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- W2045253642 abstract "The size and shape of β-limit dextrin have been investigated by using pulsed, field-gradient nuclear magnetic resonance and analytical ultracentrifugation. In addition, the β-limit dextrin has been compared with the amylopectin from which it was derived by enzymic hydrolysis. When measuring size and shape, dimethyl sulfoxide was used as the solvent, in order to avoid problems of polymer agggregation. The results suggest that β-limit dextrin is an oblate ellipsoid with an axial ratio of ∼5:1, and the corresponding amylopectin molecule is even flatter. This indicates that the linear segments beyond the final branch-points of amylopectin lie in the plane of its branched core. The study also demonstrated that the density of packing of polymer chains in this branched core is much greater than at the periphery of amylopectin, and that the latter region is the location of the great majority of the nonreducing chains cleaved by beta amylase. Furthermore, the different sized molecules in amylopectin samples appear to undergo the same degree of degradation by this enzyme." @default.
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- W2045253642 date "1987-04-01" @default.
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- W2045253642 title "A comparison of the size and shape of β-limit dextrin and amylopectin using pulsed field-gradient nuclear magnetic resonance and analytical ultracentrifugation" @default.
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- W2045253642 doi "https://doi.org/10.1016/0008-6215(87)80198-2" @default.
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