons:未共用电子对oxidation state:氧化态 hydroxides:氢氧化物caustic soda solution:苛性钠溶液 vacant orbital:空轨道Formula 分子式 Common name 俗名Derivative 衍生物 Acid salt 酸式盐Hydrate 水合物 Anhydrous 无水的Oxidizing agent 氧化剂 Reducing agent 还原剂Oxidation reduction reaction氧化还原反应Electrochemistry 电化学 Electrolysis 电解Strong acid 强酸 Weak base 弱碱Acid-base indicator 酸碱指示剂 Distilled water 蒸馏水Buffer solution 缓冲溶液 Common ion effect 同离子效应Equivalence point 等效点 Neutralization 中和Dissociation 离解度 Anhydride 脱水物Periodic law: 元素周期率 periods (rows):周期group (columns):族 protons:质子Valence electrons：价电子 Halogens: 卤素Atomic radius: 原子半径 alkaline earths:碱土金属attractive force: 吸引力 electronegativity: 电负性electropositive:正电性 univalent ion: 一价离子electron shell: 电子层 bonding force 结合力monatomic 单原子的 Neutrons:中子hydrogen bond 氢键 conduct electricity 导电Electrically neutral 电中性的 Electrostatic 静电的isomerism ：异构现象 Reversible ：可逆的Chirality ：手性 Charge：电荷mirror image：镜像 mirror image：镜像Hydrocarbons：碳氢化合物 Methane: 甲烷propane :丙烷 butane :丁烷-ane:-烷 -ene:烯-yne:炔 -ol：醇-one ：酮 -al：醛-aldehyde: 醛 -acetal:缩醛alkoxy-:烷氧基 -amide: 酰胺-amino:氨基的 -amine : 胺Aquo- 含水的 azo- 偶氮Polythene (PE): 聚乙烯 Benzene：苯Ethene：乙烯 Propene：丙烯double bond:双键 triple bond:三键Valence bond theory 价键理论 skeleton:骨架methyl：甲基 ethyl：乙基alkyl ：烷基 side chains: 侧链substituent:取代基Meth-:甲 eth-:乙propyl-:丙 but-:丁Pent(a)-:戊 hex-:己hepta-:庚 oct-:辛non-:壬 deca-:葵di-:二 tri- : 三tetra- : 四 penta-: 五primary carbon：伯碳 secondary carbon：仲碳tertiary carbon：叔碳 allyl ：烯丙基substitution reaction ：取代反应 free radical：自由基nucleophilic substitution：亲核取代 carbocation ：碳正离子electrophilic substitution：亲电取代 carbanion ：碳负离子addition reaction ：加成反应elimination reaction：消去反应acid anhydride：酸酐 alcohol:乙醇Thermodynamics 热力学 quantum chemistry 量子化学statistical mechanics 统计力学 Kinetics 动力学Equilibrium 平衡 deposition 沉积sublimation 升华 Condensation 冷凝evaporation 蒸发 Melting 熔化Freezing 冷冻 Work 功the states of system系统状态Irreversible 不可逆的 surrounding 环境open system 开放系统 closed system 封闭系统isolated system 孤立系统 impermeable 不可渗透的Adiabatic 绝热的 steady state稳态tap water 自来水 rinse 润洗fine chemicals 精细化学品 Buchner funnel 布氏漏斗bunsen burners 煤气喷灯 tripod supports 三角支架wash bottles 洗瓶 dropper 滴管transfer pipette 移液管 hot plate 轻便电炉wire gauzes 石棉网 test tube brush 试管刷test tube rack 试管架filter paper 滤纸ring stand with rings 带环环架iron support 铁架台utility clamp 铁试管夹 clamp holder 夹柄buret clamp 滴定管夹 extension clamp 万能夹ring clamp 环形夹子 pinchcock 弹簧夹pinch clamp 弹簧节流夹 tubing clamp 管夹hose clamp 软管夹 test tube clamp 试管夹cork stopper 软木塞 rubber stopper 橡胶塞laboratory jack 实验升降台 spatulas 刮刀beaker tongs 烧杯钳 crucible tongs 坩埚钳tweezer 镊子 watch glasses 表面皿goggles 护目镜fume hoods 通风橱capillary melting point tube 毛细熔点管 Caliper 卡尺table balance 托盘天平 analytical balance 分析天平top pan balance 市秤 magnetic stirrers 电磁搅拌器Fahrenheit thermometer 华氏温度计 celsius 摄氏度magnetic stir bar 磁搅拌子 alcohol lamp 酒精灯Spectrophotometers 分光光度计 connection tube 连接管rubber tube 橡皮管 adapter 接合器Socket 套接口 ball joint 球形接头Stopper 塞子 adaptor 转接口splash heads 防溅头 thermometer pocket温度计插孔air leak tube 空气渗漏管 distill head 蒸馏头melting point tube 熔点管 burettes 滴定管Stopcock 活塞 volumetric flask 容量瓶measuring cylinder 量筒 centrifuge tube 离心管graduated pipette刻度吸量管 filter funnel 过滤漏斗chromatography colum 层析柱dropping funnel 滴液漏斗pressure equalizing funnel 均压漏斗 separating funnel 分液漏斗rotary evaporator 旋转蒸发仪 petri dishes 培养皿spectrophotometer 分光光度计 drying tube 干燥管evaporating dishes 蒸发皿 condenser 冷凝管Reflux 回流 erlenmeyer flask 锥形烧瓶round bottom flask 圆底烧瓶 distillation flask 蒸馏烧瓶filtration flask 过滤瓶 reagent bottle 试剂瓶glass desiccator 玻璃干燥器Beaker 烧杯distilling receiver 蒸馏接收器dry tower 干燥塔vaccume dessicator 真空干燥器 extractor 萃取器无机化合物及化学式的命名·二元化合物：氧化物，盐，酸（1）阴离子元素加后缀–ide（2）多价态元素加前缀：mono-, di-, tri-, tetra-, penta-, hexa（3）低价氧化态后缀–ous，高价氧化态后缀–ic·酸：基础元素（前缀 hydro-, 后缀-ic）+ acid·氢氧化物（碱）：金属元素（价态）+ hydroxide·含氧酸及其盐（1）基本元素仅有一种氧化态酸：基础元素加后缀-ic + acid盐：阳离子元素+基础元素加后缀-ate（2）基本元素有二种氧化态酸：基础元素加后缀（ -ous低价态，-ic高价态） + acid盐：阳离子元素 + 基础元素加后缀（ -ite低价态, -ate高价态）（3）基本元素有多种氧化态酸：最低氧化态基础元素（前缀 hypo-, 后缀-ous）+ acid较低氧化态基础元素加后缀-ous+ acid较高氧化态基础元素加后缀-ic + acid最高氧化态基础元素（前缀 per-, 后缀-ic）+ acid 盐：最低氧化态阳离子元素 + 基础元素（前缀 hypo-, 后缀-ite）较低氧化态阳离子元素 + 基础元素加后缀-ite较高氧化态阳离子元素 + 基础元素加后缀-ate最高氧化态阳离子元素 + 基础元素（前缀 per-, 后缀-ate）·不同水分子含量的酸较低水含量前缀 meta较高水含量前缀 ortho·不同基本元素形成的酸前缀 di-, pyro·含硫的酸：源于含氧酸中的氧被硫取代，使用前缀 thio·含氢盐（酸式盐）：源于含有1个以上氢原子酸中的氢原子被金属离子取代，形成酸式盐，氢原子以及金属离子使用前缀 di-, (bi),tri·配位化合物的命名阳离子 + [ 配体及中心原子] (氧化数)前缀：prefix·二元化合物，原子个数前缀1—mono-（可省略）；2—di-；3—tri-；4—tetra-；5—penta-；6—hexa- Eg：·Oxide-氧化物CaO：calcium oxide(quicklime-生石灰)N2O：nitrogen(Ⅰ) oxide = dinitrogen oxide = nitrous oxide(laughing gas) NO：nitrogen(Ⅱ) oxide = nitrogen oxide = nitric oxideN 2O3：nitrogen(Ⅲ) oxide = dinitrogen trioxideNO2：nitrogen(Ⅳ) oxide = nitrogen dioxideN 2O5：nitrogen(Ⅴ)oxide = dinitrogen pentaoxideCu2O: copper(Ⅰ) oxide = dicopper oxide = cuprous oxide-低价态CuO: copper(Ⅱ) oxide = cupric oxide-高价态·Salt-盐ZnF2: znic fluorideSnCl2: tin(Ⅱ) chloride = stannous chlorideHg2Cl2: mercury(Ⅰ) chloride = mercurous chloride (calomel-甘汞)HgCl2: mercury(Ⅱ) chloride = mercuric chloride (sublimate) KCN: potassium cyanide·Acids-酸HBr: hydrobromic acid (aqueous solution)HCN: hydrocyanic acidH2S: hydrosulphuric acid·Hydroxides（bases）-碱NaOH: sodium hydroxide (sodium lye, caustic soda solution) KOH: potassium (hydroxid potassium lye, caustic potash)Fe(OH)2: iron(Ⅱ) hydroxide (ferrous hydroxide)Fe(OH)3: iron(Ⅲ) hydroxide (ferric hydroxide)·Oxo acids and their salts-含氧酸及其盐H2CO3: carbonic acid Na2CO3: sodium carbonateH3BO3: boric acid K3BO3: potassium borate·The basic element is in two oxidation statesHNO2: nitrous acid NaNO2: sodium nitriteHNO3: nitric acid Co(NO3)2: cobalt(Ⅱ) nitrate = cobaltous nirate·The basic element is in more than two oxidation states HClO: hypochlorous acid KClO: potassium hypochloritaHClO2: chlorous acid KClO2: potassium chloriteHClO3: chloric acid KClO3: potassium chlorateHClO4: perchloric acid KClO4: potassium perchlorateHMnO4: permanganic acid AgMnO4:sliver permanganate·The hydrogen salt-含氢盐Na3PO4: trisodium phosphate (tertiary phosphate)Na2HPO4: disodium hydrogen phosphate (secondary phosphate)NaH2PO4: sodium dihydrogen phosphate (primary phosphate)NaHCO3: sodium hydrogen carbonate (sodium bicarbonate) ·Give formulas for the following1.ammonium sulfate: （NH4)2 SO42.barium iodide: BaI23.iron(Ⅱ) sulfate：Fe2SO44.potassium permanganate：KMnO4 5.copper（Ⅱ）oxide：CuO6.carbonic acid：H2CO3科技论文写作Introduction section-研究的是什么问题？