Desidratação de polpa de umbu.

Abstract

This work was accomplished with the aim of produce integral pulp starting from the mature Spondias tuberosa Arruda Camara, to dehydrate it, to spray it, to characterize it and to study its stability by means of the evolution of its properties during the storage for 60 days, in two packing types, being a laminate one and another in polyethylene leaf, exposed in temperature sets. The Spondias tuberosa Arruda Camara powder was obtained by dehydration means by the "foam-mat" method with drying in stove with circulation of air and temperature of 70°C. The characterization of the integral pulp consisted of the pH determination, total soluble solids (°Brix), total solids, moisture, ascorbic acid, ashes, total acidity, reducers sugars, density and color. In the powdered pulp they were certain moisture, ascorbic acid, pH, total acidity, reducers sugars, color and moisture adsorption isotherms. In the study of the stability of the powdered pulp during the storage in the two packings, at room temperature, it was observed, after 60 days, reductions in values of ascorbic acid, pH and reducers sugars in the samples of both packings. In the two packings the samples went by increases in the moisture text and in total acidity. In the color parameters the samples in laminate packing maintained the initials characteristics for the whole storage period, while in the polyethylene packing the brightness parameters and yellow intensity suffered reduction, result of the materials darkening. In all the appraised characteristics the reductions or increases verified along the storage, happened in smaller proportions in the materials in laminate packings, indicating a better conservation of the samples in that packings. Of the models used for the moisture adsorption isotherms fitting the one of Peleg it resulted in the best fittings, with determination coefficients (R2) above 0,9 and medium percentile deviations minor to 10%.