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Experimental solubilities of terephthalic acid dissolved in N,N-dimethyl propionamide, N,N-diethyl propionamide and N,N-diethyl acetamide were determined in the temperature range of

测定了303.2~363.2K温度范围内,对苯二甲酸在N,N-二甲基丙酰胺、N,N-二乙基丙酰胺和N,N-二乙基乙酰胺中的溶解度。

Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.

为研究紫草萘醌类化合物的细胞毒性作用机制,从新疆软紫草根中分离出四种紫草萘醌类化合物β,β二甲基丙烯酰阿卡宁(1),乙酰阿卡宁(2 ),β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。

Regulation The key control point of fatty acid synthesis is acetyl CoA carboxylase which catalyzes the formation of malonyl CoA.

调节 脂肪酸合成的关键调空点是乙酰-COA 羧化酶,它催化丙二酰-COA 的合成。乙酰-COA 羧化酶受磷酸化作用而失活。

A set of laser monitoring observation system to be used for measure the solubility with a high speed, which is programmed heating apparatus , have designed. The solubility of 1,2-cyclohexanediol were measured in water, methyl acetate, acetic ester, propyl acetate, butyl acetate, methyl acrylate, ethyl acrylate, acetoacetic ester at different temperature.

另外,还建立了一套带激光监视系统,可以控制升温速率的溶解度测定实验装置,测定了反式-1,2-环己二醇在水、乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酰乙酸乙酯、丙烯酸甲酯、丙烯酸乙酯和甲基丙基酮等9个二元体系中的溶解度。

Except heptanoyl chitin, four of them,i.e.acetyl chitin,propionyl chitin,butyryl chitin and hexanoyl chitin,had high degree of substitution(from 1.5 to 2.0)and exhibited lyotropic liquid crystalline behavior and cholesteric phase.

文摘:四种羧酰化甲壳素即乙酰化、丙酰化、丁酰化和己酰化甲壳素在二氯乙酸溶液中均呈现胆甾型溶致液晶相。

The main products are as follows: Pharmaceutical Intermediate, Trimethyl Orthoformate , Triethyl Orthoformate, Sodium Methoxide, Power and solution Ethoxide,α-Chloropropionyl Chloride, Acetyl Chloride. Shandong Xinhua Junli Chemical Co.,Ltd.

公司主要产品为医药中间体,原甲酸三甲酯、原甲酸三乙酯、甲醇钠、乙醇钠、α-氯代丙酰氯、乙酰氯,其中原甲酸三甲酯、原甲酸三乙酯是国内唯一采用金属钠法工艺生产的企业。

Furoin was synthesized from furol with VB1 as the catalyst,which was then reacted with acetyl chloride, lauroyl chloride ,benzoyl chloride,α-furoyl chloride and 3-α-furyl acryloyl chloride,respectively;corresponding monoester compounds of furoin were synthesized in THF in the presence of sodium hydroxide under reflux.

以糠醛为基础原料,经维生素B1催化合成糠偶姻,再由糠偶姻分别和乙酰氯、月桂酰氯、苯甲酰氯、α-呋喃甲酰氯和3-α-呋喃烯丙酰氯反应,在NaOH/无水THF体系中,于水浴回流条件下合成了相对应的糠偶姻单酯类化合物。

In order to supply basic thermodynamic data for the separation design of acetyl acetone from the isomerization reaction of isopropenyl acetate,vapor-liquid equilibrium data of isopropenyl acetate-acetyl acetone system under 101.3 kPa was measured using Ellis equilibrium still.

为了给乙酸异丙烯酯异构化生产乙酰丙酮工艺的产物分离设计提供基础热力学数据,用埃利斯平衡蒸馏器测定了101.3 kPa下乙酸异丙烯酯-乙酰丙酮体系的汽液平衡数据,结果表明,该二元体系未形成共沸物,实验数据通过了Herrington面积法的热力学一致性检验。

The first committed step in fatty acid biosynthesis is the carboxylation of acetyl CoA to form malonyl CoA using CO2 in the form of bicarbonate HCO3-.

在脂肪酸的从头合成过程中,参入脂肪酸链的二碳单位的直接提供者并不是乙酰CoA,而是乙酰CoA的羧化产物——丙二酸单酰CoA(malonyl-CoA)。

The pathway The first committed step in Fatty acid biosynthesis is the carboxylation of acetyl CoA to form malonyl CoA which is catalyzed by the biotin-containing enzyme acetyl CoA carboxylase.

途 径 脂肪酸合成的第一个关键步骤是乙酰-COA 羧基化形成丙二酰单酰 COA ,这一步是在含生物素的酶乙酰-COA 羧化酶的催化下进行的。

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然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

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付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。