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dc.contributor.author
Palla, Camila Andrea
dc.contributor.author
Pacheco, Consuelo
dc.contributor.author
Carrin, Maria Elena
dc.date.available
2018-08-17T16:37:08Z
dc.date.issued
2011-08
dc.identifier.citation
Palla, Camila Andrea; Pacheco, Consuelo; Carrin, Maria Elena; Preparation and modification of chitosan particles for Rhizomucor miehei lipase immobilization; Elsevier Science Sa; Biochemical Engineering Journal; 55; 3; 8-2011; 199-207
dc.identifier.issn
1369-703X
dc.identifier.uri
http://hdl.handle.net/11336/56155
dc.description.abstract
Chitosan particles, suitable as immobilization support, were prepared by precipitation and modified by reductive amination in order to graft linear aliphatic chains of 12 carbon atoms to their native amine groups. Their physical characterization was performed by different techniques: differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), air-water contact angle analysis, among others. Lipases from Rhizomucor miehei (RM) were immobilized by adsorption at low ionic strength onto different modified chitosan microspheres. Their ability to catalyze the acidolysis reaction between sunflower oil and palmitic and stearic free fatty acids was evaluated in a solvent medium. Effects of modification conditions on the particles hydrophobic character, lipase adsorption and acidolysis activity were investigated. Modified particles were bigger and more hydrophobic than unmodified ones. The most active biocatalyst achieved a change in the composition of palmitic and stearic acid from a value of 9.6% in the original oil to 49.1% in the final structured lipids, representing an almost 3-fold enzyme hyperactivation. This high conversion was maintained during 7 reuse cycles (168 total hours). The results demonstrated that the chitosan modification was effective in order to adsorb and hyperactivate RM lipases.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Acidolysis
dc.subject
Adsorption
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Chitosan
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Reductive Amination
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Rhizomucor Miehei Lipase
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Structured Lipids
dc.subject.classification
Biotecnología Industrial
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Biotecnología Industrial
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Preparation and modification of chitosan particles for Rhizomucor miehei lipase immobilization
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-11T14:00:08Z
dc.journal.volume
55
dc.journal.number
3
dc.journal.pagination
199-207
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Palla, Camila Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.description.fil
Fil: Pacheco, Consuelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.description.fil
Fil: Carrin, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.journal.title
Biochemical Engineering Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1369703X11001112
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.bej.2011.04.008
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