Amazing stuff! Do living beings have an aura, an ancient question?
"... According to a recent study by researchers from University of Calgary, every living system emits light without requiring external excitation due to a biological phenomenon known as ultraweak photon emission (UPE). ...
Unlike bioluminescence, which produces high-intensity light visible to the naked eye, UPE, also known as biophoton emission, is a spontaneous release of extremely low-intensity light that is invisible to the human eye and falls within the spectral range of 200–1,000 nm. This faint light has been detected in a wide range of life forms—from single-celled organisms and bacteria to plants, animals, and even humans. ..."
P.S. The University of Calgary website sucks! Most of the authors of this paper are affiliated with this website, but try finding a news release about their research. So does the National Research Council Canada website.
From the abstract:
"The phenomenon of biological ultraweak photon emission (UPE), that is, extremely low-intensity emission (10 − 103 photons/cm2/sec) in the spectral range of 200 − 1000 nm, has been observed in all living systems that have been examined. Here we report experiments that exemplify the ability of novel imaging systems to detect variations in UPE for a set of physiologically important scenarios.
We use EMCCD and CCD cameras to capture single visible-wavelength photons with low noise and quantum efficiencies higher than 90%. Our investigation reveals significant contrast between the UPE from live vs. dead mice.
In plants we observed that an increase in temperature and injuries both caused an increase in UPE intensity. Moreover, chemical treatments modified the UPE emission characteristics of plants, particularly the application of an anesthetic (benzocaine) to injury, which showed the highest emission among the compounds tested.
As a result, UPE imaging provides the possibility of non-invasive label-free imaging of vitality in animals and the responses of plants to stress."
Imaging Ultraweak Photon Emission from Living and Dead Mice and from Plants under Stress (preprint, open access)
Imaging Ultraweak Photon Emission from Living and Dead Mice and from Plants under Stress (no public access)
FIG. 3. Reduced biophoton emission in euthanized mice compared to live mice. (A) UPE images from live mice (top row, N=4) and recently euthanized mice (bottom row, N=4) following 30 minutes of dark acclimation and a 60-minute biophoton imaging session.
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