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Steps
- Look up the
diffusion coefficient of the appropriate HSL in water at 25oC,
Table 4-1.
- Scale the value of
Daq
down to estimate
De.
For solutes the size of the HSL,
De
is approximately 25% of
Daq
(Figure X)
- Plug the numbers into
Equation 1, making sure that the distance units
cancel.
- Interpret the
result. For example, how does the time scale for
diffusive penetration compare to the time scale for
phenotypic changes (perhaps 10 min)?
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