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Table 5.

The ambient ammonia concentration and 15N-ammonia in the head compartment when the tail of P. schlosseri was exposed for 6 h to 5, 10 or 20 mmol l-115NH4Cl in the tail compartment

Head compartment
Condition
Tail compartment
[Ambient ammonia] (mmol l-1)
15N-ammonia (% atom excess)
pH[NH4Cl] (mmol l-1)0 h6 h0 h6 h
7.0 0.01 0.53 
 10 0.02 1.99 
 20 0.02 2.34 54 
8.0 ND 0.56 26 
 10 ND 2.00 60 
 20 ND 2.32 75 
Head compartment
Condition
Tail compartment
[Ambient ammonia] (mmol l-1)
15N-ammonia (% atom excess)
pH[NH4Cl] (mmol l-1)0 h6 h0 h6 h
7.0 0.01 0.53 
 10 0.02 1.99 
 20 0.02 2.34 54 
8.0 ND 0.56 26 
 10 ND 2.00 60 
 20 ND 2.32 75 

ND, not detectable.

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