Key sections·Materials and Methods section-这个问题是怎么研究的？·Results and Discussion sections-发现了什么？Conclusion section-这些发现意味着什么？1.ABSTRACT （摘要）研究动机、研究方法、主要结果、简要结论摘要应言简意赅，因此以上各项内容争取用一句话说明一项，每项最多不要超过三句话，即：为什么做这个研究？用了什么方法？取得了什么结果？结论是什么？这些问题逐一回答了，摘要就写完整了。
应用化学专业英语(课后答案和课文翻译)
Unit 1 The Roots of ChemistryI. Comprehension.1.It can be inferred from this article which one of the following items is not mainly based on practical use C. Greek chemistry2. It was B. Empedocless who first introduced the idea that all things are not formed from just one element.3. In the development of Greek chemistry, D. Democritus was the first one definiting the ultimately constituents of matter?4. According to Plato, there are B. 4 ―elements‖ whose faces are constituted by regular polygons.5. In the last paragraph,authors think that experiment DD.can deal with the reactions by which one substance is converted into anotherII. Make a sentence out of each item by rearranging the words in brackets.1.The purification of an organic compound is usually a matter of considerable difficulty, and itis necessary to employ various methods for this purpose.2.Science is an ever-increasing body of accumulated and systematized knowledge and is also anactivity by which knowledge is generated.3.Life, after all, is only chemistry, in fact, a small example of chemistry observed on a singlemundane planet.4.People are made of molecules; some of the molecules in people are rather simple whereasothers are highly complex.5.Chemistry is ever present in our lives from birth to death because without chemistry there isneither life nor death.6.Mathematics appears to be almost as humankind and also permeates all aspects of human life,although many of us are not fully aware of this.III. Translation.1.(a)化学过程；(b)自然科学；（c）蒸馏技术(a) chemical process (b) natural science (c) the technique of distillation2.正是原子构成铁、水、氧等。
应用化学求职信英语
Dear Hiring Manager,I am writing to express my interest in the position of Application Chemist at your esteemed company. With a solid background in applied chemistry and a passion for research and development, I believe that I would be a valuable asset to your team.I have recently completed my master's degree in chemistry at XYZ University, where I specialized in applied chemistry and material science. During my time at the university, I gained extensive experience in conducting research and performing experiments in various fields of chemistry, including organic synthesis, physical chemistry, and inorganic chemistry. I have also had the opportunity to work in a state-of-the-art laboratory, where I honed my technical skills and developed a strong understanding of laboratory equipment and techniques.Throughout my academic career, I have been consistently committed to excellence and have received numerous awards and recognitions for my academic achievements. I have also actively participated in extracurricular activities, such as serving as a teaching assistant for undergraduate students and participating in research projects led by prominent faculty members. These experiences have not only enhanced my knowledge and skills in applied chemistry but have also taught me the importance of teamwork, effective communication, and problem-solving.In addition to my academic background, I have also had the opportunity to gain practical experience through internships and research assistant positions. During my internships, I worked on various projects related to materials development and characterization, where I gained hands-on experience in applying chemical principles to real-world problems. These internships also allowed me to work in collaborative environments, where I developed strong interpersonal skills and the ability to work effectively in a team.As an Application Chemist, I believe that my strong technical skills, coupled with my passion for research and development, would make me a valuable asset to your company. I am confident in my ability to adapt to new technologies and learn quickly, allowing me to contribute to thegrowth and success of your company. I am particularly interested in working on projects that involve material development and characterization, as well as those that have a significant impact on the pharmaceutical, materials, or energy industries.In conclusion, I am excited about the opportunity to join your company and contribute to its continued success. I am confident that my academic background, practical experience, and passion for applied chemistry make me a strong candidate for the Application Chemist position. I have attached my resume for your review, and I would welcome the opportunity to discuss my qualifications further with you. Thank you for considering my application.Sincerely,[Your Name]。
