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Abstract:

The purpose of this study was to analyze the response of different initial contamination levels of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice as affected by pulsed light treatment (PL, batch mode, xenon lamp, 3 pulses/s, 0–71.6 J/cm 2 ). Biphasic and Weibull frequency distribution models were used to characterize the relationship between inoculum size and treatment time with the reductions achieved after PL exposure. Additionally, a second order polynomial model was computed to relate required PL processing time to inoculum size and requested log reductions. PL treatment caused up to 3.0–3.5 log reductions, depending on the initial inoculum size. Inactivation curves corresponding to PL-treated samples were adequately characterized by both Weibull and biphasic models (R adj 2 94–96%), and revealed that lower initial inoculum sizes were associated with higher inactivation rates. According to the polynomial model, the predicted time for PL treatment increased exponentially with inoculum size. © 2017 Asociación Argentina de Microbiología

Registro:

Documento: Artículo
Título:Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels
Autor:Ferrario, M.I.; Guerrero, S.N.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, CABA, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina, Buenos Aires, Argentina
Palabras clave:Alicyclobacillus acidoterrestris; Apple juice; Biphasic model; Inoculum size; Pulsed light; Weibull model; Alicyclobacillus; Alicyclobacillus acidoterrestris; apple juice; Article; bacterial spore; bactericidal activity; colony forming unit; controlled study; inoculation; mathematical model; microbial contamination; microbial kinetics; nonhuman; particle size; photon correlation spectroscopy; physical chemistry; response surface method; sporogenesis; bacterial spore; beverage; food contamination; food control; Malus; Alicyclobacillus; Beverages; Food Contamination; Food Microbiology; Malus; Spores, Bacterial
Año:2018
Volumen:50
Número:1
Página de inicio:3
Página de fin:11
DOI: http://dx.doi.org/10.1016/j.ram.2017.04.002
Título revista:Revista Argentina de Microbiologia
Título revista abreviado:Rev. Argent. Microbiol.
ISSN:03257541
CODEN:RAMID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03257541_v50_n1_p3_Ferrario

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Citas:

---------- APA ----------
Ferrario, M.I. & Guerrero, S.N. (2018) . Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels . Revista Argentina de Microbiologia, 50(1), 3-11.
http://dx.doi.org/10.1016/j.ram.2017.04.002
---------- CHICAGO ----------
Ferrario, M.I., Guerrero, S.N. "Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels " . Revista Argentina de Microbiologia 50, no. 1 (2018) : 3-11.
http://dx.doi.org/10.1016/j.ram.2017.04.002
---------- MLA ----------
Ferrario, M.I., Guerrero, S.N. "Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels " . Revista Argentina de Microbiologia, vol. 50, no. 1, 2018, pp. 3-11.
http://dx.doi.org/10.1016/j.ram.2017.04.002
---------- VANCOUVER ----------
Ferrario, M.I., Guerrero, S.N. Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels . Rev. Argent. Microbiol. 2018;50(1):3-11.
http://dx.doi.org/10.1016/j.ram.2017.04.002