Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases

Detalhes bibliográficos
Autor(a) principal: Wysoczanska, Kamila
Data de Publicação: 2015
Outros Autores: Silvério, Sara C., Teixeira, J. A., Macedo, Eugénia A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/37134
Resumo: The partitioning of four dinitrophenylated (DNP-) amino acids in aqueous two-phase systems of polyethylene glycol (PEG)-8000sodium sulfate and polyethylene glycol (PEG)-8000magnesium sulfate in five different tie-lines was experimentally determined at 298.15 K. The Gibbs free 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 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.
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spelling Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phasesATPSDNP amino acidsPartitioningPEGSaltsScience & TechnologyThe partitioning of four dinitrophenylated (DNP-) amino acids in aqueous two-phase systems of polyethylene glycol (PEG)-8000sodium sulfate and polyethylene glycol (PEG)-8000magnesium sulfate in five different tie-lines was experimentally determined at 298.15 K. The Gibbs free 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 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.FCT/MEC and FEDER under Programe PT2020 (Project UID/EQU/50020/2013), and co-financed by QREN, ON2 and FEDER (Projects NORTE-07-0162-FEDER-000050 and NORTE-07-0124-FEDER-0000011)ElsevierUniversidade do MinhoWysoczanska, KamilaSilvério, Sara C.Teixeira, J. A.Macedo, Eugénia A.2015-122015-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/37134engWysoczanska, Kamila; Silvério, S.; Teixeira, J. A.; Macedo, Eugénia A., Cation Effect on the (PEG 8000 + sodium sulfate and PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases. Journal of Chemical Thermodynamics, 91, 321-326, 20150021-96141096-362610.1016/j.jct.2015.08.012http://www.sciencedirect.com/science/article/pii/S0021961415002943info: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:RCAAP2023-07-21T12:14:01Zoai:repositorium.sdum.uminho.pt:1822/37134Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:06:14.903917Repositório 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 Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
title Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
spellingShingle Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
Wysoczanska, Kamila
ATPS
DNP amino acids
Partitioning
PEG
Salts
Science & Technology
title_short Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
title_full Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
title_fullStr Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
title_full_unstemmed Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
title_sort Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases
author Wysoczanska, Kamila
author_facet Wysoczanska, Kamila
Silvério, Sara C.
Teixeira, J. A.
Macedo, Eugénia A.
author_role author
author2 Silvério, Sara C.
Teixeira, J. A.
Macedo, Eugénia A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Wysoczanska, Kamila
Silvério, Sara C.
Teixeira, J. A.
Macedo, Eugénia A.
dc.subject.por.fl_str_mv ATPS
DNP amino acids
Partitioning
PEG
Salts
Science & Technology
topic ATPS
DNP amino acids
Partitioning
PEG
Salts
Science & Technology
description The partitioning of four dinitrophenylated (DNP-) amino acids in aqueous two-phase systems of polyethylene glycol (PEG)-8000sodium sulfate and polyethylene glycol (PEG)-8000magnesium sulfate in five different tie-lines was experimentally determined at 298.15 K. The Gibbs free 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 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.
publishDate 2015
dc.date.none.fl_str_mv 2015-12
2015-12-01T00:00:00Z
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/1822/37134
url http://hdl.handle.net/1822/37134
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Wysoczanska, Kamila; Silvério, S.; Teixeira, J. A.; Macedo, Eugénia A., Cation Effect on the (PEG 8000 + sodium sulfate and PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases. Journal of Chemical Thermodynamics, 91, 321-326, 2015
0021-9614
1096-3626
10.1016/j.jct.2015.08.012
http://www.sciencedirect.com/science/article/pii/S0021961415002943
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 Elsevier
publisher.none.fl_str_mv Elsevier
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
repository.mail.fl_str_mv
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