Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/8250
Título: | ΔG(CH2) in PEG-Salt and Ucon-Salt Aqueous Two-Phase Systems |
Autor(es): | Silvério, Sara C. Madeira, Pedro Rodríguez, Oscar Teixeira, J. A. Macedo, Eugénia |
Data: | Jul-2008 |
Editora: | American Chemical Society |
Revista: | Journal of Chemical & Engineering Data |
Citação: | "Journal of Chemical & Engineering Data". Issn 0021-9568. 53:7 (july 2008) 1622-1625. |
Resumo(s): | Three 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/8250 |
DOI: | 10.1021/je800154y |
ISSN: | 0021-9568 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Silverio_JCED[1].pdf | 89,2 kB | Adobe PDF | Ver/Abrir |