title: Prosopis alba exudate gum as excipient for improving fish oil stability in alginate-chitosan beads.
abstract: The aim of the present work was to employ an exudate gum obtained from a South American wild tree (Prosopis alba), as wall material component to enhance the oxidative stability of fish oil encapsulated in alginate-chitosan beads. For this purpose, beads were vacuum-dried and stored under controlled conditions. Oxidation products, fatty acid profiles and lipid health indices were measured during storage. Alginate-chitosan interactions and the effect of gum were manifested in the FT-IR spectra. The inclusion of the gum in the gelation media allowed decreasing the oxidative damage during storage in comparison to the free oil and alginate-chitosan beads. The gum also improved wall material properties, providing higher oil retention during the drying step and subsequent storage. Fatty acids quality and lipid health indices were widely preserved in beads containing the gum. Present results showed a positive influence of the gum on oil encapsulation and stability, being the main mechanism attributed to a physical barrier effect.
authors.affiliation: Laboratorio de Industrias Alimentarias II, Universidad Nacional del Chaco Austral, Comandante Fernández 755, Presidencia Roque Sáenz Peña 3700, Chaco, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. Electronic address: francovasile@hotmail.com.
authors.forename: Franco Emanuel
authors.initials: FE
authors.lastname: Vasile
authors.affiliation: Laboratorio de Industrias Alimentarias II, Universidad Nacional del Chaco Austral, Comandante Fernández 755, Presidencia Roque Sáenz Peña 3700, Chaco, Argentina.
authors.forename: Ana María
authors.initials: AM
authors.lastname: Romero
authors.affiliation: Laboratorio de Industrias Alimentarias II, Universidad Nacional del Chaco Austral, Comandante Fernández 755, Presidencia Roque Sáenz Peña 3700, Chaco, Argentina.
authors.forename: María Alicia
authors.initials: MA
authors.lastname: Judis
authors.affiliation: Laboratorio de Conservación de Biomoléculas, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria - Pabellón Industrias, Buenos Aires 1428, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
authors.forename: María Florencia
authors.initials: MF
authors.lastname: Mazzobre
mesh_terms: D000464:Alginates / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D005079:Excipients; D005395:Fish Oils / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D053149:Plant Gums / Q000737:chemistry*; D029862:Prosopis / Q000737:chemistry*
chemical_list: D000464:Alginates; D005079:Excipients; D005395:Fish Oils; D006603:Hexuronic Acids; D053149:Plant Gums; D020723:Glucuronic Acid; C416517:prosopis gum; D048271:Chitosan
keywords: DHA; Exudate gum; Ionic gelation; Prosopis alba