The Nonlinear Effect of the Composite Influence of Red and Blue Light on Bacteria Escherichia coli Viability

A non-linear dependence of the inhibition of E. coli cells is found when irradiated simultaneously with the blue and red regions of the spectrum at a power density of 100 mW/cm2. Such dependence is explained by the assumption of a cascade two-photon absorption of light by DNA molecules with an inter...

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Bibliographic Details
Published in:	Biofizika Vol. 61; no. 2; p. 310
Main Authors:	Lukyanovich, P A, Zon, B A, Grabovich, M Yu, Shchelukhina, E V, Danilova, Yu I, Orlova, M V, Sapeltseva, Yu O, Sinugina, D I
Format:	Journal Article
Language:	Russian
Published:	Russia (Federation) 01-03-2016
Subjects:	DNA Damage - radiation effects Escherichia coli - radiation effects Light Microbial Viability - radiation effects Ultraviolet Rays
Online Access:	Get more information
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Summary:	A non-linear dependence of the inhibition of E. coli cells is found when irradiated simultaneously with the blue and red regions of the spectrum at a power density of 100 mW/cm2. Such dependence is explained by the assumption of a cascade two-photon absorption of light by DNA molecules with an intermediate resonance at cellular chromophores, causing excitation and subsequent DNA damage similar to damage when exposed to UV radiation.
ISSN:	0006-3029