查询词典 catalytic

Based on the experimental results and the work done by other researchers, it was concluded that in the MnOx/GAC catalytic ozonation system the production of O·- or intermediate state manganese species might result in the effective degradation of organic pollutants.

根据试验数据和文献分析，推断在MnOx/GAC多相催化臭氧氧化过程中可能有O·-或者高活性锰中间态的生成。

A novel and general copper/silver catalytic system has been developed for the Conia-ene intramolecular reaction.

1建立了一种新颖的、底物适用范围广的铜/银催化体系来催化Conia-ene分子内环化反应。

A selective and mild PS-DIB/ionic-liquid immobilized 2, 2, 6, 6-tetramethyl-piperidin-4-ol-N-oxyl catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via the iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TeMPO catalyst, 4-(2, 2, 6, 6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from TeMPO and 1, 4-dibromobutane.

将聚苯乙烯树脂先碘化再乙酰基化，制得了负载型二乙酰氧碘苯作为氧化剂。2， 2， 6， 6-四甲基－N-氧自由基哌啶醇与1， 4-二溴丁烷反应生成4-溴丁氧基－2， 2， 6， 6-四甲基－哌啶－1-氧化物，再与N-甲基咪唑发生季铵化反应，生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2， 2， 6， 6-四甲基－N-氧自由基哌啶负载离子液体。

A selective and mild PS-DIB/ionic-liquid immobilized TEMPO catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via Iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TEMPO catalyst, 4-(2,2,6,6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from 2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl and 1,4-dibromobutane.

将聚苯乙烯树脂先碘化再乙酰基化，制得了负载型二乙酰氧碘苯(diacetoxyiodo polystyrene，PS-DIB)作为氧化剂。2，2，6，6-四甲基-N-氧自由基哌啶醇(2，2，6，6-tetramethyl-piperidin-4-ol-N-oxyl，TEMPO)与1，4-二溴丁烷反应生成4-溴丁氧基-2，2，6，6-四甲基-哌啶-1-氧化物，再与N-甲基咪唑发生季铵化反应，生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2，2，6，6-四甲基-N-氧自由基哌啶负载离子液体TEMPO-IL。

It is clear that catalysis with ion exchange resins provides an effective and efficient answer to a number of catalytic problems.

很明显，用离子交换树脂进行催化是解决许多催化问题的一种有效办法。

A series of L-histidine Schiff bases that include Sal-His (H2L^1), Br-Sal-His(H2L^2), NO2-Sal-His (H2L^3) and their Cu complexes were synthesized, and the catalytic behavior of Schiff-base-Cu for the oxidation of β-ionone to 4-oxo-β-ionone as well as the effects of substitutents on these properties were examined.

合成了芳环上含不同取代基的Schiff碱配体（水杨醛缩组氨酸(H2L^1)、5-溴水杨醛缩组氨酸(H2L^2)、5-硝基水杨醛缩组氨酸(H2L^3)及其铜配合物，研究了其作为催化剂应用于催化分子氧氧化β-紫罗兰酮制备4-氧代－β-紫罗兰酮中的行为。

Based on the catalytic oxidation of isatin with potassium iodate catalyzed by nickel in ammonia me dium, a kinetic spectrophotometric method for determining trace nickel in oil was developed and the kinetic condition was studied.

基于氨性介质中镍催化高碘酸钾氧化靛红褪色反应，建立了测定油品中痕量镍的新方法，探讨了其动力学条件。

9 Mol/L～2.9×10~(-7) mol/L ...In this paper, a new kind of adsorptive catalytic voltammetry at carbon paste electrode in the presence of dissolved oxygen was developed. The voltammetric behavior of organic drugs (Nifedipine, Indirubin, Rhein, Hesperidin,Isatin) was studied by the proposed method.

本文首次以碳糊电极为工作电极，以K_2S_2O_8为氧化剂，建立了吸附催化伏安法，测定了有机药物(靛玉红、大黄酸、橙皮苷、靛红)在CPE上的伏安行为，并分别测定了其含量，为有机药物的电化学分析提供了新的途径。

Several catalytic systems have been reported for the direct oxidation of isobutane.

文献中已报道了多种催化剂体系对异丁烷直接氧化制MAA表现出较好的反应活性。

The density of vacant sites on the surface of support has the effect on the dispersion state, surface acidity and catalytic activity of supported niobia catalysts for condensation reaction of isobutylene and isobutyraldehyde.

本工作较深入地描述了负载型铌氧化物催化剂表面相互作用，为深刻认识负载型铌氧化物催化剂酸催化作用和进行高效固体酸催化剂的设计和制备提供了参考依据。

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％。