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Thermorheological characteristics of chickpea flour slurry as affected by moisture content

AuthorsÁlvarez, M. Dolores ; Fuentes, Raúl ; Olivares, M. Dolores ; Cuesta, Francisco Javier; Canet, Wenceslao
KeywordsChickpea flour
Elastic modulus
Reaction kinetics
Thermal characteristics
Issue Date26-Mar-2014
CitationJournal of Food Engineering 136 : 9–18 (2014)
AbstractDynamic and thermal properties of chickpea flour (CF) slurry and paste were evaluated to understand CF behavior before incorporating it into other foods. Viscoelastic properties of CF slurry were investigated as a function of flour to water ratio (1:5, 1:4, 1:3, and 1:2), using vane geometry. Heat-induced gelatinization of CF was studied by rheometric measurement under both isothermal and non-isothermal heating processes. Isothermally induced paste behaved like a weak gel. CF gelatinization kinetics were evaluated by a non-isothermal technique as a function of G', and G' vs. time (t) data from the cross-over of G' and G" up to the G'max value were considered for rate estimation. Zero-order reaction kinetics described CF gelatinization process well, with activation energies ranging between 19.5 ± 0.4 and 22 ± 0.5 kJ mol–1. Differential scanning calorimetry (DSC) analysis revealed that gelatinization enthalpy of CF slurry was significantly affected by the moisture content.
Publisher version (URL)http://dx.doi.org/10.1016/j.jfoodeng.2014.03.014
Appears in Collections:(ICTAN) Artículos
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