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- W1982118959 abstract "Abstract In chitin, chitin—glucans and some chitosans, cooling to temperatures between −13 and −31°C apparently reduces or breaks linkages between the sheets of chains in their structures. When additionally an alkaline medium of NaOH, KOH or LiCl/amide exists, this tendency to break is strengthened, reaching in all cases solvation and subsequent dissolution. In chitin, the solubilized fractions correspond to the crystalline β-form or to amorphous materials. In chitin—glucans, the solubilized fraction is a disorganized material in which the chitin remains firmly bound to glucan. In a DSC study, the thermal effect that appears at around −22°C is derived from the phase transition between the distorted structure poor in intersheet hydrogen bonding and the undistorted structure rich in intersheet bonding. In chitin, it seems that the phase transition occurs from the β- to the α-form, although a change from a bent to a straightened configuration could also explain it." @default.
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- W1982118959 date "1992-12-01" @default.
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- W1982118959 title "Low temperature thermal behaviour of chitins and chitin—glucans" @default.
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- W1982118959 doi "https://doi.org/10.1016/0040-6031(92)87023-4" @default.
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