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Effect of the aqueous Spirulina extract incubation on the concentration–response curve to the KATP channel opener cromakalim (CK) in aortic segments from aged SD rats. Results (means ± SEM) are represented as percentage of inhibition of the contraction elicited by 0.1 µM noradrenaline. Number of animals is indicated in parenthesis. The statistical significances are indicated in the graph.
