The plasma physics of grapes in the microwave

The arc between two grapes when heated in a microwave oven.

Ever wondered why sparks fly when you microwave two closely spaced grapes? While this simple way of generating a spectacular plasma has intrigued the general public, there has also been a long-running debate about exactly what physics is involved in the process. Dr Kwo Ray Chu and his team at National Taiwan University have recently unraveled the physics behind it. […]

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Microwave soil heating can reduce arsenic absorption of rice plants

Dr Graham Brodie researches microwave heating of soil and the application of microwave-generated biochar as a means of reducing arsenic absorption in rice.

Rice is a staple food for much of the world’s population, but it is also highly prone to absorbing environmental arsenic compared to other cereal crops. Biochar from microwave-assisted pyrolysis – microwave heating under low oxygen conditions – has been shown to remove contaminants from soil. Microwave soil heating also increases crop growth. Dr Graham Brodie, Governor of the International […]

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