NDLI: Encapsulation in a sol–gel matrix of lipase from Aspergillus niger obtained by bioconversion of a novel agricultural residue

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Encapsulation in a sol–gel matrix of lipase from Aspergillus niger obtained by bioconversion of a novel agricultural residue

Content Provider	Springer Nature Link
Author	Zubiolo, Claudia Santos, Rafaela Cristiane Andrade Carvalho, Nayara Bezerra Soares, Cleide Mara Faria Lima, Alvaro Silva Aqui Santana, Luciana Cristina Lins
Copyright Year	2014
Abstract	Lipase from Aspergillus niger was obtained from the solid-state fermentation of a novel agroindustrial residue, pumpkin seed flour. The partially purified enzyme was encapsulated in a sol–gel matrix, resulting in an immobilization yield of 71.4 %. The optimum pH levels of the free and encapsulated enzymes were 4.0 and 3.0, respectively. The encapsulated enzyme showed greater thermal stability at temperatures of 45 and 60 °C than the free enzyme. The positive influence of the encapsulation process was observed on the thermal stability of the enzyme, since a longer half-life t 1/2 and lower deactivation constant were obtained with the encapsulated lipase when compared with the free lipase. Kinetic parameters were found to follow the Michaelis–Menten equation. The K m values indicated that the encapsulation process reduced enzyme–substrate affinity and the V max was about 31.3 % lower than that obtained with the free lipase. The operational stability was investigated, showing 50 % relative activity up to six cycles of reuse at pH 3.0 at 37 °C. Nevertheless, the production of lipase from agroindustrial residue associated with an efficient immobilization method, which promotes good catalytic properties of the enzyme, makes the process economically viable for future industrial applications.
Starting Page	1781
Ending Page	1788
Page Count	8
File Format	PDF
ISSN	16157591
Journal	Bioprocess Engineering
Volume Number	37
Issue Number	9
e-ISSN	16157605
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-02-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Agroindustrial residue Microbial enzyme Silica Immobilization Biotechnology Fermentation Industrial and Production Engineering Environmental Engineering/Biotechnology Industrial Chemistry/Chemical Engineering Food Science
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Biotechnology

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Encapsulation in a sol–gel matrix of lipase from Aspergillus niger obtained by bioconversion of a novel agricultural residue

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