Word: chromatographs
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...tests involving 32 different strains of bacteria, Cornell University Biologist Martin Alexander and General Electric Chemist John Gould have found that each excretes metabolic wastes that are chemically distinct. When the waste products of a single strain are passed through a laboratory chromatograph. a device that separates chemical compounds, they produce a distinctive graph with characteristic peaks and valleys. Thus the graphs or chromatograms of unidentified bacteria can be com pared with those of known bacteria and-like fingerprints-be used to establish their exact identity...