Characterization of alkali-modified soy protein concentrate
Author(s) -
Miroljub Barać,
Sladjana P. Stanojević,
Snežana Jovanović
Publication year - 2005
Publication title -
acta periodica technologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.134
H-Index - 15
eISSN - 2406-095X
pISSN - 1450-7188
DOI - 10.2298/apt0536011b
Subject(s) - soy protein , chemistry , emulsion , solubility , alkali metal , alcohol , food science , denaturation (fissile materials) , hydrolysis , leaching (pedology) , chromatography , biochemistry , nuclear chemistry , organic chemistry , environmental science , soil water , soil science
To study the influence of the preparation mode, including mild alkali modification, of soy protein concentrate on soluble protein content and composition, some of its nutritive and functional properties were investigated. Soy protein concentrate prepared by aqueous alcohol leaching was modified in mild alkaline solutions (pH 8.0) at 40, 50 and 60° C for 60 minutes and compared with two principal types of commercial soy protein concentrate. Soluble protein content, composition and properties of soy protein concentrate, as well as their potential use are essentially determined by the preparation mode. Limited mild alkali hydrolysis increased protein solubility by 40-71%, while emulsion stability was increased by 18-56%. Major storage soybean proteins exhibited different stability to alcohol denaturation and mild alkali modification. The most susceptible were acidic -A3 - and -A5- subunits of glycinin
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