Emulsification Properties of Water-soluble Soybean Polysaccharides Extracred from Soybean Curd Waste

Abstract

Okara (soybean curd waste), a by-product of tofu and soybean protein manufacturing, is treated as industrial waste. Maeda has proposed a method of extracting soybean water-soluble polysaccharides (SSPS) from okara, and has used the preparation as an emulsifier or viscoelastic reagent. SSPS had a high emulsifying ability of d-limonene in acid conditions as gum arabic (GA) . An emulsified solution of ethyl butyrate with GA was very unstable but SSPS could emulsify ethyl butyrate at pH 3-6. SSPS was also a superior emulsifier for hydrophilic oil compounds such as ethyl caproate and hexanol.