Publications by authors named "P Napoleone"

Background: This statistical study was performed to find out the occurrence of accidents on board ships assisted by Centro Internazionale Radio Medico (CIRM) during the years 2010-2015, with the aim of providing suggestions in accident prevention, based on such a wide experience.

Materials And Methods: The case histories of CIRM in the years 2010-2015 were examined. The total number of accidents per year was calculated and compared as a percentage with the total number of cases assisted by CIRM per year.

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1. The subtype and anatomical localization of beta-adrenoceptors mediating facilitation of stimulus-induced overflow of noradrenaline ('prejunctional beta-adrenoceptors') are not conclusively known to date. The present study was undertaken to characterize these receptors by use of pharmacological methods as well as to define their localization (prejunctional or postjunctional) with radio-ligand binding and autoradiography techniques combined with surgical denervation of the sympathetic innervation to the rat kidney.

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Dopexamine hydrochloride is a synthetic dopamine analogue recently developed to improve myocardial and renal performance in patients suffering from low cardiac output states. The present study was designed to assess the pharmacological profile and the anatomical localization of [3H]-dopexamine binding sites within the human nephron. The effects of dopexamine on the 3'-5'-cyclic adenosine monophosphate (cAMP)-generating system in membrane particles of the human kidney were also investigated.

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Dopexamine hydrochloride is a synthetic catecholamine proposed for the short-term treatment of heart failure and postoperative low cardiac output. The pharmacological profile and anatomical localization of dopexamine binding were investigated in sections of right and left ventricle using [3H]-dopexamine and ligand techniques associated with light microscope autoradiography. Its effects on the 3-5-cyclic adenosine monophosphate (cAMP) generating system in membrane particles of the human right or left ventricle were also studied.

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Aging-dependent changes of some enzymatic activities related to the glycolytic anaerobic pathway (lactate-dehydrogenase, LDH), to the Krebs's cycle (succinate dehydrogenase, SDH) and to the activity of the respiratory oxidative chain (NADH2 - tetrazolium reductase, NADH-D) were studied in the nephron of 4-(young) and 24- (aged) month-old female Wistar rats. In the renal glomeruli LDH and NADH-D activities were reduced with aging, while SDH did not undergo aging-dependent changes. In both the proximal and the distal convoluted tubules, LDH reactivity slightly increased while NADH-D remarkably decreased in old rats; SDH did not show aging-dependent changes.

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