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Glucose oxidase immobilization on a novel cellulose acetate–polymethylmethacrylate membrane

Paper ID Volume ID Publish Year Pages File Format Full-Text
25764 43597 2006 10 PDF Available
Title
Glucose oxidase immobilization on a novel cellulose acetate–polymethylmethacrylate membrane
Abstract

Glucose oxidase (GOD) was immobilized on cellulose acetate–polymethylmethacrylate (CA–PMMA) membrane. The immobilized GOD showed better performance as compared to the free enzyme in terms of thermal stability retaining 46% of the original activity at 70 °C where the original activity corresponded to that obtained at 20 °C. FT-IR and SEM were employed to study the membrane morphology and structure after treatment at 70 °C. The pH profile of the immobilized and the free enzyme was found to be similar. A 2.4-fold increase in Km value was observed after immobilization whereas Vmax value was lower for the immobilized GOD. Immobilized glucose oxidase showed improved operational stability by maintaining 33% of the initial activity after 35 cycles of repeated use and was found to retain 94% of activity after 1 month storage period. Improved resistance against urea denaturation was achieved and the immobilized glucose oxidase retained 50% of the activity without urea in the presence of 5 M urea whereas free enzyme retained only 8% activity.

Keywords
Cellulose acetate–polymethylmethacrylate (CA–PMMA); Glucose oxidase (GOD); Membrane; Biosensor; Immobilization; FT-IR; SEM
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Glucose oxidase immobilization on a novel cellulose acetate–polymethylmethacrylate membrane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 121, Issue 3, 10 February 2006, Pages 351–360
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us