研究のタイプ: 医学/生物学の研究 (experimental study)

[大腸菌の死抑制への高磁界効果] med./bio.

Drastic high magnetic field effect on suppression of Escherichia coli death.

掲載誌: Bioelectrochemistry 2001; 53 (2): 149-153

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研究目的(著者による)

To investigate the growth of the bacterium Escherichia coli during inhomogeneous magnetic field exposure (up to 80 hours, 5.2-6.1 T).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1:
  • DC/static
ばく露時間: up to ca. 80 h

ばく露1

主たる特性
周波数
  • DC/static
タイプ
  • magnetic field
ばく露時間 up to ca. 80 h
ばく露装置
ばく露の発生源/構造
  • superconducting magnet consisting of a 16 cm bore in the horizontal direction
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.
パラメータ
測定量 種別 Method Mass 備考
磁束密度 5.2 T minimum 指定なし - to 6.1 T

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

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.

研究の種別:

研究助成

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