Soybean B-Glucosidase immobilisated on chitosan beads and its application in soy drink increase the Aglycones.
2014
GRADE, L. C. | MOREIRA, A. A. | VAREA, G. da S. | MANDARINO, J. M. G. | SILVA, J. B. da | IDA, E. I. | RIBEIRO, M. L. L. | LUCIANA CARVALHO GRADE, UEL; AMANDA ALEIXO MOREIRA, UEL; GENI DA SILVA VAREA, UEL; JOSÉ MARCOS GONTIJO MANDARINO, CNPSO; JOSEMEYRE BONIFÁCIO DA SILVA, UEL; ELZA IOUKO IDA, UEL; MARA LÚCIA LUIZ RIBEIRO, UEL.
The objective of this study was to investigate the immobilisation efficiency of soybean β-glucosidase (181.6 U/mL; 23.8 mg protein/mL) on activated chitosan beads. Central Composite Rotational Design (CCDR) 2 was used and the application of immobilised enzyme in commercial soy drink was evaluated. The activation of chitosan beads was achieved with established 2.5% glutaraldehyde, pH 7.5, 8 h incubation time (6 h with agitation and 2 h without agitation) at 37ºC. The highest immobilisation efficiency (%) of soybean β-glucosidase on chitosan beads obtained was 37.74 U/mL and 18.84 mg protein/4 chitosan beads at pH 7.5 and 20 h coupling time of enzyme-matrix (7 h with agitation and 13 h without agitation) at 4ºC. The immobilised enzyme incubated at 50ºC, pH 5.5 resulted in 24% increase in the aglycones content in commercial soy drink after 60 min.
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