\[J=P(C_1-C_2)\]
Variables
Jpermeability flux (mol/m²·s)
Pmembrane permeability coefficient (m/s)
C1concentration on side 1 (mol/m³)
C2concentration on side 2 (mol/m³)
Description
What is this formula?
This formula calculates the molecular flux through a membrane based on the membrane permeability and the concentration difference across the membrane.
When to use it
Use this formula in membrane transport studies, physiology, pharmacology, or cellular biophysics when evaluating passive transport through biological membranes.
Example
A membrane has:
P=1.5×10^-6 m/s
C1=120 mol/m³
C2=80 mol/m³
Formula:
J=P*(C1-C2)
Substitution:
J=(1.5×10^-6)*(120-80)
Result:
J=6.0×10^-5 mol/m²·s
The permeability flux is 6.0×10^-5 mol/m²·s.
Applications
- Cellular membrane transport
- Drug diffusion studies
- Respiratory physiology
- Pharmacokinetics
- Bioengineering