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Free-radical depolymerization with metallic catalysts of an exopolysaccharide produced by a bacterium isolated from a deep-sea hydrothermal vent polychaete annelid |
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| Authors: | A.-C. Petit, N. Noiret, C. Sinquin, J. Ratiskol, J. Gu zennec,S. Colliec-Jouault |
| Affiliation: | aEcole Nationale Supérieure de Chimie de Rennes, Synthèses et Activations de Biomolécules, CNRS UMR 6052, Institut de Chimie de Rennes, Avenue du Général Leclerc, F-35700 Rennes, France bInstitut Français de Recherche pour l'Exploitation de la Mer, Laboratoire de Biotechnologies et Molécules Marines, Département Valorisation des Produits, BP 21105, 44311 Nantes Cedex 3, France |
| Abstract: | Free-radical depolymerization with metallic catalysts has been investigated to depolymerize an exopolysaccharide (EPS), with a high molecular weight (>106 g/mol), produced by the bacterium Alteromonas macleodii subsp. fijiensis biovar deepsane. Three metals (copper, zinc and manganese) were used either alone or mixed. These metals led to the depolymerization of the high molecular weight bacterial polysaccharide with different efficiency. This study specifies some conditions required to produce, with good reproducibility and yield, EPS derivatives of reduced molecular weight ranging from 100,000 to 20,000 g/mol. The more influential parameters are specified. This is a first study to find suitable industrial conditions in the presence of these metallic catalysts. |
| Keywords: | Metal H2O2 Free-radical depolymerization Bacterial exopolysaccharide |
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