三价

Chemistry having more than one valence, or having a valence of 3 or higher.

具有一个以上的化合价的，或具有三价或更高价的。

Since xylenol orange interferes to determine some metal ions, such as iron, nickel, the author researched to determine them using EDTA.

6对二甲酚橙有封闭作用的金属离子如三价铁、镍，本文研究了用EDTA法测定它们的方法。

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。

Zinc passivating; Blue white; Trivalent Chromium; High corrosion resistance

锌钝化；蓝白色；三价铬；高耐蚀

Zincate plating ; trivalent chromium ; passivation ; corrosion resistance ; electrochemical behavior

镀锌；三价铬；钝化；耐蚀性能；电化学行为

In part one, the reactions of some active fluorine-containing compounds such as 2, 2-dihydropolyfluoroalkanoic acids and ethyl 2-hydropolyfluoroalkenoates were studied and various fluorine-containing heterocyclic compounds were synthesized. Using 2, 2-dihydropolyfluoroalkanoic acids as the starting material, 4-fluoroalkyl quinolin-2-ols, 2- [ -1-hydropolyfluoro-1-alkenyl] -4H-3, 1-benzoxazin-4-ones, 1-aryl -4, 9-dihydro-3-fluoro-alkyl-1H-pyrazo [3, 4-b] quinolin-4-ones, 5-fluoroalkyl-12H-quin olino [2, 1-b] quinazolin-12-ones, 4-fluoroalkyl-1, 3-dihydro-1, 5-benzodiazepin-2-ones and 4-fluoroalkyl-2H-pyrido [1, 2-a] pyrimidin-2-ones were synthesized through its condensation reaction with anilines, anthranilic acid, N'-aryl-o-aminobenzamides, o-nitro aniline, o-amino pyridine and their derivatives and the subsequent transformations. 5-Fluoroalkyl isoxazolidines, 3-fluoro-3-fluoroalkylisoxazolidino [4, 3-c] quinolin-4-ones, 3-fluoroalkylisoxazolino [4, 3-c] quinolin-4-ones and 2-aryl-3per fluoroacylindoles were synthesized by inter-and intramolecular 1, 3-dipolar cycloaddition of fluorine-containing olefins and nitrones.

第二部分，我们研究了α，α-二氟苄基卤类化合物的亚磺化脱卤反应、产物的转化及全氟烷基亚磺酸盐与芳环化合物的全氟烷基化反应，发现全氟苄基碘或溴及α，α一二氟苄基溴在保险粉等亚磺化脱卤试剂引发下可生成相应的亚磺酸盐；全氟苄基亚磺酸盐与氯气或溴反应可生成全氟苄基磺酰氯或磺酰溴；在烯烃存在下，全氟苄基碘则与烯烃发生加成反应，生成相应的1：1加成产物；在三价醋酸锰的作用下，部分芳香化合物如茴香醚，二甲氧基苯，吡啶，喹啉等可以和过量的全氟烷基亚磺酸盐发生双全氟烷基化反应，反应表现出一定的区域选择性，产率良好。

When phosphine≥〓mol is added to a solution ofL1M in 〓, a strong fluorescence species L1ML is formed and a new off-onprocess is completed.The reaction of L2 with 〓 gives macrocyclic luminescencecomplexes L2M by the π-π interaction of the anthryl groups in the two L2ligands.

对其光物理性能进行研究表明由L1到L1MCu(Ⅰ、Ag、Au荧光被完全猝灭呈现荧光on-off开关现象，金属络合物作为新的荧光分子开关体系以金属离子为受体中心在溶液中对三价磷中性客体呈现off-on开关现象。

A soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process.

一种软质的黄白色三价金属元素，稀土属，能通过离子交换过程从氟碳锑矿或独居石中重新获

In the passivated REBAR electrode surface formed by ORCs the grain observed from AFM examination is composed of γ-Fe〓O〓 and Fe〓O〓 0 At+0.7V, the passive film on REBAR electrode formed by single-step polarization is composed of Fe (Ⅲ oxide highly doped by Fe〓. In some areas, small γ-Fe〓O〓 particals or some polymeric structure which contains dioxy and dihydroxy bridging bonds between the iron atoms may also exist in the other region.

通过AFM实验观察到的钢筋电极经循环电位扫描至+0.7V形成的钝化膜中具有的结晶颗粒主要由γ-Fe〓O〓和Fe〓O〓·yH〓O0 阶跃电位形成的钢筋钝化膜在+0.7V下主要是由掺杂了大量Fe〓的三价铁氧化物构成，在某些微小的区域可能存在γ-Fe〓O〓微晶，而在另外一些区域则具有聚合物膜的结构。

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。

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。