Abstract

FIGUEROA-FLOREZ, Jorge et al. Almidones de yuca modificados por biocatálisis enzimática: efecto del tiempo de reacción y método de secado. Dyna rev.fac.nac.minas [online]. 2019, vol.86, n.208, pp.162-170. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v86n208.72976.

Currently, comes up the need to develop and produce modified starches that allow enhancing their applicability as additives in food industry. In this, the effect of biocatalysis time and type of drying (forced convection and vacuum drying) on the morphological, structural and pasting properties of enzymatically modified cassava starch granules was evaluated. The application of amyloglucosidase generated a degree of hydrolysis ranging between 35.87 and 41.02% dextrose equivalents (ED), in addition, it caused significant changes in starch granules morphology. At structural level, modified starch reveals substantial changes with respect to control, where FT-IR spectra show the displacement of absorption bands by tension or bending in the region between 900 and 1100 cm-1 due to the breakdown of α-D-glucosidic bonds α-D-(1,4) or α-D-(1,6), increasing swelling, absorption and solubility in water properties. Likewise, significant changes are reported in pasting properties together with an increase in stability in techno-functional properties of hydrolyzed starches dried by vacuum.

Keywords : amylose; amyloglucosidase; enzymatic biocatalysis; gelatinization; retrogradation.

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