东华大学应用化学专业英语总结
东华大学应用化学专业英语总结专业英语重点总结单词Toxic chemicals：有毒化学品Chemical pollution：化学污染Physical property ：物性 Isolate：分离Determine：测定 Synthesize：合成Fundamental principles：基本原理 Investigation：研究Utilize：利用 Catalyst 催化剂Enzyme 酶Biosphere 生物圈Heterogeneous catalyst 非均相催化剂Nanotechnology 纳米技术Carbon monoxide 一氧化碳Chemical formulas:化学式anion: 阴离子 Oxidation number:氧化值sulphate: 硫酸盐 Hydrides: 氢化物Sodium：钠 cation: 阳离子Covalent bond：共价键electroneutral: 电中性的Electronegative atom：电负性原子 trivial names:俗名Oxidation:氧化Peroxides：过氧化物Superoxide：超氧化物Periodic table：周期表Noble gases: 惰性气vacant orbital:空轨道Coordination (complex) compound: 配位化合物Unshared pair of electrons:未共用电子对oxidation state:氧化态 hydroxides:氢氧化物caustic soda solution:苛性钠溶液vacant orbital:空轨道Formula 分子式 Common name 俗名Derivative 衍生物 Acid salt 酸式盐Hydrate 水合物 Anhydrous 无水的Oxidizing agent 氧化剂Reducing agent 还原剂Oxidation reduction reaction氧化还原反应Electrochemistry 电化学 Electrolysis 电解Strong acid 强酸 Weak base 弱碱Acid-base indicator 酸碱指示剂Distilled water 蒸馏水Buffer solution 缓冲溶液Common ion effect 同离子效应Equivalencepoint 等效点 Neutralization 中和Dissociation 离解度 Anhydride 脱水物Periodic law: 元素周期率 periods (rows):周期group (columns):族 protons:质子Valence electrons：价电子 Halogens: 卤素Atomic radius: 原子半径alkaline earths:碱土金属attractive force: 吸引力electronegativity: 电负性electropositive:正电性univalent ion: 一价离子electron shell: 电子层 bonding force 结合力monatomic 单原子的 Neutrons:中子hydrogen bond 氢键conduct electricity 导电Electrically neutral 电中性的Electrostatic 静电的isomerism ：异构现象Reversible ：可逆的。
应用化学的认识作文
应用化学的认识作文英文回答：Introduction.Applied chemistry is a branch of chemistry that uses scientific principles to solve real-world problems. It involves the study of the composition, structure, properties, and reactions of matter in order to develop new materials, processes, and products.Importance of Applied Chemistry.Applied chemistry plays a crucial role in modern society. It has enabled the development of numerous technologies that have improved our quality of life, including pharmaceuticals, plastics, fertilizers, and renewable energy sources.Examples of Applied Chemistry.Some common examples of applied chemistry include:Pharmaceuticals: The development of drugs to treat diseases and improve health.Materials science: The creation of new materials with advanced properties, such as strength, durability, and conductivity.Environmental chemistry: The study and mitigation of environmental pollution.Food chemistry: The analysis and preservation of food products.Energy chemistry: The development of alternative energy sources and the storage of energy.Applications in Various Industries.Applied chemistry has applications in a wide range ofindustries, including:Healthcare: The development of new drugs, medical devices, and diagnostic tools.Manufacturing: The production of chemicals, plastics, and other materials.Agriculture: The development of fertilizers, pesticides, and crop protection products.Energy: The development of renewable energy sources and the storage of energy.Environmental protection: The study and mitigation of environmental pollution.Career Opportunities in Applied Chemistry.The field of applied chemistry offers a wide range of career opportunities for those with a strong background in the field. These opportunities include:Research & Development: Scientists and engineers develop new materials, processes, and products.Production: Chemists work in manufacturing plants to produce chemicals and other products.Quality Control: Chemists ensure the quality of products by conducting tests and analyses.Environmental Consulting: Chemists provide advice to businesses and organizations on environmental compliance and sustainability.Education: Chemists teach at universities and colleges.Conclusion.Applied chemistry is a versatile and dynamic field that impacts numerous aspects of our daily lives. It offers exciting career opportunities and plays a crucial role in addressing global challenges such as healthcare, energysustainability, and environmental protection.中文回答：导言。
应用化学外文翻译药物化学.doc
原文题目：Concentration of flavonoids and phenolic compounds in aqueous and ethanolicpropolis extracts through nanofiltrationAbstractPropolis has a variable and complex chemical composition with high concentration of flavonoids andphenolic compounds present in the extract. The extract varies with the solvent used in extraction. Ethanol extracts more phenolic acid and polar compounds than water. Before their use in industry, extracts must be concentrated but the use of high temperatures can degrade some compounds. Membrane pro-cesses is an option that allows concentration at low temperatures. Nanofiltration was carried out withaqueous and ethanolic extracts and each extract results in two distinct fractions: permeate and retentate. The capacity of the membrane to retain the compounds was verified by spectrophotometric analysis: for aqueous solution, the membrane retained around 94% of the phenolic compounds and 99% of the flavonoids, while for the ethanolic solution these values were 53% and 90%, respectively. Ferulic acid retentionindex was 1.00 and 0.88 to aqueous and ethanolic solutions, respectively. Thus, the nanofiltration processshowed high efficiency in the concentration of propolis extracts.1 IntroductionOver the last few decades, interest in functional foods has beengrowing fast, leading to the discovery of new functional components or processes that can improve food processing, as well as products that may help to retard aging or avoid diseases. In this context, bee products have gained the attention of consumers