1. Bacteria Give Stirring Performance

    Bacteria Give Stirring Performance
    Like flocking birds and swarming locusts, swimming bacteria will coordinate their motion when highly concentrated. A team has now developed a technique that can capture a three-dimensional snapshot of the density of these cooperating bacteria inside a thin film of fluid. The results, reported in the September Physical Review E, show the rising and falling of bacterial plumes, which may help to increase the bacteria's access to oxygen. The work could improve understanding of cooperative bacterial behavior and could also help researchers design better micro-mixers. Collective motion has been observed throughout biology from sperm cells to wildebeests. Swimming bacteria ...
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