Structured water mobile below the freezing point in aqueous solutions of a triple-helical polysaccharide schizophyllan
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概要
- 論文の詳細を見る
Aqueous solutions of schizophyllan are known to undergo a sharp order-disorder structure transition, where the ordered structure is formed of the side chains of the polysaccharide along with nearby water molecules around its helix core. The structured water in the ordered state is positionally fixed butrotates reacting with an electric field of about 100MHz as detected by time-domain reflectometry. The same method was extended to a wide temperature range between -20 and 30°C encompassing the freezing point of about -6°C. A 17.8wt% D2O solution showed both free and structured water dispersions at 0°C, but only the latter one below the freezing point. Thus we concluded that the structured water around the helix core remains unfrozen and mobile even when the system is frozen and no free water exists.
- 日本学士院の論文
著者
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Yagihara Shin
Department Of Physics Faculty Of Science Tokai University
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Teramoto Akio
Department Of Macromolecular Science Osaka University
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Mashimo Satoru
Department Of Applied Physics Waseda University:(present Address) Department Of Physics Tokai Univer
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Gu Hong
Department Of Macromolecular Science Osaka University
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Miura Nobuhiro
Department Of Mechanical Systems Engineering National Defense Academy
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GU Hong
Department of Chemistry, Faculty of Science and Engineering, Ritsumeikan University,
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YAGIHARA Shin
Department of Physics, Tokai University
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Mashima Satoru
Department of Physics, Tokai University
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MIURA Nobuhiro
Department of Physics, Tokai University
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TERAMOTO Akio
Department of Chemistry, Faculty of Science and Engineering, Ritsumeikan University,
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