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https://hdl.handle.net/10216/104787
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DC Field | Value | Language |
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dc.creator | Sara C. Silvério | |
dc.creator | Jesús Gracia | |
dc.creator | José A. Teixeira | |
dc.creator | Eugénia A. Macedo | |
dc.date.accessioned | 2022-09-11T11:29:50Z | - |
dc.date.available | 2022-09-11T11:29:50Z | - |
dc.date.issued | 2016 | |
dc.identifier.issn | 0378-3812 | |
dc.identifier.other | sigarra:135764 | |
dc.identifier.uri | https://hdl.handle.net/10216/104787 | - |
dc.description.abstract | The Gibbs free energy of transfer of a methylene group, Delta G*(CH2), is reported as a measure of the relative hydrophobicity of the equilibrium phases. Furthermore, Delta G*(CH2) is a characteristic parameter of each tie-line, and for that reason can be used for comparing different tie-lines of a given aqueous two-phase system (ATPS) or even to establish comparisons among different ATPSs. In this work, the partition coefficients of a series of four dinitrophenylated-amino acids were experimentally determined, at 23 degrees C, in five different tie-lines of PEG8000-(sodium or potassium) citrate ATPSs. Delta G*(CH2) values were calculated from the partition coefficients and used to evaluate the relative hydrophobicity of the equilibrium phases. PEG8000-potassium citrate ATPSs presented larger relative hydrophobicity than PEG8000-sodium citrate ATPSs. Furthermore, the results obtained indicated that the PEG-rich phase (top phase) has higher affinity to participate in hydrophobic hydration interactions than the salt-rich phase (bottom phase). 2015 Elsevier B.V. All rights reserved. | |
dc.language.iso | eng | |
dc.relation | info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e a 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.rights | restrictedAccess | |
dc.subject | Ciências Tecnológicas, Ciências da engenharia e tecnologias | |
dc.subject | Technological sciences, Engineering and technology | |
dc.title | Polyethylene glycol 8000+citrate salts aqueous two-phase systems: Relative hydrophobicity of the equilibrium phases | |
dc.type | Artigo em Revista Científica Internacional | |
dc.contributor.uporto | Faculdade de Engenharia | |
dc.identifier.doi | 10.1016/j.fluid.2015.07.027 | |
dc.identifier.authenticus | P-00G-XBT | |
dc.subject.fos | Ciências da engenharia e tecnologias | |
dc.subject.fos | Engineering and technology | |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
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File | Description | Size | Format | |
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135764.pdf Restricted Access | 297.74 kB | Adobe PDF | Request a copy from the Author(s) |
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