Nonlinear electric properties of DNA solutions | Zendy

Marion C. | Zendy; Bernengo J. C. | Zendy; Hanss M. | Zendy

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Nonlinear electric properties of DNA solutions

Author(s) -

Marion C.,

Bernengo J. C.,

Hanss M.

Publication year - 1976

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.1976.360150213

Subject(s) - electric field , chemistry , harmonic , nonlinear system , intensity (physics) , current (fluid) , deformation (meteorology) , chemical physics , dna , molecule , field (mathematics) , molecular physics , thermodynamics , optics , composite material , physics , materials science , quantum mechanics , organic chemistry , biochemistry , mathematics , pure mathematics

DNA solutions are shown to present a nonlinear electric behavior. This property is measured through the third harmonic current intensity, which appears when the solution is placed in a sinusoidal electric field of moderately high strength (about 100 V·cm −1 ). The influence of different parameters has been examined: fundamental frequency, field strength, concentration, molecular weight, and conformation. By progressive sonication, it is shown that the harmonic current is linearly proportional to the DNA molecular weight, but under an M r of approximately 10 6 , the nonlinear electrical property decreases sharply and its spectrum shows a drastic change. It is thought that the harmonic current is not related to an orientational phenomenon; an explanation based on the electrical deformation of the molecule is suggested.

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