By Gerald O. Aspinall

Content material: Frontmatter -- Quantum Dynamical Resonances in Chemical Reactions: From A + BC to Polyatomic platforms / Kopin Liu -- The Multiscale Coarse-Graining approach / Lanyuan Lu, Gregory A Voth -- Molecular Solvation Dynamics from Inelastic X-Ray Scattering Measurements / R H Coridan, G C L Wong -- Polymers less than Confinement / M Muthukumar -- Computational experiences of the houses of DNA-Linked Nanomaterials / One-Sun Lee, George C Schatz -- Nanopores: Single-Molecule Sensors of Nucleic Acid-Based Complexes / Amit Meller -- writer Index -- topic Index

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The results indicated that XGs bind to cellulose as a monolayer and Fucp residues present in the pea XG contribute to the adsorption affinity [253]. The binding ability was demonstrated [254] on a series of XG oligosaccharides (reduced with tritiated sodium borohydride) and tested on amorphous microcrystalline cellulose, and filter paper; it increased with increasing DP of XG if the oligosaccharide contained more than four consecutive (1 → 4)-β-d-Glcp residues. Further studies [255, 256] revealed that storage xyloglucan–cellulose interactions are influenced by the galactosyl side chains and the molecular weight of the XG.

15). However, there is evidence for a minor amount of (1 → 4)-sequences longer than the tetraose type (up to 9–14 Glcp residues were determined), whereas the presence of contiguous β-(1 → 3)-linked Glcp units has not been detected [335]. The fine structure comprising the arrangement of the cellulose-like segments along the chains was suggested to be random. 5 for wheat [317]. Enzyme digestion showed differences in the fine structure among different genera of cereals, but no great variations between samples belonging to the same genera.

It is more widespread than the AG type I and occurs in cell walls of dicots and cereals often linked to proteins (known as arabinogalactan proteins) [373 and references therein]. In some case it contains a small amount of β-GlcA. AG type II comprises, together with GaMs and cellulose, the predominating polysaccharides of green arabica coffee beans [374]. As a component of pectin, it has been very frequently extracted from herbal plants [375, 376]. The acidic AG type II has uronic acid residues incorporated in side chains and belong to the groups of gum exudates [377].

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Polysaccharides by Gerald O. Aspinall


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