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<lom:string language="fre">L'industrie agroalimentaire utilise différents polysaccharides à des fins nutritionnelles mais aussi pour améliorer ou modifier les propriétés rhéologiques des produits finis. Ainsi nous trouverons des polysaccharides essentiellement d'origine végétale qui exprimeront des propriétés stabilisantes, épaississantes et gélifiantes. Il est cependant possible de trouver maintenant des polysaccharides de micro-organismes qui possèdent ces mêmes propriétés. Nous aborderons cette étude en différenciant d'une part les polysaccharides qui expriment des propriétés stabilisantes et épaississantes comme l'amidon, la cellulose, les hémicellulose et le xanthane. D'autre part nous aborderons les polysaccharides qui présentent des propriétés gélifiantes comme les carraghénanes, les pectines et les alginates. Quand on module la concentration de ces polysaccharides, ils sont susceptibles de présenter aussi des propriétés stabilisantes et épaississantes.</lom:string>
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N:Duranton;Sylvain;;;
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