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- W1980715461 abstract "► Individual molecules and their aggregates can be distinguished within a population. ► Apparent density is an important parameter in polymer and aggregate characterization. ► Results give insight into the structure and conformation of β-glucan aggregates. In this paper we study the properties of molecular and supra molecular species in cereal β-glucan solutions/dispersions by the utilization of asymmetrical flow field-flow fractionation coupled to multi-angle light scattering and refractive index (AsFlFFF-MALS-RI) detectors. The samples were purified barley and oat β-glucans which were dissolved in aqueous solution using either mild conditions or more harsh treatments with alkali. Dissolution in 0.5 M NaOH was not sufficient to eliminate aggregated structures in barley β-glucan. The results in this paper show how distinction can possibly be made between molecular and supra molecular species using scaling approaches and conformational parameters obtained from AsFlFFF-MALS-RI over the entire size distribution. Small species in the barley β-glucan samples display properties ranging from elongated conformation to random coil conformation. Aggregates have low apparent densities and a swollen micro gel structure. Oat β-glucan displays no properties that can be attributed to a molecularly dissolved β-glucan showing that dissolution was incomplete. The aggregate properties analyzed were similar between oat and barley β-glucan." @default.
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- W1980715461 date "2012-01-01" @default.
- W1980715461 modified "2023-10-17" @default.
- W1980715461 title "Asymmetrical flow field-flow fractionation enables the characterization of molecular and supramolecular properties of cereal β-glucan dispersions" @default.
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- W1980715461 doi "https://doi.org/10.1016/j.carbpol.2011.08.014" @default.
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