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Three-dimensional control of Tetrahymena pyriformis using artificial magnetotaxis
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Normal T. pyriformis cell and (b) with ingested magnetite. The scale bar is 10 μm. (c) Coil configuration drawing in two different views. (d)-(e) Simulation result of the strength of the magnetic fields (d) when only one set of Helmholtz coils in x-axis and (e) only one coil in z-axis are activated, respectively.

Image of FIG. 2.
FIG. 2.

(Color online) The intensity difference of T. pyriformis from that of the background from 0 to 500 μm. From 0 to 20 μm, the intensity difference increases and the data are fitted with a linear curve. From 20 to 500 μm, it decreases exponentially and the data are fitted using Eq. (1).

Image of FIG. 3.
FIG. 3.

(Color online) The manual control experiment. (a)-(l) The sequence of images of (a) planar motion at around 127.0 μm from the focal plane, (b)-(f) upward vertical motion, (g) planar motion at around 446.6 μm from the focal plane, and (h)-(l) downward vertical motion. The scale bar is 100 μm. (m) The trajectory in a 3D view, (n) a view of xy-plane, and (o) xz-plane. The dashed and solid lines represent the trajectories in the lower plane and the upper plane, respectively. The dashed-dot and dotted lines represent the trajectories in the z-axis for upwards and downwards motion, respectively. (p) The intensity difference of the tracked cell. Light and dark yellow regions represent the period when positive and negative magnetic fields are applied along the z-axis, respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Three-dimensional control of Tetrahymena pyriformis using artificial magnetotaxis