Modelling starch phase transitions and water uptake of rice kernels during cooking

Briffaz Aurélien, Mestres Christian, Matencio Françoise, Pons Brigitte, Dornier Manuel. 2013. Modelling starch phase transitions and water uptake of rice kernels during cooking. Journal of Cereal Science, 58 (3) : 387-392.

Quartile : Q2, Sujet : FOOD SCIENCE & TECHNOLOGY

Résumé : To model the cooking processes of rice, starch gelatinization, the level of fusion of the amylose-lipid complex, and equilibrium water uptake have to be known for any given condition. Starch phase transitions were measured by DSC in two milled Korean round rice kernels whose water contents ranged from 0.18 to 4.7 g g_1 db. Two to three partially overlapping transitions were assessed. Starch thermal transitions were modelled using a double step approach. First, a mechanistic double sigmoid model was fitted with DSC data for any water content value. Each parameter of the mechanistic model was then modelled with conservative empirical water content functions. In this way we obtained an explicit form of phase transition levels as a function of both temperature and water content. In parallel, the water uptake kinetics of rice kernels was determined in the temperature range of 50 _Ce100 _C. Equilibrium water uptake was found to be linked to starch phase transitions and a model was built to calculate equilibrium water uptake as a function of modelled starch gelatinization and amylose-lipid complex fusion levels.

Mots-clés Agrovoc : riz, amidon, modèle, absorption d'eau, état physique, cuisson, gélification, température, teneur en eau, propriété physicochimique

Mots-clés complémentaires : Amidon de riz

Classification Agris : Q02 - Traitement et conservation des produits alimentaires
Q04 - Composition des produits alimentaires
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Briffaz Aurélien, Montpellier SupAgro (FRA)
• Mestres Christian, CIRAD-PERSYST-UMR Qualisud (FRA)
• Matencio Françoise, CIRAD-PERSYST-UMR Qualisud (FRA)
• Pons Brigitte, CIRAD-PERSYST-UMR Qualisud (FRA)
• Dornier Manuel, CIRAD-PERSYST-UMR Qualisud (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/572432/)

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