Edible methylcellulose-based films containing fructo-oligosaccharides as vehicles for lactic acid bacteria

Food Research International
Nelson RomanoAndrea Gómez-Zavaglia

Abstract

The goal of this work was to investigate the physicochemical properties of methylcellulose (MC) based films as stabilizers of two strains of lactobacilli: Lactobacillus delbrueckii subsp. bulgaricus CIDCA 333 and Lactobacillus plantarum CIDCA 83114. The incorporation of 3% w/v fructo-oligosaccharides (FOS) into the MC film formulation improved the viability of L. delbrueckii subsp. bulgaricus CIDCA 333 after film preparation. L. plantarum CIDCA 83114 was intrinsically more resistant as no viability loss was observed upon preparation of the films in the absence of FOS. Scanning electronic microscopy images also showed a good incorporation of microorganisms without affecting the homogeneity of the films. FTIR spectroscopy provided structural information about the bacteria-loaded films. Water sorption isotherms showed an impervious behavior at low aw but on exceeding 0.7 of aw the film started to dissolve and form syrup, causing a drastic drop of bacterial viability (log N/N0≤-5). Dynamic mechanical analysis (DMA) demonstrated that the incorporation of microorganisms into the MC films had no effect on vitreous transition temperatures. FOS incorporated into the MC films had a plasticizing effect. Microorganism-loaded films were sto...Continue Reading

Citations

Feb 27, 2020·Plant Foods for Human Nutrition·Natalya GregirchakViktor Stabnikov
Oct 18, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jingsong YeYaowen Liu
Jan 5, 2018·International Journal of Molecular Sciences·Foteini PavliNikos Chorianopoulos
Feb 4, 2021·Foods·Elsa Díaz-Montes, Roberto Castro-Muñoz
May 1, 2018·Comprehensive Reviews in Food Science and Food Safety·Ana GuimarãesMiguel A Cerqueira
Jul 31, 2016·Carbohydrate Polymers·Gabrielly Terassi BersanetiMaria Antonia Pedrine Colabone Celligoi

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