Title
Modeling the effects of temperature and pH on the resistance of Alicyclobacillus acidoterrestris in conventional heat-treated fruit beverages through a meta-analysis approach
Date Issued
01 April 2015
Access level
open access
Resource Type
journal article
Author(s)
Silva L.P.
Cadavez V.
Sant'Ana A.S.
Instituto Politécnico de Bragança
Publisher(s)
Academic Press
Abstract
In this work, all publicly-accessible published findings on Alicyclobacillus acidoterrestris heat resistance in fruit beverages as affected by temperature and pH were compiled. Then, study characteristics (protocols, fruit and variety, °Brix, pH, temperature, heating medium, culture medium, inactivation method, strains, etc.) were extracted from the primary studies, and some of them incorporated to a meta-analysis mixed-effects linear model based on the basic Bigelow equation describing the heat resistance parameters of this bacterium. The model estimated mean D* values (time needed for one log reduction at a temperature of 95°C and a pH of 3.5) of Alicyclobacillus in beverages of different fruits, two different concentration types, with and without bacteriocins, and with and without clarification. The zT (temperature change needed to cause one log reduction in D-values) estimated by the meta-analysis model were compared to those ('observed' zT values) reported in the primary studies, and in all cases they were within the confidence intervals of the model. The model was capable of predicting the heat resistance parameters of Alicyclobacillus in fruit beverages beyond the types available in the meta-analytical data. It is expected that the compilation of the thermal resistance of Alicyclobacillus in fruit beverages, carried out in this study, will be of utility to food quality managers in the determination or validation of the lethality of their current heat treatment processes.
Start page
541
End page
552
Volume
46
Language
English
OCDE Knowledge area
Biología celular, Microbiología Agricultura
Scopus EID
2-s2.0-84908374199
PubMed ID
Source
Food Microbiology
ISSN of the container
07400020
Sponsor(s)
A.S. Sant'Ana and L.P. Silva are indebted to the financial support provided by CAPES , CNPq and FAPESP . Dr. Gonzales-Barron wishes to acknowledge the financial support provided by the Portuguese Foundation for Science and Technology (FCT) through the award of a five-year Investigator Fellowship (IF) in the mode of Development Grants ( IF/00570 ).
Sources of information: Directorio de Producción Científica Scopus