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- W4297394259 abstract "Helical-shaped magnetotactic bacteria provide a rare opportunity to precisely measure both the translational and rotational friction coefficients of micron-sized chiral particles. The possibility to align these cells with a uniform magnetic field allows to clearly separate diffusion along and perpendicular to their longitudinal axis. Meanwhile, their corkscrew shape allows detecting rotations around their longitudinal axis, after which orientation correlation analysis can be used to retrieve rotational diffusion coefficients in the two principal directions. Using light microscopy, we measured the four principal friction coefficients of deflagellated Magnetospirillum magneticum AMB-1 cells, and compared our results to that expected for cylinders of comparable size. We show that for rotational motions, the overall dimensions of the cell body are what matters most, while the exact body shape influences translational motions. To obtain a full characterization of the friction matrix of these elongated chiral particles, we also quantified the coupling between the rotation around and translation along the longitudinal axis of the cell. Our results suggest that for this bacterial species cell body rotation could significantly contribute to cellular propulsion." @default.
- W4297394259 created "2022-09-28" @default.
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- W4297394259 date "2021-04-30" @default.
- W4297394259 modified "2023-09-29" @default.
- W4297394259 title "Experimental determination of the propulsion matrix of the body of helical Magnetospirillum magneticum cells" @default.
- W4297394259 doi "https://doi.org/10.48550/arxiv.2105.00103" @default.
- W4297394259 hasPublicationYear "2021" @default.
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