查询词典 butyl

Methyl tertiary butyl ether is a new gasoline additive, which is used to increase the combustion of gasoline and to reduce the emission of harmful exhausts from automobile.

甲基叔丁基醚是一种新型的汽油添加剂，被用来提高汽油燃烧效率，减少汽车尾气中有害物质的排放。

Environmental Protection Office of the State of New York on the 22nd release of the study found that, although in 2004 in New York have banned the use of methyl tert-butyl ether, but the pollution remains a threat to drinking water supply to Long Island aquifer.

环境保护的纽约州办事处对22日公布的研究发现，虽然在2004年在纽约已禁止使用甲基叔丁基醚，但污染仍然是饮用水供应构成长期的威胁岛的含水层。

Objective To investigate the effects of methyl tertiary butyl ether on the FOS protein in central nervous system of the rats. Methods 54 SD healthy adult-rats weighed 180~220g were involved in this study.

目的 通过研究甲基叔丁基醚对大鼠中枢神经系统Fos蛋白的影响，探讨MTBE对中枢神经系统急性毒作用部位。

Oxidation of methyl tert-butyl ether, a common additive to gasoline,which is one of organic pollutants in the environment, was investigated. Based on the ozonation mechanism of MTBE,the oxidation properties and the intermediates were investigated.

文章针对汽油添加剂甲基叔丁基醚对环境日益严重的污染问题，在臭氧氧化MTBE反应机理研究的基础上，对反应特性及其中间产物进行了研究。

Methyl tert-butyl ether; determination ; gas chromatography ; ambient air

甲基叔丁基醚；测定；气相色谱；环境空气

Synthetic nitro-musks are used in the most wide area recently and industrial crystallization is the most important process to separate solid mixtures such as perfumes. In order to develop new crystallization process to separate synthetic nitro- musks, the phase equilibrium of musk ketone, musk xylene and 1,3-dimethyl-2, 4- dinitro-5-tert- butyl benzene were studied.

合成硝基麝香是用量最大的合成麝香而工业结晶是分离香料等固体产品的重要方法，为了开发麝香体系结晶分离新工艺，本文首先研究了酮麝香、二甲苯麝香和1，3-二甲基-2，4-二硝基-5-叔丁基苯的相平衡关系。

The calculated results indicated that the HOMO and LUMO of the 2, 7-linked and 3, 6-linked carbazole trimers are both slightly destabilized on going from methyl substitution to sec-butyl substitution.

计算结果表明：2，7-和3，6-咔唑三聚物的HOMO和LUMO由甲基取代到仲丁基取代逐渐变的不稳定。

The results showed that over 500.0 μg/L of Jagged-1/Fc led to the obvious enhancement of the proportion of CD4+CD25+ T cells within the day 4 to 6 of induction, which was abrogated with an anti-Jagged-1/Fc monoclonal antibody. This induction action of Jagged-1/Fc on CD4+CD25+ T cells was also inhibited by the block of a Notch signal pathway with N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester. The level of IL-4 and IL-10 in the supernatant of T cell culture and their intracellular level were elevated by the induction of Jagged-1/Fc,and the level of TGF-β1 in the supernatant was not altered.

结果显示，超过500.0 μg/L剂量的Jagged-1/Fc使CD4+CD25+ T细胞百分比明显增高，诱导时间需要4～6天，抗Jagged-1单抗能抵消Jagged-1/Fc的诱导作用，用DAPT阻断Notch信号通路的活化也能抑制Jagged-1/Fc的诱导作用，Jagged-1/Fc诱导分化的T细胞培养上清中IL-4和IL-10的水平明显增高，TGF-β1无明显变化，胞内IL-4，IL-10，IL-2和TNF-α的水平也呈增高趋势。

We aim to investigate the effect of adding t-butyl groups substituents to unsymmetrical Zn-Porphyrins used for the preparation of dye sensitised solar cells.

本论文研究之紫质的分子结构与自然界中参与光合作用的叶绿素相近，其衍生物具有相当优异的光电转换特性，因此近年来人工紫质在染料敏化太阳能电池的研究中扮演重要的角色。

The mainly related brands are henkel wacker of Germany , scapa of Britain , 3M dowcorning momentive of America , shinetsu nitto of Japan ＆ all kinds of butyl products self-developed ,as well as the related equipments.

主要涉及的品牌有：德国的henkel wacker ；英国的scapa 美国的3M dowcorning momentive日本的shinetsu nitto以及自主研发的各种丁基产品等。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。