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Hexavalent chromium reduction by an actinobacterium ${it Flexivirga alba}$ ST13$$^{rm T}$$ in the family ${it Dermacoccaceae}$

Sugiyama, Tomoyasu*; Sugito, Hironori*; Mamiya, Ko*; Suzuki, Yoshinori*; Ando, Katsuhiko*; Onuki, Toshihiko

An isolated strain ${it Flexivirga alba}$ ST13$$^{rm T}$$ was examined for the reducing activity of hexavalent chromium (Cr(VI)). XANES analysis of the precipitate shows the presence of Cr(OH)$$_{3}$$, indicating the bacterial reduction of Cr(VI) to trivalent chromium (Cr(III)). The bacterial Cr(VI) reduction was more efficient in minimal medium supplemented with molasses than with glucose. These results strongly suggest that the isolate ${it F.alba}$ ST13$$^{rm T}$$ is a novel actinobacterium with Cr(VI) reducing activity that is stimulated by molasses.

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Category:Biotechnology & Applied Microbiology

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