Characterization of technetium(vII) reduction by cell suspensions of thermophilic bacteria and archaea.
Appl Microbiol Biotechnol
; 76(2): 467-72, 2007 Aug.
Article
de En
| MEDLINE
| ID: mdl-17619187
ABSTRACT
Washed cell suspensions of the anaerobic hyperthermophilic archaea Thermococcus pacificus and Thermoproteus uzoniensis and the anaerobic thermophilic gram-positive bacteria Thermoterrabacterium ferrireducens and Tepidibacter thalassicus reduced technetium [(99)Tc(VII)], supplied as soluble pertechnetate with molecular hydrogen as an electron donor, forming highly insoluble Tc(IV)-containing grayish-black precipitate. Apart from molecular hydrogen, T. ferrireducens reduced Tc(VII) with lactate, glycerol, and yeast extract as electron donors, and T. thalassicus reduced it with peptone. Scanning electron microscopy and X-ray microanalysis of cell suspensions of T. ferrireducens showed the presence of Tc-containing particles attached to the surfaces of non-lysed cells. This is the first report on the reduction in Tc(VII) by thermophilic microorganisms of the domain Bacteria and by archaea of the phylum Euryarchaeota.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Oxydoréduction
/
Bactéries
/
Technétium
/
Archéobactéries
Langue:
En
Journal:
Appl Microbiol Biotechnol
Année:
2007
Type de document:
Article
Pays d'affiliation:
Russie