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Abstract
Two nonionic surfactants (Simulsol 98 and Simulsol OL 50) alone and I:I mixtures, corn oil-undecylenic acid and water formed emulsions, oily isotropic liquid phases, lamellar and hexagonal liquid crystal phases. The optimum release of undecylenic acid from these phases were controlled microbiologically. The active ingredient undecylenic acid, is released more from emulsion systems containing liquid crystals than only liquid crystalline and oily isotropic liquid phases.