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Exposure of cardiomyocytes from chicken embryos for 3 days to the β-adrenoceptor agonist, isoproterenol, lead to a down-regulation of β-adrenoceptors by about 70% and to a decrease in isoproterenol-stimulated adenylyl cyclase activity by about 40% (homologous desensitization). In addition, the isoproterenol treatment induced an increase in the level of(More)
In isolated coronary-ligated rabbit hearts, quantification of epicardial flow distribution pattern and of ischemic area was performed from flow indicator and endogenous NADH-fluorescence pictures, respectively, after UV-flash photography. After being digitized (256 X 256 pixels), the fluorescence photos were analyzed by an Apple desk computer using(More)
In order to clarify the question whether the beta 1-selective adrenoceptor antagonist celiprolol possesses vasodilating properties, isolated vascular networks were perfused with increasing concentrations of celiprolol (in a cumulative manner) ranging from 10(-8) to 10(-4) mol/l. The study was carried out using the isolated mesenteric vascular bed of the(More)
In order to clarify the question whether the β1-selective adrenoceptor antagonist celiprolol possesses vasodilating properties, isolated vascular networks were perfused with increasing concentrations of celiprolol (in a cumulative manner) ranging from 10−8 to 10−4 mol/l. The study was carried out using the isolated mesenteric vascular bed of the guinea pig(More)
Exposure of cardiomyocytes from chicken embryos for 3 days to the beta-adrenoceptor agonist, isoproterenol, lead to a down-regulation of beta-adrenoceptors by about 70% and to a decrease in isoproterenol-stimulated adenylyl cyclase activity by about 40% (homologous desensitization). In addition, the isoproterenol treatment induced an increase in the level(More)
This paper focuses on the analysis and design of a dielectric lens antenna and its application for ground penetrating radar (GPR) at millimeter waves. The work investigates the influence of different design parameters on the resolution performance of GPR using a dielectric lens for focusing. The performance of the optical focusing of the dielectric lens is(More)
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