查询词典 benzene

In this paper, using Liaonings Ca-bentonite as matrices, modifying with sodium compound at first, organically modifying with Octadecyl/Hexadecyl ammonium chloride as the cover agent, based on hydrothermal process, and dispersing the modified bentonite into the dimethyl benzene-methyl alcohol system fully, we synthesized the high-grade organic bentonite gel with stable quality and excellent characteristics.

本文以辽宁钙基膨润土为原料，首先对其钠化提纯，然后以十八／十六烷基氯化铵为有机复合剂，采用水热合成技术对膨润土进行有机改性，将改性膨润土充分分散于二甲苯-甲醇体系中制备出产品质量稳定、性能国内领先的膨润土高档有机凝胶矿物材料。

The contents of the method are as follows: addition of entainer such as benzene, hexahydrobenzene and pentene etc, rectification make entainer, alcohol and water form ternary boiling material, then boiling point difference formed and high purity alcohol finally produced.

采用向酒精溶液添加夹带剂进行精馏，使夹带剂、乙醇、水形成三元共沸物，造成沸点差，从而精馏出纯度高的酒精。

When 45% methanol solution containing 0.5 mmol/L hexamethylene tetraamine was used as the pump carrier, the pump flow rate and output pressure achieved 0.58 mL/min and 0.79 MPa at 4950 V, respectively. By using the pump carrier as the mobile phase, benzene and naphthanlene were separated on baseline by the EFA system.

在4950 V的外加电压下，以含0.5 mmol/L六亚甲基四胺的45%甲醇溶液为泵载流，电渗泵的流量和输出压强分别为0.58 mL/min和0.79 MPa，以泵载流为流动相，该系统对苯和萘进行了反相色谱分离。

Three major metabolites were identified as 3-OH-HBP,γ-OH-HBP and a hydroxylate on its benzene ring.

确认了芹菜甲素在肝微粒体中三个主要代谢产物及三个次要代谢产物。

However, the 3-and γ-positions were found to be the active metobolism sites either in vitro or in vivo, while no hydroxylate on benzene ring was detected for most of them.

但总的说来，不论在体外，还是在体内转化中，3-位，γ-位是这类化合物代谢的活性位点，而苯环上4-、5-位几乎均未发现有代谢物生成。

Moreover, based on the petrochemical industrial characteristics, this specification has defined benzene piping with a hypertoxicity level of extremely harmful medium as Grade SHB piping and acrylon, carbonyl chloride, carbon disulfide sulphide and hydrogen fluoride piping with a hypertoxicity level of high harmful medium as Grade SHA piping.

此外，根据石化行业的特点，本规范将毒性程度为极度危害介质的苯管道作为 SHB 级管道处理，将毒性程度为高度危害介质的丙烯腈， 48 SH 3501-2002 光气，二硫化碳和氟化氢管道作为 SHA 级管道处理。

From the UV-vis absorption spectra data, we can obtained: a Intruduce a 3-sulfopropyl into thiacyanine makes λ〓 red shift 1nm; b For the anionic thiacyanines, the substituent at the 5-position of the benzene ring has influence on λ〓· Acroding to the sequence F, Cl, CH〓, OCH〓, 4, 5-benzo,λ〓 red shift. Strong electron-withdrawing group CF〓 makes λ〓 hypsochromic shift 1nm.

选取三个系列的15个染料在乳剂中作增感实验，并用摄谱仪测定了乳剂的感色峰，结果表明：吸电子取代基不利于增感，给电子取代基有利于增感；噻菁染料的加入扩大了乳剂的感色范围，弥补了卤化银乳剂在465～505nm范围内感光度的不足。

Heat value relates to lignose content and benzene-ethanol extractive content linearly.(3) Of all the 12 tree species,Schima superba, Castanopsis hystrix, Myrica rubra have the strongest resistance to fire; Machilus pauhoi, Mich elia macclurei, Mytilaria laosensis, Camellia olifera and Manglietia tenuipes are relatively strong in fire-resis tance, and Lithocapus thalassica, Tsoongiodendron odorum, Cunninghamia lanceolata and Pinus massoniana are weak in fire-resistance.

木质素含量和苯-乙醇抽取物与总发热量有线性相关关系；(3)由多目标决策方法对12种树的抗火性能综合排序，木荷、红椎、杨梅的抗火性强，刨花楠、水老排、火力楠、油茶和木莲的抗火性中等，稠木、观光木的抗火能力较弱，杉木、马尾松的抗火能力弱。

Is a research and development, production, trade and service-based economy of foreign trade entities, chemical raw materials to the professional operation of the main company's existing production of AC blowing agent, ferric chloride, hydrated Hydrazine, p-nitrophenol, m-phenylenediamine, phosphorus trichloride, phosphorus oxychloride, 2,4 - diamino benzene sulfonate, sodium dichloro isocyanurate, N-methyl-o-phenylenediamine Second hydrochloride fine chemical products such as the ability, and are obtained ISO9001 international quality system certification.

济南华尔沃进出口贸易有限公司是一家集研发、生产、贸易、服务于一体的外贸型经济实体，以专业经营化工原料为主，公司现有生产AC发泡剂、三氯化铁、水合肼、对硝基苯酚、间苯二胺、三氯化磷、三氯氧磷、2，4—二氨基苯磺酸钠、二氯异氰脲酸钠、N-甲基邻苯二胺二盐酸盐等精细化工产品的能力，并且均以取得ISO9001国际质量体系认证。

In order to control the benzene contents in pump operating room, enhance scientific management of the poisons work in the room and keep the health of workers, we adopt poison work classification method to classify tasks in pump operating room according to different concentration, working time and jeopardous level.

jeopardous reason ；为了控制泵间中苯的危害，加强泵间中苯毒物作业劳动条件的科学管理，保障接触苯毒物作业的员工的身体健康，根据泵间中苯不同浓度、员工作业时间和毒物的危害程度，采用有毒作业分级方法，对苯泵间进行作业分级。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。