On the mechanism of dielectric relaxation in aqueous DNA solutions

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 molecule...

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Veröffentlicht in:	Biopolymers 1991-09, Vol.31 (10), p.1171-1180
Hauptverfasser:	Saif, B, Mohr, R.K, Montrose, C.J, Litovitz, T.A
Format:	Artikel
Sprache:	eng
Schlagworte:	Analytical, structural and metabolic biochemistry Animals Biological and medical sciences Cattle conductivity dielectric properties DNA DNA - chemistry Dna, deoxyribonucleoproteins Electric Conductivity Fundamental and applied biological sciences. Psychology Models, Chemical Nucleic acids Salts solutions Solutions - chemistry Thymus Gland - chemistry Water - chemistry
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Beschreibung
Zusammenfassung:	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.
ISSN:	0006-3525 1097-0282
DOI:	10.1002/bip.360311005