戊烯

The main downstream products from the industrial dipentene were reviewed,such as:some kinds of polyester,fine chemical intermediates such as p-cymene,p-menthane and flavours such as carvone ,terpinyl acetate and so forth,the main characteristics and applications were also described in the paper.

综述了工业双戊烯主要的下游产品聚酯树脂、精细化工中间体如对伞花烃、对孟烷以及香料如香芹酮，乙酸松油酯等的合成方法及反应条件，介绍了相应产品的主要性质、用途。

METHODS:In vitro,by means of traditional method to compare the enhancement effect of dipentene with azone at difference concentrations in the transdermal absorption of tinidazole.

通过离体小鼠皮肤渗透释药实验，测定含不同浓度双戊烯和氮酮对替硝唑溶液促透效果。

The catalytic performance of copper-nickel oxalate catalysts prepared by concurrent coprecipitation was studied in the gas-phase reaction of p-cymene synthesis by dehydrogenation of industrial dipentene.

研究了并流共沉淀法制备的草酸铜-草酸镍催化剂在工业双戊烯脱氢合成对伞花烃气相反应中的催化性能。

The p-Isopropylbenzoic acid was synthesized by catalytic transfer dehydrogenation with 5% Pd/C using dihydrocumic acid as material and hydrogen offer, industrial dipentene as hydrogen acceptor and solvent, reacted directly under reflux condition.

采用5% Pd/C作为转移氢催化剂，原料二氢枯茗酸为氢给予剂，以工业双戊烯作为氢接受剂和溶剂，合成了对异丙基苯甲酸。

The catalyst has high catalytic activity and excellent stability, both the conversion rate of TAME and the selectivity of isoamylene can be over 99%.

该催化剂具有良好的活性和稳定性，TAME转化率和异戊烯的选择性均超过99%。

In order to produce environment-friendly new formulated gasoline to meet stricter requirement of environmental protection and to supply the data for the development of β zeolite catalyst and the design of reactor,the macrokinetics of TAME liquid-phase synthesis catalyzed by β zeolite was studied,where isoamylene was etherified with methanol.

为了生产有利于环境友好的新配方汽油，以适应环境保护的更高要求，为β沸石分子筛催化剂的开发和反应器的设计提供数据，对异戊烯和甲醇在β沸石分子筛催化剂作用下合成TAME液相醚化反应的宏观动力学进行了研究。

The etherification reaction of methanol and isoamylene was investigated in an internal recycle gradientless reaction with an ion exchange resin (NKC-9) as catalyst.

采用国产大孔磺酸树脂(NKC-9)，在无梯度反应器内对异戊烯与甲醇醚化反应进行了研究。

And the low frequency vibrations contribution from ring A and oxygens to the internal reorganization energy of MQ〓(n=1～7) is greater than 1.60kJ.mol〓 in addition, the low frequency vibrations contribution from the isoamylene substituent to the internal reorganization energy of MQ〓 and MQ〓 is about 2.0kJ〓.

得电子前后，环A及对位氧的二面角变化对质体醌MQ〓(n=1～7)的内重组能的贡献大于1.60kJ.mol〓，而且得电子前后，异戊烯支链结构参数的变化尤其是二面角的变化对MQ〓／MQ〓及 MQ〓/MQ〓体系的内重组能贡献约为2.0kJ-mol〓。

The diastereo-selective lactones 57～58 was obtained by the polyfluoroalkyl -lactonization of S--2-methyl-4-pentenoic acid under the reaction conditions mentioned above.

以S--2-甲基-4-戊烯酸进行上述内酯化反应，可得到具有立体选择性的产物57a，57b，58a，58b。

We immobilized carbonic anhydrase onto the surface of membrane oxygenator of polymethyl pentene to enhance the removal of carbon dioxide in blood by two steps.

采用两步法将碳酸酐酶共价键合在聚甲基戊烯(Polymethyl-pentene， PMP)膜式氧合器表面以提高其清除血液中CO2的能力。

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。