Dielectric and viscosity studies on the dipeptides of alanine and glycine
Dielectric and viscosity studies on the dipeptides of alanine and glycine
复制标题
丙氨酸和甘氨酸二肽的介电和粘度研究
DOI：
10.1088/0508-3443/18/7/311
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发表时间：
1967
期刊：
影响因子：
--
通讯作者：
E. Grant
中科院分区：
文献类型：
--
作者：
M. Aaron;E. Grant
研究了二甘氨酸、二甘氨酸、分析甘氨酸和甘氨丙氨酸水溶液在其弛豫区的介电性质。推导出的偶极矩与结构考虑的结果接近，活化热表明，在驰豫过程中，溶质-水氢键被破坏。对于大多数情况，结果可以用具有单一弛豫时间的德拜型色散来表示，但对于0℃下的分析甘氨酸，松弛时间的分布似乎更可能。粘度测量表明，介电松弛和粘度过程在分子水平上有很强的关联性。
The dielectric properties of aqueous solutions of diglycine, dialanine, analyglycine and glycylalanine have been studied in their relaxation region. The deduced dipole moments are close to those expected from structural considerations, and the activation enthalpies suggest that a solute-water hydrogen bond is broken in the relaxation process. For most cases the results can be represented by a Debye-type dispersion with a single relaxation time, but for analylglycine at 0°c a distribution of relaxation times appears more probable. The viscosity measurements indicate that dielectric relaxation and the viscosity process are strongly related at a molecular level.