Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.14/7413 |
Resumo: | The effectiveness of ozone in aqueous solution treatment on microbial inactivation was studied for three combinations microorganism/food: Listeria innocua/red bell peppers (artificially inoculated), total mesophiles/strawberries, and total coliforms/watercress, with two concentrations (0.3 and 2.0 ppm). Blanching treatments (50-60 degrees C) were also individually applied and in combination with ozone, for studying possible synergistic effects. In relation to ozone treatments, the highest microbial reductions were obtained for the highest concentration with the highest treatment time (3 min). Under those conditions. L. innocua/peppers, total mesophiles/strawberries and total coliforms/watercress were reduced respectively 2.8 +/- 0.5, 2.3 +/- 0.4 and 1.7 +/- 0.4 log-cycles. However, a substantial portion of the microbial populations were reduced by water washing alone, and the presence of ozone generally added an additional reduction of 0.5-1.0 log-cycles. If ozone at the highest concentration is used, the treatment impacts on L. innocua/peppers and total mesophiles/strawberries load reductions were equivalent to a blanching at 50 degrees C (for the same treatment times). Combining blanching and ozone did not generate synergistic effects, and in some situations microbial reductions were lower than the ones observed when treatments were applied independently. |
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Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercressMicrobial reductionFresh fruit/vegetableAqueous ozoneBlanchingCombined treatmentsThe effectiveness of ozone in aqueous solution treatment on microbial inactivation was studied for three combinations microorganism/food: Listeria innocua/red bell peppers (artificially inoculated), total mesophiles/strawberries, and total coliforms/watercress, with two concentrations (0.3 and 2.0 ppm). Blanching treatments (50-60 degrees C) were also individually applied and in combination with ozone, for studying possible synergistic effects. In relation to ozone treatments, the highest microbial reductions were obtained for the highest concentration with the highest treatment time (3 min). Under those conditions. L. innocua/peppers, total mesophiles/strawberries and total coliforms/watercress were reduced respectively 2.8 +/- 0.5, 2.3 +/- 0.4 and 1.7 +/- 0.4 log-cycles. However, a substantial portion of the microbial populations were reduced by water washing alone, and the presence of ozone generally added an additional reduction of 0.5-1.0 log-cycles. If ozone at the highest concentration is used, the treatment impacts on L. innocua/peppers and total mesophiles/strawberries load reductions were equivalent to a blanching at 50 degrees C (for the same treatment times). Combining blanching and ozone did not generate synergistic effects, and in some situations microbial reductions were lower than the ones observed when treatments were applied independently.ElsevierVeritati - Repositório Institucional da Universidade Católica PortuguesaAlexandre, Elisabete M. C.Santos-Pedro, Dora M.Brandão, Teresa R. S.Silva, Cristina L. M.2012-01-12T10:40:58Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/7413engALEXANDRE, Elisabete M. C... [et al.] - Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress. Journal of Food Engineering. ISSN 0260-8774. Vol. 105, n.º 2 (2011) p. 277–2820260-877410.1016/j.jfoodeng.2011.02.0321873-5770WOS:000290500800011info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-12T17:13:01Zoai:repositorio.ucp.pt:10400.14/7413Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:07:30.087972Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
title |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
spellingShingle |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress Alexandre, Elisabete M. C. Microbial reduction Fresh fruit/vegetable Aqueous ozone Blanching Combined treatments |
title_short |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
title_full |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
title_fullStr |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
title_full_unstemmed |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
title_sort |
Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress |
author |
Alexandre, Elisabete M. C. |
author_facet |
Alexandre, Elisabete M. C. Santos-Pedro, Dora M. Brandão, Teresa R. S. Silva, Cristina L. M. |
author_role |
author |
author2 |
Santos-Pedro, Dora M. Brandão, Teresa R. S. Silva, Cristina L. M. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Veritati - Repositório Institucional da Universidade Católica Portuguesa |
dc.contributor.author.fl_str_mv |
Alexandre, Elisabete M. C. Santos-Pedro, Dora M. Brandão, Teresa R. S. Silva, Cristina L. M. |
dc.subject.por.fl_str_mv |
Microbial reduction Fresh fruit/vegetable Aqueous ozone Blanching Combined treatments |
topic |
Microbial reduction Fresh fruit/vegetable Aqueous ozone Blanching Combined treatments |
description |
The effectiveness of ozone in aqueous solution treatment on microbial inactivation was studied for three combinations microorganism/food: Listeria innocua/red bell peppers (artificially inoculated), total mesophiles/strawberries, and total coliforms/watercress, with two concentrations (0.3 and 2.0 ppm). Blanching treatments (50-60 degrees C) were also individually applied and in combination with ozone, for studying possible synergistic effects. In relation to ozone treatments, the highest microbial reductions were obtained for the highest concentration with the highest treatment time (3 min). Under those conditions. L. innocua/peppers, total mesophiles/strawberries and total coliforms/watercress were reduced respectively 2.8 +/- 0.5, 2.3 +/- 0.4 and 1.7 +/- 0.4 log-cycles. However, a substantial portion of the microbial populations were reduced by water washing alone, and the presence of ozone generally added an additional reduction of 0.5-1.0 log-cycles. If ozone at the highest concentration is used, the treatment impacts on L. innocua/peppers and total mesophiles/strawberries load reductions were equivalent to a blanching at 50 degrees C (for the same treatment times). Combining blanching and ozone did not generate synergistic effects, and in some situations microbial reductions were lower than the ones observed when treatments were applied independently. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 2011-01-01T00:00:00Z 2012-01-12T10:40:58Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.14/7413 |
url |
http://hdl.handle.net/10400.14/7413 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ALEXANDRE, Elisabete M. C... [et al.] - Influence of aqueous ozone, blanching and combined treatments on microbial load of red bell peppers, strawberries and watercress. Journal of Food Engineering. ISSN 0260-8774. Vol. 105, n.º 2 (2011) p. 277–282 0260-8774 10.1016/j.jfoodeng.2011.02.032 1873-5770 WOS:000290500800011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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