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Effect of high magnetic field on the growth of Bacillus subtilis measured in a newly developed superconducting magnet biosystem by Kazuhiro Nakamura; Kazumasa Okuno; Takashi Ano; Makoto Shoda is a Engineering article available to read on EtoBox.

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A new superconducting magnet biosystem (SBS) has been developed, which can provide a magnetic field of OS-7 T, where biological reactions can be conducted under temperature-controlled conditions. The aerobic growth of a bacterium, Bacillus subrilis MI1 13, was investigated under homogeneous (7 T) and inhomogeneous W-6.1 T) magnetic fields in a shaken culture. In the stationary phase, the cell number in an inhomogeneous magnetic field was about twofold higher than that of the reference, indicating that the magnitude of the decrease in the cell number was reduced by the high magnetic field. The slower decline in the cell number in a magnetic field was due to tbe slower death rate of the vegetative cells. The Inhibition of spore formation from vegetative cells was also observed in a magnetic field, which was reflected by the reduced activity of alkaline phosphatase. Genetically transformed B. subtilis MI1 13 (pC112) produced a higher concentration of a iipopeptide antibiotic, surfactin, in the stationary phase in an inhomogeneous magnetic field due to the higher cell numbs. of the transformant in the magnetic field. 0 1997 Elsevier Science S.A.

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Author

Kazuhiro Nakamura; Kazumasa Okuno; Takashi Ano; Makoto Shoda

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1567-5394)

Published

1997

Language

EN

Field

Engineering (Physical Sciences)