event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
453    37    2      07072010  8.94728    -90.54543   2      7-1     1.491228    nd          
453    37    2      07072010  8.94728    -90.54543   12     7-2     5.894853    0.056394    
453    37    2      07072010  8.94728    -90.54543   20     7-3     16.885689   0.036407    
453    37    2      07072010  8.94728    -90.54543   30     7-4     25.720111   0.045732    
453    37    2      07072010  8.94728    -90.54543   40     7-5     28.795854   0.038009    
453    37    2      07072010  8.94728    -90.54543   50     7-6     25.460964   0.027649    
453    37    2      07072010  8.94728    -90.54543   60     7-7     31.466655   nd          
453    37    2      07072010  8.94728    -90.54543   80     7-8     31.924390   0.034599