Whitened exine shells
A whitened exine shell haying a degree of whiteness (L*) of greater than 65 measured under D 65 illumination. The shell can be used as a delivery vehicle for an active substance, or as an antioxidant. The invention provides a formulation containing the whitened exine shell together with an active substance; and a method for preparing the shell by isolating an exine shell from a naturally occurring spore under treatment conditions which do not include acetolysis, and treating the isolated shell or a precursor thereof with a bleaching composition.
ATKIN STEPHEN LAWRENCE [GB]; BECKETT STEPHEN THOMAS [GB]; MACKENZIE GRAHAME [GB]
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