Whitened exine shells
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United States of America Patent
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Sep 9, 2014
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N/A
app pub date -
Jul 9, 2009
filing date -
Jul 9, 2008
priority date (Note) -
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Abstract
A whitened exine shell having 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. It can be used in a method of surgery, therapy or diagnosis. 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 aceto lysis, and treating the isolated shell or a precursor thereof with a bleaching composition.
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