查询词典 ethyl

Rubber —material that is capable of recovering from large deformations quickly and forcibly, and can be, or already is, modified to a state in which it is essentially insoluble in boiling solvent, such as benzene, methyl ethyl ketone, or ethanol-toluene azeotrope.

以上就是该标准对于橡胶的定义。从这个定义包含两层含义：（1）是说明了橡胶材料的力学特征——能够从大变形迅速而强烈的回复；（2）是说明了橡胶可以被改性到不溶解、可溶胀的状态——能够被改性至一种不能被沸腾溶剂（如苯、甲基乙基酮、乙醇-甲苯共沸物）溶解的状态。

Application of reverse micella enzyme system in oil industry;2. Synthesis of ethyl oleate catalyzed by Lipex lipase in AOT/isooctane reverse micella r system was studied.

在二-(2-乙基己基)琥珀酸酯磺酸钠和异辛烷构建的逆胶束体系中，以Lipex脂肪酶为催化剂，合成了油酸乙酯，考察了各影响因素对其产率的影响，并进行了脂肪酶紫外荧光检测和体系粒度分析。

In this thesis, the design, synthesis and application of substituted 1,8-naphthalimides and napthopyrones conjugated with uridine, substituted 1,3,5-triazine, 1,2-dibromoethane, ethyl bromoacetate have been studied.

本论文研究了取代l，8-萘酰亚胺和萘并吡喃酮与尿苷、取代均三嗪、二溴乙烷、溴乙酸乙酯偶合和双l，8-萘酰亚胺之间偶合的设计、合成及应用。

No appreciable difference was found whether the reactive group was the vinyl sulfone or sulfato-ethyl sulfone.

过多的活性基易导致在纤维表面固著，影响向纤维内部扩散而导致提升力下降。

In fact, we had obtained polythiophene films with high quality in BF3 ethyl ether, a kind of solvated Lewis acid. The electric conductivity of the polythiophene film is a bout 100 Scm-1. and the tensile strength is as high as 140 MPa, which is forty percent higher than that of aluminum.

事实上，我们已经从一种Lewis酸催化下的低电位聚合体系—噻吩/三氟化硼乙醚溶液中得到了高质量的聚噻吩薄膜，在降低了的聚合电位下得到的聚合物具有优异的力学及电学性能：拉伸强度达140MPa(比金属铝高40%)，电导率则可达100Scm-1。

In fact, we had obtained polythiophene films with high quality in BF〓-ethyl ether, a kind of solvated Lewis acid. The electric conductivity of the polythiophene film is about 100Scm〓, and the tensile strength is as high as 140Mpa, which is forty percent higher than that of aluminum.

事实上，我们已经从一种Lewis酸催化下的低电位聚合体系-噻吩/三氟化硼乙醚溶液中得到了高质量的聚噻吩薄膜，在降低了的聚合电位下得到的聚合物具有优异的力学及电学性能：拉伸强度达140MPa（比金属铝高40％），电导率则可达100Scm〓。

Then, the prepared PET flakes were immerged into four kinds of food simulants (including n-hexane, 15% ethyl alcohol, 3% acetic acid and water).

而后，分别用4种食品模拟液（正己烷、15%乙醇、3%醋酸和蒸馏水）浸泡制备好的PET薄片。

A method is described for simultaneous analysis of simazine, atrazine, acetochlor, alachlor, prometryne, pyridaben, quizalofop-ethyl residue in strawberry using gas chromatography-mass spectrometry.

建立了气相色谱-质谱法，选择离子技术对草莓中乙草胺、西玛津、哒螨酮、禾草克、阿特拉津、扑草净、甲草胺多残留进行同时检测的方法。

In this dissertation, preparation of polysubstituted ethene and heterocyclic compounds based on 2-hydroxyalkyl phenyl selenides andα-phenylselenopropionic acid reagents were further investigated as follow: Firstly, O-ethyl-O-vinyl phosphonates were prepared in a one-pot, two-step transformation by Mitsunobu reaction of 2-hydroxyalkyl phenyl selenides with monoethyl esters of phosphonic acid in the presence of diethyl azodicarboxylate and triphenyl phosphine (PPh3) followed by oxidation-eliminatio...

中文摘要：本文主要进一步探索了2-羟基烷基苯基硒醚、α-苯硒基丙酸试剂在制备多取代乙烯和杂环化合物反应中的应用，具体研究内容和结果如下：一、在偶氮二羧酸乙酯和三苯膦(PPh3)存在下，苯基-2-羟基烷基硒醚和O-乙基膦酸单酯发生Mitsunobu反应，无需分离和纯化反应中间体，直接使用30 %的双氧水进行氧化-消除反应，提供了&两步、一锅&合成O-乙基-O-乙烯基膦酸酯的新方法，该方法反应条件温和，操作简便，产物收率良好(76-82 %)。

The results of experiment show the glass fiber dealed with by KH550 is notscattered in these solvents such as the water, the component solvent of phenol andtetrachloroethane, and ethyl alcohol solution of KH550, but it is evenly scattered inthe solution of PET, the concentration of which has great effect on the dispersion ofglass fiber. The glass fiber can' t be scattered when the value of consistency is below0.2664g/ml, and 0.75g glass fiber can be scattered in 100ml solution.

本实验通过对玻璃纤维分散的研究发现，玻璃纤维(长 3mm，经 KH550 处理)在水、苯酚/四氯乙烷、KH550 的乙醇溶液中都不能分散，而在 PET 的苯酚/四氯乙烷溶液中能均匀分散，且溶液的浓度对分散性影响很大，当浓度。2664g/ml 时，玻璃纤维不能分散，玻璃纤维在 100ml 浓度为 0.4444g/ml 的溶液(90℃下，PET 的饱和溶液)中的最大分散量为：0.75g。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新