Abstract
We measured the spectrum and time transition of biophotons emitted from a suspension of prepared sample liquid of cucumber (Cucumis sativus 'white spine type') for an 18-hour period. We prepared the suspension of sample liquid by removing the skin of the cucumber fruit, processing the peeled fruit and then passing the obtained liquid through a paper filter. A set of glass low-pass filters was used for biophoton measurements. The biophoton spectrum was measured within the wavelength region of 280-650nm (ultraviolet to visual light). The biophoton spectrum was calculated using the differences of relative intensities to control samples. We found that it was broad and the strongest intensity peak was located at 520-540nm. Also ultraviolet emission (280-370nm) was detected although it was weak. Intensities of peaks at 480-540nm reached their maximum 4-5 hours after the start of measurements. The ultraviolet peak was detected for 10 hours after the start of measurements, but it could not be detected after that.
