还原

Experimental results showed that the relative average error of the proposed method, the hydrazine hydrate gravimetry and the ammonium chloroplatinate gravimetry is -0.14%~+0.13%,-0.21%~+0.21% and -0.13%~+0.14%, respectively, and the relative standard deviation of three methods is 0.05%~0.08%, 0.11%~0.14% and 0.08%~0.09%, respectively, for Pt content from 37% to 65%. Therefore, the accuracy and precision of the proposed method are almost the same with hydrazine hydrate gravimetry, and are a little better than ammonium chloroplatinate gravimetry. But it is rapid, economic, secure, easy to operate and environmental friendly.

结果表明：测定37%~65%的Pt含量，本法、氯铂酸氨重量法、水合肼还原重量法的相对平均误差分别为-0.14%~+0.13%、-0.21%~+0.21%、-0.13%~+0.14%，相对标准偏差分别为0.05%~0.08%、0.11%~0.14%、0.08%~0.09%，故本法的准确度和精密度与水合肼还原重量法的基本一致，较氯铂酸氨重量法的略好；但本法消解快速、节能、安全，操作简便，对环境污染程度小，适宜推广运用。

This indicates that both the reductive dissolution of ferrihydrite and the reductive desorption of As occurred in the batches incubated with arsenicresistant denitrificator and Asadsorbing ferrihydrite.

这说明，体系中水铁矿的还原性溶解和As的还原性解吸已经发生。

This necessity above the basis is this thesis' exactly purpose. This necessity depending on the act of restoring is not only beneficial to point out and correct mutant mistakes of Confucius teacher image's dissociation, but also beneficial to clear people's mixing understand.we can deoxidate true Confucius in the world.

这种必要性在于还原之举不但有利于指出并纠正孔子教师形象一系列变异的错误，而且有利于澄清人们对其教师形象的模糊认识，还原一个真实的孔子。

Chlororespiring, sulfate-reducing bacterium Desulfovibrio dechloracetivorans strain SF3 is capable of dissimilatively reducing Fe, Cr and Co.

还原脱氯，脱硫细菌Desulfovibrio dechloracetivorans strain SF3可异化还原三价铁，六价铬和三价钴。

Theenvironmental risk of leachate from landfill with different operation modes depend ontheir accumulation amount rather than their sudden concentrations and fraction.(7)The high SRB metabolism activity and the accumulation of metabolitewere the main reasons of in-situ precipitation phenomenon of Cu~(2+) and Zn~(2+) inlandfill refuse in bioreactor landfill. Heavy metals in bioreactor landfill havemechanism of in-situ immobilization controlling by SRB metabolism. Thepredominant SRB in landfill refuse belongs to Desulfovibrio vulgaris sp.

7生物反应器填埋场中较高的SRB代谢活性及其逐步累积的代谢产物硫化物是填埋垃圾中的Cu~(2+)和Zn~(2+)形成硫化物沉淀而发生重金属原位固定现象主要原因，生物反应器填埋场中重金属存在原位固定的硫酸盐还原菌调控机理，初步从形态判断填埋垃圾中的优势硫酸盐还原菌属普通脱硫弧菌属Desulfovibriovulgaris sp。

By considering the effect of different binders,basicity,reduction temperature and time on the compression strength and dezinc degree after reducing,find out the best scheme A1B3C3D3 and get the metallic pellets with higher compression strength and dezinc degree .

通过研究不同粘结剂、碱度、还原温度和还原时间对熟球抗压强度、脱锌率的影响，找出最佳试验方案为A1B3C3D3，得到脱锌率和抗压强度较高的金属化球团。

For pre-selection of iron compounds that ferrous sulfate, ferrous chloride, ferrous fumarate, carbonyl iron, amino acid chelated iron, iron asporotate, fenic chloride and ferric pyrophosphate were added in reconstituted skim milk to undergo in vitro digestion, respectively, and then the selected iron compounds were added in reconstituted whole milk to compare the iron bioavailability by estimating dialyzable ferrous iron, dialyzable total iron, nondialyzable and total ferrous iron, respectively.

取硫酸亚铁、反丁烯二酸亚铁、氯化亚铁、艰基铁、Iron asporotate、Amino acid chelated iron、氯化铁与焦磷酸铁等不同铁剂添加於脱脂还原乳中进行体外消化试验，并筛选生物利用性佳之铁剂分别添加於全脂还原乳中，以可透析二价铁、可透析总铁、未透析二价铁及总二价铁等作为评估之指标。

For pre-selection of iron compounds that ferrous sulfate, ferrous chloride, ferrous fumarate, carbonyl iron, amino acid chelated iron, iron asporotate, fenic chloride and ferric pyrophosphate were added in reconstituted skim milk to undergo in vitro digestion, respectively, and then the selected iron compounds were added in reconstituted whole milk to compare the iron bioavailability by estimating dialyzable ferrous iron, dialyzable total iron, nondialyzable and total ferrous iron, respectively.

取硫酸亚铁、反丁烯二酸亚铁、氯化亚铁、艰基铁、Iron asporotate、Amino acid chelated iron、氯化铁与焦磷酸铁等不同铁剂添加於脱脂还原乳中进行体外消化试验，並筛选生物利用性佳之铁剂分别添加於全脂还原乳中，以可透析二价铁、可透析总铁、未透析二价铁及总二价铁等作为评估之指標。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

Hydroxy-5, 10-dihydrophenophosphazine 10-oxide (1) reacted with SOCl2, and then with MeONa in MeOH to give a methyl phosphinate (2) which can be converted to a dinitro compound 3 (62%) by nitration and the resulting dinitro compound 3 can further be converted to 2, 8-diamino-10-methoxy-5, 10-dihydrophenophosphazine 10-oxide (4, 71%) by hydrogenation over Pd/C (w = 0.05). And the effect of amount of Pd/C (w = 0.05) on the reduction was also studied.

10－羟基－5，10－二氢磷杂吖嗪－10－氧化物（1）经醯氯化、甲基化得到10－甲氧基－5， 10－二氢磷杂吖嗪－10－氧化物（2），2经硝化得到10－甲氧基－2，8－二硝基－5，10－二氢磷杂吖嗪－10－氧化物（3，62%）。3在Pd／C（w = 0.05）存在下，用氢气还原为2，8二氨基－10－甲氧基－5，10－二氢磷杂吖嗪－10－氧化物（4，71%），考察了Pd／C（w = 0.05）用量对氢化还原反应的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。