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. Author manuscript; available in PMC: 2014 May 23.
Published in final edited form as: Anal Chem. 2009 Aug 15;81(16):7087–7090. doi: 10.1021/ac900968r

Figure 3.

Figure 3

The buoyant mass of E. coli cells with respect to recovery time from a hyperosmotic shock. Each data point represents a single cell or cluster transiting the cantilever. Following an osmotic shock initiated by the addition of Histodenz solution, all cells have a positive buoyant mass. As the experiment progresses, cells recover some of their lost water, decreasing in density until they have a negative buoyant mass (a). In the presence of 0.1% sodium azide (b), cells maintain a positive buoyant mass throughout the experiment.