Reference : Enzymatic modifications of sugar in supercritical carbon dioxide
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/23934
Enzymatic modifications of sugar in supercritical carbon dioxide
English
Favrelle, Audrey [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Brognaux, Alison [Université de Liège - ULg > Gembloux Agro-Bio Tech > General and Organic Chemistry Group > >]
Debuigne, Antoine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Deleu, Magali [Université de Liège - ULg > Gembloux Agro-Bio Tech > Industrial Biological Chemistry Group > >]
Nott, Katherine mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > General and Organic Chemistry Group > >]
Wathelet, Jean-Paul [Université de Liège - ULg > Gembloux Agro-Bio Tech > General and Organic Chemistry Group > >]
Blecker, Christophe [Université de Liège - ULg > Gembloux Agro-Bio Tech > The Food Technology Department > >]
Paquot, Michel mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Industrial Biological Chemistry Group > >]
Jérôme, Christine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
7-Jul-2009
No
No
International
Biotrans 2009, 9th International Symposium on Biocatalysis and Biotransformations
05/07/2009 - 09/07/2009
Jean-Louis Reymond, Beatrice Köchli, Lorenz Blum, Ruud von Deursen, Viviana Fluxa, Erika Lüthi, Noéli Maillard, Magdalena Swiderska, Nicolas Uhlich
Berne
Switzerland
[en] green technology ; supercritical carbon-dioxide
[en] Carbohydrates esters are non-ionic surfactants that have a wide range of commercial applications in cosmetic, food and pharmaceutical industry. They are produced from renewable and inexpensive raw materials, are bio-degradable and non-toxic. Chemical synthesis of sugar esters is generally performed at a high temperature in the presence of an alkaline catalyst lead-ing to a mixture of products. In this respect, the corresponding enzyme-catalyzed processes in non-conventional media are more selective. For this purpose, lipases are the most useful enzymes. Moreover, supercritical carbon dioxide (SC-CO2) constitutes an interesting alternative to the organic solvents used in the domain as it is considered to be environmentally frien-dlier and safer. For example, its use reduces the contamination of the final products with residual solvents. This property is particularly valued in food, cosmetic and pharmaceutical industry.
Our work consists to carry out lipase catalyzed sugar modifications in SC-CO2 and to compare the results with those obtained in organic solvents. The effect of these two different media on the enzyme stability and the yield will be described here. Moreover, the impact of various factors such as pressure, temperature, enzyme form (free or immobilized), use of co-solvent, on the course of the sugar esterification will be discussed.
Center for Education and Research on Macromolecules (CERM)
The French Community of Belgium under the scientific « Concerted Research Actions (ARC program) in the frame of the SUPERZYM project
Researchers
http://hdl.handle.net/2268/23934

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