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Activity of magnetite-immobilized catalase in hydrogen peroxide decomposition

Paper ID Volume ID Publish Year Pages File Format Full-Text
18704 42735 2006 8 PDF Available
Title
Activity of magnetite-immobilized catalase in hydrogen peroxide decomposition
Abstract

The present work analyzes the activity in decomposition of H2O2 using magnetite-immobilized catalase. The support of catalase is a glutaraldehyde-treated magnetite (Fe3O4). The data obtained in the H2O2 decomposition are analyzed. The fitting of the initial rate of the H2O2 decomposition versus hydrogen peroxide concentration data is discussed using a specific program for enzyme kinetics modeling (Leonora). The free catalase from Aspergillus niger (3.5 or 10 U/mL) does not show substrate inactivation up to 0.4 M H2O2. The immobilized catalase at low catalyst concentration shows substrate inhibition. Using 1 mg/mL of supported catalase the predicted maximum activity is higher than in the case of the free catalase at similar catalase concentration, although the optimum temperature is lower (40 °C versus 60 °C).

Keywords
Magnetite; Catalase; Hydrogen peroxide; Enzymatic; Supported catalase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 38, Issue 7, 2 May 2006, Pages 1005–1012
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us