AGRE-0011 Production of a Precursor (Rhamnose) for the Synthesis of Flavouring by Using a Starch Derivative

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Biological Conversion : ECLAIR Cluster III - Carbohydrates : Flavours/Fragrances : Starch

AGRE-0011 Production of a Precursor (Rhamnose) for the Synthesis of Flavouring by Using a Starch Derivative June 1991 - July 1992

L-rhamnose is a natural sugar found in several animal, plant and bacterial polysaccharides. Commercially available rhamnose is produced by chemical hydrolysis of arabic and karaya gums, or from rutin or citrus fruits which contain by weight 10-30% rhamnose. Rhamnose is a raw material for the chemical synthesis of furaneol, a strawberry flavour. At present this is dependent on chemical synthesis, whilst direct extraction from fruits is costly and subject to seasonal variations in supply volume and quality. As a result of this project, worldwide patents have been deposited by BioEurope covering a strain of the bacteria Klebsiella terrigena and the production process for obtaining an exopolysaccharide containing 50% rhamnose. This polysaccharide can be used as is or, after hydrolysis, as a source of rhamnose for the synthesis of natural aroma compounds such as furaneol.

Contacts

Coordinator

• BIOEUROPE FRANCE

EC Scientific Officer

• Ciarán MANGAN / European Commission - DG Research Quality of Life Programme - Unit B1.2 / BELGIUM