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Effects of preparative parameters on the properties of chitosan hydrogel beads containing Candida rugosa lipase

Paper ID Volume ID Publish Year Pages File Format Full-Text
11767 757 2004 11 PDF Available
Title
Effects of preparative parameters on the properties of chitosan hydrogel beads containing Candida rugosa lipase
Abstract

The influences of the pH, tripolyphosphate (TPP) concentration, and ionic strength of the gelling medium on the entrapment efficiency, release, and activity of lipase in chitosan hydrogel beads were studied. A solution of Candida rugosa lipase was prepared in a 1.5% w/v chitosan and 1% (v/v) acetic acid medium, and dropped into a TPP solution. Release of lipase in pH 7.2 Tris buffer was monitored over 36 h using the micro BCA protein assay. The activity of the entrapped enzyme was assayed using the Sigma lipase activity method. Following preliminary studies, an experimental design was followed to develop mathematical models that describe bead characteristics as functions of the pH and the TPP concentration in the gelling medium. The pH and the TPP concentration each had an effect on the entrapment, retention, and activity of lipase. Entrapped lipase retained a high degree of activity in multiple reactions. The ionic strength, in the range studied, exerted a minimal effect on bead characteristics. Statistical analysis allowed optimization within the factor space with respect to maximizing the enzyme entrapment efficiency and activity, and also minimizing the amount released after 36 h in the Tris buffer.

Keywords
Chitosan; Candida rugosa lipase; Hydrogel beads; Tripolyphosphate; Enzyme activity
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Effects of preparative parameters on the properties of chitosan hydrogel beads containing Candida rugosa lipase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 13, June 2004, Pages 2645–2655
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