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Biodegradation of Eu(III)-citrate complexes by Pseudomonas fluorescens.
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- المؤلفون: Suzuki, Y.1,2 ; Nankawa, T.2; Yoshida, T.2; Ozaki, T.2; Ohnuki, T.2; Francis, A. J.3; Tsushima, S.1; Enokida, Y.4; Yamamoto, I.1
- المصدر:
Journal of Radioanalytical & Nuclear Chemistry. Nov2005, Vol. 266 Issue 2, p199-204. 6p.
- الموضوع:
- معلومة اضافية
- نبذة مختصرة :
We have investigated the structure of Eu(III)-citrate complexes in aqueous solution and their degradability by Pseudomonas fluorescens. Analysis of 1:1, 1:2, and 1:5 Eu(III):citrate solutions at pH 7 by electrospray ionization mass spectrometry (ESI-MS) showed that the 2:2 Eu(III)-citrate complex is the predominant complex species at a low citrate/Eu(III) ratio, while at a high ratio, a 1:2 Eu(III)-citrate complex is formed preferably. Studies on the biodegradation of Eu(III)-citrate complex by P. fluorescens have shown that a 2:2 Eu(III)-citrate complex is resistent to degradation while a 1:2 complex transforms to a 2:2 complex with the degradation of excess citric acid. [ABSTRACT FROM AUTHOR]
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