In the present study, low density polyethylene films were activated by co-extrusion with zinc oxide, zinc acetate or potassium sorbate. Films were also surface-activated with tyrosol singly or in combination with lactic acid or p-hydroxybenzoic acid. Activated films were tested on Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, Salmonella enterica and Pseudomonas fluorescens. The combinations showing greatest inhibition zones and broadest inhibitory spectrum were the films activated with tyrosol plus p-hydroxybenzoic acid. A small delay in growth of Listeria innocua was observed on seabream packed in ZnO-activated films during refrigerated storage for 7 days. When films activated with 2.5% tyrosol or with 1.5% tyrosol plus 0.5 p-hydroxybenzoic acid were used for vacuum packaging of smoked salmon and smoked tuna challenged with cocktails of S. enterica and L. monocytogenes strains, the combination of tyrosol and p-hydroxybenzoic acid improved inactivation of both pathogens during chill storage compared to films singly activated with tyrosol. The best results were obtained in smoked salmon, since no viable pathogens were detected after 7 days of chill storage for the activated film. Results from the study highlight the potential of plastic films surface-activated with tyrosol and p-hydroxybenzoic acid in the control of foodborne pathogens in smoked seafood.
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Τρίτη 19 Ιουλίου 2016
Coatings, Vol. 6, Pages 28: Effect of Activated Plastic Films on Inactivation of Foodborne Pathogens
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Αλέξανδρος Γ. Σφακιανάκης Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,0030693260717...
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heory of COVID-19 pathogenesis Publication date: November 2020Source: Medical Hypotheses, Volume 144Author(s): Yuichiro J. Suzuki ScienceD...
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