Response of some microorganisms to ultraviolet treatment on fresh-cut pear

Ultraviolet energy at a wavelength of 253.7 nm (UV-C) was investigated for its microbicidal effects on pear slices with and without peel. Effectiveness of UV-C light against Listeria innocua ATCC 33090, Listeria monocytogenes ATCC 19114 D, Escherichia coli ATCC 11229, and Zygosaccharomyces bailli NR...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Schenk, Marcela Liliana, Guerrero, Sandra, Alzamora, Stella Maris
Publicado:	2008
Materias:	Fresh-cut pear Microbial inactivation UV-C light Weibull distribution Debaryomyces hansenii Dose range Fresh-cut Inactivation kinetics Inocula Light treatments Listeria innocua Listeria monocytogenes Log reductions Microbial populations Microbicidal effect Monocytogenes Strain response Ultraviolet treatment Diseases Escherichia coli Fruits Listeria Microorganisms Strain Listeria welshimeri Pyrus Zygosaccharomyces Zygosaccharomyces bailii Zygosaccharomyces rouxii
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19355130_v1_n4_p384_Schenk http://hdl.handle.net/20.500.12110/paper_19355130_v1_n4_p384_Schenk
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_19355130_v1_n4_p384_Schenk
record_format	dspace
spelling	paper:paper_19355130_v1_n4_p384_Schenk2023-06-08T16:31:56Z Response of some microorganisms to ultraviolet treatment on fresh-cut pear Schenk, Marcela Liliana Guerrero, Sandra Alzamora, Stella Maris Fresh-cut pear Microbial inactivation UV-C light Weibull distribution Debaryomyces hansenii Dose range Fresh-cut Inactivation kinetics Inocula Light treatments Listeria innocua Listeria monocytogenes Log reductions Microbial inactivation Microbial populations Microbicidal effect Monocytogenes Strain response Ultraviolet treatment UV-C light Diseases Escherichia coli Fruits Listeria Microorganisms Strain Weibull distribution Debaryomyces hansenii Escherichia coli Listeria Listeria innocua Listeria monocytogenes Listeria welshimeri Pyrus Zygosaccharomyces Zygosaccharomyces bailii Zygosaccharomyces rouxii Ultraviolet energy at a wavelength of 253.7 nm (UV-C) was investigated for its microbicidal effects on pear slices with and without peel. Effectiveness of UV-C light against Listeria innocua ATCC 33090, Listeria monocytogenes ATCC 19114 D, Escherichia coli ATCC 11229, and Zygosaccharomyces bailli NRRL 7256 individual strains was tested in both types of pear slices. In a second experiment, strain cocktails of Listeria (L. innocua ATCC 33090; L. innocua CIP 8011 and L. welshimeri BE 313/01), L. monocytogenes (L. monocytogenes ATCC 19114 D, L. monocytogenes ATCC 7644), and yeasts (Z. bailii NRRL 7256, Zygosaccharomyces rouxii ATCC 52519, and Debaryomyces hansenii NRRL 7268) were also used as inocula and compared with single-strain responses. Inoculated pear slices were exposed to a UV-C dose range between 0 and 87 kJ/m 2 and enumerated to determine log reductions of microbial populations. Overall, as UV-C dose was increased (increasing the time of exposure), more inactivation was observed for all species assayed. UV-C irradiation appeared to improve microbial inactivation in pear slices without peel. In most experiments, great log reduction rates were observed at doses between 0 and 15 kJ/m 2 . Inactivation kinetics was successfully fitted using a Weibullian distribution of resistances model. Narrow frequency shapes strongly skewed to the right were obtained. This model offers improved tools for designing and implementing UV-C light treatment and assessing the impact of some microorganisms' disease. © Springer Science + Business Media, LLC 2007. Fil:Schenk, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Guerrero, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alzamora, S.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19355130_v1_n4_p384_Schenk http://hdl.handle.net/20.500.12110/paper_19355130_v1_n4_p384_Schenk
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Fresh-cut pear Microbial inactivation UV-C light Weibull distribution Debaryomyces hansenii Dose range Fresh-cut Inactivation kinetics Inocula Light treatments Listeria innocua Listeria monocytogenes Log reductions Microbial inactivation Microbial populations Microbicidal effect Monocytogenes Strain response Ultraviolet treatment UV-C light Diseases Escherichia coli Fruits Listeria Microorganisms Strain Weibull distribution Debaryomyces hansenii Escherichia coli Listeria Listeria innocua Listeria monocytogenes Listeria welshimeri Pyrus Zygosaccharomyces Zygosaccharomyces bailii Zygosaccharomyces rouxii
