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RHEOLOGICAL PROPERTIES OF AQUEOUS SUNFLOWER PROTEIN DISPERSIONS
Author(s) -
LEFEBVRE J.,
SHERMAN P.
Publication year - 1977
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.1977.tb01195.x
Subject(s) - rheology , aqueous solution , materials science , sunflower oil , chemical engineering , shear rate , stress relaxation , relaxation (psychology) , chemistry , composite material , organic chemistry , biochemistry , creep , engineering , psychology , social psychology
Rheological properties of 10.0% and 20.0% (wt/wt) aqueous dispersions of sunflower proteins have been examined at pH 10.0 by shear stress‐shear rate and stress relaxation‐time studies, respectively. The 10.0% isolates exhibited non‐Newtonian power law flow behaviour, with the power exponent decreasing during sample ageing to a mini‐muni at about 180 min and then increasing. The 20.0% isolates exhibited uiscoelasticity with the stress relaxation modulus increasing with ageing times up to about 290 min and then decreasing. Both series of observations can be explained in terms of aggregation, hydration and chain entanglement of protein molecules, with protein hydrolysis becoming a major factor after longer ageing times.