title: Hydrolysis kinetics of okara and characterization of its water-soluble polysaccharides.
abstract: As a part of a study of reuse of waste okara, the kinetic mechanism of okara hydrolysis and the properties of the water-soluble polysaccharides (WSP) extracted were investigated. Okara was hydrolyzed by being autoclaved at pH 4.5 in two volume of water with or without a chelator such as hexametaphosphate. Okara hydrolysis proceeded by surface degradation mechanism without a chelator. Characterization of WSP suggested that the "egg-box regions" in okara were susceptible to degradation by a chelator and that the "non-egg-box regions" contained WSP linked with hydrophobic proteins. WSP with a molecular weight of more than 10(5) and the amount of protein bound to the polysaccharides seemed to govern their emulsifying characteristics.
authors.affiliation: Department of Biochemical Engineering, Toyama National College of Technology, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Yoshii
authors.forename: T
authors.initials: T
authors.lastname: Furuta
authors.forename: H
authors.initials: H
authors.lastname: Maeda
authors.forename: H
authors.initials: H
authors.lastname: Mori
mesh_terms: D002614:Chelating Agents; D005079:Excipients / Q000032:analysis*; D006023:Glycoproteins / Q000032:analysis; D006603:Hexuronic Acids / Q000032:analysis; D006868:Hydrolysis; D007220:Industrial Waste; D007700:Kinetics; D010710:Phosphates; D011134:Polysaccharides / Q000032:analysis*; D012995:Solubility; D030262:Soybean Proteins / Q000032:analysis; D013025:Glycine max / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D005079:Excipients; D006023:Glycoproteins; D006603:Hexuronic Acids; D007220:Industrial Waste; D010710:Phosphates; D011134:Polysaccharides; D030262:Soybean Proteins; D014867:Water; C007819:galacturonic acid; C009285:sodium polymetaphosphate