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Unknown dependent variables and their fundamental units in the biofilm growth model on agar substrate.
| Variables | Physical quantity | Units |
|---|---|---|
| L(t) | Biofilm thickness | L |
| S a(t) | Nutrient concentration in the agar substrate | ML −3 |
| S(t) | Average nutrient concentration in the biofilm | ML −3 |
| f(t) | Average volume fraction of active biomass in the biofilm | None |
| Average volume fraction of inactive biomass in the biofilm | None |
