pproximately 60, and a degree of substitution smaller than 2 on the basis of one fructose unit.According to a preferred embodiment, the hydrophobic chains have at least one alkyl carbamate group of formula R???NH???CO???, in which R is an alkyl group having 1 to 22 carbon atoms.According to a more preferred embodiment, the hydrophobic chains are lauryl carbamate groups.In particular, by way of non