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Temperature dependence of dielectric constant at 10 GHz of Na-DNA gels

โœ Scribed by A. Bonincontro; A. Di Biasio; F. Pedone


Publisher
Wiley (John Wiley & Sons)
Year
1986
Tongue
English
Weight
353 KB
Volume
25
Category
Article
ISSN
0006-3525

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โœฆ Synopsis


Permittivity e' and dielectric loss e'' of aqueous Na-DNA gels have been measured at 10 GHz in the temperature interval -15 to + 45ยฐC. The experimental results are analyzed in terms of a threecomponent equation (Na-DNA, interfacial water, bulk water) and yield a value of 35 water molecules/nucleotide interacting with DNA. According to theoretical and experimental data the presence of strongly bonded and weakly bonded water is considered. The modified water exhibits a mean dielectric relaxation time twoor threefold greater than that of bulk water.


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