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Antimicrobial and antioxidant properties of chitosan enzymatically functionalized with flavonoids

Paper ID Volume ID Publish Year Pages File Format Full-Text
35134 45077 2009 8 PDF Available
Title
Antimicrobial and antioxidant properties of chitosan enzymatically functionalized with flavonoids
Abstract

Chitosan fibres were grafted with flavonoids using tyrosinase to produce reactive o-quinones which subsequently react with primary amino groups of the chitosan. The reaction mechanism using chemically different flavonoids (flavanols, flavonols, flavone, flavanone, isoflavone) was followed by UV/vis spectroscopy and the successful grafting was demonstrated by ATR-IR spectroscopy, pH potentiometric titration and reflectance measurements. An increase of antioxidant activity of functionalized chitosan fibres using well established methods was found depending on the type of the flavonoid used. In addition, some flavonoids increased antimicrobial activity of chitosan against Bacillus subtillis and Pseudomonas aeruginosa.

Keywords
Chitosan; Flavonoids; Tyrosinase; Grafting; Antioxidant and Antimicrobial activity
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Antimicrobial and antioxidant properties of chitosan enzymatically functionalized with flavonoids
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 44, Issue 7, July 2009, Pages 749–756
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