Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure

The impact of pulsed light (PL) fluence on reduction of Aspergillus carbonarius and Aspergillus flavus conidia in barley grains (aw 0.60 and 0.98), germinability and structure was studied. Treatments were done for 5–75 s at 5 and 10 cm distance from the flash lamp (fluence: 11.0–165.8 J/cm2 at 5 cm,...

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Autores principales:	Zenklusen, M.H., Coronel, M.B., Castro, M.Á., Alzamora, S.M., González, H.H.L.
Formato:	JOUR
Materias:	Aspergillus Caryopsis structure Germination capacity Inactivation Malting barley Pulsed light Cultivation Fungi Grain (agricultural product) Light Optical microscopy Aspergillus carbonarius Aspergillus flavus Intense light pulse Structure elements
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_14668564_v45_n_p161_Zenklusen
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_14668564_v45_n_p161_Zenklusen
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spelling	todo:paper_14668564_v45_n_p161_Zenklusen2023-10-03T16:17:24Z Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure Zenklusen, M.H. Coronel, M.B. Castro, M.Á. Alzamora, S.M. González, H.H.L. Aspergillus Caryopsis structure Germination capacity Inactivation Malting barley Pulsed light Cultivation Fungi Grain (agricultural product) Light Optical microscopy Aspergillus carbonarius Aspergillus flavus Germination capacity Inactivation Intense light pulse Malting barley Pulsed light Structure elements Aspergillus The impact of pulsed light (PL) fluence on reduction of Aspergillus carbonarius and Aspergillus flavus conidia in barley grains (aw 0.60 and 0.98), germinability and structure was studied. Treatments were done for 5–75 s at 5 and 10 cm distance from the flash lamp (fluence: 11.0–165.8 J/cm2 at 5 cm, and 6.0–89.6 J/cm2 at 10 cm). Maximum reduction in fungal population was 1.2–1.7 log cycles up to 5–15 s (fluence: 6.0–18.0 J/cm2). Acceptable germinability values were obtained up to 25 s treatment at 10 cm distance. Light microscopy study supported changes in germinability. Most of the structure elements of the caryopsis were drastically altered with high fluence values, while embryo viability was maintained with doses up to 29.9 J/cm2. PL up to 18.0 J/cm2 could be a nonchemical option to reduce moulds in barley with minor impact on germinability. Industrial relevance text The reduction of fungal load in malting barley will contribute to improve the production process and the quality of beer. The application of intense light pulses up to 18.0 J/cm2 (15 s, 10 cm from the lamp quartz window) could be a potentially suitable nonchemical (residue-free) option to reduce fungal presence in barley grains with minor impact on structure and germinability. © 2017 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14668564_v45_n_p161_Zenklusen
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Aspergillus Caryopsis structure Germination capacity Inactivation Malting barley Pulsed light Cultivation Fungi Grain (agricultural product) Light Optical microscopy Aspergillus carbonarius Aspergillus flavus Germination capacity Inactivation Intense light pulse Malting barley Pulsed light Structure elements Aspergillus
spellingShingle	Aspergillus Caryopsis structure Germination capacity Inactivation Malting barley Pulsed light Cultivation Fungi Grain (agricultural product) Light Optical microscopy Aspergillus carbonarius Aspergillus flavus Germination capacity Inactivation Intense light pulse Malting barley Pulsed light Structure elements Aspergillus Zenklusen, M.H. Coronel, M.B. Castro, M.Á. Alzamora, S.M. González, H.H.L. Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
topic_facet	Aspergillus Caryopsis structure Germination capacity Inactivation Malting barley Pulsed light Cultivation Fungi Grain (agricultural product) Light Optical microscopy Aspergillus carbonarius Aspergillus flavus Germination capacity Inactivation Intense light pulse Malting barley Pulsed light Structure elements Aspergillus
description	The impact of pulsed light (PL) fluence on reduction of Aspergillus carbonarius and Aspergillus flavus conidia in barley grains (aw 0.60 and 0.98), germinability and structure was studied. Treatments were done for 5–75 s at 5 and 10 cm distance from the flash lamp (fluence: 11.0–165.8 J/cm2 at 5 cm, and 6.0–89.6 J/cm2 at 10 cm). Maximum reduction in fungal population was 1.2–1.7 log cycles up to 5–15 s (fluence: 6.0–18.0 J/cm2). Acceptable germinability values were obtained up to 25 s treatment at 10 cm distance. Light microscopy study supported changes in germinability. Most of the structure elements of the caryopsis were drastically altered with high fluence values, while embryo viability was maintained with doses up to 29.9 J/cm2. PL up to 18.0 J/cm2 could be a nonchemical option to reduce moulds in barley with minor impact on germinability. Industrial relevance text The reduction of fungal load in malting barley will contribute to improve the production process and the quality of beer. The application of intense light pulses up to 18.0 J/cm2 (15 s, 10 cm from the lamp quartz window) could be a potentially suitable nonchemical (residue-free) option to reduce fungal presence in barley grains with minor impact on structure and germinability. © 2017 Elsevier Ltd
format	JOUR
author	Zenklusen, M.H. Coronel, M.B. Castro, M.Á. Alzamora, S.M. González, H.H.L.
author_facet	Zenklusen, M.H. Coronel, M.B. Castro, M.Á. Alzamora, S.M. González, H.H.L.
author_sort	Zenklusen, M.H.
title	Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
title_short	Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
title_full	Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
title_fullStr	Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
title_full_unstemmed	Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
title_sort	inactivation of aspergillus carbonarius and aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure
url	http://hdl.handle.net/20.500.12110/paper_14668564_v45_n_p161_Zenklusen
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Inactivation of Aspergillus carbonarius and Aspergillus flavus in malting barley by pulsed light and impact on germination capacity and microstructure

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