2. Estimation of Molecular Mobility of Glassy Sugar Materials(the 48th Annual Meeting)
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- KAWAI Kiyoshi
- Department of Food Science and Technology, Tokyo University of Fisheries
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- SUZUKI Toru
- Department of Food Science and Technology, Tokyo University of Fisheries
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- HAGIWARA Tomoaki
- Department of Food Science and Technology, Tokyo University of Fisheries
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- TAKAI Rikuo
- Department of Food Science and Technology, Tokyo University of Fisheries
Bibliographic Information
- Other Title
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- 2. ガラス状態下にある糖類の分子運動性の評価(平成14年度第48回低温生物工学会研究報告)
- ガラス状態下にある糖類の分子運動性の評価
- ガラス ジョウタイ カ ニ アル トウルイ ノ ブンシ ウンドウセイ ノ ヒョウカ
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Description
To obtain the basically knowledge of the molecular mobility of low molecular carbohydrate under the glassy state, the enthalpy relaxation time (τ) of five sugars such as glucose, galactose, maltose, sucrose and trehalose, were examined through aging experiment by using DSC. The glassy samples were aged at several temperatures of (T_g-10) K to (T_g-35) K. The r at each temperature was obtained by fitting Kohlrausch-Williams-Watts (KWW) equation to the time course of enthalpy relaxation amount (ΔH). When the temperature dependence of molecular mobility was assumed as Arrhenius process, the activation energy amount (ΔE) could be estimated. Judging from the ΔE value, it can be considered that the enthalpy relaxation is mainly due to α-relaxation process governing the molecular dynamics. Furthermore, the ΔE was larger in order of trehalose>galactose>sucrose>maltose>glucose. The result would support the explanation of availability of glassy trehalose as lyoprotectant of protein or biosystem under the severe circumstance.
Journal
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- Cryobiology and Cryotechnology
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Cryobiology and Cryotechnology 48 (2), 71-74, 2002
Japanese Society of Cryobiology and Cryotechnology
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Keywords
Details 詳細情報について
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- CRID
- 1390282680064492672
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- NII Article ID
- 110002950826
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- NII Book ID
- AN10448734
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- ISSN
- 24241555
- 13407902
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- NDL BIB ID
- 6540450
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed