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Bacterial swimming efficiency measured in optical trap

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Lauren I. Rugani

Escherichia coli swim from site to site in search of food, using several helical flagella (typically a few microns in length and 20 nm in diameter) for propulsion. Although there is significant data on swimming bacteria, including average speeds and torques, other important parameters such as translational and rotational drag coefficients have been difficult to measure for intact cells. Because these parameters are necessary for quantitative understanding of bacterial propulsion, a team of researchers at the University of Pittsburgh and at Pennsylvania State University in Erie employed...Read full article

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