Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels
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 distribu...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03257541_v50_n1_p3_Ferrario |
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todo:paper_03257541_v50_n1_p3_Ferrario2023-10-03T15:24:23Z Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels Ferrario, M.I. Guerrero, S.N. 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 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 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03257541_v50_n1_p3_Ferrario |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 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 |
| topic_facet |
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 |
| description |
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 |
| format |
JOUR |
| author |
Ferrario, M.I. Guerrero, S.N. |
| author_facet |
Ferrario, M.I. Guerrero, S.N. |
| author_sort |
Ferrario, M.I. |
| title |
Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels |
| title_short |
Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels |
| title_full |
Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels |
| title_fullStr |
Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels |
| title_full_unstemmed |
Inactivation of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice by pulsed light. Influence of initial contamination and required reduction levels |
| title_sort |
inactivation of alicyclobacillus acidoterrestris atcc 49025 spores in apple juice by pulsed light. influence of initial contamination and required reduction levels |
| url |
http://hdl.handle.net/20.500.12110/paper_03257541_v50_n1_p3_Ferrario |
| work_keys_str_mv |
AT ferrariomi inactivationofalicyclobacillusacidoterrestrisatcc49025sporesinapplejuicebypulsedlightinfluenceofinitialcontaminationandrequiredreductionlevels AT guerrerosn inactivationofalicyclobacillusacidoterrestrisatcc49025sporesinapplejuicebypulsedlightinfluenceofinitialcontaminationandrequiredreductionlevels |
| _version_ |
1782031128624889856 |