查询词典 catalytic

The physical chemistry properties of catalysts were characterized by ICP,XRD and NH_3-TPD,alkylation of p-cresol with isobutylene over β zeolite modified by Mn and Ce was carried out and the catalytic activity of the zeolite was investigated.

用等离子发射光谱、X射线衍射分析和NH3程序升温脱附(NH3-TPD)表征了改性Hβ沸石的物理化学性质，考察了Mn和Ce改性Hβ沸石对对甲酚-异丁烯烷基化反应的催化性能，并探讨了Mn改性Hβ沸石催化下温度、原料摩尔比和空速对烷基化反应的影响。

Isochromatic dye ion-pair;catalytic kinetic method;selenium

等色染料离子对；催化；硒

The catalytic effect of dibutyltin dilaurate on the thermal dissociation of blocked isocyanate crosslinkers was also discussed.

运用DSC，研究了二月桂酸二丁基锡对TDI封闭物解封温度的影响。

The result shows that this catalyst has a high catalytic activity and a good selectivity to isomerization of longifolene.

结果表明，该催化剂对长叶烯的异构化反应有很高的催化活性和较好的选择性。

The catalytic performance of Silicalite-1 was improved by isomorphous substitution of Si with Ti.

这些纳米Silicalite-1的催化行为表明重排反应主要发生在Silicalite-1的外表面和靠近孔口的内表面。

The success of these catalysts prompted others to prepare Ti-containing zeolites by isomorphous substitution using TiCl4 in the gas phase, but their catalytic activity was much lower than that of the Ti-Containing samples prepared by hydrothermal synthesis.

成功的催化剂促使其他准备含钛沸石的同晶替代使用中的四氯化钛气体的阶段，但其催化活性明显低于含钛样品编写的水热合成法。

In the polymerization system,there are two kinds of active centers having higher catalytic activity for isoprene polymerization.

事实表明，该聚合体系中存在着两种过渡金属活性中心，它们按各自的机理进行异戊二烯的聚合。

The experimental results showed that the catalytic activity for the polymerization of isoprene is dominated by the rate constant of absolute propagation in this system.

研究结果表明：该体系催化活性低的主要原因是其绝对增长速度常数太低。

In the meantime, we proposed a mechanism for this catalytic reaction. According to the possible formation of intermediate B, we designed a disubstituted ketene of more function to re-capture the zwitterion.

在同位素标记基础上，我们推测了这个N-甲基咪唑催化的二组分反应可能的机理，并根据此机理设计用一个二取代的烯酮来捕捉N-甲基咪唑和DMAD形成的两性离子。

We will synthesize NO2A, PhNO2A and its dimer structure, and study the stability constants for lanthanides complexes and kinetics in hydrolyzing BNPP. And we also want to understand their differences in catalytic mechanism.

由前人的研究可得知，改变配位子的特性，或许可提高金属错合物对於磷酸酯键的水解效力，因此我们将比较NO2A 及 PhNO2A 对於镧系金属稳定常数，及其镧系金属错合物水解磷酸酯键的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。