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dc.contributor.author
Hegel, Pablo Ezequiel
dc.contributor.author
Camy, S.
dc.contributor.author
Destrac, P.
dc.contributor.author
Condoret, J. S.
dc.date.available
2018-08-21T15:07:36Z
dc.date.issued
2011-08
dc.identifier.citation
Hegel, Pablo Ezequiel; Camy, S.; Destrac, P.; Condoret, J. S.; Influence of pretreatments for extraction of lipids from yeast by using supercritical carbon dioxide and ethanol as cosolvent; Elsevier Science; Journal of Supercritical Fluids; 58; 1; 8-2011; 68-78
dc.identifier.issn
0896-8446
dc.identifier.uri
http://hdl.handle.net/11336/56319
dc.description.abstract
Saccharomyces cerevisiae is one of the most studied and industrially exploited yeast. It is a non-oleaginous yeast whose lipids are mainly phospholipids. In this work, the extraction of yeast lipids by supercritical carbon dioxide (SCCO2) and ethanol as a co-solvent was studied. In particular our attention was focused on the selectivity toward triglycerides, and in a subsequent extraction of the phospholipids present in the yeast. Indeed CO2 is a non-polar solvent and is not an efficient solvent for the extraction of phospholipids. However, SCCO2 can be used to extract neutral lipids, as triglycerides, and the addition of polar co-solvents like ethanol, at different compositions, allows a more efficient extraction of triglycerides, and also an extraction-fractionation of phospholipids. In this work SCCO2 extractions of a specific membrane complex of S. cerevisiae, obtained from an industrial provider, were carried out at 20 MPa and 40 °C, using ethanol as a co-solvent (9%, w/w). It was shown that different pretreatments are necessary to obtain good extraction yields and have a great impact on the extraction. The kinetic of the extractions were successfully modeled using Sovova's model. From the fitting of the main parameters of the model it was possible to compare the effects of the pretreatments over the yeast material, and to better understand the extraction process. Among the seven tested pretreatments the more appropriate was found to be an acid hydrolysis followed by a methanol maceration.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Modeling
dc.subject
Pretreatments
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Supercritical Co2
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Triglycerides Extraction
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Yeast
dc.subject.classification
Otras Ingeniería Química
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Ingeniería Química
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Influence of pretreatments for extraction of lipids from yeast by using supercritical carbon dioxide and ethanol as cosolvent
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-11T13:59:43Z
dc.journal.volume
58
dc.journal.number
1
dc.journal.pagination
68-78
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Hegel, Pablo Ezequiel. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Camy, S.. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Destrac, P.. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Condoret, J. S.. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia
dc.journal.title
Journal of Supercritical Fluids
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.supflu.2011.04.005
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0896844611001367