Cell Biophysics

, Volume 6, Issue 1, pp 33–52

Biophoton emission

New evidence for coherence and DNA as source


  • F. A. Popp
    • Laboratory of Biophysics
  • W. Nagl
    • Department of BiologyThe University
  • K. H. Li
    • Institute of PhysicsChinese Academy of Sciences
  • W. Scholz
    • Laboratory of Biophysics
    • Department of BiologyThe University
  • O. Weingärtner
    • Laboratory of Biophysics
    • Department of BiologyThe University
  • R. Wolf
    • Department of BiologyThe University

DOI: 10.1007/BF02788579

Cite this article as:
Popp, F.A., Nagl, W., Li, K.H. et al. Cell Biophysics (1984) 6: 33. doi:10.1007/BF02788579


The phenomenon of ultraweak photon emission from living systems was further investigated in order to elucidate the physical properties of this radiation and its possible source. We obtained evidence that the light has a high degree of coherence because of (1) its photon count statistics, (2) its spectral distribution, (3) its decay behavior after exposure to light illumination, and (4) its transparency through optically thick materials. Moroever, DNA is apparently at least an important source, since conformational changes induced with ethidium bromide in vivo are clearly reflected by changes of the photon emission of cells. The physical properties of the radiation are described, taking DNA as an exciplex laser system, where a stable state can be reached far from thermal equilibrium at threshold.

Index Entries

biological photon emissioncoherent photon emission, from DNADNA-exciplex laser modelemission, of photons from DNAphotons, emission from DNAlaser, DNA photons as possible

Copyright information

© The Humana Press Inc. 1984