Method for producing soluble feather keratin protein

摘要

PROBLEM TO BE SOLVED: To easily convert a feather, that is produced in treatment of waste chicken or broiler and difficult to effectively use as it is, into soluble feather keratin protein.;SOLUTION: Feather for bedding inner pad is washed with a neutral detergent, washed with water and dried. The feather in an amount of 1 g is fed to a flask of 300 mL, mixed with 50 mL of a thioglycolic acid solution having 0.2 mol/L concentration adjusted to pH 11.0 with sodium hydroxide, stirred and shaken at 30°C for 48 hours, the solution is adjusted to 30°C and adjusted to pH 7 with acetic acid. The solution is mixed with 50 mL of sodium bromate solution having 0.4 mol/L concentration by gradually adding the sodium bromate solution over 4 hours, then the solution is allowed to stand for 20 hours. Then insoluble matter is filtered off from the solution, the solution is adjusted to approximately pH 3.5 with acetic acid, a polymer substance is precipitated and the precipitate is recovered by centrifugal separation. The precipitate is made into a paste state acidic with acetic acid and preserved at a dark cold place. The solubilization does not cause the reduction in molecular weight.;COPYRIGHT: (C)2010,JPO&INPIT