Articles on Chemistry

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Police officers wearing riot gear push back demonstrators shooting tear gas next to St. John’s Episcopal Church outside of the White House, June 1, 2020 in Washington D.C., during a protest over the death of George Floyd. JOSE LUIS MAGANA/AFP via Getty Images

What is tear gas?

The chemical weapon, tear gas, was used in Washington DC, Los Angeles, Orlando and several other cities to control crowds protesting the death of George Floyd. But what is it? Does it cause harm?
Are people reconnecting with the traditional household activities of their mothers and grandmothers under quarantine? The preparation of sourdough begins with a mix of flour, water and natural yeast. (Shutterstock)

Before DIY sourdough starters became popular, there was home economics

Home economics isn't dead: We need it now more than ever. Founded by a pioneering chemist, it's about the insight that a change in one part of a system affects all the other parts.
Pulsed extraction column (normally positioned vertically). JCP Gabriel, CEA Marcoule DES/ISEC/DMRC

New technologies to recycle electronic waste

Electronic waste is accumulating and is a resource to be exploited. Microfluidic devices allow the development of recycling, including the recycling of rare earths – a precious resource.
If you’ve ever put wet wood on to a fire, you may have noticed it makes a lot more noise than dry wood. Shutterstock

Curious Kids: why does wood crackle in a fire?

Water and sap inside the wood make mini explosions as they turn into gas and burst out. That's why damp wood makes the noisiest fires.

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