三价的

The relationship between their molecular structure and inhibition efficiency was discussed. It shows that the chemisorption of π electrons of benzotriazole derivatives has some effect on their corrosion performance.

苯并三唑的缓蚀作用主要来自BTA分子对一价铜离子的促钝化作用，π电子的化学吸附对其缓蚀性能有一定的影响。

This is the reason that the blue white passivating film is too thin.So,in order to settle the problem,a kind of process to acquire compare thick passivating film,high corrosion resisting WX-3TC trivalent chromium blue white desensitizer and its means were successfu...

为此，在增加蓝白色钝化膜的厚度方面进行了努力，终于研制成功了一种能获得较厚、具有高耐蚀性钝化膜的WX-3TC三价铬蓝白色钝化剂及其钝化工艺，盐雾试验出现白锈的时间可达240h以上，从而解决了蓝白色钝化膜耐腐蚀性差的难题。

So, in order to settle the problem, a kind of process to acquire compare thick passivating film, high corrosion resisting WX-3TC trivalent chromium blue white desensitizer and its means were successful obtained. The white rust appears after 240h in salt spray test, thus the poor corrosion resistance of blue white passivating film can be settled.

为此，在增加蓝白色钝化膜的厚度方面进行了努力，终于研制成功了一种能获得较厚、具有高耐蚀性钝化膜的WX-3TC三价铬蓝白色钝化剂及其钝化工艺，盐雾试验出现白锈的时间可达240h以上，从而解决了蓝白色钝化膜耐腐蚀性差的难题。

Either the amount of reduced chromium or the amount of unreacted dichromate can be measured.

还原生成的三价铬的量或未反应的重铬酸钾的量能被测出。

Based on other linguists' study, this thesis has observed and analyzed the "的" phrase by applying Valance Theory and Three Planes Theory.

本篇论文在学者们研究的基础上，拟运用配价理论及三个平面的理论对其进行考察、分析，通过详尽的描写，力图揭示其语法特征和语法规律。

The fullerol showed a weak RLS spectrum in aqueous solution, but its intensity could be enhanced significantly in the presence of ytterbium to form a stable RLS system.

富勒醇的水溶液表现出弱的共振光散射性质，但是当三价镱离子存在时，它的共振光散射强度显著增强，形成了一种稳定的富勒醇/镱Ⅲ共振光散射体系。

The extraction equilibrium constants of Nd , Eu , Am in the system of seven monoacidic organophosphorus compounds dodecane 1. 0mol/l NO〓are reported. The dependency of the extractability on the PO〓function group、bonding charactor、metallic ion species and the structure of substitute has been examined.

给出了七个烷基磷酸的正十二烷熔液从1.0mol／lNO〓水溶液中萃取Nd、Eu、Am的平衡分配常数Kex，考察了萃取剂PO〓官能团、萃合物成键特性、金属离子及取代基结构与萃取性能间的关系，发现了：（1）可运用取代基自由能加和模型预测辛基膦酸辛基酯对La、Eu、Nd、Am等三价离子的平衡分配数据。

Different plant expression vectors had been respectively transferred into upland cotton cultivars Jinman12, Jinmian7, Xinluzao1 and Jihe321 via Agrobacterium tumfaciens transformation. These vectors carried cryIAc3 gene, which encodes Bacillus thuringiensis δ-endotoxin, under the control of chimeric OM promoter, CaMV 35S promoter, and cotton leaf curl virus RP promoter respectively; snowdrop lectin gene (Galanthus nivals agglutinin, gna) trans-regulated by rolC promoter controlled TGAla factor; and multivalent expression construct of both cryIAc3-cpti fusion gene and gna gene. A large number of transgenic plants and their progenies had been obtained.

为了提高外源基因的表达量，延缓害虫产生耐受性，本文通过将携带有分别在高效复合OM启动子，CaMV35S启动子及棉花曲叶病毒RP启动子控制下的苏云金杆菌杀虫毒蛋白基因cryIAc3；反式调节因子增强韧皮部表达的雪花莲外源凝集素(Galanthus nivals agglutinin，GNA)基因；以及同时含有cryIAc3、豇豆胰蛋白酶抑制剂基因和gna三价抗虫基因的植物表达载体，以根农杆菌介导法分别将这些表达载体导入了陆地棉新陆早1号、晋棉7号、晋棉12号和冀合321等我国西北棉花主要栽培品种，经体细胞胚再生获得了大批转基因再生植株。

Effects of roast temperature, roast time, the amounts of sodium carbonate on decomposition of bastnaesite concentrate and effects of leaching temperature, leaching time, concentration of hydrochloric acid, the amounts of hydrochloric acid on leaching ratio of trivalent rare earth and tetravalent cerium was studied systematically.

系统地研究了焙烧温度、焙烧时间和碳酸钠的加入量对氟碳铈矿精矿焙烧分解的影响及浸出时间、浸出温度、盐酸浓度和盐酸用量对三价稀土和铈的浸出率的影响。

Previous compound technics consumed a lot of dextrin,and in order to depleting the toxicity of iron sorbit ,we need use methanol and ethanol for refining it.

山梨醇铁是三价铁、山梨醇与柠檬酸的胶体络合物，以前的合成工艺消耗大量的糊精，为了降低山梨醇铁的毒性，需要用甲醇和乙醇进行精制。

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。