查询词典 reduction potential

The Copenhagen Accord reached at the United Nations Climate Change Conference 2009 in Copenhagen through the joint efforts of all parties, reconfirming the consensus reached previously, inheriting the attained achievements, pointing out the right direction, remains the momentums of the global endeavors in tackling climate change, and adheres to the principle of "common and differentiated responsibilities", and makes arrangements for the developed countries to take compulsory emission-reduction measures, and for the developing countries to undertake self-determined reduction.

哥本哈根气候变化大会达成的《哥本哈根协议》在各方共同努力下，锁定共识，传承成果，明确方向，维护了全球应对气候变化大局和坚持&共同但有区别的责任&原则，就发达国家实行强制减排和发展中国家采取自主减缓行动做出了安排。

The paper describes searching for reduction coal blending process for zinc vertical retorting ,proposes a new concept of the reduction coal blending technology,i.

对竖罐炼锌用还原煤的配煤方法进行了探索，提出了竖罐炼锌用还原煤配煤技术的新思路。

There was difference of malnutrition reduction among different minority g roups of Yunnan. However, the NPA aim for malnutrition reduction had not realize d up to 2000. Conclusion: Malnutrition is still a serious health problem in rura l children in Yunnan.

2 0余年来云南省儿童体格发育呈增长趋势，农村5岁以下儿童营养不良呈下降趋势，但下降幅度未达到国家NPA目标，5岁以下儿童营养不良仍是云南省农村儿童的主要健康问题。

In range of 300℃～900℃, all the transition metal oxide catalysts could get high ammonia conversion, during the initial stages of the reaction, the SO〓 conversion is relatively low since the catalysts have not been sulfureted, but it increases gradually and attain constant with rising temperature and time continuance,〓 is better than other catalysts in reactivity and elemental sulfur selectivity; XRD indicates that, in the SO〓-SCR process, stable transition metal sulfide is generated which is very important to SO〓 reduction and transition metal sulfide probably is the active phase of catalyst, further the reduction of SO〓 by H〓 to H〓S is the limiting step of all process, then the activity is somewhat related to its lattice oxygen yet not so notable; XPS indicates that little sulfur on surface exists as S〓 in sulfate, showing that TiO〓 could restrain the generation of sulfate.

对于过渡金属氧化物催化剂的研究发现，在300℃～900℃范围内，不同的催化剂均可获得很高的NH〓转化率，反应初期由于催化剂还未硫化，所以SO〓的转化率较低，随着温度升高和反应时间的延续，SO〓的转化率逐渐升高并达到了稳定值；七种过渡金属氧化物中，以〓对于NH〓还原SO〓反应的活性和选择性最好；XRD结果表明在NH〓-SO〓反应后生成了稳定的硫化物相，硫化物对SO〓的还原过程具有重要作用，催化剂的活性相可能是过渡金属硫化物，而且在硫化物催化剂上进行的H〓还原SO〓生成H〓S的反应是整个过程的速率控制步骤，所以催化剂的活性与其自身的晶格氧的氧化还原能力有一定的联系，但关系不明显；XPS结果表明催化剂表面的硫大部分以过渡金属硫化物的形式存在，只生成少量的S〓，说明TiO〓催化剂能够较好的抑制硫酸盐的生成。

The experiments were carried out chemically pure ZnO and reducing agent CO to study the reduction mechanism of the process. And this reduction is important in other metallurgical processes.

为探索其还原过程的规律，首先采用化学纯ZnO进行CO还原实验，研究还原过程的有关规律，这一还原反应也是其它冶金过程中常见的和十分重要的反应。

Chemically pure elemental Al and CuO powder with an Al mass percentage of 20, 35, 57, 70 and 85 were milled respectively. The ball milled powders were analyzed by X-ray diffractometry and differential scanning calorimetry. When the amount of Al was under 20%, the reduction occurred only. When the amount of Al exceeded 20%, besides reduction, the synthesis reaction occurred simultaneously.

对Al含量在20%～85%范围内的Al/CuO进行高能球磨，采用X射线衍射进行物相分析，并对Al含量分别为20%和75%的试验分析了物相随研磨时间的变化，做了差示扫描量热分析，对比研究了固态还原反应与固态复合反应过程的异同。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

The results indicate that the drag reduction and heat transfer reduction of drag-reducing fluid increase with increasing flow velocity and approach the asymptotes, and HTR is greater than DR all the time.

结果表明，减阻流体的减阻率和传热降低率随流速的增大逐渐增大到渐进值，而且传热降低率恒大于减阻率。

Part Ⅰ The Research of Chiral Phosphorus Catalysts in the Enantioselective Borane Reduction of Prochiral Ketones ABSTRACT In this paper, the preparation of varied types of chiral phosphorus ligands and their applications as catalysts in the asymmetric borane reduction of prochiral ketones were investigated.

第一部分对映选择的潜手性酮的硼烷还原反应中手性磷催化剂的研究本文研究了多种不同类型的手性磷配体催化剂的合成及其在酮的不对称硼烷还原反应中的应用。

In the reduction of 1, 6-diphenyl-1, 6-hexanedione catalyzed by the bis-squaryl proline, good enantioselectivities were obtained, the ee values were up to 90%.We also studied the asymmetric borane reduction of prochiral ketone catalyzed by a series of thiazolidine ligands.

本文考察了由L-半胱氨酸衍生的2-位无取代基的以及2-位芳基取代的噻唑烷酸及醇配体在前手性酮的不对称还原反应中的催化性能。

We stopped by the old fashion ice cream parlor Manhattan Beach Creamery for some refreshment. The "No Shoes, No Shirt, No Problem" sign on the wall epitomizes the beach lifestyle.

我们去商店区的一家老式冰淇淋店坐坐，墙上挂著「没鞋，没上衣，没问题」的牌子完全捕捉了海滩生活的随性及风格。

"If therefore", argues Bellarmine we can offer our prayers and our satisfactions in behalf of those detained in purgatory, because we are members of the great body of Christ, why may not the Vicar of Christ apply to the same souls the superabundant satisfaction of Christ and his saints--of which he is the dispenser?

" "因此，如果"，认为贝拉明（德indulgentiis ，十四）"我们可以提供我们的祈祷和我们满意的代表那些被拘留在炼狱，因为我们是成员的伟大基督的奥体，为什麼可能不是牧师基督适用於同样的灵魂满意的过剩是耶稣和他的圣人-他是在配药？