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Catalysts 2013, 3(2), 584-587; doi:10.3390/catal3020584
Communication

Cellulases in Ionic Liquids—The Long Term Stability of Aspergillus sp. Cellulase

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Received: 12 April 2013 / Revised: 27 May 2013 / Accepted: 4 June 2013 / Published: 13 June 2013
(This article belongs to the Special Issue Ionic Liquids in Catalysis)
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Abstract

It is a well known fact that some ionic liquids (ILs) have the potential to dissolve crystalline, water-insoluble cellulose that could be used as a source of glucose and subsequently derived molecules. Nevertheless, in the presence of high IL concentrations, cellulase activity and, even more so, cellulase stability are still challenging difficulties that need to be overcome. Therefore four fungal cellulase preparations were assayed in the presence of 30% (v/v) of five different ILs. Thereby the cellulase from Aspergillus sp. (Sigma-Aldrich) was not only remarkably active (up to 28 U/mg in 30% (v/v) IL ([BMMIM]Cl)), but furthermore stayed active during several weeks in the presence of 60% (v/v) IL (up to 50% relative activity after 9 weeks).
Keywords: ionic liquid; cellulase; Aspergillus ionic liquid; cellulase; Aspergillus
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ilmberger, N.; Pottkämper, J.; Streit, W.R. Cellulases in Ionic Liquids—The Long Term Stability of Aspergillus sp. Cellulase. Catalysts 2013, 3, 584-587.

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