Application of biodegradable packaging materials in the preservation of minimally processed spinach
Autor(a) principal: | |
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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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7160 |
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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 |
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RCAAP |
institution |
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) |
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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