title: Carrot fiber (CF) composite films for antioxidant preservation: Particle size effect.
abstract: The effect of particle size (53, 105 and 210 μm) of carrot fiber (CF) on their hydration properties and antioxidant capacity as well as on the performance of the CF-composite films developed with commercial low methoxyl pectin (LMP) was studied. It was determined that CF contained carotenoids and phenolics co-extracted with polysaccharides (80%), rich in pectins (15%). CF showed antioxidant activity and produced homogeneous calcium-LMP-based composites. The 53-μm-CF showed the lowest hydration capability and produced the least elastic and deformable composite film due probably to CF bridged by calcium-crosslinked LMP chains. Antioxidant activity associated to the loaded CF was found in composites. When L-(+)-ascorbic acid (AA) was also loaded, its hydrolytic stability increased with the decrease in CF-particle size, showing the lowest stability in the 0%-CF- and 210 μm-CF-LMP films. Below ≈ 250 μm, the particle size determined the hydration properties of pectin-containing CF, affecting the microstructure and water mobility in composites.
authors.affiliation: Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, Argentina; SENESCYT, Ecuador.
authors.forename: Alondra M
authors.initials: AM
authors.lastname: Idrovo Encalada
authors.affiliation: Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, Argentina; National Research Council of Argentina (CONICET), Argentina.
authors.forename: Maria F
authors.initials: MF
authors.lastname: Basanta
authors.affiliation: Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, Argentina; National Research Council of Argentina (CONICET), Argentina.
authors.forename: Eliana N
authors.initials: EN
authors.lastname: Fissore
authors.affiliation: Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, Argentina; National Research Council of Argentina (CONICET), Argentina.
authors.forename: Maria D
authors.initials: MD
authors.lastname: De'Nobili
authors.affiliation: Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, Argentina; National Research Council of Argentina (CONICET), Argentina. Electronic address: arojas@di.fcen.uba.ar.
authors.forename: Ana M
authors.initials: AM
authors.lastname: Rojas
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry*; D002338:Carotenoids / Q000737:chemistry*; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D018552:Daucus carota / Q000737:chemistry*; D004349:Drug Packaging / Q000379:methods; D004355:Drug Stability; D004548:Elasticity; D006868:Hydrolysis; D010368:Pectins / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D013718:Tensile Strength
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D002338:Carotenoids; D010368:Pectins; D002482:Cellulose; D001205:Ascorbic Acid
keywords: Antioxidant preservation; Average particle size; Carotenoids and phenolics; Carrot fiber; Composite films; Pectins