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Continuous production of oligofructose syrup from Jerusalem artichoke juice by immobilized endo-inulinase

Paper ID Volume ID Publish Year Pages File Format Full-Text
35390 45088 2011 6 PDF Available
Title
Continuous production of oligofructose syrup from Jerusalem artichoke juice by immobilized endo-inulinase
Abstract

A commercially available endo-inulinase from Aspergillus niger was successfully immobilized onto a chitin carrier with 66% yield. The immobilized endo-inulinase showed maximal activity at 65 °C that was 5 °C higher than the optimum temperature of the free enzyme. Also, the optimum pH shifted from 4.5 to 5.0 for free form and 5.5 to 6.0 for the immobilized form. The immobilized endo-inulinase was stable at 4 °C for at least 1 year. The residual activity of 90% and 95% of free and immobilized enzymes were recovered after 5 days of incubation without substrate at 60 °C and pH between 4.5 and 6.5. Kinetic parameters (Km and Vmax) for free and immobilized endo-inulinase were 2.04% (w/v) and 80.88 U/mg protein, and 2.19% (w/v) and 291.58 U/g support, respectively. The half-life time of immobilized endo-inulinase in a packed-bed column reactor was estimated to be 48 days. A continuous production system of inulo-oligosaccharides (IOS) from inulin and Jerusalem artichoke (JA) juice was set up and operated. Using this system, syrups with high IOS content (from 35% to 65%) were successfully prepared.

Keywords
Inulinase; Inulo-oligosaccharides; Prebiotics; Immobilization; Bioconversion
First Page Preview
Continuous production of oligofructose syrup from Jerusalem artichoke juice by immobilized endo-inulinase
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 1, January 2011, Pages 298–303
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering