ZhETF, Vol. 128,
p. 428 (August 2005)
(English translation - JETP,
Vol. 101, No. 2,
available online at www.springer.com
THE THREE-WAVE INTERACTION BETWEEN INTER-STRAND MODES OF THE DNA
Received: February 21, 2005
We consider the regime in which the bands of the torsional acoustic (TA) and hydrogen-bond-stretch (HBS) modes of the DNA interpenetrate each other. We propose a simple model accommodating the helix structure of the DNA, and, within its framework, find a three-wave interaction between the TA and the HBS modes. The phenomenon could be useful for studying the action of microwave radiation on a DNA molecule. Thus, using Zhang's mechanism of the interaction between the system of electric dipoles of a DNA molecule and the microwave radiation, we show that the latter could bring about torsional vibrations maintaining the HBS-ones. We indicate an estimate of the microwave power density necessary for generating the HBS mode, which essentially depends on the viscous properties of ambient medium.