Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/8250

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dc.contributor.authorSilvério, Sara C.-
dc.contributor.authorMadeira, Pedro-
dc.contributor.authorRodríguez, Oscar-
dc.contributor.authorTeixeira, J. A.-
dc.contributor.authorMacedo, Eugénia-
dc.date.accessioned2008-11-06T11:56:00Z-
dc.date.available2008-11-06T11:56:00Z-
dc.date.issued2008-07-
dc.identifier.citation"Journal of Chemical & Engineering Data". Issn 0021-9568. 53:7 (july 2008) 1622-1625.-
dc.identifier.issn0021-9568eng
dc.identifier.urihttp://hdl.handle.net/1822/8250-
dc.description.abstractThree new phase diagrams for polymer−salt aqueous two-phase systems (ATPS) at 23 °C are presented. Then, partition coefficients for a series of five dinitrophenylated amino acids were obtained experimentally in five polymer−salt ATPS. The ATPS were obtained combining a polymer, polyethylene glycol (PEG) or Ucon (a random copolymer of 50 % ethylene oxide and 50 % propylene oxide), and a salt (Na2SO4, (NH4)2SO4, or Li2SO4). The series of amino acids allowed the calculation of the free energy of transfer of a methylene group, which is used as a measure of the relative hydrophobicity of the equilibrium phases. Ucon-rich phases proved to have a higher affinity for methylene groups than PEG which suggests a more efficient biphasic separation system with lower cross-contamination.eng
dc.language.isoengeng
dc.publisherAmerican Chemical Societyeng
dc.rightsopenAccesseng
dc.titleΔG(CH2) in PEG-Salt and Ucon-Salt Aqueous Two-Phase Systemseng
dc.typearticlepor
dc.peerreviewedyeseng
sdum.number7eng
sdum.pagination1622–1625eng
sdum.publicationstatuspublishedeng
sdum.volume53eng
oaire.citationStartPage1622por
oaire.citationEndPage1625por
oaire.citationIssue7por
oaire.citationVolume53por
dc.identifier.doi10.1021/je800154y-
dc.subject.wosScience & Technologypor
sdum.journalJournal of Chemical & Engineering Datapor
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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