Researchers have discovered that concentrating a 'cold plasma' beam on soft fruit kills off the spores which cause mould. It can keep it away for up to a week.

This photomicrograph was obtained by scanning a beam of electrons across the sample while a detector kept track of electrons bouncing off its surface, betraying the specimen's outer shape.

It is accurate to within 0.03mm. The same sensor is used on a boat to shine a beam off the tiller bar, using the reflection to measure the Angle of the rudder.