Effect of pulsed light treatment on Listeria inactivation, sensory quality and oxidation in two varieties of Spanish dry-cured ham.

Autor: Fernández M; Food Technology Department, Veterinary Faculty, Complutense University of Madrid, 28040 Madrid, Spain. Electronic address: manuela@vet.ucm.es., Hospital XF; Food Technology Department, Veterinary Faculty, Complutense University of Madrid, 28040 Madrid, Spain., Cabellos C; Food Technology Department, Veterinary Faculty, Complutense University of Madrid, 28040 Madrid, Spain., Hierro E; Food Technology Department, Veterinary Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2020 Jun 30; Vol. 316, pp. 126294. Date of Electronic Publication: 2020 Jan 27.
DOI: 10.1016/j.foodchem.2020.126294
Abstrakt: The efficacy of pulsed light (PL) for the surface decontamination of ready-to-eat dry-cured ham was studied in two Spanish varieties, Serrano and Iberian. Listeriainnocua was inoculated on the surface of ham slices that were vacuum-packaged and flashed with 2.1, 4.2 and 8.4 J/cm 2 . Survivors were enumerated immediately after treatment. Peroxide values, sensory analysis and volatile profile were investigated during storage at 4 and 20 °C. Inactivation of Listeria was higher in Iberian (ca. 2 log cfu/cm 2 ) than in Serrano ham (ca. 1 log cfu/cm 2 ) with 8.4 J/cm 2 . PL did not increase the peroxide values above the usual levels reported in dry-cured ham, and no rancid notes were observed in the sensory analysis. PL-treated samples showed an increase in the concentration of some volatile compounds, such as methional, dimethyl disulfide and 1-octen-3-one, which imparted slight sulfur and metallic notes, although they disappeared during storage.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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