异丁

The catalyst includes: supported Ziegler-Natta catalyst of titanium halide compound and organic electron donor compound supported with MgCl2 alcoholate carrier; aluminoxane prepared with trialkyl aluminum and water; and one kind of organic electron donor, such as organosilicon compound R2Si(OCH3)2, where R is phenyl, isopropyl, isobutyl or cyclopentyl.

该催化剂包括，a一种负载型的Ziegler-Natta催化剂，即将卤钛化合物和有机给电子体化合物负载在氯化镁醇合物载体上得到的固体催化剂，b一种通过三烷基铝与水反应而制备得到的铝氧烷和c一种有机电子给体，如有机硅化合物R 2 Si(OCH 3 ) 2 ，其中R为苯基、异丙基、异丁基或环戊基。

The present invention relates to a novel application of CrOx/SBA-15 as a catalyst for oxidative dehydrogenation of isobutane to isobutene.

本发明涉及CrO x /SBA-15作为异丁烷氧化脱氢制备异丁烯催化剂的新用途。

The installation process using slurry line, the introduction of foreign advanced technology, high purity isobutylene and isoprene as raw materials.

该装置采用淤浆法工艺路线，引进国外先进工艺技术，以高纯度的异丁烯和异戊二烯为原料。

Objective To investigate the differential diagnosis value of 1H magnetic resonance spectroscopy (1H-MRS) and (superscript 99m)Tc-methoxy isobutyl isonitrile single photon emission computed tomography on postradiotherapy relapse and radionecrosis. Methods 1H-MRS and SPECT were performed in all 35 cases.

目的 探讨质子磁共振波谱(1H-MRS)和99mTc-甲氧基异丁基异腈单光子发射计算机断层显像对脑肿瘤患者放疗后复发与放射性坏死的鉴别诊断作用。

Three methods are used to prepare molecular imprinted polymers,which include conventional bulk technique or polymerization with ultraviolet initiated in low temperature and polymerization with silica-gel as sacrificial materials. In the polymerization procedure , Sulfamethazine(SM2)and Sulfisoxazole were used as target template molecules, methacrylic acid and 4-vinylpyridine(4-VP) and acrylamide were selected as functional monomers, ethylene glycol dimethacrylate as crosslinker, azobisisobutyronitrile was used as initator.

主要工作如下：首先，以磺胺异噁唑和磺胺二甲嘧啶为模板，分别以4-乙烯基吡啶，甲基丙烯酸，丙烯酰胺为功能单体，以二甲基丙烯酸乙二醇酯为交联剂，偶氮二异丁腈为引发剂，采用了传统方法(60℃恒温水浴)、牺牲硅胶法及低温紫外光聚合法等三种方法合成了一系列的磺胺类药物印迹聚合物。

Among them, 3 strains isolated from yellow water could convert lactic acid into ethanol and most strains isolated from Daqu could convert lactic acid into flavoring compositions such as ethanol, isobutyric acid, caproic acid or isovaleric acid etc.

其中，从黄水和大曲中分离到多种降乳菌，黄水中的3株菌可将乳酸转化为乙醇，大曲中的多数降乳菌可转化乳酸为异丁酸、己酸、异戊酸、乙醇等风味成分。

The controlled/living radical polymerization of methacrylates containing carbazolyl or 1,3,4-oxadiazolyl groups via RAFT polymerization was successfully demonstrated. Functional polymers poly, poly, poly, and poly with hole- or electron-transfer ability were synthesized with cumyl dithiobenzoate as a chain transfer agent and AIBN as an initiator in a benzene solution.

以合成的二硫代苯甲酸酯异丙苯酯为链转移剂、偶氮二异丁腈为引发剂，通过RAFT可控／活性自由基聚合方法成功地合成了侧链上悬垂空穴传输基团或电子传输基团(1，3，4-噁二唑基团)的光电功能聚合物：poly、poly和poly、poly。

In the catalytic tranformation of n-butane, Pd modified silicoaluminate molecular sieves were tested for n-butane's isomerization and dehydroismerization.

考察了硅铝分子筛为基质的双功能催化剂催化丁烷异构化的反应性能及催化丁烷一步异构脱氢反应的可能性，发现丁烷到异丁烯的一步转化无法在这一反应体系十有效实现。

In the catalytic tranformation of n-butane, Pd modified silicoaluminate molecular sieves were tested for n-butane's isomerization and dehydroismerization.

考察了硅铝分子筛为基质的双功能催化剂催化丁烷异构化的反应性能及催化丁烷一步异构脱氢反应的可能性，发现丁烷到异丁烯的一步转化无法在这一反应体系中有效实现。

A four-ball tester was used to evaluate the load carrying and antiwear properties of bismuth dibutyldithiocarbamate,bis-dibutyldithiocarbamates(V7723),sulfurized isobutylene,molybdenum ester non sulfur and phosphorus in a mineral oil respectively and their synergistic effects.

利用四球试验机评价了二丁基二硫代氨基甲酸铋与二丁基二硫代氨基甲酸酯(V7723)、硫化异丁烯和非硫磷钼酸酯添加剂的极压和抗磨性能，以及它们之间的极压和抗磨协同作用。

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。