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  • Title: Dielectric response of deeply supercooled hydration water in the connective tissue proteins collagen and elastin.
    Author: Gainaru C, Fillmer A, Böhmer R.
    Journal: J Phys Chem B; 2009 Sep 24; 113(38):12628-31. PubMed ID: 19719094.
    Abstract:
    The low-temperature dielectric relaxation of collagen and elastin was studied over a wide range of hydrations h. The hydration-shell response increases weakly with temperature, is thermally activated, and conforms to energy barrier scaling. This demonstrates the existence of a decoupled, secondary relaxation akin to that in binary structural glasses. Indications for fragile-to-strong transitions and other changes of mechanism are not found for hydrated collagen and elastin. For low h, the dielectric strength increases superlinearly with h; concomitantly, the water molecules trigger significant mobility of the protein surface.
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