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Relaxations induced by electrical field stimulation (EFS) at 1 Hz in control conditions and in the presence of (A) superoxide dismutase (SOD, 1000 u ml−1), (B) D-mannitol (0.5 mM) and (C) ascorbic acid (30 μM). Results are expressed as percentage decrease of the prostaglandin F2α -induced contraction and shown as mean±s.e.mean for n=4 – 6 experiments. Student's t-test for paired values did not reveal any significant differences.
