Antimicrobial soy protein isolate‐based films: physical characterisation,active agent retention and antifungal properties against Penicillium italicum |
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Authors: | Ramsés R. González‐Estrada Montserrat Calderón‐Santoyo Juan A. Ragazzo‐Sánchez Stephane Peyron Pascale Chalier |
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Affiliation: | 1. Laboratorio Integral de Investigación en Alimentos, Instituto Tecnológico de Tepic., Tepic, Nay, Mexico;2. Unité Mixte de Recherche, Ingénierie des Agropolymères et Technologies Emergentes 1208 (UMR IATE), INRA, SupAgro, Cirad, Université de Montpellier, Montpellier Cedex 01, France |
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Abstract: | Soy protein isolates (SPI) films were evaluated as carriers of citral and limonene, and their physical and antifungal properties were evaluated. The presence of antimicrobials in SPI films resulted in changes on colour without affecting the transparency. Films with citral added were more extensible; however, a reduction in tensile strength and elastic modulus was observed in films with limonene added. Aroma compounds addition in films induced a slight increase in water vapour properties in relation to discontinuity of network proteins evidenced by SEM. Besides, FTIR spectra evidenced a partial alteration of SPI secondary structure. Citral was less retained than limonene. The increase in limonene release with high relative humidity was explained by increase in protein chain mobility. SPI films enriched with limonene exhibited strong antifungal activity against the postharvest decay pathogen Penicillium italicum under storage conditions. |
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Keywords: | Aroma compounds functional properties in  vitro inhibition soy protein isolate |
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