The Effect of “Low Voltage” X-rays on the Electrophoretic Migration Velocity, Viability and pH ofEscherichia coliSuspensions

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Abstract
The total radiation from a Coolidge x-ray tube at 30 K.V.r.m.s. (no filters) with exposures as great as 3000 milliampere minutes at 15.2 cm. target-culture distance produced no detectable changes in the electrophoretic migration velocity, viability or pH of aqueous suspensions of E. coli. Attention is called to the lack of agreement concerning the lethal or non-lethal action of x-rays toward bacteria, and differences in experimental technique are discussed as possible causes.