Some seeds will not be killed during the natural heating process in composting.

VOA: special.2009.06.23

Chemists call it "thermal runaway, " an ever-increasing heating process that can cause the battery to ignite.

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This made the heating process more efficient, so water, for instance, boiled more quickly thus saving energy.

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Dr Cooper and Julien Reboud, also from the University of Glasgow, have now developed a way to carry out the entire PCR process mixing, heating and cooling, as well as analysis using a single piezoelectric source, without the need for separate heating elements or detection equipment.

ECONOMIST: Acoustic microfluidics