Binding of the water of primary hydration to the sodium and cesium salts of deoxyribonucleic acid and potassium hyaluronate

被引:14
作者
Whitson, KB [1 ]
Lukan, AM
Marlowe, RL
Lee, SA
Anthony, L
Rupprecht, A
机构
[1] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA
[2] Univ Tennessee, Dept Phys Geol & Astron, Chattanooga, TN 37403 USA
[3] Univ Stockholm, Arrhenius Lab, Div Phys Chem, S-10691 Stockholm, Sweden
来源
PHYSICAL REVIEW E | 1998年 / 58卷 / 02期
关键词
D O I
10.1103/PhysRevE.58.2370
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Differential scanning calorimetry (DSC) has been used to evaluate the average enthalpy of desorption of the water of primary hydration bound to wet-spun films of potassium hyaluronate (KHA) and CsDNA. The enthalpies were measured to be 0.24 +/- 0.08 eV/H2O molecule for KHA and 0.32 +/- 0.10 eV/H2O molecule for CsDNA. A Kissinger analysis was used to extract the net activation energy (0.61 +/- 0.04 eV) for the desorption of this water from KHA by analyzing DSC data acquired at different heating rates. The average effective force constants at 295 K of this water bound to KHA (63 +/- 3 mu dyn/Angstrom) and NaDNA (17 +/- 4 mu dyn/Angstrom) are determined from Rayleigh scattering of Mossbauer radiation data [G. Albanese, A. Deriu, F. Cavatorta, and A. Rupprecht, Hyperfine Interact. 95, 97 (1995)] via a harmonic approximation.
引用
收藏
页码:2370 / 2377
页数:8
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