and researchers, due to their chemical compositions and functional properties. Propolis is one of the bee products with functional properties, but it cannot be consumed as a food because it is a resinous substance. It is prepared from the buds and exudates of certain trees and plants. These substances are transformed by the addition of wax and the enzyme glucosidase present in the bee saliva in order to form propolis (Bankova et al., 2000; Park et al., 1998). The product obtained is used by honeybees to protect the hives against invaders and contamination, to seal holes and to maintain the temperature. Some important characteristics have been reported for thissubstance, such as anti-microbial and antioxidant effects, anesthetic properties and others. Due to these characteristics, which can bring health benefits, propolis is considered a functional ingredient and is used in food, beverages, cosmetics and medicine to improve health and prevent diseases (Burdock, 1998; IFIC, 2009). There are over 150 constituents in propolis, including polyphenols, terpenoids, steroids and amino acids. Flavonoids are one of the most important groups and can represent around 50% of the propolis contents,depending on the region where it is collected, since its characterist ics is influenced by plants and weather (Krell, 1996; Park et al., 1998). Kumazawa et al. (2004) tested the antioxidant activity of propolis from various geographic origins and showed different activities for each sample. Other studies indicated that the propolis from Europe and China contained many kinds of flavonoids and phenolic acids, whereas the Brazilian samples had more terpenoids and prenylated derivatives of p-cumaric acid (Bankova et al., 2000). Finally, each combination of compounds in the propolis of acertain origin can represent specific characteristics in the final product.The most common propolis extracting process uses ethanol as the solvent. However, this has some disadvantages such as the strong residual flavor, adverse reactions and intolerance to alcohol of some people (Konishi et al., 2004). Researchers and industry are interested in producing a new type of extract with the same compounds extracted by the ethanolic method, but without the disadvantages. Water has been tested as the solvent, but resulted in a product containing less extracted compounds (Park et al., 1998). Konishi et al. (2004) tested water with a combination of some tensoactive compounds to replace part of the alcohol used in propolis extraction and all the tests were efficient in extracting it, and the product showed good anti-microbial activity.Depending on the application, the solvent in propolis extracts must be reduced or eliminated. The processes that are used today, as lyophilization, vacuum distillation and evaporation, have some disadvantages like the use of high temperatures and high energy consumption. Lyophilization requires large amounts of energy, since the sample needs to be maintained at À20 °C for at least 24 h, and energy is also required for the sublimation of the solvent used during preparation of the extract. Moreover, the method often requires a previous stage of concentration, maintaining the product at 70 °C until part of the solvent is evaporated.Vacuum distillation requires great amounts of energy to generate the vacuum, and can lead to loss of compounds of low molecular weight, which can be removed together with the solvent evaporated in the system. Evaporation maintains the extract underheating at 70 °C, until all the solvent is removed. This process, in addition to the high demand for energy, can degrade the flavonoid and phenolic compounds in propolis, due to the temperature used. However, it is the process that gives greater ease of implementation in companies due to low cost on the equipment required compared with the previous cases. The use of membrane concentration processes has been growing due to certain advantages, such as: low temperatures, absence of phase transition and low energy consumption (Matta et al., 2004). This procedure is based on the principle of selective permeation of the solute molecules through semi-permeable, polymeric or inorganic membranes. The driving force for mass transfer across the membrane in most membrane processes, such as a microfiltration, ultrafiltration, nanofiltratio n and reverse osmosis is mechanical pressure (Maroulis and Saravacos, 2003). Nanofiltration is a unit operation that permits many applications, such as solvent recovery from filtered oil, exchange of solvents in the chemical industry (Geens et al., 2006), co ncentration and purification of ethanolic extracts of xantophylls, which is important in both the pharmaceutical and food industries (Tsui and Cheryan, 2007) and in wine concentration (Banvolgyi et al., 2006), as well as in juice concentration (Vincze et al., 2006) in the food industry.The objective of this study was to investigate the membrane concentration of propolis extracts using water and ethanol as the solvents, exclusively, verifying the quality of the concentrated products in terms of the retention of flavonoids and phenolic compounds during processing. The process was evaluated according to the permeate flux, influence of temperature and pressure and concentration factor. The results obtained for each solution were compared to verify the viability of developing a new propolis product, based on water as the solvent.2. Materials and methods2.1. PropolisRaw propolis was obtained from Apis mellifera beehives in the