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钍配合物
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  thorium complexes
     SYNTHESIS AND CHARACTERIZATION OF TETRAAZAMACROCYCLE-N', N" , N'''N""-TETRAACETIC ACIDS AND THEIR URANYL, THORIUM COMPLEXES
     两种四氮杂十四元大环四乙酸配体的铀酰和钍配合物的合成和特性
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  “钍配合物”译为未确定词的双语例句
     STUDY ON SALT OF 3,6-DI-(DIMETHYLAMINO)-DIBENZOPYRIODONIUM THORIUM HEXANITRATE
     3,6-二-〔二甲氨基〕二苯并碘六环六硝酸钍配合物的研究
短句来源
     POLYMERIZATION OF ACETYLENE WITH THORIUM CATALYST SYSTEM
     乙炔在钍配合物催化体系下的聚合
短句来源
     SYNTHESIS,CHARACTERIZATION AND DETERMINATION OF STABILITY CONSTANT OF Th 4+ AND UO 2+ 2 COMPLEXES OF N DIACETIC ACID SUBSTITUTED TETRAAZAMACROCYCLE
     N-二乙酸基取代四氮杂大环与铀、钍配合物的合成、表征及稳定常数的测定
短句来源
     SYNTHESIS OF MACROCYCLIC SCHIFF BASE CONTAINING THIOPHONE RING AND ITS COMPLEXES WITHLANTHANUM AND THORIUM
     含噻吩环大环Schiff碱及其镧、钍配合物的合成
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     It is very important to study the complexes of uranium, thorium and rare earth in the process of extracting and refining nuclear fuel materials, the treatment of radioactive wastes, the production of isotope, the environmental chemistry of nuclides migration, etc.
     铀、钍配合物的研究,对核燃料的提取与分离、乏燃料后处理、放射性核素去污、同位素制备和核素迁移环境化学等都具有十分重要的意义。
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  相似匹配句对
     POLYMERIZATION OF ACETYLENE WITH THORIUM CATALYST SYSTEM
     乙炔在配合物催化体系下的聚合
短句来源
     Synthesis and Characterization of the Solid Complex of Thorium Nitrate with Biuret
     硝酸与缩二脲固体配合物的合成及性质
短句来源
     Isomerism in Complexes
     配合物的异构现象
短句来源
     The stacking naphthylene groups in complexes 3?
     配合物3?
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     Thorium resources and their availability
     资源及其利用
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  thorium complex
Optical and Chromaticity Characteristics of Adsorbates of the Thorium Complex of Arsenazo I
      
The determination method was based on a decrease in the color intensity of the thorium complex of Arsenazo I.
      
The thorium complex shows maximum absorbance at the wave length 520 mΜ, while that of the dye occurs at 430 mΜ.
      
The maximum intensity of colour of the thorium complex is shown at aph 2.5.
      
Spectrophotometric study on the thorium complex of β-SNADNS-6
      
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  thorium complexes
Soluble polysaccharide-thorium complexes were not found, and larger polysaccharide molecules were precipitated in preference to smaller ones.
      
Similarly, the presence of positively charged Th4+ and thorium complexes with sulfate result in relatively high thorium concentrations at a low pH range.
      
Stability constants for thorium complexes with tetracycline were determined by the methods of average number of ligands, the limiting value, the two parameters and by weighted least squares.
      
The mode of decomposition of the cerium and thorium complexes is broadly comparable but the decomposition of Zr complex shows some variation.
      
The Schiff base and its zinc and antimony complexes are strongly active against leukemic cells (CD50 = 2.3-4.3 μg cm-3) while the copper, uranium and thorium complexes are moderately active (CD50 = 6.9-9.5 μg cm-3).
      


A highly selective method has been proposed for determining microamount of thorium by third derivative spectrophotometry, the third derivative absorbance at 663 nm is maxium for the complex of arsenaso Ⅲ-thorium, while that of lanthanum is closed to the baseline, therefore, the third derivative can eliminate the interference from certain amount of lanthanum. A linear calibration curve is obtained in the range of 0~1. 25μg/ml for Th and the amount of coexisting lanthanum is to erable in less than 60μg/ml. This...

A highly selective method has been proposed for determining microamount of thorium by third derivative spectrophotometry, the third derivative absorbance at 663 nm is maxium for the complex of arsenaso Ⅲ-thorium, while that of lanthanum is closed to the baseline, therefore, the third derivative can eliminate the interference from certain amount of lanthanum. A linear calibration curve is obtained in the range of 0~1. 25μg/ml for Th and the amount of coexisting lanthanum is to erable in less than 60μg/ml. This method can be used to determine ppm level of thorium in rocks containing rare earths without prior seperation. The results were in good agreement with the certified values when it was applied to the determination of thorium in some geochemical standard reference samples added 0. 2~0. 5 La and the relative standard deviation for the sample containing 52.4ppm of Th was 1. 99% (n=7).

本文以钍与偶氮胂Ⅲ显色体系为例,用三阶导数零点法作了研究并应用于岩矿中微量钍的测定。60μg/ml以下的稀土其三阶导数吸收线在665nm处通过基线,记录665nm处钍配合物三阶导数吸收值,0~1.25μg/ml成线性关系,存在200倍稀土可不必分离。

The extraction behaviour of U,Th,Zr and Fe with DODBP-(4,4'-dioxaundecanedioyl)bis(3-methyl-5-phenyl-pyrazolone) were stu-died. Their pH1/2 are determined and are smaller than that of the mothercompound PMBP.The composition of extraction adduct determined areUO_2A and ThA_2. According to the IR spectra,it is suggested that the β-diketone group is a chelating group but the coordination of the ether oxygenatoms is different with the metal ions. The possible structures were su-ggested for these two compounds.

报道了DODBP(4,4'-(4.8一二氧杂十一烷二酰)双(1-苯基-3-甲基-5-吡唑啉酮,以H_2A表示)对钍、铀、锆、铁的萃取行为,测定了它们的半萃pH.用双斜率法研究了萃合物的组成,对铀为UO_2A,对钍为ThA_2,根据红外光谱认为β-二酮基团是螯合基团,醚氧原子配位情况则随金属而异,在铀与锆的配合物中参与配位,但在钍配合物中则不参与.讨论了铀与钍这二个八配位的配合物的可能结构。

Three kinds of macrocyclic Schiff base containing thiophone ring and its complexes with lanthanum and thorium synthesed.Their structure were characterited by the elemental analysis,IR and ′ HNMR.

合成了三种新型含噻吩环大环Schiff碱及其中一种 ( 4a)与镧、钍的配合物。它们的结构均经IR、′HNMR和元素分析表征

 
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