info:eu-repo/semantics/article
Whey proteins-folic acid complexes: Formation, isolation and bioavailability in a Lactobacillus casei model
Fecha
2020-10Registro en:
Corfield, Rocío; Martínez, Karina Dafne; Allievi, Mariana Caludia; Santagapita, Patricio Roman; Mazzobre, Maria Florencia; et al.; Whey proteins-folic acid complexes: Formation, isolation and bioavailability in a Lactobacillus casei model; Elsevier; Food Structure; 26; 10-2020; 1-8
2213-3291
CONICET Digital
CONICET
Autor
Corfield, Rocío
Martínez, Karina Dafne
Allievi, Mariana Caludia
Santagapita, Patricio Roman
Mazzobre, Maria Florencia
Schebor, Carolina Claudia
Perez, Oscar Edgardo
Resumen
The objective of this work was to explore the complexation of a whey protein (β-lactoglobulin, β-lg) and a whey protein isolate (WPI) with folic acid (FA) at pH 3.0. Complexes were formed through non-covalent interactions, mainly electrostatic, as showed by ƺ-potential determination. Whey protein aggregation induced by the FA linkage was achieved, with particle sizes within the nano and microscales. Particle size distribution in aqueous solution was determined by dynamic light scattering (DLS) obtaining values between 15−200 nm. Complexes isolation was achieved by spontaneous phase separation and subsequent lyophilization, obtaining a glassy powder. Particles sizes increased upon both complexation and powder rehydration. The interactions between FA and proteins were corroborated by FTIR. Confocal laser microscopy revealed the heterogeneity and extensive aggregation of the complexation. The bioavailability of the WPI-FA and β-lg-FA complexes, evaluated by Lactobacillus casei BL23 model, was similar to that of FA alone demonstrating that these complexes can be potentially used as a new functional protein-based ingredient.