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Submission + - Pictures Reveal Weight of Cells (sciencemag.org)

sciencehabit writes: Scientists have measured a cell's mass using nothing more than a standard laboratory microscope and a digital camera. The picture is fed into an image-processing algorithms, which can deduce the cells' composition. Knowing an object's makeup allows one to infer its density, and because the microscope can also be used to measure an object's dimensions and volume, that data altogether enables researchers to calculate the weight of the cell.
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Pictures Reveal Weight of Cells

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