| Value |
0.05
µm/sec
Range: equivalent to ~50 hours to fall 1 cm µm/sec
|
| Organism |
Bacteria Escherichia coli |
| Reference |
Calculation analogous to the one given in "Random walks in biology" Howard Berg Princeton University Press, 1993, pp.62 |
| Method |
uses the equation v=mg/6*pi*eta*R, where v is the terminal velocity, eta is the viscosity, m is the effective mass after subtracting the effect of bouyancy by subtracting the volume * density of water. |
| Comments |
Assumes the cell is a sphere of radius 0.5 µm and density 1.1 (BNID 103875). Viscosity of water 0.001 Pascal*Sec. E.coli is actually rod shaped. Please comment if you know of experimental values in the literature |
| Entered by |
Ron Milo - Admin |
| ID |
103870 |