Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/1822/59339 |
Resumo: | A new antioxidant active packaging film has been developed based on polylactic acid (PLA) in which green tea extract (GTE) has been immobilized by extrusion. Two GTE concentrations were tested, 1% (w/w) and 2% (w/w). Four GT samples were compared regarding their antioxidant capacity (by DPPH radical scavenging method and beta-carotene bleaching method), total phenolics content (TPC) and total flavonoids content (TFC). The commercial GTE presented with highest antioxidant capacity by the DPPH radical assay (EC50 = 0.12 +/- 0.00 mg/mL) and the highest TPC (416 +/- 9.95 mg gallic acid equivalents (GAE)/g extract) and it was selected to be incorporated in the active film. Films were evaluated regarding their mechanical properties (e.g. tensile strength decreased 12% with the incorporation of GTE in the PLA matrix and strain at break increased 9.6 and 36% with the addition of 1 and 2% of GTE) and water vapour transmission rates (water vapour barrier properties improved with the addition of higher amounts of GTE).The study of the effectiveness of PLA/GTE films against lipid oxidation was performed by the following methods: peroxide value, p-anisidine value, thiobarbituric acid reactive substances (TSARS) assay and hexanal monitoring, after packaging smoked salmon slices during different storage times (0, 7, 15, 30, 45 and 60 days). The results showed that the incorporation of GTE in the PLA films protects the smoked salmon from lipid oxidation in the different storage times tested. However, additional studies should be performed to better understand the GTE mechanism of action as the results suggest a pro-oxidant effect of PLA/GTE 2% after 60 days of storage and to evaluate the potential antimicrobial activity of active films. |
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Active polylactic acid film incorporated with green tea extract: Development, characterization and effectivenessActive packagingPolylactic acidGreen tea extractAntioxidant capacitySmoked salmonLipid oxidationScience & TechnologyA new antioxidant active packaging film has been developed based on polylactic acid (PLA) in which green tea extract (GTE) has been immobilized by extrusion. Two GTE concentrations were tested, 1% (w/w) and 2% (w/w). Four GT samples were compared regarding their antioxidant capacity (by DPPH radical scavenging method and beta-carotene bleaching method), total phenolics content (TPC) and total flavonoids content (TFC). The commercial GTE presented with highest antioxidant capacity by the DPPH radical assay (EC50 = 0.12 +/- 0.00 mg/mL) and the highest TPC (416 +/- 9.95 mg gallic acid equivalents (GAE)/g extract) and it was selected to be incorporated in the active film. Films were evaluated regarding their mechanical properties (e.g. tensile strength decreased 12% with the incorporation of GTE in the PLA matrix and strain at break increased 9.6 and 36% with the addition of 1 and 2% of GTE) and water vapour transmission rates (water vapour barrier properties improved with the addition of higher amounts of GTE).The study of the effectiveness of PLA/GTE films against lipid oxidation was performed by the following methods: peroxide value, p-anisidine value, thiobarbituric acid reactive substances (TSARS) assay and hexanal monitoring, after packaging smoked salmon slices during different storage times (0, 7, 15, 30, 45 and 60 days). The results showed that the incorporation of GTE in the PLA films protects the smoked salmon from lipid oxidation in the different storage times tested. However, additional studies should be performed to better understand the GTE mechanism of action as the results suggest a pro-oxidant effect of PLA/GTE 2% after 60 days of storage and to evaluate the potential antimicrobial activity of active films.This work was funded by FEDER, through the Program INTERREG V A Espana Portugal (POCTEP), by the Project 0377_IBERPHENOL_6_E.info:eu-repo/semantics/publishedVersionElsevier Science BVUniversidade do MinhoMartins, CristianaVilarinho, FernandaSilva, Ana SanchesAndrade, MarianaMachado, A. V.Conceicao Castilho, M.Sa, ArsenioCunha, AmericoFatima Vaz, M.Ramos, Fernando2018-11-012018-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/59339eng0926-669010.1016/j.indcrop.2018.06.056info: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:RCAAP2023-07-21T12:33:59Zoai:repositorium.sdum.uminho.pt:1822/59339Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:29:36.241541Repositório 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 |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
title |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
spellingShingle |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness Martins, Cristiana Active packaging Polylactic acid Green tea extract Antioxidant capacity Smoked salmon Lipid oxidation Science & Technology |
title_short |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
title_full |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
title_fullStr |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
title_full_unstemmed |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
title_sort |
Active polylactic acid film incorporated with green tea extract: Development, characterization and effectiveness |
author |
Martins, Cristiana |
author_facet |
Martins, Cristiana Vilarinho, Fernanda Silva, Ana Sanches Andrade, Mariana Machado, A. V. Conceicao Castilho, M. Sa, Arsenio Cunha, Americo Fatima Vaz, M. Ramos, Fernando |
author_role |
author |
author2 |
Vilarinho, Fernanda Silva, Ana Sanches Andrade, Mariana Machado, A. V. Conceicao Castilho, M. Sa, Arsenio Cunha, Americo Fatima Vaz, M. Ramos, Fernando |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Martins, Cristiana Vilarinho, Fernanda Silva, Ana Sanches Andrade, Mariana Machado, A. V. Conceicao Castilho, M. Sa, Arsenio Cunha, Americo Fatima Vaz, M. Ramos, Fernando |
dc.subject.por.fl_str_mv |
Active packaging Polylactic acid Green tea extract Antioxidant capacity Smoked salmon Lipid oxidation Science & Technology |
topic |
Active packaging Polylactic acid Green tea extract Antioxidant capacity Smoked salmon Lipid oxidation Science & Technology |
description |
A new antioxidant active packaging film has been developed based on polylactic acid (PLA) in which green tea extract (GTE) has been immobilized by extrusion. Two GTE concentrations were tested, 1% (w/w) and 2% (w/w). Four GT samples were compared regarding their antioxidant capacity (by DPPH radical scavenging method and beta-carotene bleaching method), total phenolics content (TPC) and total flavonoids content (TFC). The commercial GTE presented with highest antioxidant capacity by the DPPH radical assay (EC50 = 0.12 +/- 0.00 mg/mL) and the highest TPC (416 +/- 9.95 mg gallic acid equivalents (GAE)/g extract) and it was selected to be incorporated in the active film. Films were evaluated regarding their mechanical properties (e.g. tensile strength decreased 12% with the incorporation of GTE in the PLA matrix and strain at break increased 9.6 and 36% with the addition of 1 and 2% of GTE) and water vapour transmission rates (water vapour barrier properties improved with the addition of higher amounts of GTE).The study of the effectiveness of PLA/GTE films against lipid oxidation was performed by the following methods: peroxide value, p-anisidine value, thiobarbituric acid reactive substances (TSARS) assay and hexanal monitoring, after packaging smoked salmon slices during different storage times (0, 7, 15, 30, 45 and 60 days). The results showed that the incorporation of GTE in the PLA films protects the smoked salmon from lipid oxidation in the different storage times tested. However, additional studies should be performed to better understand the GTE mechanism of action as the results suggest a pro-oxidant effect of PLA/GTE 2% after 60 days of storage and to evaluate the potential antimicrobial activity of active films. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-01 2018-11-01T00:00:00Z |
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/1822/59339 |
url |
http://hdl.handle.net/1822/59339 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0926-6690 10.1016/j.indcrop.2018.06.056 |
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 Science BV |
publisher.none.fl_str_mv |
Elsevier Science BV |
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 |
repository.mail.fl_str_mv |
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1799132796540682240 |