甲烷

A two-scale k-ε turbulence model was adopted to calculate turbulent velocity field, and the probability density function method was combined with the Lagrangian flamelet model to predict the turbulent scalar fields.Detailed chemical reaction mechanism GRI-Mech 3.0 was incorporated to describe methane oxidation and nitrogen oxides formation.

采用一个双尺度的 k-ε湍流模型计算速度场，将概率密度函数方法和Lagrangian火焰面模型相结合求解标量场，燃料甲烷的氧化过程和氮氧化物的生成过程采用详细的GRI-Mech 3.0机理描述。

Base on the turbulent shoot non-premixed combustion of methane/air, make a coordinate transform on flame for reactive scalar equation, build laminar flamelet model for two dimension steady state non-premixed turbulent reacting flows.

以甲烷／空气的湍流射流扩散燃烧为基础，对通用的反应标量方程在火焰面上进行坐标变换，建立二维稳态湍流扩散火焰的小火焰模型。

In this work, the absorption and fluorescence spectra of dibenzoyl methane have been studied.

本文研究了一种新型的紫外吸收剂——二苯甲酰甲烷的光谱特性。

Fluoroform (HFC-23) is manually compounded gas which is colorless, almost flavorless, and non-conductive,it doesn't cause ozone hole, and it is low toxic, non-polluted, it is also a clean gas that does no harm to human body.

三氟甲烷是一种人工合成的无色、几乎无味、不导电气体，具有不破坏大气臭氧层、低毒、无污染等特点，是一种对人体无害的洁净气体。

Recently several years,the company is engaged in development of Halon substitute,and since year 1997 has successively succeeded in development of 5 kinds substitute,HFC227ea heptafluorpropane,HFC23 fluoroform,HFC236fa hexafluoropropane ,HCFC/A,HCFC/C.

近年来，我公司致力于哈龙替代品的开发，97年以来先后开发成功七氟丙烷、三氟甲烷、六氟丙烷、HCFC/A、HCFC/C五种替代品，形成千吨级生产规模，并已大批量出口海外。

After years of efforts, our products have proceeded from a sole category to diversified, packaging and serial categories, such as Heptafluoropropane (HFC-227ea) Fire Extinguishing System, High Press Carbon Dioxide Fire Extinguishing System ,Fluoroform (HFC-23) Fire Extinguishing System, Integrate Gas IG-541 Fire Extinguishing System, Foam Extinguishing System , Fire extinguisher , Water fire-fighting system, Special grade inorganic fire resistant roller shutters, Composite steel fire resistant roller shutters, Fire damper, Smoke fire damper, Low-noise cabinet centrifugal fire blower, Axial flow fire smoke exhaust blower, etc. All technical specifications fully satisfied the level of national standard.

经过多年的努力，公司的产品经历了由单一品种到多元化、配套化、系列化的发展过程，现有七氟丙烷（HFC-227ea）自动灭火系统、高压二氧化碳自动灭火系统、三氟甲烷(HFC-23)自动灭火系统、混合气体IG-541自动灭火系统、泡沫灭火系统、灭火器、水消防系统、特级无机复合防火卷帘、复合型钢质防火卷帘、防火阀、排烟防火阀、低噪声柜式离心消防风机、轴流式消防排烟风机等产品，所有产品各项技术指标完全达到国家标准。

Currently,made up of 8 companies and 3 R %26amp; D institutes, Dongyue group has formed powerful industry fundaments and R %26amp; D platform and created hi-tech industrial chain and product group from fluorspar mining to AHF the base material of fluorchemical industry, from chloride methane to environment friendly protection refrigerants, and to fluoropolymer and post-treated products, up to top tech product HFP, VDF, TFE,PFSA and ion membrane etc.

集团拥有8个企业和三个科研机构，形成了强大的产业基础和研发平台，建成了从氟矿石开采到氟化工基础材料无水氟化氢，从甲烷氯化物到绿色环保制冷剂，再到含氟高分子材料及其深加工，以至到尖端技术六氟丙烯、偏氟乙烯、全氟乙烯、全氟离子交换树脂及离子膜等组成的高新技术产业链和产业群。

Formamide was used as the background electrolyte solvent and citric acid-Tris as the electrolyte with the UV detection at 254 nm.

以甲酰胺为介质、柠檬酸-三羟甲基氨基甲烷为电解质、在254nm波长下紫外检测。

From the fact that the hydrogens of microbial methane originate in water, it may be deduced that with the reduction of HCO(superscript – subscript 3) a transfer of H atom occurs from the O atom to the C atom within HCO3 anions formed by the disassociation of dissolved CO2 in water, and furthermore, the formyl group forms.

由前人研究结果推断HCO(上标–下标 3)在脱去两个O原子的同时，可能发生了亲核重排，羟基H原子迁移到C原子上，形成了甲酰基HCO(上标-，使甲烷的第一个H原子来源于水。

Experimental process: jing and 3- methyl -2- methyl ethyl ketonesynthesizes by the benzene zong; Again the glacial acetic acidcatalysis produces 2, 3, 3 - trimethyl - 3H - yinduo; Again has thealkylate response production yinduo iodide after the methyl iodide;The iodide takes off molecular HI under NaOH to become freejier thealkali; Adds 5 - nitryls salicylic aldehydes in the ethyl alcohol forthe solvent under if to respond finally produces 6 '- the nitryl yinduolin spiral benzene and pinan; Through the infrared spectrum andthe ultimate analysis irrevocably proved its structure, and studiedthe annulus with to open the annulus the light to send changes colorthe performance, explained in different solvent medium ultravioletabsorption spectrometry solvent effect, and the comparisondiscoloration the response speed number difference, finally mixed itadds to the methyl methacrylate, the peroxidation benzoin formyl in the plexiglass, tested 6 '- the nitryl yinduolin spiralbenzene and pinan in the glass fatigue resistance, thethermostability.

实验过程：由苯肼和3-甲基-2-丁酮合成腙；再冰醋酸催化生成2 ，3 ，3—三甲基—3H—吲哚；再经过碘甲烷发生烷基化反应生成吲哚碘化物；碘化物在NaOH下脱去一分子HI成为费歇尔碱；在乙醇为溶剂下加5－硝基水杨醛与其反应最后生成6'—硝基吲哚啉螺苯并吡喃；通过红外光谱和元素分析确证其结构，并研究了环体与开环体的光致变色性能，解释了在不同溶剂介质中紫外吸收光谱的溶剂效应，并比较褪色反应速率数的差异，最后将其掺加到甲基丙烯酸甲酯，过氧化二苯甲酰有机玻璃中，测试6'—硝基吲哚啉螺苯并吡喃在玻璃中的抗疲劳性、热稳定性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。