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https://hdl.handle.net/1822/9569
Título: | Thermodynamic studies of partitioning behavior of lysozyme and conalbumin in aqueous two-phase systems |
Autor(es): | Sousa, Rita de Cássia Superbi de Coimbra, Jane Sélia dos Reis Silva, Luis Henrique Mendes da Silva, Maria do Carmo Hespanhol da Rojas, Edwin Elard Garcia Vicente, A. A. |
Palavras-chave: | Aqueous two-phase systems Egg white protein Conalbumin Lysozyme Thermodynamic parameters |
Data: | 2009 |
Editora: | Elsevier B.V. |
Revista: | Journal of Chromatography B |
Citação: | "Journal of Chromatography B". ISSN1570-0232. 877 (2009) 2579–2584. |
Resumo(s): | The objective of this study was to determine the thermodynamic parameters (ΔtrG, ΔtrH and ΔtrS) associated with lysozyme and conalbumin partitioning in aqueous two-phases systems (ATPS). Influence of salt type and polyethylene glycol (PEG) concentrations on the partition coefficient of lysozyme and conalbumin from egg white was studied. The evaluated ATPS were composed of PEG 1500 and inorganic salts (sodium citrate and sodium sulfate) at a temperature of 25 °C and pH 7.0, with PEG 1500 g mol−1 concentrations of 14%, 16% and 18% (mass basis). Partitioning of lysozyme in PEG–citrate ATPS was enthalpically driven, however the PEG–sulfate ATPS was entropically driven. The tested systems can be employed for the separation of these two proteins in egg white, due to the fact that lysozyme migrates toward the polymeric phase and conalbumin to the saline phase in both ATPS. A high recovery of conalbumin in the saline phase of the PEG–sulfate ATPS was determined to be enthalpically driven. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/9569 |
DOI: | 10.1016/j.jchromb.2009.07.002 |
ISSN: | 1570-0232 |
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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Sousa_JChromB.pdf | 251,61 kB | Adobe PDF | Ver/Abrir |