Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6099
Título: Adsorption of protein from several commercial lipase preparations onto a hollow-fiber membrane module
Autor: Balcão, Vitor M.
Vieira, Madalena C.
Malcata, F. Xavier
Data: 1996
Editora: American Chemical Society / American Institute of Chemical Engineers
Citação: BALCÃO, Vitor M. ; VIEIRA, Madalena C. ; MALCATA, F. Xavier - Adsorption of protein from several commercial lipase preparations onto a hollow-fiber membrane module. 12:2 (1996) 164-172
Resumo: Ten commercially available crude preparations of lipase from various microbial sources were adsorbed from aqueous buffers at several initial concentrations onto a bundle of hydrophobic hollow fibers made of poly(propylene) at pH 7.0 and 40 °C. The kinetics of adsorption were evaluated from measurements at various times of the protein content of the supernatant solution (using BSA as equivalent) in a well-mixed reservoir placed in series with the hollow fiber module. Preliminary tracer experiments have indicated that the module and the tank can be simulated as a system consisting of a plug flow reactor in series with a continuous stirred tank reactor. A mechanistic model based on the hydrodynamic assumptions associated with this system coupled with the postulation of two reversible first-order steps for the adsorption of protein was successfully fitted to the experimental data via nonlinear regression analysis. The statistical significance of the model was checked using tests for lack of fit. This work is useful in predicting the time period required to immobilize a (crude) lipase by adsorption onto a hydrophobic hollow fiber module, a configuration which has proved successful in the recent past for the performance of lipase-catalyzed reactions.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6099
Versão do Editor: http://pubs.acs.org/loi/bipret
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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