Astaxanthinogenesis in the yeast Phaffia rhodozyma. Optimization of low-cost culture media and yeast cell-wall lysis - Baron, Madalena.; Bonfim, Tania M. B.; Chocial, Miriam B.; Florencio, Jose A.; Fontana, Jose D.; Guimaraes, Manoel F.; Maraschin, Marcelo.; Ulhoa, Cirano.