Thus, our data above and the data of authors show that both the enthalpy and the entropy contribute to the orientation effect as part of the DNA denaturation process. This effect usually takes place as a result of two permanent dipole-dipole interactions. The connection of the orientation and induction cohesive components to such electrostatic parameters as dipole moment, polarizability, and ionization potential has been discussed by Gardon, Keller, Karger, and Snyder 83 and Munafo, Buchman, Ho, and Kesselring. Parameter δ o of the five-component cohesion parameter set is related to δ p from the three-component cohesion parameter set. Comparing equations 22 and 41 leads to the conclusion that