Felix Rodrigues Neto

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1. The hyperpolarization induced by catecholamines on barium-depolarized (0.2-0.8 mM BaCl) canine cardiac Purkinje fibres, in vitro, was studied by use of conventional microelectrode recordings of transmembrane electrical potentials. 2. Noradrenaline, adrenaline and isoprenaline hyperpolarized Purkinje fibres in a concentration-dependent manner from a(More)
Benzoic acid, salicylic acid and 5-bromosalicylic acid have been studied for their mechanism of action on crayfish and squid giant axons. External application of 0.1 to 0.5 mM 5-bromosalicylic acid prolonged the falling phase of the action potential, and at concentrations higher than 1.5 mM, nervous conduction was blocked. Boltage clamp analyses showed that(More)
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