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Figure 6


Fig. 6. The effects of in situ electrical stimulation on (A) total catecholamine secretion (sum of noradrenaline plus adrenaline) and (B) perfusate NOX levels in preparations derived from fish repeatedly exposed to hypoxia (unfilled bars; N=9) or from control fish (filled bars; N=9). Following the stabilization period, the preparations were perfused with control saline or saline containing a cocktail of NOS inhibitors (cross-hatched bars) and electrically stimulated at 30 V and 8 Hz. Values are shown as means ± 1 s.e.m. A dagger denotes a significant difference (P<0.5) between pre-experimental (Pre) and stimulated samples. An asterisk denotes a significant difference (P<0.5) between the hypoxia-treated preparations with or without NOS inhibitors.





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