还原剂

In the system of surfactant with ethoxyl groups, it is believed that ethoxyl groups can form hydroperoxides, and these hydroperoxides endow the surfactant the ability of reduction.

实际上，在许多体系中，有机试剂具有同时作为还原剂、稳定剂和反应介质的功效，在这些物质的存在下， Ag＋很容易被还原成金属 Ag。

The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

In the serum bottle fermentation,potassium ferricyanide and dithiothreitol which did not have inhibition on fermentation,were selected as the oxidizing agent and reducing agent respectively.

在血清瓶发酵培养过程中，筛选出对发酵过程无抑制作用的氧化剂铁氰化钾和还原剂二硫苏糖醇作为发酵体系的氧化还原电位调节剂。

The testing results showed that the optimal reduction conditions are 1320℃ for 120 min and the proportional mass fractions of activated carbon powder and the additive A are 3% and 5%, respectively. The additive A accelerates the aggregation of metallic grains so as to make the enriched metallic grains easier for magnetic separation. The mass fraction of maximum nickel in ferronickel alloy and nickel recovery in the laterite-nickel ore are 8.31% and 95.44%, respectively. Metallic nickel is thus enriched.

研究结果表明，最佳反应条件：还原温度为1320℃，还原时间为120min，还原剂与添加剂的质量分数分别为3%及5%；添加剂可促进金属晶粒的聚集，富集的金属晶粒更易于磁选分离；还原产品镍铁合金中镍的质量分数可达8.31%，矿石中镍的回收率可达95.44%，金属镍得到了富集。

The optimum process conditions of treating chromium-contained wastewater with low concentration and the optimum reflux rate of settled bottom stream of flocculate are obtained.

以长沙铬盐厂的含铬废水为试验水样，研究了用七水硫酸铁、亚硫酸氢钠、铁屑 3种还原剂达标处理较低浓度含铬废水的适宜工艺条件和悬浮液絮凝体沉降底流的最佳回流率。

Thermodynamic process of direct aluminium extraction from aluminium sub-sulphide, which is unstable and easily decomposed into Al and Al2O3 at a low temperature, was analytically studied. The temperature, at which alumina, FeS and carbon react to form aluminium sub-sulphide in different pressure, was evaluated with "Substance Gibbs' Free Energy Functional Determinant" method.

本文利用铝的低价硫化物在高温下存在，低温下不稳定容易分解得到金属铝的特性，从热力学角度引入"物质吉布斯自由能函数法"讨论在不同压力下，氧化铝、硫化亚铁与还原剂碳的反应生成低价硫化物的条件。

The test to smelt 75% FeSi in 1800kVA electric furnace has been done to replace smelter coke and steel cuttings by coke of medium caking property and high volatile, iron ore concentrate and ganister powder asraw material.

铁硅；冶金焦；还原剂；比电阻；化学成分；硅铁；中等粘结性高挥发分煤和铁精矿、硅石粉做原料炼出的铁硅焦代替冶金焦和钢屑，在1800kVA铁合金电炉上进行了冶炼75硅铁的试验。

In order to make use of pig blood sufficiently and provide colorant which possesses excellent color and is rich in nutrition for meat products, hemoglobin solution was seperated from fresh pig blood and semidry solid nitrosohemoglobin was prepared with vitamin C as reducer and sodium nitrite as color fixatives and the preparation of hemachrome is not necessary.

为了充分利用猪血资源，并为肉制品提供色泽优良、富于营养的着色剂，该试验以新鲜猪血为原料，分离得到血红蛋白溶液后，不必先制备血红素，而以维生素C作还原剂，亚硝酸钠作发色剂，直接制备半干固体亚硝基血红蛋白。

Carbon hollow nanosphers were synthesized at 200oC, using magnesium and hexachloroethane as reactants, aluminum chloride as catalyst and benzene as solvent.

采用格氏试剂法，在温度200℃，反应时间12个小时下，以六氯乙烷为原料，苯为溶剂，铝作还原剂，无水氯化铝为路易斯酸。

The SHS was carried out using NaN3 as a reducer; and poly (C2F4), hexachloroethane (C2Cl6) and hexachlorobenzene (C6Cl6) as three various oxidizers.

采用还原剂NaN3和三种不同氧化剂－聚四氟乙烯、六氯乙烷和六氯苯，实施了SHS制备。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。