Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens

Verfasser / Beitragende:
[T. Yoshida, Takuo Ozaki, T. Ohnuki, Arokiasamy J. Francis]
Ort, Verlag, Jahr:
2004
Enthalten in:
Radiochimica Acta/International journal for chemical aspects of nuclear science and technology, 92/9-11/2004(2004-11-01), 749-753
Format:
Artikel (online)
ID: 378927108
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024 7 0 |a 10.1524/ract.92.9.749.55003  |2 doi 
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245 0 0 |a Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens  |h [Elektronische Daten]  |c [T. Yoshida, Takuo Ozaki, T. Ohnuki, Arokiasamy J. Francis] 
520 3 |a We investigated the interactions of the Fe(III)-, Eu(III)-, and Hf(IV)-desferrioxamine B (DFO) complexes with the Gram-negative aerobic bacterium Pseudomonas fluorescens. Potentiometric titration of 1:1 Fe(III)-, Eu(III)-, and Hf(IV)-DFO complexes showed that Hf(IV) formed a strong complex with DFO whose stability was comparable to that of the Fe(III)-DFO complex, while Eu(III) formed a weaker one. DFO in a growth medium was not degraded by P. fluorescens. Contact of P. fluorescens cells with the Fe(III)-, Eu(III)-, and Hf(IV)-DFO complexes at pH 4-9 revealed that there was negligible adsorption of Hf(IV) and Fe(III), whereas Eu(III) was dissociated from DFO and was readily adsorbed by the cells. These results suggest that Fe(III) and Hf(IV) form stable complexes with DFO and are not adsorbed by P. fluorescens cells. Europium(III) forms a weaker complex with DFO than Fe(III) and Hf(IV) do and its DFO complex is readily dissociated in the presence of the cells. 
540 |a © 2004 Oldenbourg Wissenschaftsverlag GmbH 
690 7 |a Laboratory techniques, experiments  |2 nationallicence 
690 7 |a Analytical chemistry  |2 nationallicence 
690 7 |a Inorganic chemistry  |2 nationallicence 
700 1 |a Yoshida  |D T.  |4 aut 
700 1 |a Ozaki  |D Takuo  |4 aut 
700 1 |a Ohnuki  |D T.  |4 aut 
700 1 |a Francis  |D Arokiasamy J.  |4 aut 
773 0 |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology  |d Oldenbourg Wissenschaftsverlag GmbH  |g 92/9-11/2004(2004-11-01), 749-753  |x 0033-8230  |q 92:9-11/2004<749  |1 2004  |2 92  |o ract 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Ohnuki  |D T.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Francis  |D Arokiasamy J.  |4 aut 
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