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Effects of Carvacrol, (E)-2-hexenal, and Citral on the Thermal Death Kinetics of Listeria monocytogenes.
MedLine Citation:
PMID:  22186047     Owner:  NLM     Status:  In-Data-Review    
Carvacrol, (E)-2-hexenal, and citral at sublethal concentrations combined with isothermal heating between 55 and 68°C were assessed for their effects on Listeria monocytogenes 56LY. Experimental survival curves were obtained and fitted to the Weibull equation to estimate parameters describing their shape and rate. These parameters were further used to assess the impact of this combination of treatments on the cell resistance distribution during inactivation. The sublethal concentrations of the aroma compounds used (i.e., 50 mg/liter citral, 65 mg/liter (E)-2-hexenal, and 30 mg/liter carvacrol) did not prevent the growth of L. monocytogenes at 37°C but did enhance inactivation. Between 55 and 63°C, the presence of the aroma compounds reduced by about two-thirds the time needed for a 5-log reduction of the microbial counts, e.g., from 145.75 h in the control treatment (at 55°C) to 40.84 h in the presence of carvacrol (at the same temperature). The mean and variance observed in the frequency distribution of resistance were reduced as the temperature increased. The results obtained at isothermal temperatures and with single aroma components provide basic information regarding components frequently found in essential oils, which can be used in combination with less extreme thermal treatments to provide energy conservation and improve food quality.
Sylvain Sado Kamdem; Nicoletta Belletti; Rudy Magnani; Rosalba Lanciotti; Fausto Gardini
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food protection     Volume:  74     ISSN:  1944-9097     ISO Abbreviation:  J. Food Prot.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2070-8     Citation Subset:  IM    
Laboratoire de Biochimie, Faculté des Sciences, Université de Douala, BP 24157 Douala, Cameroon; Dipartimento di Scienze degli Alimenti, Università degli Studi di Bologna, Piazza Goidanich 60 47023 Cesena (FC), Italy.
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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