caa a22 4500 378927108 CHVBK 20180305123620.0 cr unu---uuuuu 161128e20041101xx s 000 0 eng 10.1524/ract.92.9.749.55003 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.9.749.55003 Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens [Elektronische Daten] [T. Yoshida, Takuo Ozaki, T. Ohnuki, Arokiasamy J. Francis] 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. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Yoshida T. aut Ozaki Takuo aut Ohnuki T. aut Francis Arokiasamy J. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 749-753 0033-8230 92:9-11/2004<749 2004 92 ract https://doi.org/10.1524/ract.92.9.749.55003 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.9.749.55003 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yoshida T. aut NATIONALLICENCE 700 1- Ozaki Takuo aut NATIONALLICENCE 700 1- Ohnuki T. aut NATIONALLICENCE 700 1- Francis Arokiasamy J. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 749-753 0033-8230 92:9-11/2004<749 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter