Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/1822/72864 |
Resumo: | Reports on the effect of droplet size on the oxidative stability of emulsions and nanoemulsions are scarce in the literature and frequently contradictory. Here, we have employed a set of hydroxytyrosol (HT) esters of different hydrophobicity and fish oil-in-water emulsified systems containing droplets of different sizes to evaluate the effect of the droplet size, surfactant, (ΦI) and oil (ΦO) volume fractions on their oxidative stability. To quantitatively unravel the observed findings, we employed a well-established pseudophase kinetic model to determine the distribution and interfacial concentrations of the antioxidants (AOs) in the intact emulsions and nanoemulsions. Results show that there is a direct correlation between antioxidant efficiency and the concentration of the AOs in the interfacial region, which is much higher (20–200 fold) than the stoichiometric one. In both emulsified systems, the highest interfacial concentration and the highest antioxidant efficiency was found for hydroxytyrosol octanoate. Results clearly show that the principal parameter controlling the partitioning of antioxidants is the surfactant volume fraction, ΦI, followed by the O/W ratio; meanwhile, the droplet size has no influence on their interfacial concentrations and, therefore, on their antioxidant efficiency. Moreover, no correlation was seen between droplet size and oxidative stability of both emulsions and nanoemulsions. |
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Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effectsdroplet sizeantioxidant efficiencyinterfacial concentrationhydroxytyrosolemulsionsnanoemulsionspseudophase kinetic modelCiências Agrárias::Biotecnologia Agrária e AlimentarScience & TechnologyReports on the effect of droplet size on the oxidative stability of emulsions and nanoemulsions are scarce in the literature and frequently contradictory. Here, we have employed a set of hydroxytyrosol (HT) esters of different hydrophobicity and fish oil-in-water emulsified systems containing droplets of different sizes to evaluate the effect of the droplet size, surfactant, (ΦI) and oil (ΦO) volume fractions on their oxidative stability. To quantitatively unravel the observed findings, we employed a well-established pseudophase kinetic model to determine the distribution and interfacial concentrations of the antioxidants (AOs) in the intact emulsions and nanoemulsions. Results show that there is a direct correlation between antioxidant efficiency and the concentration of the AOs in the interfacial region, which is much higher (20–200 fold) than the stoichiometric one. In both emulsified systems, the highest interfacial concentration and the highest antioxidant efficiency was found for hydroxytyrosol octanoate. Results clearly show that the principal parameter controlling the partitioning of antioxidants is the surfactant volume fraction, ΦI, followed by the O/W ratio; meanwhile, the droplet size has no influence on their interfacial concentrations and, therefore, on their antioxidant efficiency. Moreover, no correlation was seen between droplet size and oxidative stability of both emulsions and nanoemulsions.All NMR spectra used in the identification of HT derivatives were performed at Material Centre of the University of Porto (CEMUP).MDPIUniversidade do MinhoCosta, MarleneLosada-Barreiro, SóniaBravo-Díaz, CarlosMonteiro, Luís S.Paiva-Martins, Fátima20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/72864engCosta, M.; Losada-Barreiro, S.; Bravo-Díaz, C.; Monteiro, L.S.; Paiva-Martins, F. Interfacial Concentrations of Hydroxytyrosol Derivatives in Fish Oil-in-Water Emulsions and Nanoemulsions and Its Influence on Their Lipid Oxidation: Droplet Size Effects. Foods 2020, 9, 1897. https://doi.org/10.3390/foods91218972304-815810.3390/foods9121897https://www.mdpi.com/2304-8158/9/12/1897info: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:RCAAP2023-07-21T12:26:22Zoai:repositorium.sdum.uminho.pt:1822/72864Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:20:47.514236Repositório 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 |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
title |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
spellingShingle |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects Costa, Marlene droplet size antioxidant efficiency interfacial concentration hydroxytyrosol emulsions nanoemulsions pseudophase kinetic model Ciências Agrárias::Biotecnologia Agrária e Alimentar Science & Technology |
title_short |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
title_full |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
title_fullStr |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
title_full_unstemmed |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
title_sort |
Interfacial concentrations of hydroxytyrosol derivatives in fish oil-in-water emulsions and nanoemulsions and its influence on their lipid oxidation: droplet size effects |
author |
Costa, Marlene |
author_facet |
Costa, Marlene Losada-Barreiro, Sónia Bravo-Díaz, Carlos Monteiro, Luís S. Paiva-Martins, Fátima |
author_role |
author |
author2 |
Losada-Barreiro, Sónia Bravo-Díaz, Carlos Monteiro, Luís S. Paiva-Martins, Fátima |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Costa, Marlene Losada-Barreiro, Sónia Bravo-Díaz, Carlos Monteiro, Luís S. Paiva-Martins, Fátima |
dc.subject.por.fl_str_mv |
droplet size antioxidant efficiency interfacial concentration hydroxytyrosol emulsions nanoemulsions pseudophase kinetic model Ciências Agrárias::Biotecnologia Agrária e Alimentar Science & Technology |
topic |
droplet size antioxidant efficiency interfacial concentration hydroxytyrosol emulsions nanoemulsions pseudophase kinetic model Ciências Agrárias::Biotecnologia Agrária e Alimentar Science & Technology |
description |
Reports on the effect of droplet size on the oxidative stability of emulsions and nanoemulsions are scarce in the literature and frequently contradictory. Here, we have employed a set of hydroxytyrosol (HT) esters of different hydrophobicity and fish oil-in-water emulsified systems containing droplets of different sizes to evaluate the effect of the droplet size, surfactant, (ΦI) and oil (ΦO) volume fractions on their oxidative stability. To quantitatively unravel the observed findings, we employed a well-established pseudophase kinetic model to determine the distribution and interfacial concentrations of the antioxidants (AOs) in the intact emulsions and nanoemulsions. Results show that there is a direct correlation between antioxidant efficiency and the concentration of the AOs in the interfacial region, which is much higher (20–200 fold) than the stoichiometric one. In both emulsified systems, the highest interfacial concentration and the highest antioxidant efficiency was found for hydroxytyrosol octanoate. Results clearly show that the principal parameter controlling the partitioning of antioxidants is the surfactant volume fraction, ΦI, followed by the O/W ratio; meanwhile, the droplet size has no influence on their interfacial concentrations and, therefore, on their antioxidant efficiency. Moreover, no correlation was seen between droplet size and oxidative stability of both emulsions and nanoemulsions. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 2020-01-01T00:00:00Z |
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/1822/72864 |
url |
http://hdl.handle.net/1822/72864 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Costa, M.; Losada-Barreiro, S.; Bravo-Díaz, C.; Monteiro, L.S.; Paiva-Martins, F. Interfacial Concentrations of Hydroxytyrosol Derivatives in Fish Oil-in-Water Emulsions and Nanoemulsions and Its Influence on Their Lipid Oxidation: Droplet Size Effects. Foods 2020, 9, 1897. https://doi.org/10.3390/foods9121897 2304-8158 10.3390/foods9121897 https://www.mdpi.com/2304-8158/9/12/1897 |
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 |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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 |
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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 |
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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) |
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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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