dorsal/arxiv
View SchemaSwimming Efficiency of Bacterium Escherichia Coli
| Authors | Suddhashil Chattopadhyay, Radu Moldovan, Chuck Yeung, X. L. Wu |
|---|---|
| Categories | |
| ArXiv ID | physics/0512219 |
| URL | https://arxiv.org/abs/physics/0512219 |
| DOI | 10.1073/pnas.0602043103 |
Abstract
We use in vivo measurements of swimming bacteria in an optical trap to determine fundamental properties of bacterial propulsion. In particular, we determine the propulsion matrix, which relates the angular velocity of the flagellum to the torques and forces propelling the bacterium. From the propulsion matrix dynamical properties such as forces, torques, swimming speed and power can be obtained from measurements of the angular velocity of the motor. We find significant heterogeneities among different individuals even though all bacteria started from a single colony. The propulsive efficiency, defined as the ratio of the propulsive power output to the rotary power input provided by the motors, is found to be 0.2%.
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"abstract": "We use in vivo measurements of swimming bacteria in an optical trap to\ndetermine fundamental properties of bacterial propulsion. In particular, we\ndetermine the propulsion matrix, which relates the angular velocity of the\nflagellum to the torques and forces propelling the bacterium. From the\npropulsion matrix dynamical properties such as forces, torques, swimming speed\nand power can be obtained from measurements of the angular velocity of the\nmotor. We find significant heterogeneities among different individuals even\nthough all bacteria started from a single colony. The propulsive efficiency,\ndefined as the ratio of the propulsive power output to the rotary power input\nprovided by the motors, is found to be 0.2%.",
"arxiv_id": "physics/0512219",
"authors": [
"Suddhashil Chattopadhyay",
"Radu Moldovan",
"Chuck Yeung",
"X. L. Wu"
],
"categories": [
"physics.bio-ph"
],
"doi": "10.1073/pnas.0602043103",
"title": "Swimming Efficiency of Bacterium Escherichia Coli",
"url": "https://arxiv.org/abs/physics/0512219"
},
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