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Sensor that sniffs like a dog - Scientists in Korea have developed a biosensor for assessing food quality that mimics the way receptors in a canine nose respond to smells. Tai Hyun Park and Seunghun Hong and colleagues from Seoul National University made a device that detects hexanal - a volatile compound produced when food is past its best. Reference: J Park et al, Analyst, 2012, DOI: 10.1039/c2an16274a