Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes

Detalhes bibliográficos
Autor(a) principal: Gomes, Jaime Rocha
Data de Publicação: 2003
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/6145
Resumo: The objective of our work has been the microencapsulation of dyes with lecithin from soybean, with the formation of liposomes, as a substitute for synthetic auxiliaries so as to improve the quality of the effluent. Current scenarios promote the disintegration and leakage of the liposomes, such as, changes in temperature, pH and the use of surfactants. Since dyeing process is a mix of all these parameters, we pretended to study each one separately. Changes in pH at constant temperature induce a release of dye similar with changes in temperature. In acid conditions we found a very fast initial dye release which doesn’t occur in basic conditions. Using carboxyfluorescein, as a pH fluorescence probe, we concluded that the liposome membrane doesn’t protect the liposome interior from changes on the external pH.
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spelling Effect of PH on lhe control release o microencapsulated dye in lecithin liposomesLiposomesDyeThe objective of our work has been the microencapsulation of dyes with lecithin from soybean, with the formation of liposomes, as a substitute for synthetic auxiliaries so as to improve the quality of the effluent. Current scenarios promote the disintegration and leakage of the liposomes, such as, changes in temperature, pH and the use of surfactants. Since dyeing process is a mix of all these parameters, we pretended to study each one separately. Changes in pH at constant temperature induce a release of dye similar with changes in temperature. In acid conditions we found a very fast initial dye release which doesn’t occur in basic conditions. Using carboxyfluorescein, as a pH fluorescence probe, we concluded that the liposome membrane doesn’t protect the liposome interior from changes on the external pH.Taylor & FrancisUniversidade do MinhoGomes, Jaime Rocha20032003-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/6145eng"Journal of Liposome Research". ISSN 0898-2104. 13:2 (2003) 123-130.0898-2104info: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:RCAAP2024-05-11T06:21:51Zoai:repositorium.sdum.uminho.pt:1822/6145Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T06:21:51Repositório 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 Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
title Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
spellingShingle Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
Gomes, Jaime Rocha
Liposomes
Dye
title_short Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
title_full Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
title_fullStr Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
title_full_unstemmed Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
title_sort Effect of PH on lhe control release o microencapsulated dye in lecithin liposomes
author Gomes, Jaime Rocha
author_facet Gomes, Jaime Rocha
author_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Gomes, Jaime Rocha
dc.subject.por.fl_str_mv Liposomes
Dye
topic Liposomes
Dye
description The objective of our work has been the microencapsulation of dyes with lecithin from soybean, with the formation of liposomes, as a substitute for synthetic auxiliaries so as to improve the quality of the effluent. Current scenarios promote the disintegration and leakage of the liposomes, such as, changes in temperature, pH and the use of surfactants. Since dyeing process is a mix of all these parameters, we pretended to study each one separately. Changes in pH at constant temperature induce a release of dye similar with changes in temperature. In acid conditions we found a very fast initial dye release which doesn’t occur in basic conditions. Using carboxyfluorescein, as a pH fluorescence probe, we concluded that the liposome membrane doesn’t protect the liposome interior from changes on the external pH.
publishDate 2003
dc.date.none.fl_str_mv 2003
2003-01-01T00:00:00Z
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/1822/6145
url http://hdl.handle.net/1822/6145
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Journal of Liposome Research". ISSN 0898-2104. 13:2 (2003) 123-130.
0898-2104
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 Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
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 mluisa.alvim@gmail.com
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