State of São Paulo, Brazil, and was acquired in a single batch, in order to minimize the variability associated with the vegetation used for its production and the weather conditions. It was stored under第 3 页refrigeration (4 °C) until use in the preparation of extracts.The propolis produced in this region is characterized as group 12 (Brazil has 12 different groups of propolis, with distinct characteristics) and presents a great amount of soluble substances, antimicrobial activity against Staphylococcus aureus and Streptococcus mutans and greater anti-inflammatory activity than samples from other parts of the country, which can be associated with the higher concentrations of flavonoids and phenolic compounds found in this group (Park et al., 2002).The ethanolic propolis solution was prepared from crude propolis previously comminuted in a bench blender with a 500 W motor, homogenized, weighed on a semi-analytical balance and mixed with 80% ethanol. The mixture was kept at room temperature for 7 days and manually stirred once a day. After this period, the sample was centrifuged (Beckman –Allegra 25-R, Beckman Coulter, German) at 8800 g for 20 min. The supernatant was filtered and refrigerated for 3 h at 4 °C and then filtered again for wax removal. Finally, the esulting extract was stored at room temperature in the dark.Preparation of the aqueous solutions followed the same procedures, using deionized water. Each solution was prepared in a proportion of 20% propolis and 80% solvent. Both extracts were evaluated with respect to their flavonoid and phenolic compounds contents, to be compared with the concentrated products.2.2. Determination of total flavonoidsThe total flavonoid content of the propolis solutions was determined by the aluminum complexation method (Marcucci et al., 1998). In this procedure, the extracted solutions were diluted in the proportion of 1:10 (0.5 mL) and mixed with 0.1 mL of 10% aluminum nitrate, 0.1 mL of 1 mol/L potassium acetate and 4.3 mL of 80% ethyl alcohol. The samples were kept at room temperature for 40 min and the absorbance read at 415 nm. Quercetin was used as the standard to produce the calibration curve. The mean of three readings was used and the total flavonoid content expressed in mg of quercetin equivalents (mg/g).2.3. Determination of the phenolic compoundsThe polyphenols in the propolis solutions were determined by the Folin–Ciocalteau colorimetric method (Kumazawa et al., 2004). According to this procedure, the extracted solution was previously diluted in the proportion of 1:10 (0.5 mL) and then mixed with 0.5 mL of the Folin–Ciocalteau reagent and 0.5 mL of 10% Na2CO3. The absorbance was readat 760 nm after 1 h of incubation at room temperature. Gallic acid was used as the standard to produce the calibration curve. The mean of three readings was used and the total phenolic content expressed in mg of gallic acid equivalents (mg/g).2.4. HPLC determinationThe compounds present in the initial extract, permeate and concentrated products, were determined by HPLC as described by Parket al. (1998). Three hundred microliters of each solution were injected into a liquid chromatograph (Shimadzu, Tokyo, Japan) connected to a diode-array detector at 260 nm. The mobile phase was water/acetic acid (19:1, v/v) (solvent A) and methanol (solvent B), with a constant flow rate of 1 mL/min. The gradient started at30% solvent B, passing to 60% at 45 min, 75% at 85 min, 90% at 95 min and back to 30% at 105 min. The column was maintained at a constant temperature of 30 °C and the chromatograms processed using the computer software Chromatography Workstation (Shimatzu Corporation, Tokyo, Japan). The initial and concentrated samples were diluted in 1.5 mL of distilled water and the permeate sample was injected without dilution. The following authentic standards of phenolic acids and flavonoids (Extrasynthese, Genay, France) were examined: q-cumaric acid, ferulic acid, cinnamicacid, gallic acid, quercetin, kaempferol, kaempferide, apigenin, isorhamnetin, rhamnetin, sakuranetin, isosakuranetin, hesperidin, hesperetin, pinocembrin, chrysin, acacetin, galangin, myricetin, tectochrysin and artepillin C, as they correspond to the most usual compounds present in propolis.2.5. Membrane concentrationIn this study, the propolis extracts were concentrated using a tangential filtration system on a pilot scale, with a nanofiltration membrane as seen in the schematic diagram shown in Fig. 1. The experiments were performed on pilot equipment that permits the batch circulation mode, which means that both permeate and concentrate could be carried back to the feed tank. The permeate was totally removed just in a single experiment, where it was necessaryto obtain the concentrated product of the process. The nanofiltra tion module is equipped with a NF90 membrane (Osmonics, Minnetonka, USA) which is composed of polyamide and polysulphone, with 0.6 m2 of filtration ar ea and 98% rejection of MgSO4 ina test performed by manufacturing with a spiral module at 20 °C and 6.0 bar. Approximately5.0 L of each solution permeated through the membrane over 30 min, this being the time necessary to complete the concentration in an open system, which means that the permeate第 5 页was removed from the process. In the trials the permeate was removed and the retentate re-circulated until a concentration factor of around four. The concentration factor is calculated according to Eq. (1):Fig. 1. Schematic diagram of the nanofiltration unit where Vf is the total volume used