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β-Galactosidase from Aspergillus oryzae immobilized onto different magnetic supports: a comparative experimental and modelling study of the galactooligosaccharides production.

Title
β-Galactosidase from Aspergillus oryzae immobilized onto different magnetic supports: a comparative experimental and modelling study of the galactooligosaccharides production.
Type
Article in International Conference Proceedings Book
Year
2008
Authors
Neri, David
(Author)
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Balcão, Victor
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Costa, Rafael
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Ferreira, Eugénio
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Rodrigues, Lígia
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Carvalho Jr., Luiz
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Teixeira, José
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Conference proceedings International
Pages: 1036-1041
10th International Chemical and Biological Engineering Conference, CHEMPOR 2008
Braga, Portugal, 4 a 6 de Setembro
Scientific classification
FOS: Medical and Health sciences > Other medical sciences
CORDIS: Technological sciences > Technology > Production technology > Food technology ; Technological sciences > Technology > Biotecnology > Food biotechnology ; Natural sciences > Biological sciences > Biological engineering
Other information
Abstract (EN): β-Galactosidase from Aspergillus oryzae is an enzyme with a wide industrial application, mostly in the hydrolysis of lactose and, more recently, in the synthesis of oligosaccharides. Several advantages are associated with the application of immobilized enzymes on magnetic supports. In this work, β-galactosidase was covalently immobilised onto a Polysiloxane-Polyvinyl Alcohol Magnetic Composite (mPOS-PVA), Magnetic Polysiloxane with Polyaniline (mPOS-PANI), Magnetized Dacron (DACRON) and Magnetite with Polyaniline (MAG-PANI) using glutaraldehyde as activating agent being the synthesis of GOS evaluated and compared at different temperatures (30, 40, 50 and 60 oC) and various initial lactose concentration (50, 100, 200, 300, 400 and 500 g/L). The kinetic parameters obtained by fitting the experimental data were compared in order to determine the effect of the immobilization process with different supports on the synthesis of oligosaccharides. These results clearly demonstrate that all supports may be used for β-galactosidase immobilization as, besides improving the enzyme hydrolytic and GOS synthesis properties, its separation from the obtained reaction products is easy to accomplish
Language: Portuguese
Type (Professor's evaluation): Scientific
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Galacto-oligosaccharides production during lactose hydrolysis by free Aspergillus oryzae β-galactosidase and immobilized on magnetic polysiloxane-polyvinyl alcohol (2009)
Article in International Scientific Journal
Neri, David; Balcão, Victor; Costa, Rafael; Rocha, Isabel; Ferreira, Eugénio; Torres, Duarte; Rodrigues, Lígia; Carvalho Jr., Luiz; Teixeira, José
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