查询词典 ethyl

New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization Facile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that: 1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

本工作的新贡献如下：(1)、球形氯化镁负载后过渡金属催化荆催化乙烯聚合本文将配合物2，3-双(2，6-二异丙基苯亚胺)丁烷二溴化镍(1)和配合物2，6-二[1-(2，4，6-三甲基苯亚胺)乙基]吡啶二氯化铁(2)分别直接负载于经不同热脱醇温度处理的球形氯化镁载体上，研究了氯化镁载体的脱醇温度对负载化后过渡金属催化剂及其聚合物的影响，研究表明： 1、通过对球形MgCl_2·2.56C_2H_5OH载体进行热脱醇处理，可以获得合适机械强度、较高比表面积和较高孔隙度的球形氯化镁载体； 2、BET，XRD，IR，SEM，GPC和DSC研究表明，脱醇温度极大地影响负载后过渡金属催化剂的活性和聚合物的性能。

Company will be completed and put into production new products flame-retardant materials CEPPA 2 - carboxy-phenyl ethyl phenyl DCPP Hypophosphorous and phosphorus dichloride.

公司即将建成并投产的新产品阻燃材料CEPPA 2-羧乙基苯基次磷酸及DCPP苯基二氯化磷。

In this method, ethyl acetale and dichloromethane were used to extract residues with eddy-oscillate method.

用二氯甲烷，采用匀浆法提取，并用安捷伦的C18柱（500 mg；6 mL）进行净化。

The study mainly aims at the optima composition and suitable technological conditions of stearoylbenzoyl-methane--one of theβ- diketone compounds prepared from methyl stearate and phenyl ethyl ketone under alkaline catalysts.

主要研究采用硬脂酸甲酯和苯乙酮在强碱类催化剂作用下制备β二酮化合物之一的硬脂酰苯甲酰甲烷的最佳配方和适宜的工艺条件。

In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是让活泼亚甲基类化合物与溴代苯乙酮发生化学反应，由于溴代苯乙酮是含有羰基的卤代烃结构，它可以发生亲电取代和亲核加成反应，当活泼亚甲基类化合物为乙酰乙酸乙酯和β-二酮时，控制反应条件可以发生单取代和双取代两种产物；当活泼亚甲基类化合物为乙酰乙酰芳胺类化合物来反应时，溴代苯乙酮中的羰基与氨基会发生分子内的关环反应生成吡咯烷-2-酮衍生物，这在以前的研究中是没有发现的。

Professor Bell Ketuo in French Paris had treated 20 cases of high blood fat by dinking three bowls of Yunnan Pu'er Tea every day, after a month, he found the cases reduced the blood fat by 13%, alcohol content in the blood ethyl also reduced, but the ills drank the similar quantity other teas had no change in blood far

法国巴黎贝纳尔贾可托教授曾经给20位血脂肪过高的病人，一天喝三碗云南普洱茶，一个月后，发现病人血液中的脂肪降低了13%，血液中的酒精含量也降低了，而饮同样数量的其它茶的病人血脂肪则无变化。

The velocities of reaction of ethyl acetate with sodium hydroxide in dioxane- water mixture have been determined in seven different temperatures(5°,10°, 15°,20°,25°,30°and 35°).

作者在7具不同温度(5°，10°，15°，20°，25°，30°，35°)下，研究了乙酸乙酯和氢氧化钠在二氧六圜和水的混合溶剂中的反应速度。

Dioxane was selected as solvent. The linear range for methanol was 6-54mg/L for ethanol and ethyl acetate both were 10-90mg/L. The average recovery of them was 99, 36, 101.26% and 101.57% respectively.

在上述色谱条件下，甲醇的线性范围为6-54mg/L，乙醇和乙酸乙酯的线性范围为10-90mg/L；平均加样回收率分别为99.36、10l.26%和101.57%。

It was shown that content of ethyl cellulose should not less than 0.2 g in this experiment; the suitable adding speed of dispersed phase and the speed of stirring are about 25 mL/min and 120 r/min, respectively.

研究表明：对实验所用比例，乙基纤维素的用量应不少于0.2 g，适宜的分散相加入速度为25 mL/min，适宜搅拌速度为120 r/min。

Simultaneously, the study discussed effects of pH, interior oxygen, the consumption of dispersant and complexing agent, the influence of absolute ethyl alcohol bathing on dispersiveness, crystalline grain size, burn complete situation, sample purity , exchange coupling, etc.

利用SmFeO_3和Fe_2O_3在晶粒小于20nm的情况下产生交换耦合作用，得到远高于普通稀土铁氧体的磁性能，包括高矫顽力、高剩磁及高的磁能积，从而使整体的磁性能有大幅度的提高。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。