关于DNA水溶液中介电弛豫的机制
On the mechanism of dielectric relaxation in aqueous DNA solutions.
作者信息
Saif B, Mohr R K, Montrose C J, Litovitz T A
机构信息
Vitreous State Laboratory, Catholic University of America, Washington, DC 20064.
出版信息
Biopolymers. 1991 Sep;31(10):1171-80. doi: 10.1002/bip.360311005.
PMID:1790296
Abstract
The complex dielectric response of calf thymus DNA in aqueous saline solutions has been measured from 1 MHz to 1 GHz. The results are presented in terms of the relaxation of the incremental contributions to the permittivity and conductivity from the condensed counterions surrounding the DNA molecules. Measurements of the low-frequency conductivity of the samples also lends support to the condensed counterion interpretation.
摘要
已测量了小牛胸腺DNA在盐水溶液中从1兆赫兹到1吉赫兹的复介电响应。结果以DNA分子周围凝聚抗衡离子对介电常数和电导率的增量贡献的弛豫来表示。对样品低频电导率的测量也支持了凝聚抗衡离子的解释。
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