Application of biodegradable packaging materials in the preservation of minimally processed spinach

Detalhes bibliográficos
Autor(a) principal: Oliveira, Joana Filipa Canha
Data de Publicação: 2021
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/25418
Resumo: Mestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de Lisboa
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spelling Application of biodegradable packaging materials in the preservation of minimally processed spinachBiodegradable packagingpolylactic acidNatureFlex filmsoriented polypropyleneminimally processed spinachMestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de LisboaThe objective of this study was to evaluate if biodegradable films made of Polylactic acid (PLA) and cellulose-based materials (NatureFlex) are potential substitutes for conventional plastic films (oriented polypropylene (OPP)) used in packaging of minimally processed spinach in heat sealed flexible packages. PLA and OPP films presented a negligible water vapour adsorption, independently of the aw value, while NatureFlex showed a higher water vapour adsorption capacity, increasing from 8% (aw= 0.12) to 52% (dry basis) (aw = 0.87). In terms of water vapour permeability, the PLA film showed a higher value (around 1.10 x 10-12 mol.m/(m2.s.Pa)) than NatureFlex (6.32x10-13 mol.m/(m2.s.Pa)) and OPP (8.75 x 10-14 mol.m/ (m2.s.Pa)). In the minimally processed spinach preservation study at 4ºC, the higher weight decrease due to water loss was detected using the NatureFlex film (around 29 % after 10 days). Regarding the gas composition of the packages’ internal atmosphere, those made of PLA were the ones showing a high variation of O2 and CO2 concentrations over time (with values of 8.1 % of O2 and 8.9 % of CO2 after 10 days). This fact was attributed to the low gas permeability of the PLA film (PO2 = 2.97x10-16 m2/s; PCO2 = 1.22x10-15 m2/s). The effect of the different materials tested on spinach texture, antioxidant activity and microbial growth, was not significantly different during 10 days at 4ºC. Based on all the results obtained from the biodegradable films tested, PLA is the one with a higher potential to be used in minimally processed spinach packagings.n.Alves, Vítor DelgadoMartins, Margarida MoldãoRepositório da Universidade de LisboaOliveira, Joana Filipa Canha20212025-09-01T00:00:00Z2021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/25418engOliveira, J.F.C. - Application of biodegradable packaging materials in the preservation of minimally processed spinach. Lisboa: ISA, 2021, 69 p.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:54:58Zoai:www.repository.utl.pt:10400.5/25418Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:09:17.799716Repositório 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 Application of biodegradable packaging materials in the preservation of minimally processed spinach
title Application of biodegradable packaging materials in the preservation of minimally processed spinach
spellingShingle Application of biodegradable packaging materials in the preservation of minimally processed spinach
Oliveira, Joana Filipa Canha
Biodegradable packaging
polylactic acid
NatureFlex films
oriented polypropylene
minimally processed spinach
title_short Application of biodegradable packaging materials in the preservation of minimally processed spinach
title_full Application of biodegradable packaging materials in the preservation of minimally processed spinach
title_fullStr Application of biodegradable packaging materials in the preservation of minimally processed spinach
title_full_unstemmed Application of biodegradable packaging materials in the preservation of minimally processed spinach
title_sort Application of biodegradable packaging materials in the preservation of minimally processed spinach
author Oliveira, Joana Filipa Canha
author_facet Oliveira, Joana Filipa Canha
author_role author
dc.contributor.none.fl_str_mv Alves, Vítor Delgado
Martins, Margarida Moldão
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Oliveira, Joana Filipa Canha
dc.subject.por.fl_str_mv Biodegradable packaging
polylactic acid
NatureFlex films
oriented polypropylene
minimally processed spinach
topic Biodegradable packaging
polylactic acid
NatureFlex films
oriented polypropylene
minimally processed spinach
description Mestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de Lisboa
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-01-01T00:00:00Z
2025-09-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/25418
url http://hdl.handle.net/10400.5/25418
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Oliveira, J.F.C. - Application of biodegradable packaging materials in the preservation of minimally processed spinach. Lisboa: ISA, 2021, 69 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv s.n.
publisher.none.fl_str_mv s.n.
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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