in the feed, Vc is the volume collected in the concentrate fraction and Fc is the concentration factor. Other experiments were carried out at different temperatures (20–45 °C) and pressures (2.0–5.0 bar), in order to evaluate the influence of these parameters on the permeate flux and the concentrated product quality. In these experiments, both the permeate and retentate were maintained under re-circulation in closed sy stems. The permeate flux was calculated according to the following equation: J=Vp/t*Ap (2)where Vp is the permeate volume collected during the time intervalt and Ap is the membrane surface area of permeation. The quality of the filtration process was measured according to the quantity of flavonoids and phenolic compounds present in permeate, evaluated as described in Sections 2.2–2.4, and the efficiency was measured according to the flux permeate rate and retention index. This index m easures the relation between the amounts of the compound of interest in permeate and in the concentrated solution, which demonstrates the ability of the membrane to retain this compound under the experimentalconditions. The index is calculated according to Eq. (3), in which R is the retention index, Cp is the concentration of the compound of interest in the permeate, and Cr is the concentration of the same compound in the retentate:R=1-Cp/Cr (3)It is important to know the rate of fouling that occurs in the membrane process, and one way of measuring this is to compare the permeate flux of the solution under study with the permeate flux when water is used as feed solution, under different pressures. Usually a variation in system pressure will cause a change directly proportional to the permeate flux. The fouling influence was measured by comparison of the permeate flux of the aqueous propolis extract with the flux of distilled water only, increasing the pressure from 1.0 to 5.0 bar.3. Results and discussionThe membrane process was carried out with the aqueous and ethanolic solutions in a closed system, in which the retentate and permeate streams being conducted back and mixed in a feed tank isolated from the environment, to evaluate the variation in pe rmeate flux with time. The temperature was maintained at 20 °C and the pressure at 5.0 bar. The results are shown in Fig. 2.After stabilization of the process, the permeate flux began to decrease, after around 15 min of processing. The rate of decrease was higher for the alcoholic extract than for the第7 页aqueous extract, evidencing a greater rate of fouling with the alcohol solution. After 20 min of processing, the permeate flux tended to stabilize, that is, concentration polarization already occurred and fouling did not increase with time. The permeate flux in the stable region was about 12.0 L/h m2and 25.0 L/h m2for alcoholic and aqueous solutions, respectively. The difference between the permeate flux of these solutions can be explained by their different compositions: the alcohol extract contains more compounds of low molecular weight, thus its concentration is more difficult to achieve, and this reduces the flux rate. Some of these compounds form a kind of wax which can cause more fouling in membrane.Tsui an d Cheryan (2007) used nanofiltration to purify alcoholic corn extracts in the production of xanthophylls, and obtained a permeate flux of around 10.0 L/h m2when working at 27 bar and 50 °C. Hossain (2003) studied the membrane concentration of anthocyanins f rom blackcurrant pomace extracts using ultrafiltration, obtaining a maximum permeate flux of 17.3 L/h m2 at 1.4 bar and 18 °C. Using nanofiltration a permeate flux of 20 L/h m2 was obtained at 20 bar and 50 °C in the concentration of red wine (Banvolgyi et al., 2006). The red wine concentration process is important since it can be considered a similar process to the concentration of alcoholic propolis, considering that they have similar compounds in solution and use alcohol as the solvent. The similarities between the processes allow a comparison between results. Low pressures (around 6 bar) were used in the propolis concentration process, when compared to other processes cited in the literature, but even so the values obtained for the permeate flux were similar to those obtained in the other processes. Therefore this process can be assumed to be viable, mainly because of the reduced energy requirements necessary to generate the lower pressure.The pressure adopted was not characteristic of nanofiltration processes,but was sufficient to carry out this concentration procedure.Fig. 3 shows the difference between the curve of the permeate flux for the aqueous propolis extract and the curve of the permeate flux for distilled water to measure the degree of fouling in the process with the aqueous propolis solution.The difference between the permeate fluxes of water and the propolis solution shows the amount of fouling in the process, under the same conditions of temperature and pressure. This parameter increased, reaching 32% at 5.0 bar. The procedure also provided information on how the flux wasaffected by a pressure variation, showing that the flux changed linearly with the pressure in the region studied. In this pressure range of operation, the concentrated products did not present significant variation among the experiments.By increasing the temperature from 20 to 45 °C and maintaining the pressure at 6.0 bar it was possible to determine the relation ship between the temperature and the permeability of the membrane. Permeate flux increased