Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/69643
Type: Artigo de periódico
Title: Horseradish peroxidase enzyme immobilized on titanium(iv) oxide coated cellulose microfibers: Study of the enzymatic activity by flow injection system
Author: daSilva, LRD
Gushikem, Y
Kubota, LT
Abstract: Horseradish peroxidase (HRP) immobilized on TiO2 coated cellulose microfibers was used to study the catalytic oxidation of pyrogallol to purpurogallin in a flow injection (FI) system. The Michaelis-Menten constants for the enzymatic oxidation were determined for the immobilized enzyme, K-m=47 mM and V=22 mu mol min(-1), and compared with those obtained for free enzyme, K-m=11 mM and V=53 mu mol min(-1). The activity of the immobilized enzyme is reduced presumably due to its interaction with the oxide surface. However, the level of activity of the immobilized phase does not decrease with time under the conditions used in the FI system after various operation cycles.
Subject: enzymatic activity
flow injection
horseradish peroxidase
titanium (iv) oxide coated cellulose
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0927-7765(95)01263-X
Date Issue: 1996
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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