TREATMENT OF PHAFFIA RHODOZYMA

摘要

This invention relates to a process for enhancing the availability of astaxanthin in Phuffia rhodozyma yeast comprising forming an aqueous slurry by contacting the yeast with an aqueous solution of hydrochloric acid or sulfuric acid wherein the acid is present in an effective amount to modify the yeast's cell walls and thereafter heating the aqueous slurry at a temperature in the range of from about 60.degree.C to about 90.degree.C for about 2 hours to about 24 hours. The astaxanthin is useful as a dietary pigment supplement for salmonids and crustaceans grown on aquacultural farms.