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Make like a dentist with this in-home tooth scanner

Soon, a scanner using light spectroscopy might be able to tell if you have cavities or if you're giving all your teeth equal attention when you brush.

By December 8, 2014


Chemical sniffing device uses water, handheld computer.

Purdue University has helped develop a handheld sniffing system that can detect bacteria, drugs or any other residue of interest. Applications range from food safety to homeland security. In this video provided by Purdue, analytical chemist Graham Cooks explains DESI (Desorption Electrospray Ionization).

November 1, 2007