| 摘要 |
PURPOSE:To obtain a pigment which brightly colors a protein food or neutral food red by hydrolyzing a pigment extracted from a madder. CONSTITUTION:The objective red pigment is obtd. by extracting an anthraquinone pigment from at least one material selected from the group consisting of the roots, tissue culture cells, and cultured hairy roots of a madder with water or a water-contg. alcohol and hydrolyzing the extract to convert it into a substance which easily forms an aluminum complex. The hydrolysis is conducted by the treatment with an enzyme, microorganism, acid, or alkali. The enzymatic treatment is conducted at 40 deg.C or lower for 8hr by adding 1.5% or lower enzyme having a beta-glucosidase activity to the extract, by culturing in the presence of the extract a microorganism which produces an enzyme having a beta-glucosidase activity, or by using both the methods. |
