The electrophoretic mobility of micro-organisms.

Publisher Summary Electrophoretic mobility refers to measure of the movement of a particle in a solution when subjected to an externally applied electric field. The direction and rate of this movement depends on the polarity and density of the surface charges. Many surfaces acquire a charge in aqueous media, measurements of electrophoretic mobility can provide useful information regarding the composition of surfaces and the physical behavior of suspended particles. Surface properties can play an important role in the behavior of microorganisms and gene expression can also be modified by responses of the surface to changes in environment. The external surfaces of microorganisms vary widely in structure and composition. Bacterial and fungal spores often have a layered wall structure and a complex surface morphology. Ionic surface groups can be identified by studying pH-mobility curves of cells before and after treatment with specific chemical reagents or enzymes. This chapter deals with the practical applications of the electrophoretic mobility technique to the study of various microorganisms.

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