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Título : Improved process for decontamination of whey by a continuous flow-through pulsed light system
Autor : Luz Artiguez, Mari; Martinez de Maranon, Inigo
Citación : FOOD CONTROL, 2015, 47, 599-605
Resumen : The effect of a continuous flow-through pulsed light (PL) system on the inactivation of Listeria innocua was evaluated in different liquid substrates: distilled water, whey, diluted whey and skimmed whey. Reductions in L innocua counts increased with number of pulses and total fluence. For similar total fluence, treatments consisting of a higher number of pulses but lower voltage were more effective in L. innocua inactivation due to a higher probability to expose cells to the incident light. Microbial inactivation by PL depended on the quantity of light transmitted in the range 230-290 nm by liquid substrates. Regardless of the limited effectiveness of PL for decontamination of whey, its shelf life during storage at 4 degrees C was extended by at least 7 days. In order to improve the antimicrobial effectiveness of PL, this treatment could be carried out at mild processing temperatures (60 degrees C), which was shown to exhibit a synergistic effect on the inactivation of L. innocua. This combined process appears as a promising technique to decontaminate complex substrates such as whey or to reduce the intensity of individual treatments to achieve the required level of microbial inactivation. (C) 2014 Elsevier Ltd. All rights reserved.
Palabras clave : Food preservation; Light exposure; Mild processing temperatures; Listeria; Synergistic effect; Non-thermal process; BACILLUS-CEREUS ENDOSPORES; ESCHERICHIA-COLI W1485; LISTERIA-MONOCYTOGENES; CHEESE WHEY; NONTHERMAL TECHNOLOGIES; ULTRAVIOLET-RADIATION; ORANGE JUICE; APPLE CIDER; SHELF-LIFE; UV-LIGHT
Fecha de publicación : 2015
Editorial : ELSEVIER SCI LTD
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1016/j.foodcont.2014.08.006
URI : http://dspace.azti.es/handle/24689/301
ISSN : 0956-7135
E-ISSN: 1873-7129
Patrocinador: Department of Environment, Territorial Planning, Agriculture and Fisheries of the Basque Government
Department of Education, Universities and Research of the Basque Government
Aparece en las tipos de publicación: Artículos científicos



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