Hexavalent chromium reduction by an actinobacterium Flexivirga alba ST13^T in the family Dermacoccaceae(ENVIRONMENTAL BIOTECHNOLOGY)
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概要
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An isolated strain Flexivirga alba ST13^T was examined for the reducing activity of hexavalent chromium (Cr(VI)). Strain ST13^T grew in the liquid medium containing 0.33mM Cr(VI) under aerobic cultivation, even though growth was inhibited on agar minimal media containing 0.31 mM Cr(VI). The growth in the liquid medium containing Cr(VI) at 3 mM was severely inhibited, and the concentration of Cr(VI) decreased below the detection limit within 13 days. Most of the Cr(VI) was eliminated from the liquid medium in the log phase and the stationary phase. 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 F. alba ST13^T is a novel actinobacterium with Cr(VI) reducing activity that is stimulated by molasses.
著者
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Suzuki Yoshinori
Advanced Science Research Center Japan Atomic Energy Agency
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Ohnuki Toshihiko
Advanced Sci. Res. Center Japan Atomic Energy Agency
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Mamiya Kho
Graduate School Of Bionics Tokyo University Of Technology
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Ohnuki Toshihiko
Advanted Science Research Center Japan Atomic Energy Agency
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Ando Katsuhiko
Biotechnology Center National Institute Of Technology And Evaluation
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Sugiyama Tomoyasu
Graduate School of Bionics, Tokyo University of Technology
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Sugito Hironori
Graduate School of Bionics, Tokyo University of Technology
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Suzuki Yoshinori
Graduate School of Bionics, Tokyo University of Technology
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Sugito Hironori
Graduate School Of Bionics Tokyo University Of Technology
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Sugiyama Tomoyasu
Graduate School Of Bionics Tokyo University Of Technology
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Suzuki Yoshinori
Graduate School Of Bionics Tokyo University Of Technology
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