Antimicrobial soy protein isolate‐based films: physical characterisation, active agent retention and antifungal properties against Penicillium italicum

Antimicrobial soy protein isolate‐based films: physical characterisation, active agent... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Food Science & Technology Wiley

Antimicrobial soy protein isolate‐based films: physical characterisation, active agent retention and antifungal properties against Penicillium italicum

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Publisher
Wiley
Copyright
International Journal of Food Science and Technology © 2018 Institute of Food Science and Technology
ISSN
0950-5423
eISSN
1365-2621
D.O.I.
10.1111/ijfs.13664
Publisher site
See Article on Publisher Site

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.

Journal

International Journal of Food Science & TechnologyWiley

Published: Jan 1, 2018

Keywords: ; ; ;

References

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