Statistic thermodynamic analysis of f ructans - Part 2' Chain configuration parameters of non-branched and branched fructans - Branching structure and molar mass distribution of branched fructans

摘要

Applying statistical thermodynamic models for chain configurations in combination with linkage analysis, molar mass distribution and small angle X-ray scattering data allow the unambiguous structural elucidation of branched fructans. The radius of gyration of fructans can be accurately predicted by applying a random flight model with bond angle restrictions. The structural factor g has been calculated and correlated with experimental data only allowing a comb shaped structure for branched fructans. Aformula for calculating the molar mass distribution of comb shaped branched fructans is proposed. Amalgamation of experimental and theoretical data prove a regular comb shape structure for the branched fructans of 17. maritima, L. bulbiferum and A. tequilana.