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Immobilization of Lipases Produced by the Endophytic Fungus Cercospora kikuchii on Chitosan Microparticles BABT
Carneiro,Lara Aparecida Buffoni Campos; Costa-Silva,Tales Alexandre; Souza,Cláudia Regina Fernandes; Bachmann,Luciano; Oliveira,Wanderley Pereira; Said,Suraia.
This work studied the immobilization of Cercospora kikuchii lipases on chitosan microparticles by chemical attachment on chitosan acetate microparticles activated by glutaraldehyde (CAM) added before or after the enzyme and physical adsorption on highly deacetylated chitosan hydrochloride microparticles (CHM). Lipases covalently immobilized on pre-activated CAM showed better performance retaining 88.4% of the enzymatic activity, with 68.2% of immobilization efficiency (IE). The immobilized enzyme retained an activity of about 53.5 % after five reuses, using p-NPP as substrate. Physical adsorption of lipase onto highly deacetylated CHM showed 46.2 % of enzymatic activity and 28.6% of IE. This immobilized derivative did not lose activity up to 80 days of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme immobilization; Chitosan; Cercospora kikuchii; Lipase.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400578
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