查询词典 ether

In this study, the vapour–liquid equilibria behaviour of the binary systems dipropyl ether + 2-ethoxyethanol and 1-propyl alcohol + 2-ethoxyethanol and the ternary system dipropyl ether + 1-propyl alcohol + 2-ethoxyethanol was experimentally investigated with the aim of testing the feasibility of using 2-ethoxyethanol as an entrainer to the extractive distillation.

本文研究了2种二元体系（1：二丙醚+ 2-乙氧基乙醇；2：1-丙醇+ 2-乙氧基乙醇）和1种三元体系（二丙醚+ 1－丙醇+ 2-乙氧基乙醇）和的气液平衡行为，旨在测试2－乙氧基乙醇是否适合作为萃取性蒸馏的共溶剂。

The formation of charge transfer complex was studied in the first part. The second part includes the synthesis and characterization of the acrylated unsaturated polyester and the kinetic studies on the Ar-UPE/ triethylene divinyl ether (DVE-3) photocuring system, the rheology and properties of film after photocuring. The third part includes the synthesis and characterization of the urethane modified unsaturated polyester and the kinetic studies on the PU-UPE/DVE-3 photocuring system, the rheology and properties of film after photocuring. The fourth part includes the synthesis and characterization of the vinyl ether end capped polyurethane and the kinetic studies on the VE-PU/DVE3 photocuring system, the rheology and properties of film after photocuring.

整个研究工作分为四个部分：一是电荷转移复合物的研究；二是丙烯酰氧基化不饱和聚酯的合成，表征，Ar-UPE/二缩乙二醇二乙烯基醚（DVE-3）体系光固化动力学研究以及Ar-UPE/DVE-3体系流变性能和光固化后涂膜综合性能的研究；三是氨酯改性的不饱和聚酯的合成，表征，PU-UPE/DVE-3体系光固化动力学研究以及该体系光固化后涂膜综合性能的研究；四是乙烯基醚封端的聚氨酯的合成，表征，VE-PU/马来酸二甲酯体系光固化动力学研究以及VE-PU/DMA体系流变性能和光固化后涂膜综合性能的研究。

The glycidol is protected by ethyl vinyl ether first to form 2,3-epoxypropyl-1-ethoxyethyl ether, then polymerized or copolymerized with EO by initiation with the mixture of diphenylmethylpotassium and triethylene glycol to give the well-defined poly.

得到的聚合物用甲酸水解去保护，并在二氧六环和甲醇的混合溶剂中用氢氧化钾溶液皂化后，得到了聚合物链的侧端挂有羟甲基官能团的线形聚醚linear Polyglycidol和poly。

The process of preparing NCAGE included the following steps: alkalization of the treated cellulose; etherification of the alkali cellulose; nitration of the water-soluble cellulose ether; and azidation of nitrocellulose glycidol ether.

利用高压蒸汽闪爆处理后的Novel纤维素为原料，经过碱化、醚化、硝化和叠氮化反应，得到了一种新型高能粘合剂——硝化纤维素叠氮甘油醚，并采用元素分析、DSC、FIT红外光谱和X-射线等对其含氮量、结构和性能进行了分析表征。

With rapid development of internal fixator manufacture, materials for interspinous process device become increasing, such as bone allograft, titanium, poly (ether-ether-ketone) and lactoprene composite.

随着内固定器制作工艺的飞速发展，腰椎棘突间内固定器的材料构成范围也很广泛，包括同种异体骨移植物、钛、聚醚醚酮和人造橡胶复合物等。

The change of the flash point of the mixed trivalent alcohol and the mixed trivalent ether and the mixed alcohol -ether has been studied in this paper by the open crucible flash point mensural apparatus,the experiential formula in fixed condition are projected,and the change regularity of the flash point of the mixed liquid are figured in this paper.

利用开杯闪点测定仪对三元醇类混合、三元醚类混合、醇醚混合等不同情况下混合液体的闪点变化进行了实验研究，推算出了三元混合液体在规定实验条件下闪点变化的经验公式，并用图示法分析了混合液体闪点随配比的变化规律。

The free fatty acids were extracted with petroleum ether and were separated on silicon gel column chromatography. The ethyl acetate-soluble lipid fraction and water-soluble lipid fraction were subjected to hydrochloric acid-catalyzed methanolysis, then were extracted with petroleum ether, respectively.

用石油醚提取低极性组分，经硅胶柱层析分离得到游离脂肪酸；用乙酸乙酯提取酯溶性神经酰胺及其衍生脂类，提取物和残余的水溶性脂类分别经盐酸甲醇解，水解产物再用石油醚提取。

They were Pinosylvin, pinosylvin monomethyl ether and pinosylvin dimethyl ether. PSD was only found in part of the samples where was low in concentration.

在抗腐朽的木材心材样品中，总二苯乙烯类物质的平均含量为7.43mg/g(试验林1)和5.10mg/g(试验林2)；在易腐朽的心材样品中的含量为6.30mg/g(试验林1)和4.77mg/g(试验林2)。

The process of esterification of propylene glycol monomethyl ether with acetic acid to synthesize propylene glycol monomethyl ether acetate is investigated using 98% sulfuric acid as catalyst.

研究了以浓硫酸为催化剂，丙二醇甲醚和醋酸酯化合成丙二醇甲醚醋酸酯的过程，考察了醚和酸比例、催化剂用量等因素对反应的影响，并选择甲苯为水萃取剂。

From the experiment discovered for the first time the dimethyl ether may substitute CO to take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and optimized the CH_3OCH_3-NO-HO_2 chemistry amplifying system determination condition, the CH_3OCH_3 best density is 1.876 ppmv, the NO best density is 1.3ppmv, and obtained this method chain length CL=124, 5 parallel determinations densities of HO_2 are the 44.0pptv, the relatively standard deviation is smaller than 4%; Although chemistry box model computed result indicated the dimethyl ether, the ethene, the propene and the ethanol all can take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and their simulation chain length all grows up compared to the CO-NO-HO_2 chemistry amplifying systems, but experiments proved the ethene, the propene and the ethanol have not suit the chain-carrying agents.

首次从实验上发现二甲醚可以替代CO作为过氧自由基化学放大系统的链传递试剂，并优化了CH_3OCH_3-NO-HO_2化学放大系统的测定条件，CH_3OCH_3的最佳浓度是1876ppmv，NO的最佳浓度为1.3ppmv，并得到了这一方法的链反应长度(CL=124)，5次平行测定浓度为44.0pptv的HO_2自由基，相对标准偏差＜4％；虽然化学盒子模式计算结果表明二甲醚、乙烯、丙烯和乙醇都能作为过氧自由基化学放大系统的链传递试剂，并且它们的模拟链长都比CO-NO-HO_2化学放大体系的链长大，但是实验证明乙烯、丙烯和乙醇不适合作为过氧自由基化学放大系统的链传递试剂。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。