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Pulsed Light Inactivation Of Naturally-Occuring Moulds On Wheat Grain.
MedLine Citation:
PMID:  23900889     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Pulsed light (PL) is emerging as a non-thermal technology with excellent prospects for the decontamination of foods and food contact surfaces. Its application for mould inactivation on cereal grains would allow a reduction of storage losses as well as the prevention of mycotoxin contamination at a post-harvest level. The potential of PL for the decontamination of naturally occurring moulds on wheat grain was investigated in this study.
RESULTS: Treatments of up to 40 flashes of a fluence of 0.4 J·cm(-2) ·pulse(-1) were applied to both sides of the grain, with an overall energy release ranging from 6.4 to 51.2 J·g(-1) . The most powerful treatment applied to wheat in this study (51.2 J·g(-1) ) resulted into a mould reduction of approximately 4 log cycles on samples displaying an initial mould contamination level of 2.2·10(5) CFU·g(-1) . At the same time, the seed germination percentage was only slightly affected. For PL treatments causing an inactivation of 3-4 log cycles, only 14-15% of the germination power of the wheat seeds was lost.
CONCLUSION: The PL treatments attained greater microbial reductions for higher treatment times and lower initial mould loads. The absence of the UV portion of the radiation spectrum was found to significantly reduce the treatment effectiveness.
Authors:
Nicoleta Aron Maftei; Ana Y Ramos-Villarroel; Anca I Nicolau; Olga Martín-Belloso; Robert Soliva-Fortuny
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-30
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  -     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-7-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
Affiliation:
Department of Applied Microbiology, Faculty of Food Science and Engineering "Dunarea de Jos" University of Galati, Street: Domneasca No. 111, 800201, Galati, Romania.
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