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  • Title: Combined action of S-carvone and mild heat treatment on Listeria monocytogenes Scott A.
    Author: Karatzas AK, Bennik MH, Smid EJ, Kets EP.
    Journal: J Appl Microbiol; 2000 Aug; 89(2):296-301. PubMed ID: 10971762.
    Abstract:
    The combined action of the plant-derived volatile, S-carvone, and mild heat treatment on the food-borne pathogen, Listeria monocytogenes, was evaluated. The viability of exponential phase cultures grown at 8 degrees C could be reduced by 1.3 log units after exposure to S-carvone (5 mmol l-1) for 30 min at 45 degrees C, while individual treatment with S-carvone or exposure to 45 degrees C for 30 min did not result in a loss in viability. Other plant-derived volatiles, namely carvacrol, cinnamaldehyde, thymol and decanal, were also found to reduce the viability of L. monocytogenes in combination with the same mild heat treatment at concentrations of 1.75 mmol l-1, 2.5 mmol l-1, 1.5 mmol l-1 and 2 mmol l-1, respectively. These findings show that essential oil compounds can play an important role in minimally processed foods, and can be used in the concept of Hurdle Technology to reduce the intensity of heat treatment or other individual hurdles.
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