Abstract
The aim of this work was to carry out the physicochemical and functional characterization of the purified galactomannan obtained from mesquite seed’s endosperm (MSG). From the seeds, a MSG content of 13/100 g with a purity of 94/100 g was determined. The dispersions of MSG samples (up to 5 g/100 mL) exhibited a shear thinning non-Newtonian behavior, with 35.68 mPa.s of viscosity, and surface tension values between 43.5 and 61.06 dynes/cm. The chromatographic analysis revealed a 1.1:1 mannose/galactose ratio, with a molecular weight between 900,000 and 1,000,000 Da. The calorimetric analysis showed a specific vitreous transition temperature of 52.92 °C. The values of apparent viscosity were superior to those of commercial galactomannans, which indicates that MSG can be used too as a thickening agent. The obtained results provide information, which contribute to a better knowledge of MSG, in order to consider its sustainable exploitation in a future.
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