Temperature dependence of dielectric constant at 10 GHz of Na‐DNA gels | Zendy

Bonincontro A. | Zendy; Di Biasio A. | Zendy; Pedone F. | Zendy

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

Author(s) -

Bonincontro A.,

Di Biasio A.,

Pedone F.

Publication year - 1986

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.360250206

Subject(s) - chemistry , dielectric , relaxation (psychology) , permittivity , aqueous solution , yield (engineering) , dna , analytical chemistry (journal) , molecule , dielectric loss , thermodynamics , chromatography , organic chemistry , materials science , psychology , social psychology , biochemistry , physics , optoelectronics

Permittivity ε′ and dielectric loss ε″ 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 three‐component 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 two‐or threefold greater than that of bulk water.

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