Fish freshness easily monitored with a new sensor

To see if a fish is fresh, people recommend looking at its eyes and gills or giving it a sniff. But a more accurate check for food quality and safety is to look for compounds that form when decomposition starts.

Sugar-coated sensor sniffs out look-alike molecules in the air

Scientists have designed a new type of gas sensor that can tell apart "mirror image" versions of the same smell molecule, even at very low concentrations. By coating carbon nanotubes with custom-built sugar-based receptors, ...

How phototherapy could reverse antibiotic resistance

Lars Stevens-Cullinane works in a dark room. But he's not processing negatives and printing photographs on light-sensitive paper; he's testing whether brief flashes of light can make drug-resistant bacteria sensitive to antibiotics.

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