title: Simple combined model for nonlinear excitations in DNA.
abstract: We propose a simple model for DNA denaturation bases on the pendulum model of Englander [Proc. Natl. Acad. Sci. U.S.A. 77, 7222 (1980)] and the microscopic model of Peyrard and Bishop [Phys. Rev. Lett. 62, 2755 (1989)], so-called "combined model." The main parameters of our model are the coupling constant k along each strand, the mean stretching y* of the hydrogen bonds, the ratio of the damping constant and driven force gamma/F. We show that both the length L of unpaired bases and the velocity v of kinks depend on not only the coupling constant k but also the temperature T. Our results are in good agreement with previous works.
authors.affiliation: Institute of Physics and Electronics, P. O. Box 429, Boho, Hanoi 10000, Vietnam.
authors.forename: D L
authors.initials: DL
authors.lastname: Hien
authors.forename: N T
authors.initials: NT
authors.lastname: Nhan
authors.forename: V Thanh
authors.initials: VT
authors.lastname: Ngo
authors.forename: N A
authors.initials: NA
authors.lastname: Viet
mesh_terms: D001482:Base Composition; D001703:Biophysics / Q000379:methods*; D003198:Computer Simulation; D004247:DNA / Q000737:chemistry*; D006860:Hydrogen Bonding; D008954:Models, Biological; D008958:Models, Molecular; D015233:Models, Statistical; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D009690:Nucleic Acid Conformation; D013696:Temperature; D013816:Thermodynamics
chemical_list: D004247:DNA