Table of Contents
Laser Chemistry
Volume 5, Issue 1, Pages 19-25

Biostimulating Action of Low-Intensity Monochromatic Visible Light: Is it Possible?

1Laser Technology Center, USSR Acad of Sciences, Moscow Region, Troitzk 142092, Russia
2Cancer Research Center, USSR Acad. Med. Sci., Moscow 114456, Russia
3Institute of Spectroscopy, USSR Academy of Sciences, Moscow Region, Troitzk 142092, Russia
4Institute of Microbiology, USSR Academy of Sciences, Moscow, Russia

Received 17 February 1984

Copyright © 1984 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The quantitative studies with organisms of different complexity (HeLa cells, yeast organisms, E coli bacteria) to prove or disprove the stimulating action of low-intensity visible light are presented. The stimulation of DNA synthesis in HeLa cells was observed for four spectral intervals with maxima at near 400, 620, 680 and 760 nm. The red light stimulates the growth of yeast (Saccharomycodes ludwigii) and E coli in exponential growth phase. The action spectrum of monochromatic light on the growth of these organisms in the red region is very similar to that for HeLa cells.