Influences of temperature and solvent ions in solution on states and properties of deoxyribonucleic acid (DNA)

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	Influences of temperature and solvent ions in solution on states and properties of deoxyribonucleic acid (DNA)
	X. F. Pang; Y. Y. Feng; H. W. Zhang; A. F. Jalbout; R. X. Dong
	2005
发表期刊	Communications in Theoretical Physics
ISSN	0253-6102
卷号	43 期号:6 页码:1141-1152
摘要	We here study the influences of the temperature and solvent ions in solution on the states and properties of DNA by a new dynamical model. This model admits three degrees of freedom per base-pair: two displacement variables related to the vibrations of the hydrogen atom in the hydrogen bonds and base (nucleotide), respectively, and an angular variable related to the rotation of each base, which delineate different forms of motion of the hydrogen atom and bases and the relations among them. In this -model we stress specially the important role of the hydrogen atom in the hydrogen bonds of the bases in the dynamics of DNA. According to their properties of motion we give the Hamiltonian of the system and the corresponding equations of motion, and End out their soliton solutions. The solitons formed by the displacements of the hydrogen atoms and bases and their rotations are the excitation states arising from the energy absorbed by the DNA working at the biological temperature. We give further the free energy of the thermal excitation state in DNA system by transfer integral way and End out the corresponding specific heat. The specific heat increases with the increasing of the temperature and concentration of the solvent ions in the solution, but is not linear changes in the region of high temperature. If compared with experimental data, they are approximately consistent. Meanwhile we End that the solvent ion conceptration influences seriously on the stability, states, and configurations of DNA.
部门归属	univ elect sci & technol china, inst life sci & technol, chengdu 610054, peoples r china. natl univ singapore, dept phys, singapore 119260, singapore. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;pang, xf (reprint author), univ elect sci & technol china, inst life sci & technol, chengdu 610054, peoples r china
关键词	Dynamical Property Dna Nonlinearity Soliton Solvent Ion Specific Heat Breather Trapping Mechanism Consistent Phonon Theory Klein-gordon Lattices One-dimensional Model Peyrard-bishop Model Hydrogen-bond Statistical-mechanics Double Helices Vibrational-modes Nonlinear Model
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WOS记录号	WOS:000230064700037
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34996
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. F. Pang,Y. Y. Feng,H. W. Zhang,et al. Influences of temperature and solvent ions in solution on states and properties of deoxyribonucleic acid (DNA)[J]. Communications in Theoretical Physics,2005,43(6):1141-1152.
APA	X. F. Pang,Y. Y. Feng,H. W. Zhang,A. F. Jalbout,&R. X. Dong.(2005).Influences of temperature and solvent ions in solution on states and properties of deoxyribonucleic acid (DNA).Communications in Theoretical Physics,43(6),1141-1152.
MLA	X. F. Pang,et al."Influences of temperature and solvent ions in solution on states and properties of deoxyribonucleic acid (DNA)".Communications in Theoretical Physics 43.6(2005):1141-1152.