version August 9, 1995 
  Pat Wheeler 
  nitrogen-15 uptake rates for labeled substrates of nitrate and saturated 
  ammonium  
  Thomas Thompson cruise TT012 
  Wheeler last update: 7-28-95 
  Wheeler comments: 
  1) These incubations were all run in parallel with Dick Barber's in situ 
     14C measurements. 
  2) The new production (nitrate uptake) estimates are based on the mean of 
     duplicate incubations for each depth. 
  3) Saturated ammonium uptake was measured at concentrations of about 5 uM 
     and are single incubations for each depth.  These rates are "potential" 
     uptake rates and need to be interpreted carefully.