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To investigate the growth of the bacterium Escherichia coli during inhomogeneous magnetic field exposure (up to 80 hours, 5.2-6.1 T).
ばく露時間: up to ca. 80 h
|ばく露時間||up to ca. 80 h|
|チャンバの詳細||Incubator maintained at 43°C|
|ばく露装置の詳細||A flask containing bacterial cells was placed in the region where the magnetic field was inhomogeneous which decreased with a maximum gradient of 23 T/m. For control purpose, an incubator was covered with a double-walled cylindrical shell of permalloy to bring the magnetic field lower than the geomagnetic field.|
|磁束密度||5.2 T||minimum||指定なし||-||to 6.1 T|
E. coli was grown aerobically in a fourfold diluted standard medium supplemented with different amounts of glutamic acid at 43°C. Unexposed cultures (i.e. under geomagnetic filed conditions) served as control.
It was found that the cell number in the stationary phase was significantly increased (up to 100.000 times) due to magnetic field exposure at glutamic acid concentration of 1.5 g/L. Also the amount of sigma S factor was increased as determined by western blot analysis.