title: Dielectric relaxation measurements of 12 kbp plasmid DNA.
abstract: The dielectric properties of 12 kbp plasmid DNA have been measured as a function of temperature in the range 5 degrees C to 40 degrees C. Time domain reflectometry was used to obtain dielectric data over the frequency range from 200 kHz to 3 GHz. Values of the frequency dependent polarisability per DNA macromolecule have been determined from the measurements. Possible mechanisms that could account for the dielectric dispersion are also discussed, in particular the counterion fluctuation model of Manning-Mandel-Oosawa.
authors.affiliation: Bioelectronics Research Centre, Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8LT, UK.
authors.forename: D J
authors.initials: DJ
authors.lastname: Bakewell
authors.forename: I
authors.initials: I
authors.lastname: Ermolina
authors.forename: H
authors.initials: H
authors.lastname: Morgan
authors.forename: J
authors.initials: J
authors.lastname: Milner
authors.forename: Y
authors.initials: Y
authors.lastname: Feldman
mesh_terms: D004553:Electric Conductivity; D010957:Plasmids / Q000737:chemistry*; D011073:Polyamines; D000071228:Polyelectrolytes; D013057:Spectrum Analysis / Q000379:methods; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors
chemical_list: D011073:Polyamines; D000071228:Polyelectrolytes