Heatmap from Scientific Research

Representative velocity and vorticity fields observed in monolayers of prokaryotic WT P. aeruginosa cells. The colour map shows the local vorticity and the zero-vorticity contours are marked with black lines. The vorticity is normalized by its maximum value. The insets show a subset of cells within a single field of view, which have been overlaid with green arrows showing the local velocity. Here we have quantified movement using single-cell tracking (PIV), but we have also verified our results using PTV ( Methods and Table 2 ).

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