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On the mechanism of dielectric relaxation in aqueous DNA solutions
Author(s) -
Saif B.,
Mohr R. K.,
Montrose C. J.,
Litovitz T. A.
Publication year - 1991
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360311005
Subject(s) - counterion , chemistry , dielectric , relaxation (psychology) , conductivity , aqueous solution , permittivity , chemical physics , interpretation (philosophy) , dna , ion , organic chemistry , materials science , biochemistry , optoelectronics , social psychology , psychology , computer science , programming language
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.