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Nanosized tin dioxide — Unexplored carrier for lipase immobilization

Paper ID Volume ID Publish Year Pages File Format Full-Text
51591 46847 2011 5 PDF Available
Title
Nanosized tin dioxide — Unexplored carrier for lipase immobilization
Abstract

A lipase from Rhizopus delemar (RhDL) was adsorbed on two tin dioxides with different textural characteristics (nanoSnO2-A-RhD and nanoSnO2-B-RhD). All biochemical characteristics obtained for them were compared with those for RhDL on silica. NanoSnO2-A exhibited the highest protein loading capacity (75%), however, the highest specific activity was measured for nanoSnO2-B-RhD (33.8 U/mg prot.). The immobilization enhanced thermal-, pH- and solvent stability of RhDL. For example, nanoSnO2-A-RhD is still fully active after one-hour heating at 60 °C and preserved 70% of its activity at pH 9. When applied in the isoamyl acetate synthesis, a complete conversion of substrates was obtained with nanoSnO2-A-RhD in hexane and SBA-15-RhD in hexadecane for 12 h. The performance of the three biocatalysts in several consecutive cycles was estimated as well.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Rhizopus delemar lipase was adsorbed on two SnO2 (pore sizes 3.0 and 7.0 nm). ► Thermal-, pH- and solvent stability of the lipase was enhanced upon immobilization. ► Novel biocatalysts have shown good synthetic activity in hydrophobic solvents. ► The novel preparations were applied in six consecutive synthetic cycles.

Keywords
Lipase; Immobilization; Nanosized tin dioxide; SBA-15; Isoamyl acetate
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Nanosized tin dioxide — Unexplored carrier for lipase immobilization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 16, Issue 1, 30 November 2011, Pages 205–209
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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