This study aimed to develop essential oil (EO)-containing antimicrobial coatings for the inhibition of pathogenic bacteria contamination on fruit peels. Incorporation of eugenol (EUG), carvacrol (CAR), and thymol (THY) into films at ≥ 1% (w/w) eliminated the typical brittleness of zein films. However, EUG outperformed CAR and THY in terms of mechanical properties. Films with ≥ 2% (w/w) CAR and THY and ≥ 3% EUG showed clear zones against L. innocua and E. coli in agar medium at 37 °C. All EO-containing films also inhibited L. innocua and E. coli inoculated at their surfaces by minimum 3.9 and 2.7 decimal (D) within 1 day at 10 °C. Moreover, 2% EUG-containing zein coatings caused 2–3 decimal reduction in L. innocua and E. coli counts of inoculated melon surfaces at 10 °C. Unlike the bare zein coatings, flexible EUG-containing films on melons did not show cracking or detachment. Zein films loaded with EUG showed a highly hydrophilic surface. The best oxygen barrier performance was observed for the EUG-richest formulation (i.e., EUG at 3%), and this was attributed to a homogenizing effect of the EO that eventually led to a denser and hole-free network. This work suggested that flexible coatings of zein containing EOs could inhibit pathogens embedded in the rough peel surface of melons.
Development of flexible antimicrobial zein coatings with essential oils for the inhibition of critical pathogens on the surface of whole fruits : test of coatings on inoculated melons / D. Boyacı, G. Iorio, G.S. Sozbilen, D. Alkan, S. Trabattoni, F. Pucillo, S. Farris, A. Yemenicioğlu. - In: FOOD PACKAGING AND SHELF LIFE. - ISSN 2214-2894. - 20(2019 Jun), pp. 100316.1-100316.10.
|Titolo:||Development of flexible antimicrobial zein coatings with essential oils for the inhibition of critical pathogens on the surface of whole fruits : test of coatings on inoculated melons|
|Parole Chiave:||antimicrobial packaging; edible coating; edible film; essential oil; melon; zein|
|Settore Scientifico Disciplinare:||Settore AGR/15 - Scienze e Tecnologie Alimentari|
|Data di pubblicazione:||giu-2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.fpsl.2019.100316|
|Appare nelle tipologie:||01 - Articolo su periodico|