Another possibility was that the aurora was due to resonant scattering of nitrogen molecular ions caused by sunlight irradiation.

This study is the first to show that such plasma irradiation can accelerate tendon repair.

"But, in the near term, we have shown that irradiation can be used as a high-precision measurement technique."

Zeolites can become amorphous when subjected to electron beam irradiation, but that damage is related to the composition of the zeolite, and the team found that some pollucite inclusions were stable in the electron beam.

Aiming to shorten recovery times, an Osaka Metropolitan University-led research group is focusing on plasma irradiation as a treatment method to speed up bone healing.