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Inotropic effects of yttrium acetate (Y3+) on contractions of myocardium preparations of the frog Rana ridibunda, as well as on respiration and the inner membrane potential (ΔΨmito) of isolated rat heart mitochondria were studied. 2 mM yttrium in Ringer solution was found to significantly reduce the amplitude of myocardium contractions, evoked by electric stimulation, and increase the half-relaxation...
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