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Preparation, Purification, and Use of Fatty Acid-containing Liposomes
Published on: February 9, 2018
Amylose-lipid complex formation from extruded maize starch mixed with fatty acids
Juan E Cervantes-Ramírez1, Angel H Cabrera-Ramirez2, Eduardo Morales-Sánchez2
1Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas s/n Col. Centro, Querétaro, Querétaro C.P. 76000, Mexico.
Abstract:
Functional modifications of starch, such as paste properties, retrogradation, water absorption indexes, solubility, and swelling capacity, are induced by the amylose-lipid complex. This research comprehends the study of functional properties of extruded maize starch mixed with fatty acids (stearic acid, oleic acid, and maize oil) and the formation of amylose-lipid complexes. Maize starch with lipids (5 or 10 %), moisture (35 %) was extruded (single screw). Starch granule was modified by extrusion, to a lesser extent at 10 % of lipids, especially stearic acid, which covers starch granule surface. Viscosity decreased meaningfully with stearic acid addition. DSC showed both starch gelatinization enthalpy and amylose-lipid complex enthalpy for stearic or oleic acid, but it was just the first enthalpy for maize oil. X-ray diffraction showed orthorhombic crystals with or without the presence of lipids. Our results indicated that stearic acid yielded the highest amount of amylose-lipid complexes.
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