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Fingerprint Technology May Have Medical Uses

CSI cast members take note, a new technology called DESI (desorption electrospray ionisation) can tell much more from fingerprints than someone's identity. The system, pioneered by chemists at Purdue University in Indiana, "involves spraying a tiny ... (0.15x0.15mm) area of a fingerprint with an electrically charged mixture of methanol and water. When these charged droplets come into contact with the surface of the print they collect any substances deposited on it, creating a thin liquid film. As more drops are sprayed on the same spot, some of this film is scattered and sucked into a mass ... (view more)

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