激光与DNA作用系统的随机混沌研究(英文)  

STUDY ON THE STOCHASTIC CHAOS IN LASER-DNA INTERACTIVE SYSTEM

作　　者：封国林[1,2] 邵耀椿[2] 孙耀东 

机构地区：[1]兰州大学大气科学系,甘肃兰州730000 [2]扬州大学物理系,江苏扬州225002

出　　处：《红外与毫米波学报》2000年第3期169-173,共5页Journal of Infrared and Millimeter Waves

基　　金：江苏省教委自然科学基金!(JW 970 0 2 2 )资助项目&&

摘　　要：通过对激光与 DNA分子相互作用系统的随机动力学方程数值研究 ,发现在小信号绝热近似下 ,适当条件时 ,出现随机混沌 .随机混沌的出现与激光强度有关 ,当激光强度很小时 ,无混沌现象出现 ,意味着小激光强度不能激励 DNA发生变异 .当激光强度达到一定值时 ,出现了混沌 ,会激励 DNA发生变异 .并随着激光强度的增大 ,体系的演化过程的混沌特征就越来越明显 .但同时太强的激光强度引起的混沌非常复杂 ,会使激光与 DNA作用系统的随机不确定性严重 ,带来难以控制的后果 ,可能反而会使 DNA不产生变异 .本文还讨论了激光与 DNA相互作用系统受环境周期变化的影响 .By studying the numerical calculation of the stochastic dynamics equation of the laser DNA interaction, it was found that with the approximation of small signal and adiabatic hypothesis and under suitable conditions, the stochastic chaos will occur in the laser DNA interactive system. The appearance of stochastic chaos is related to the intensity of laser. When it is very weak there is no chaos and this suggests that small intensity of laser does not make DNA mutate. When laser intensity reaches a certain value, chaos appears and makes DNA mutate. With the increase of laser intensity, the characteristic of chaos in the evolution process of system becomes more and more significant. However, laser intensity can not be too strong, otherwise it will cause very complex chaos that makes a severe problem of uncertainty in laser breeding and brings uncontrollable results instead of inducing DNA to mutate. The influence of the periodical change of environment on laser DNA interactive system was discussed, too.

关 键 词：DNA 非线性 随机混沌 激光 

分 类 号：Q631[生物学—生物物理学] Q523