Gum Arabic microcapsules as effective inhibitors of the photoinduced degradation of riboflavin in whole milk

Authors
Boiero, María Laura; Mandrioli, Mara; Vanden Braber, Noelia Luciana; Rodriguez Estrada, María T.; Garcia, Norman Andino; Borsarelli, Claudio Darío; Montenegro, Mariana Angélica
Publication Year
2014
Language
English
Format
article
Status
Published version
Description
Microcapsules (MC) made with gum arabic (GA) as shell material without and with b-carotene (bc) as core material were prepared by the spray-drying technique. The effect of these MC on the photodegradation of riboflavin (Rf) in whole milk by fluorescent daylight lamp irradiation was evaluated at a storage temperature of 4°C. The additions of 1.37mg/mL of MC without bc (MC-GA) and with 0.54 ug/mL of bc (MC-bc-GA) decreased the apparent first-order rate constant of Rf photodegradation by approximately 26 and 30%, respectively. A systematic kinetic and mechanistic analysis of the results indicates that the global protective effect of the MC is mainly due to the combination of quenching of the electronically excited triplet state of Rf and scavenging of the photogenerated reactive oxygen species, such as singlet molecular oxygen, superoxide radical anion and hydroxyl radical. A minor contribution to the photoprotective effect can be also associated with the inner-filter effect exerted by the MC, which partially blocks the direct excitation of Rf. These results allow us to conclude that photodegradation of Rf in milk can be considerably reduced by the addition of small amounts of MC, avoiding large losses in the nutritional value of milk.
Fil: Boiero, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional. Facultad Regional Villa María. Departamento de Química; Argentina
Fil: Mandrioli, Mara. Università di Bologna; Italia
Fil: Vanden Braber, Noelia Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; Argentina
Fil: Rodriguez Estrada, María T.. Università di Bologna; Italia
Fil: Garcia, Norman Andino. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Borsarelli, Claudio Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Santiago del Estero. Universidad Nacional de Santiago del Estero. Centro de Investigaciones y Transferencia de Santiago del Estero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Montenegro, Mariana Angélica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional. Facultad Regional Villa María. Departamento de Química; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; Argentina
Subject
RIBOFLAVIN PHOTODEGRADATION
β-CAROTENE
GUM ARABIC
REACTIVE OXYGEN SPECIES
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/33737