Propriétés physico-chimiques et rhéologiques de la farine et de l'amidon de taro (Colocasia esculenta L. Schott) variété Sosso du Tchad en fonction de la maturité et du mode de séchage

Abstract : Results showed that the ash content, crude proteins, available sugars, total oxalate, starch and phosphorus content increased significantly with the maturity stage. On the other hand the amylose content decreased as function of the maturity. The water adsorption capacity, the water solubility index, the temperature and the enthalpy of gelatinization of the flour and starch increased significantly with the maturity stage. Irrespective of the degree of maturity the starch granules diffractogramm were exhibited an "A" type cristallinity. The browning indicators increased significantly (p<0.05) with the maturity stage of the tuber. The color coordinate L* of the flours and that of its dough increased while a* decreased with the maturity stage. These two coordinates lend themselves better with electric drying than solar drying. The sensory characteristics of the taro Sosso dough were positively affected by the maturity stage and electric drying. The overall acceptability of taro Sosso dough was correlated with its color. These results suggest that 10 months of the taro Sosso maturity and the electric drying (40°C) are the best conditions to obtain the acceptable pastes. These optimum conditions might be used to produce the taro flour at industrial scale
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Makhlouf Himeda. Propriétés physico-chimiques et rhéologiques de la farine et de l'amidon de taro (Colocasia esculenta L. Schott) variété Sosso du Tchad en fonction de la maturité et du mode de séchage. Alimentation et Nutrition. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0262⟩. ⟨tel-01749889⟩

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