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Extrusion of defatted soy flour‐hydrocolloid mixtures
Author(s) -
BOISON GLADYS,
TARANTO MICHAEL V.,
CHERYAN MUNIR
Publication year - 1983
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.1983.tb00310.x
Subject(s) - chewiness , absorption of water , extrusion , soy protein , water content , absorption (acoustics) , plastics extrusion , materials science , chemistry , bulk density , soy flour , sodium , food science , composite material , organic chemistry , environmental science , geotechnical engineering , soil science , engineering , soil water
Summary Defatted soy flour containing low levels of added hydrocolloid (either sodium alginate or methylcellulose) was thermoextruded in a laboratory single‐screw extruder, and the effect of operating parameters on selected textural properties (maximum peak force, determined in an Ottawa Measuring (OTMS) cell, and chewiness) and physical properties (bulk density and water absorption capacity) were studied. Adding sodium alginate generally increased OTMS peak force, chewiness and water absorption capacity and increased bulk density. Extruding at a feed moisture content of 22% w/w resulted in the best properties, regardless of the levels of other independent variables. Maximum force and chewiness were positively correlated while bulk density and water absorption capacity were negatively correlated to each other.