proportionally, by around 8% per degree of temperature, as shown in Fig. 4. This result may be attributed to the effect of temperature on the viscosity of the solution. Also, the composition of the concentrated products obtained at different temperatures showed no significant difference among them, thus, a higher flux can be obtained by increasing the temperature.The initial solutions, permeates and concentrates obtained by nanofiltration in open system were all subjected to a spectrophotometric analysis as described in Sections 2.2 and 2.3. The results for the aqueous solution indicated that this permeate only contained small amounts of phenolic compounds and flavonoids, while the permeate from the ethanolic solution showed greater amounts, mostly of low molar weight phenolic compounds. Considering the losses in the compounds of interest in the resulting permeate, as compared to the initial solution, it can be seen that the aqueous solution of propolis retained almost 99% of the flavonoi ds and 84% of the phenolic compounds. However, for the ethanolic第9 页solution, these values were 90% and 53% for the flavonoids and phenolic compounds, respectively,as shown in Table 1. The lower retention obtained can be explained by the occurrence of plasticization in the case of ethanolic solution. This phenomenon can cause a membrane swelling or dilation, which in turn can increase the membrane diffusivity and solubility, causing loss of compounds in process.The results for the determination of flavonoids an d phenolic compounds carried out by spectrophotometric methods were verified by HPLC analysis, as described in Section 2.4. The substances were identified by a comparison of their retention times and ultraviolet spectra with those of standards in the literature. Chromato grams were obtained from the initial aqueous extract, and from the concentrated and permeated products, which are represented in Fig. 5a–c, where the numbers 1–3 indicate the peaks identified in the HPLC analysis.Table 2 shows the results of the quantitative analysis for all samples from the aqueous propolis solution. Comparing these data, it can be seen that there were no losses of ferulic acid to the permeate and only 20% of the caffeic acid present in the initial solution was lost to the permeate, this compound thus being the most abundant in the concentrated extract, of the compounds identified. All the aqueous solutions showed peaks located in the region that第 11 页represents a retention time of up to 20 min. This occurred since the water, being a polar material, only extracts polar compounds. The last peak identified in the permeated solution, probably does not represent an isolated compound but interference in the system, since this compound was not present in the other chromatograms. Ferulic acid was not identified in the permeated solution, indicating that no losses to the permeate occurred. The other peaks in the chromatograms represented compounds that could not be identified according to the standards in the literature. The permeated solution showed a small amount of compounds in low con centration, allowing to verify the efficacy of the membraneconcentration process.Park et al. (1998) analyzed an aqueous propolis solution prepared in the laboratory, using HPLC, and obtained similar results to those presented in Fig. 5a, reporting peaks with low retention times that represent polar substances, and identifying the compounds quercetin and pinocembrin. In their experiment, the proportions of water and alcohol in the solvents for propolis extraction were varied. Initial solutions contained 0–90% of alcohol, through which it was demonstrated that increasing the proportion of alcohol in the solution also increased the amount ofextracted flavonoids and phenolic compounds in the propolis.The chromatograms obtained for the ethanolic solutions are presented in Fig. 5d–f. It was possible to identify peaks in the ethanolic solution throughout the process. Compounds with a retention time greater than 20 min are apolar and were extracted by ethanol, this being an advantage of the use of this solvent as compared to water, which does not extract apolars. On analyzing the chromatogram it can be seen that a considerable amount of cumaric acid was lost to the permeate (peak number 2 in Fig. 5f). This acid belongs to the phenolic acid class and has a low molar weight, which could explain the low retention capacity of the membrane for this compound. The results of the spectrophotometric analysis shown in Table 1 indicate a loss of phenolic compounds to the permeate, accounting for the cumaric acid and other compounds not being identified by the HPLC method. Using the data given in Tables 2 and 3 the retention index could be calculated from Eq. (2). These results can be observed in Table 4. The retention indexes verified t hat the membrane process retained the compounds of interest better when using aqueous solutions, since this resulted in smaller losses of the compounds studied to the permeate, as compared to such losses when working with the alcoholic solution. Cumaric acid was an exception, since only 56% of this compound was not lost to permeate. Despite the loss of compounds, the values obtained represent a high retention index and verify that the nanofiltration process is appropriate for propolis extracts.During their study on the concentration of red wine by nanofiltration, Banvolgyi et al. (2006) obtained a retention index of 88% for total acids, 50% for free sulfuric acids and 93% for the total