Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/6145

TitleEffect of PH on lhe control release o microencapsulated dye in lecithin liposomes
Author(s)Gomes, Jaime Rocha
KeywordsLiposomes
Dye
Issue date2003
PublisherTaylor and Francis
JournalJournal of Liposome Research
Citation"Journal of Liposome Research". ISSN 0898-2104. 13:2 (2003) 123-130.
Abstract(s)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.
TypeArticle
URIhttp://hdl.handle.net/1822/6145
ISSN0898-2104
Peer-Reviewedyes
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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