Seleno-L-methionine is the predominant organic form of selenium in Cupriavidus metallidurans CH34 exposed to selenite or selenate

Article Abstract:

The direct coupling of high-performance liquid chromatography to inductively coupled plasma-mass spectrometry is employed to identify the organic selenium species in Cupriavidus metallidurans CH34 exposed to selenite or selenate. Results indicate that seleno-L-methionine is the accumulated proteinogenic and organic form of selenium in the bacterium, whether it is exposed to selenite [Se(IV)] or selenate [Se(VI)].

Analytical Laboratory Instrument Manufacturing, Analytical instruments, Ion Mass Spectroscopy, Usage, Bacteria, Composition, Mass spectrometry

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Chemical forms of selenium in the metal-resistant bacterium Ralstonia metallidurans CH34 exposed to selenite and selenate

Article Abstract:

The kinetics of selenite and selenate accumulation is studied and X-ray absorption spectroscopy is used to identify the accumulated for of selenate, as well as possible chemical intermediates during the transformation of these two oxyanions. The results suggested that Ralstonia metallidurans CH34 might be suitable for the remediation of selenite-, but not selenate-, contaminated environments.

France, Selenite, Iron bacteria, Metal-reducing bacteria

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Mobilization of selenite by Ralstonia metallidurans CD34

Article Abstract:

Ralstonia metallidurans CH34 can accumulate large amounts of selenium and may be suitable for the bioremediation of soils contaminated with selenium compounds. This organism can grow in soil contaminated by many heavy metals, including cadmium, zinc, copper, lead, nickel, and mercury.

Soils, Bioremediation, Contamination, Selenium compounds

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