Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system

Detalhes bibliográficos
Autor(a) principal: Rodríguez, Oscar
Data de Publicação: 2007
Outros Autores: Silvério, Sara C., Madeira, Pedro, Teixeira, J. A., Macedo, Eugénia
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/7348
Resumo: The polyethylene glycol-sodium sulfate aqueous two-phase system has been characterized at 23 °C. Tielines for the phase diagram were obtained experimentally. Phases in equilibrium were characterized by means of the solvatochromic parameters π*, α, and β, which provide a measurement of the polarity/polarizability and the H-bond donor and acceptor abilities, respectively. The ability of the phases to participate in hydrophobic interactions was characterized by means of the free energy of transfer of a methylene group between the conjugated phases, using the partition of a homologous series of dinitrophenylated amino acids. The results show the effect of the presence of polymer and salt in the aqueous phase, and a comparison of both phases with pure water is made.
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spelling Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase systemScience & TechnologyThe polyethylene glycol-sodium sulfate aqueous two-phase system has been characterized at 23 °C. Tielines for the phase diagram were obtained experimentally. Phases in equilibrium were characterized by means of the solvatochromic parameters π*, α, and β, which provide a measurement of the polarity/polarizability and the H-bond donor and acceptor abilities, respectively. The ability of the phases to participate in hydrophobic interactions was characterized by means of the free energy of transfer of a methylene group between the conjugated phases, using the partition of a homologous series of dinitrophenylated amino acids. The results show the effect of the presence of polymer and salt in the aqueous phase, and a comparison of both phases with pure water is made.LSRE-PortoUniversidade Católica PortuguesaEscola Superior de Biotecnologia do PortoFundação para a Ciência e a Tecnologia (FCT)American Chemical SocietyUniversidade do MinhoRodríguez, OscarSilvério, Sara C.Madeira, PedroTeixeira, J. A.Macedo, Eugénia2007-112007-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/7348eng"Industrial Engineering and Chemistry Research". ISSN 0888-5885. 46:24 (Nov. 2007) 8199-8204.0888-588510.1021/ie070473finfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:54:33Zoai:repositorium.sdum.uminho.pt:1822/7348Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:54:07.654970Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
title Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
spellingShingle Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
Rodríguez, Oscar
Science & Technology
title_short Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
title_full Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
title_fullStr Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
title_full_unstemmed Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
title_sort Physicochemical characterization of the PEG8000-Na2SO4 aqueous two-phase system
author Rodríguez, Oscar
author_facet Rodríguez, Oscar
Silvério, Sara C.
Madeira, Pedro
Teixeira, J. A.
Macedo, Eugénia
author_role author
author2 Silvério, Sara C.
Madeira, Pedro
Teixeira, J. A.
Macedo, Eugénia
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Rodríguez, Oscar
Silvério, Sara C.
Madeira, Pedro
Teixeira, J. A.
Macedo, Eugénia
dc.subject.por.fl_str_mv Science & Technology
topic Science & Technology
description The polyethylene glycol-sodium sulfate aqueous two-phase system has been characterized at 23 °C. Tielines for the phase diagram were obtained experimentally. Phases in equilibrium were characterized by means of the solvatochromic parameters π*, α, and β, which provide a measurement of the polarity/polarizability and the H-bond donor and acceptor abilities, respectively. The ability of the phases to participate in hydrophobic interactions was characterized by means of the free energy of transfer of a methylene group between the conjugated phases, using the partition of a homologous series of dinitrophenylated amino acids. The results show the effect of the presence of polymer and salt in the aqueous phase, and a comparison of both phases with pure water is made.
publishDate 2007
dc.date.none.fl_str_mv 2007-11
2007-11-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/7348
url http://hdl.handle.net/1822/7348
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Industrial Engineering and Chemistry Research". ISSN 0888-5885. 46:24 (Nov. 2007) 8199-8204.
0888-5885
10.1021/ie070473f
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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