extracts. Tsui and Cheryan (2007), working with the purification of xantophy lls by nanofiltration obtained a retention index of 90% for total solids, 88% for proteins and 98% for xanthophylls, the major compound of their study.In the present study, the values obtained for the retention indexes were very similar tothose cited in the literature for similar processes..4 ConclusionsThe results showed that nanofiltration can be considered as a good alternative for concentrating propolis extracts, since the membrane retained most of the flavonoids and phenolic compounds, which are of major importance to propolis quality. Particularly in the case of the aqueous extract, it could be considered that there was no loss of compounds to the permeate solution, since almost 100% of the major compounds were retained. In the experiments with alcoholic propolis, the losses were considerable but this is a consequence of the higher amount of compounds extracted by alcohol. However, the method can be used for alcoholic solution since almost 90% of the flavonoids were retained. Application of this technology could increase the use of propolis in many industrial applications, it being feasible to use the aqueous extract in new research projects and in the development of new products with functional properties. Furthermore, this process allows removal of the solvent from the extract, reducing the disadvantages associated with using alcoholic extractions. It should be noted that compared with other concentration methods, in the membrane process the product is not submitted to high temperatures and there is no change in the physical state of the solvent, which means that the functional properties of the compounds of interest are preserved and the process as a whole is energy saving.第13 页译文题目：黄酮类化合物和酚类化合物在水中和乙醇蜂胶中通过纳滤膜的提取率关键词:蜂胶膜浓度黄酮类化合物酚类化合物纳滤摘要：蜂胶具有可变的、复杂的化学成分，且蜂胶中黄酮类化合物的浓度较高，酚类化合物存在于蜂胶萃取物。
应用化学英文作文
应用化学英文作文英文：As an applied chemist, my job involves using chemical principles and techniques to solve practical problems in various industries. This can include developing new materials for use in construction, improving the efficiency of industrial processes, and ensuring the safety andquality of consumer products.One example of how I have applied chemistry in my work is in the development of a new type of insulation material for buildings. By using my knowledge of the properties of different chemicals and their reactions, I was able to create a material that is both highly effective at insulating and environmentally friendly.Another example is in my work with a pharmaceutical company. By applying my understanding of how drugs interact with the body, I was able to help develop a new medicationthat is more effective and has fewer side effects than previous treatments.Overall, being an applied chemist requires a strong foundation in chemical principles, as well as the ability to think creatively and apply that knowledge to real-world problems.中文：作为一名应用化学家，我的工作涉及使用化学原理和技术来解决各种行业中的实际问题。
应用化学专业英语1单元翻译
应用化学专业英语1单元翻译第一篇：应用化学专业英语1单元翻译1.Chemistry can be broadly defines as the science of molecules and their transformations.化学可以广泛地定义为科学的分子和他们的转换。
化学可以广泛地定义为科学的分子和他们的转换。
与数学不同，化学比人类更久远。
生命的出现和人类生活在我们地球上都最可能是特殊化学过程的结果。
化学过程存从古至今存在人们的生活中。
•最初，这些过程不受我们的控制，例如，果汁的发酵，肉和鱼的腐烂，木材的燃烧。
后来，我们学着控制化学过程，用它们来准备一系列不同的产品例如食物。
在化学的发展中，四个阶段是突出的:史前化学，希腊化学，炼金术和科学化学。
The early beginnings of chemistry were clearly motivated by practical needs of people.早期的化学显然是出于实际的需要。
火的发现为远古人提供了第一个机会去实现控制化学反应过程。
他们学会制备铜制物品，铜和其它材料是现成的。
.由于化学过程的使用早于人们的书写，因而没有书面记录有关它们的化学技巧。
可以判断他们的化学能力只有从考古的发现的各个手工艺品。
正如早期的数学发展，清楚的预示着实际需求影响着化学的发展。
但化学和数学在这个阶段可能没有互相影响。
如果它们影响了，但是没有记录证明这个。
Greek chemistry was based mainly on speculation rather than on experiment.希腊化学主要基于猜测而不是实验。
这是所有古代希腊化学的一个共同特征。
古代希腊化学家实际是希腊哲学家。
所以不足为奇的是希腊人思考比实验更有兴趣。
实际上他们很少进行实验以外的思维实验。
对于数学来说这是一个好方法，但没有一个人把它推荐在物理、化学或生物科学上。
应用化学专业英语（课后答案和课文翻译）
Unit 1 The Rootsof Chemis tryI. Compre hensi on.1.It can be inferred from this articl e whichone of the followi ng itemsi s not mainly basedon practi c al use C. Greekchemis try2. It was B. Empedo cless who firsti ntrod ucedthe idea that all things are not formed from just one elemen t.3. In the develo pment of Greekchemis t ry, D. Democri tus was the first one defini tingthe ultimatelyconsti tuent s of matter?4. Accord i ng to Plato, thereare B. 4 ―elemen ts‖ whosefacesare consti tuted by regula r polygons.5. In the last paragraph,authors thinkthat experi ment DD.can deal with the reacti ons by whichone substa n ce is converted into anothe rII. Make a senten ce out of each item by rearra nging the wordsin bracke ts.1.The purifi catio n of an organi c compou nd is usuall y a matter of consid erabl e diffic ulty, and itis necess ary to employ variou s method s for this purpos e.2.Scienc e is an ever-increa singbody of accumu lated and system atize d knowle dge and is also anactivi ty by whichknowle dge is genera ted.3.Life, afterall, is only chemis try, in fact, a smallexampl e of chemis try observ ed on a si nglemundan e planet.4.People are made of molecul es; some of the molecul es in people are rather simple wherea sothers are highly comple x.5.Chemist ry is ever presen t in our livesfrom birthto deathbecause withou t chemis t ry therei sneithe r life nor death.6.Mathem atics appears to be almost as humanki nd and also permea tes all aspect s of humanlife,althou gh many of us are not fullyawareof this.III. Transl ation.1.(a)化学过程；(b)自然科学；（c）蒸馏技术(a) chemic al proces s (b) natura l science (c) the techni que of distil latio n2.正是原子构成铁、水、氧等。