催化作用

Manganese oxides, especially manganese dioxide, are widely used in the field of battery and catalysis. Its quality is vital to battery performance and catalysis activity. Therefore, it is all-important to prepare the active manganese oxides.

锰氧化物尤其是二氧化锰在电池和催化工业中已得到广泛的应用，其品质对电池的性能和催化剂的活性起着决定性的作用，因此合成高活性的锰氧化物显得非常重要。

Photocatalysis of fuchsine dyestuff wastewater has been carried out by using TiO2-coated palygorskite powder.

以凹凸棒石粉末负载TiO2为催化剂对染料废水进行光催化氧化实验，研究了催化剂的投加量、光照时间以及起始浓度对酸性品红染料废水光降解作用的影响。

Acid catalyst and H + catalysis in the acid catalysts were studied for synthesis of methyl glycolate via coupling of methyl formate and trioxane in a microform high-pressure autoclave(120mL).

在微型高压反应釜中(12 0ml)，考察了酸催化三聚甲醛和甲酸甲酯制备羟基乙酸甲酯的偶联反应，并对酸催化剂中H+的作用进行了研究。

Nicotianamine synthase gene has an important function in the Fe-deficiency response of graminaceous monocots, and it catalyzes substance to nicotianamine which plays an important carrier in the internal transport of Fe(superscript 2+) and other divalent metal ions. Nicotianamine can bind with Fe(superscript 2+) to form Fe(superscript 2+)-NA complex and protect plants from toxicity in acidic soil.

烟酰胺合成酶基因在单子叶禾本科的缺铁胁迫应答反应中起着关键作用，它的催化产物烟酰胺是铁及其他二价金属离子在体内吸收和转运的重要载体，且能与Fe(上标 2+)结合形成Fe(上标 2+)-NA复合物，从而使植物在酸性土壤中免受铁毒害。

By use of the Fischer-Tropsch reaction in a C-H-O system, we discussed the relationships between inorganic CO〓 and some physical chemistry conditions, such as Oxygen flee degree , temperature, pressure, other objects consistency and catalyzer. a when T=200K～2000K, if f〓＞0, the reaction of generating CO〓 will be dominant, CH〓 hardily exists; b when T＞1000K, CH〓 is not propitious to exist, carbon in system almost exists in form of CO〓; c the more pressure, the more CO〓 is propitious to exist; d the more consistency of CO, O〓 and H〓O, the more CO〓 is propitious to exist, the more consistency of H〓, the more CH〓 is propitious to exist.

依据C-H-O体系费托反应的简化模型，讨论了氧逸度、温度、压强、其它物质浓度、催化剂等物理化学条件对无机成因CO〓生成的影响，从理论上讨论了在地质环境中，无机成因CO〓存在的物理化学条件：1在T＝200K～2000K的温度范围内，体系中一旦氧逸度＞0，生成CO〓的反应将占绝对优势，CH〓几乎不可能存在；2T＞1000K时，不利于CH〓形成，使体系中的碳主要以CO〓的形式存在；3体系压强越大，越有利于CO〓的形成；4反应物CO、O〓、H〓O的浓度越高，越有利与CO〓的存在，H〓的浓度高有利于CH〓的形成。5地质成藏作用可以经历很长的地质年代，这足以补偿矿物岩石中的Ni、Mo、Fe、Co、Ru等催化性能的降低及其它动力学条件的不足，使得费托反应可能发生，从而生成无机成因的CO〓和烃类。

The photocatalytic activities were measured with the photocatalytic degradation of heptane.

大气中存在着多种金属氧化物粒子，一些金属氧化物是半导体，在近地层太阳光的作用下具有光催化活性。

In nature, some green algae can produce hydrogen after incubation under anaerobic conditions, during which hydrogenase is synthesized and activated.

自然界中存在于藻类和细菌中的氢酶是高效的催化氢气氧化和质子还原的氧化还原酶，在生物产氢和能量转换过程中发挥着重要的作用。

In nature,some green algae can produce hydrogen after incubation under anaerobic conditions,during which hydrogenase is synthesized and activated.

自然界中存在于藻类和细菌中的氢酶是高效催化氢气氧化和质子还原的氧化还原酶，在生物产氢和能量转换过程中发挥着重要作用。

This wor k deals with the effects ten of bromides and iodobenzene in catalytic hydrogenolysis debenzylation of 2,4,6,8,10,12-Hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane.

研究了溴苯等10种溴化物及碘苯在六苄基六氮杂异伍兹烷催化氢解脱苄中的作用。

OBJECTIVE: To investigate the effect of human telomerase reverse transcriptase in the immortalization of rat cranial neural crest stem cells.

目的：观察人端粒酶催化亚基基因在大鼠颅神经嵴干细胞永生化过程中的作用。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！