抄録
A measurement system has been fabricated to investigate the bio-magnetic field of mushrooms using a SQUID (Superconducting QUantum Interference Device), which is characterized as having the highest known sensitivity to magnetism (in the order of fT). A novel non-contact and non-invasive measurement technique was established to trace the spontaneous magnetic field produced by a Grifora frondosa fruit body. Measurements were made of the minute photoexcited bio-magnetic field, induced by the switched photo stimulation. A magnetic field that varied with photo-stimulation was confirmed in five cases out of 60 experiments. These results verify the effectiveness of the use of SQUIDs in the measurement of the bio-magnetic field of mushrooms.
