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Effect of Pycnocycla spinosaextracts on tonic contractions developed in rat isolated ileum by KCl (80 mM). Time-matched control tissues treated with vehicle in equivalent volume. Results are given as mean and vertical bars indicate SEM (n=6). Stars shows statistically significant differences between the test and control groups at corresponding points. *P<0.05, **P<0.01, ***P<0.001 (Student's t-test).
