Prepping a sample (IMAGE)
Caption
A research team at the University of Washington and the Pacific Northwest National Laboratory examined the atomic composition of enamel samples from two human teeth. The researchers found that samples from an older person contained higher levels of the ion fluoride. Shown here, Jack Grimm, UW doctoral student in materials science and engineering and a doctoral intern at PNNL, prepares an enamel sample for atom probe tomography by loading it into a plasma-focused, ion-beam scanning electron microscope.
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Andrea Starr/Pacific Northwest National Laboratory
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