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

✍ 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
• DOI: 10.1002/bip.360250206

✦ Synopsis

Permittivity e' and dielectric loss e'' of aqueous Na-DNA gels have been measured at 10 GHz in the temperature interval -15 to + 45°C. 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.