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IJEB Vol.46(05) [May 2008] >

Title: Nonlinear mechanism for weak photon emission from biosystems
Authors: Brizhik, Larissa
Keywords: Biophoton
Davydov’s solition
Hybrid solition
Radiative life time
Issue Date: May-2008
Publisher: CSIR
Abstract: The nonlinear mechanism for the origin of the weak biophoton emission from biological systems is suggested. The mechanism is based on the properties of solitons that provide energy transfer and charge transport in metabolic processes. Such soliton states are formed in alpha-helical proteins. Account of the electron-phonon interaction in macromolecules results in the self-trapping of electrons in a localized soliton-like state, known as Davydov's solitons. The important role of the helical symmetry of macromolecules is elucidated for the formation, stability and dynamical properties of solitons. It is shown that the soliton with the lowest energy has an inner structure with the many-hump envelope. The total probability of the excitation in the helix is characterized by interspine oscillations with the frequency of oscillations, proportional to the soliton velocity. The radiative life-time of a soliton is calculated and shown to exceed the life-time of an excitation on an isolated peptide group by several orders of magnitude.
Page(s): 353-357
ISSN: 0019-5189
Source:IJEB Vol.46(05) [May 2008]

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