Concentration of tea extracts by osmotic evaporation

Detalhes bibliográficos
Autor(a) principal: Marques, Marisa P.
Data de Publicação: 2017
Outros Autores: Alves, Vítor D., Coelhoso, Isabel M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.3390/membranes7010001
Resumo: The authors acknowledge the financial support from Funda??o para a Ci?ncia e a Tecnologia with the projects PEst-OE/AGR/UI0245/2014 and UID/QUI/50006/2013 (LAQV/REQUIMTE).
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spelling Concentration of tea extracts by osmotic evaporationOptimisation of process parameters and effect on antioxidant activityAntioxidant activityMembrane contactorsOsmotic evaporationPhenolic contentTea extract concentrationMaterials Science(all)The authors acknowledge the financial support from Funda??o para a Ci?ncia e a Tecnologia with the projects PEst-OE/AGR/UI0245/2014 and UID/QUI/50006/2013 (LAQV/REQUIMTE).In this work, the concentration process of three different tea extracts (medicinal Rosil No. 6, Black, and Forest Fruit teas) using the osmotic evaporation (OE) process, was studied. The effect of the OE process on the content of phenolic compounds and antioxidant activity was evaluated. The concentration process was carried out in a hollow-fibre membrane contactor with an effective surface area of 0.54 m2. The tea extract was circulated through the shell side of the contactor, while a concentrated osmotic solution (CaCl2 5 M) was circulated inside the fibres. The flux, the driving force, and the mass transfer coefficient were evaluated. A decrease of the water flux over time was observed and was attributed only to the decrease of the driving force, caused by the dilution of the osmotic solution. Using a surface area/feed volume ratio of 774 m2·m-3, it is possible to reach a tea concentration of 40% (w/w) in 5 h, with a constant water flux and without losing the phenolic content and antioxidant potential in most teas.LAQV@REQUIMTEDQ - Departamento de QuímicaRUNMarques, Marisa P.Alves, Vítor D.Coelhoso, Isabel M.2018-07-25T22:07:50Z2017-03-012017-03-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://doi.org/10.3390/membranes7010001eng0076-6356PURE: 2412915http://www.scopus.com/inward/record.url?scp=85009726458&partnerID=8YFLogxKhttps://doi.org/10.3390/membranes7010001info: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:RCAAP2023-07-10T15:45:08ZPortal AgregadorONG
dc.title.none.fl_str_mv Concentration of tea extracts by osmotic evaporation
Optimisation of process parameters and effect on antioxidant activity
title Concentration of tea extracts by osmotic evaporation
spellingShingle Concentration of tea extracts by osmotic evaporation
Marques, Marisa P.
Antioxidant activity
Membrane contactors
Osmotic evaporation
Phenolic content
Tea extract concentration
Materials Science(all)
title_short Concentration of tea extracts by osmotic evaporation
title_full Concentration of tea extracts by osmotic evaporation
title_fullStr Concentration of tea extracts by osmotic evaporation
title_full_unstemmed Concentration of tea extracts by osmotic evaporation
title_sort Concentration of tea extracts by osmotic evaporation
author Marques, Marisa P.
author_facet Marques, Marisa P.
Alves, Vítor D.
Coelhoso, Isabel M.
author_role author
author2 Alves, Vítor D.
Coelhoso, Isabel M.
author2_role author
author
dc.contributor.none.fl_str_mv LAQV@REQUIMTE
DQ - Departamento de Química
RUN
dc.contributor.author.fl_str_mv Marques, Marisa P.
Alves, Vítor D.
Coelhoso, Isabel M.
dc.subject.por.fl_str_mv Antioxidant activity
Membrane contactors
Osmotic evaporation
Phenolic content
Tea extract concentration
Materials Science(all)
topic Antioxidant activity
Membrane contactors
Osmotic evaporation
Phenolic content
Tea extract concentration
Materials Science(all)
description The authors acknowledge the financial support from Funda??o para a Ci?ncia e a Tecnologia with the projects PEst-OE/AGR/UI0245/2014 and UID/QUI/50006/2013 (LAQV/REQUIMTE).
publishDate 2017
dc.date.none.fl_str_mv 2017-03-01
2017-03-01T00:00:00Z
2018-07-25T22:07:50Z
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 https://doi.org/10.3390/membranes7010001
url https://doi.org/10.3390/membranes7010001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0076-6356
PURE: 2412915
http://www.scopus.com/inward/record.url?scp=85009726458&partnerID=8YFLogxK
https://doi.org/10.3390/membranes7010001
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.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
repository.mail.fl_str_mv
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