Complex formation of U(VI) with the amino acid L-threonine and the corresponding phosphate ester O-phospho-L-threonine
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A. Günther
The complex formation of uranium(VI) with L-threonine and O-phospho-L-threonine was studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS). An increase in fluorescence emission intensity and a corresponding red shift of the bands in the spectra compared to the free uranyl cation indicate a complex formation between UO22+ and the non- and phosphorylated amino acid L-threonine. The complex formation constants for a 1:1 and 1:2 complex in the case of L-threonine were determined to be log β111=10.33 ± 0.26 at ionic strength I=0.1 M, log β111=10.25 ± 0.25 and log β122=19.94 ± 0.24 at ionic strength I=0.5 M. The calculated constants of the different 1:1 uranyl complexes with O-phospho-L-threonine are log β131=0.28 ± 0.11, log β121=18.94 ± 0.29 and log β111=15.02 ± 0.23 at I=0.1 M.
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Artikel in diesem Heft
- Experimental study of excitation functions of some proton induced reactions on natTi for beam monitoring purposes
- AMS analysis of 36Cl induced in concrete of accelerator facilities
- Ion exchange studies for the removal of plutonium and americium from organic liquid scintillator waste solution
- The interaction of Desulfovibrio äspöensis DSM 10631T with plutonium
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- Complex formation of U(VI) with the amino acid L-threonine and the corresponding phosphate ester O-phospho-L-threonine
- Thermoanalytical (TG-DTA-DTG) investigations of uranium (VI) and thorium (IV) complexes of o-hydroxy N, N′-dimethylbenzylamine in static air atmosphere
- Studies on protonation and Th(IV) complexation behaviour of dihydroxybenzenes in aqueous 1 M NaClO4 medium
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