spellingShingle	Fresh-cut pear Microbial inactivation UV-C light Weibull distribution Debaryomyces hansenii Dose range Fresh-cut Inactivation kinetics Inocula Light treatments Listeria innocua Listeria monocytogenes Log reductions Microbial inactivation Microbial populations Microbicidal effect Monocytogenes Strain response Ultraviolet treatment UV-C light Diseases Escherichia coli Fruits Listeria Microorganisms Strain Weibull distribution Debaryomyces hansenii Escherichia coli Listeria Listeria innocua Listeria monocytogenes Listeria welshimeri Pyrus Zygosaccharomyces Zygosaccharomyces bailii Zygosaccharomyces rouxii Schenk, Marcela Liliana Guerrero, Sandra Alzamora, Stella Maris Response of some microorganisms to ultraviolet treatment on fresh-cut pear
topic_facet	Fresh-cut pear Microbial inactivation UV-C light Weibull distribution Debaryomyces hansenii Dose range Fresh-cut Inactivation kinetics Inocula Light treatments Listeria innocua Listeria monocytogenes Log reductions Microbial inactivation Microbial populations Microbicidal effect Monocytogenes Strain response Ultraviolet treatment UV-C light Diseases Escherichia coli Fruits Listeria Microorganisms Strain Weibull distribution Debaryomyces hansenii Escherichia coli Listeria Listeria innocua Listeria monocytogenes Listeria welshimeri Pyrus Zygosaccharomyces Zygosaccharomyces bailii Zygosaccharomyces rouxii
description	Ultraviolet energy at a wavelength of 253.7 nm (UV-C) was investigated for its microbicidal effects on pear slices with and without peel. Effectiveness of UV-C light against Listeria innocua ATCC 33090, Listeria monocytogenes ATCC 19114 D, Escherichia coli ATCC 11229, and Zygosaccharomyces bailli NRRL 7256 individual strains was tested in both types of pear slices. In a second experiment, strain cocktails of Listeria (L. innocua ATCC 33090; L. innocua CIP 8011 and L. welshimeri BE 313/01), L. monocytogenes (L. monocytogenes ATCC 19114 D, L. monocytogenes ATCC 7644), and yeasts (Z. bailii NRRL 7256, Zygosaccharomyces rouxii ATCC 52519, and Debaryomyces hansenii NRRL 7268) were also used as inocula and compared with single-strain responses. Inoculated pear slices were exposed to a UV-C dose range between 0 and 87 kJ/m 2 and enumerated to determine log reductions of microbial populations. Overall, as UV-C dose was increased (increasing the time of exposure), more inactivation was observed for all species assayed. UV-C irradiation appeared to improve microbial inactivation in pear slices without peel. In most experiments, great log reduction rates were observed at doses between 0 and 15 kJ/m 2 . Inactivation kinetics was successfully fitted using a Weibullian distribution of resistances model. Narrow frequency shapes strongly skewed to the right were obtained. This model offers improved tools for designing and implementing UV-C light treatment and assessing the impact of some microorganisms' disease. © Springer Science + Business Media, LLC 2007.
author	Schenk, Marcela Liliana Guerrero, Sandra Alzamora, Stella Maris
author_facet	Schenk, Marcela Liliana Guerrero, Sandra Alzamora, Stella Maris
author_sort	Schenk, Marcela Liliana
title	Response of some microorganisms to ultraviolet treatment on fresh-cut pear
title_short	Response of some microorganisms to ultraviolet treatment on fresh-cut pear
title_full	Response of some microorganisms to ultraviolet treatment on fresh-cut pear
title_fullStr	Response of some microorganisms to ultraviolet treatment on fresh-cut pear
title_full_unstemmed	Response of some microorganisms to ultraviolet treatment on fresh-cut pear
title_sort	response of some microorganisms to ultraviolet treatment on fresh-cut pear
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19355130_v1_n4_p384_Schenk http://hdl.handle.net/20.500.12110/paper_19355130_v1_n4_p384_Schenk
work_keys_str_mv	AT schenkmarcelaliliana responseofsomemicroorganismstoultraviolettreatmentonfreshcutpear AT guerrerosandra responseofsomemicroorganismstoultraviolettreatmentonfreshcutpear AT alzamorastellamaris responseofsomemicroorganismstoultraviolettreatmentonfreshcutpear
_version_	1768544615479115776

Response of some microorganisms to ultraviolet treatment on fresh-cut pear

Ejemplares similares