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Nahrung ; 45(6): 412-5, 2001 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11712245

RESUMEN

The properties of acetylated, succinylated and phosphorylated protein isolates extracted from the flour of yellow lupins (L. luteus) were studied by means of oscillatory rheology. The flow behaviour of protein dispersions (15% w/w) and the properties of thermotropic gels were distinctly influenced by the modification. Succinylation increased the viscosity of the dispersions of unmodified protein isolate (LPI) from 99 mPas to 515 mPas and results in the lowest gel point (T = 30.5 degrees C). Acetylation and phosphorylation enhance the pseudoplastic flow behaviour of the dispersions. Acylated lupin samples formed the strongest gels with a small visco-elastic range while phosphorylation leads to weak and "rubber-like" gels.


Asunto(s)
Fabaceae/química , Proteínas de Vegetales Comestibles/química , Acetilación , Geles , Fosforilación , Reología , Relación Estructura-Actividad , Temperatura
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