Effect of weak pulse electric fields on surface properties and destructive activity of Pseudomonas bacteria

摘要

The effect of weak pulse electric fields on the destructive activity and surface properties of Pseudomonas bacteria is studied. It is revealed that the physiological response of bacteria on their treatment by external pulse fields depends on field parameters and is accompanied by the changes in the values of electrokinetic potential and hydrophobicity. The treatment of bacteria by the electric field with pulse duration of 1-10 ms and frequency of 100-500 Hz tends to increase by 20-30% the destruction of NaAg(CN)_2. It is suggested that changes in surface properties and the enhancement of biochemical activity of bacteria are based on the metabolic reaction of the cell related to the stimulation or suppression of the bacteria respiration upon the imposition of external field.