Dielectric study of the interaction of DNA and water

Author

Anagnostopoulou-Konsta, A. ; Daoukaki-Diamanti, D. ; Pissis, P. ; Sideris, E.

Author_Institution

Nat. Tech. Univ. of Athens, Greece

fYear

1988

fDate

1-3 Sep 1988

Firstpage

271

Lastpage

275

Abstract

The ways in which water molecules bind to DNA are studied with the aid of thermally stimulated depolarization current (TSDC) measurements of hydrated solid DNA samples and dilute aqueous solutions, in the temperature range of 80-300 K. The first two peaks of the recorded spectrum are interpreted on the basis of free water and loosely bound water dipole reorientation, respectively. It is shown that water sorbed up to at least 25% w/w is irrotationally bound to the DNA molecule. Additional dispersions, eliminated with the use of insulating foils, are attributed to space-charge depolarization connected to DC conductivity

Keywords

DNA; dielectric properties of liquids and solutions; molecular biophysics; thermally stimulated currents; 80 to 300 K; DC conductivity; DNA; dipole reorientation; space-charge depolarization; thermally stimulated depolarization current; water molecules; Current measurement; DNA; Dielectric measurements; Insulation; Solid state circuits; Stability; Temperature distribution; Testing; Water; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)

Conference_Location

Oxford

Type

conf

DOI

10.1109/ISE.1988.38562

Filename

38562