Thermal properties of a DNA denaturation with solvent interaction

In this work we study the effects of the solvent interaction on the nonlinear dynamical structure of a DNA segment, by using a time-independent perturbation approach. Considering a well-known set of values for the spring constant ( k ) and the Morse (solvent) potential parameters D n and a n ( f s and λ s ), we investigate the denaturation temperature profiles of some DNA’s thermodynamical functions, such as the stretching of the hydrogen bonds, the specific heat and the entropy. Besides a sharp thermal profile behavior of these functions, we observe also that the DNA’s melting temperature decreases as the solvent potential increases.