Table 4.

The ambient ammonia concentration and 15N-ammonia in the tail compartment when the tail of P. schlosseri was exposed for 6 h to 5, 10 or 20 mmol l-1 15NH4Cl in the head compartment

Tail compartment
Condition Head compartment [Ambient ammonia] (mmol l-1)15N-ammonia (% atom excess)
pH[NH4Cl] (mmol l-1)0 h6 h0 h6 h
7.050.040.16073
100.040.18083
200.040.64069
8.05ND0.06054
10ND0.09018
20ND1.17045
  • ND, not detectable.