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Direct methanol fuel cells (DMFCs) constitute nowadays a promising alternative to lithium ion batteries for powering portable devices. The effective design of power-management units for interfacing DMFCs requires accurate models able to account for variable-load conditions and fuel consumption. A dynamic nonlinear circuit model for passive methanol fuel(More)
The electrical performance of Nafion was investigated from -155 to 155°C in the frequency range from 10 mHz to 10 MHz and for two different hydration conditions. The electrical responses are mainly due to conductivity, electrode polarization and relaxation phenomena. These features were correlated to the molecular and nano-scale structure of the material(More)
Agmatine, a divalent diamine with two positive charges at physiological pH, is transported into the matrix of liver mitochondria by an energy-dependent mechanism, the driving force of which is the electrical membrane potential. Its binding to mitochondrial membranes is studied by applying a thermodynamic treatment of ligand–receptor interactions on the(More)
Four platinum(II) complexes of general formula [PtCl(η1-C9H7)L2] [where L2 is 1,2-bis(diphenylphosphino)ethane (dppe) 1 or cycloocta-1,5-diene (cod) 3] and [PtCl2L2] (where L2 is dppe 2 or cod 4) were studied. Inhibition growth assays on human tumor cell lines evidenced for 1 and 3 an antiproliferative effect and, interestingly, the cytotoxic effect exerted(More)
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