Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/104775
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dc.creatorKamila Wysoczanska
dc.creatorSara Silvério
dc.creatorJosé A. Teixeira
dc.creatorMaria Eugénia Macedo
dc.date.accessioned2019-02-03T20:11:19Z-
dc.date.available2019-02-03T20:11:19Z-
dc.date.issued2015
dc.identifier.issn0021-9614
dc.identifier.othersigarra:135782
dc.identifier.urihttps://repositorio-aberto.up.pt/handle/10216/104775-
dc.description.abstractThe partitioning of four dinitrophenylated (DNP-) amino acids in aqueous two-phase systems of (polyethylene glycol (PEG)-8000 + sodium sulfate) and (polyethylene glycol (PEG)-8000 + magnesium sulfate) in five different tie-lines was experimentally determined at T = 298.15 K. The Gibbs energy of transfer of a methylene group between the two phases was calculated from the measured partition coefficients. This characterizes the relative hydrophobicity of the equilibrium phases. Values of Delta G*(CH2) were in range from (-0.674 to -1.012) kJ.mol(-1). A comparison of both systems was carried out. The results show that the cation type has a strong influence on the amino acids partitioning process. The largest relative hydrophobicity was noted for the ATPS system formed by sodium sulfate. This showed to be a better system for the separation.
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM
dc.rightsrestrictedAccess
dc.subjectCiências Tecnológicas, Ciências da engenharia e tecnologias
dc.subjectTechnological sciences, Engineering and technology
dc.titleCation effect on the (PEG 8000+sodium sulfate) and (PEG 8000+magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.identifier.doi10.1016/j.jct.2015.08.012
dc.identifier.authenticusP-00G-JG2
dc.subject.fosCiências da engenharia e tecnologias
dc.subject.fosEngineering and technology
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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