Electrophoretic mobility phase angle

The particle property which is extracted from the measured ESA response is the dynamic mobility, of the drops. This is a complex quantity, having a magnitude and a phase angle (just as the ESA signal is a complex quantity). The magnitude of p j is analogous to the electrophoretic mobility obtained in, say, an electrophoresis experiment, where a d.c. field is applied. It is essentially determined by... 

When A. brasilense was cultured in Luria-Bertani rich medium, the surface composition varied during growth, as illustrated by Fig. 40. Modeling the composition in terms of molecular compounds indicated that the protein concentration increased, from 30 (exponential phase cells) to 50% (stationary phase cells), concomitantly with a decrease in the polysaccharide concentration, from 60 to 35%. These modifications were related to a change in cell-surface hydrophobicity, the water contact angle measured on cell lawns increasing from 20 to 60° (Fig. 40). No difference of electrophoretic mobility was detected between cells harvested in the exponential... 

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