Sedimenting particles and swimming microorganisms in a rotating fluid
| Autor: | D. A. Wiseley, R. P. Strittmatter, John O. Kessler, Nicholas A. Hill |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Atmospheric Science
Gravity (chemistry) Rotation Biophysics Gravitaxis Aerospace Engineering Biophysical Phenomena Quantitative Biology::Cell Behavior symbols.namesake Orientation Gravity Sensing Particle Size Swimming Physics Eukaryota Reynolds number Astronomy and Astrophysics Radius Mechanics Vorticity Microspheres Geophysics Classical mechanics Space and Planetary Science symbols General Earth and Planetary Sciences SPHERES Locomotion Mathematics Clinostat Gravitation |
| Zdroj: | Advances in Space Research. 21:1269-1275 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/s0273-1177(97)00398-0 |
| Popis: | Experiments and calculations on the trajectories of micron-sized spheres, suspended in a fluid that fills a closed container which rotates about an axis perpendicular to g, relate to the planning and interpretation of clinostat experiments. For low Reynolds number motion, the orbits are nearly circular, the radius being inversely proportional to the rotation rate. The swimming direction of micro-organisms can be affected by light, gravity, vorticity etc. The trajectories of algae swimming in steadily rotating environments have been observed and compared with theoretical predictions for ideal gyrotactic micro-organisms, thus providing some insights into the mechanisms of gravitaxis, gyrotaxis and the behaviour of the cells. |
| Databáze: | OpenAIRE |
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