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Fig. 8. Comparison of gas exchange patterns during pre-beam, beam on and post-beam
treatments. Only CO2 pulse volume (C) showed significant
differences (asterisk); beam on volumes were greater than those of both pre-
and post-beam. The top, bottom and line through the middle of the box
correspond to the 75th, 25th and 50th percentile (median), respectively;
whiskers extend from the 10th and 90th percentiles.