& Jones, 1986). Therefore 5% Tween 80 in water clearly operates above the CMC so that 1%
GEO could be incorporated in the form of a thermodynamically stable microemulsion with a
surfactant to oil ration, 5:1.
Antimicrobial evaluation of the different concentrations of WGO and PGO microemulsions
revealed that both formulations inhibit the tested microorganisms only at 1.0%, (Table 4).
WGO microemulsion showed more antimicrobial activity than PGO as in the previous cases
with emulsion and organic solvent