查询词典 catalysts

The main species of the antimony catalysts are antimony trioxide, antimony acetate and the recent widely concerned ethylene glycol antimony.

此外，用于酯交换反应的锰、锌、钙、钴、铅等金属的醋酸盐对缩聚反应也有一定的催化作用。

The results show that the thermal degradation process of polystyrene initiates from chain end scission, and styrene dimer is the residual of degradation of polystyrene; Different catalysts have different catalytic activity on the degradation process of polystyrene, among which barium oxide is the best.

作者利用热重质谱法对聚苯乙烯热降解和催化降解过程进行了研究，得出以下结论，聚苯乙烯的热降解过程主要由链端断链反应引发，苯乙烯二聚体可能是聚苯乙烯降解结束阶段的剩余物；不同催化剂在聚苯乙烯降解过程中具有不同的催化活性，其中氧化钡的催化活性最高。

The effect of mesh TiO〓/Ti used to treat rhodamine B and rose bengal was equivalent to that of 0.1～0.3％ TiO〓 suspensions, it indicated that the photoelectrocatalytic oxidation system of mesh TiO〓/Ti could replace the system in above concentration condition basically. The content, which is similar to the result of this study, has not been reported in present domestic and oversea researches of fixed TiO〓 catalysts.

用丝网TiO〓／Ti催化剂光电催化降解若丹明B和虎红，其处理效果相当于TiO〓浓度为0.1-0.3％的悬浆体系，表明以丝网TiO〓／Ti为催化剂的光电催化氧化体系基本上可以代替上述浓度条件下的TiO〓悬浆体系使用，在目前国内外固定态TiO〓催化剂研究中，尚无类似报道。

Benzoyl chloride, phthaloyl dichloride, isophthaloyl dichloride and terephthaloyl dichloride were reacted with cinchona alkaloids to form 16 esters type catalysts 4a-d, 5a-d, 6a-d and 7a-d.

1对于溴乙酰甲酸乙酯为底物的反应，这类以酯键形成的金鸡纳生物碱衍生物表现出的不对称诱导作用不令人满意(22-75%ee)。

For the aerobic oxidation of benzyl alcohol reaction,metallic palladium supported on the SiO_2-Al_2O_3 support was used as catalysts.

研究主要涉及以氧气为氧化剂的苯甲醇选择氧化反应和在惰性气氛中无氢受体存在的条件下的苯甲醇氧化脱氢反应两部分。

In this thesis, the alloys of Pt and Ni were made and used as the cathode catalyst. By the contrast of the two kinds of catalysts electrode kinetic parameters, we find that the exchange current density of cathode doubled.

通过电极动力学参数的比较，发现氧电化还原在合金催化剂上的交换电流密度比Pt／C催化剂上的提高了2倍，减小了氧电极的活化极化，提高了催化剂的抗烧结能力。

By using catalysts based on sodium nitrite, hydrochloric acid and sodium nitrite, cerium dioxide and sodium nitrite, and cupric nitrate and sodium nitrite correspondingly.

结果表明，用亚硝酸钠作催化剂乙醛酸产率为73.9%，盐酸和亚硝酸钠作催化剂时乙醛酸产率为84.6%，二氧化铈和亚硝酸钠作催化剂时乙醛酸产率为80.2%，硝酸铜和亚硝酸钠作催化剂时乙醛酸产率为78.2%。

We found, however, that new catalysts for oxygen reduction could also lead to new chemical means for hydrogen oxidation.

然而，我们发现氧还原新催化剂同时还可以引发新的氢氧化化学反应。

Oxidants such as air and oxygen, chlorine and hypochlorite, hydrogen peroxide, permanganate, ozone, and SO2/O2 have been investigated, both with and without catalysts.

氧化物例如空气和氧气、氯和次氯酸盐、过氧化氢、高锰酸、臭氧，以及 SO2/O2已经被研究，包括添加或不添加催化剂。

The possibility and extent of the goal reactions could be evaluated based on these calculations. The theoretical calculations also provided the basis for the choice of suitable catalysts and reaction conditions. The experimental results have demonstrated that the thermodynamic calculations are correct.

通过计算可判断所研究反应进行的可能性和程度，对催化剂和反应条件的选择提供了理论依据，实验结果也证明了热力学计算的正确性。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。