Listar Departament: Física por autoría "a6bab441-1d32-483a-834f-afe8c8a7fc0d"
Mostrando ítems 1-4 de 4
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Directional ion selectivity in a biological nanopore with bipolar structure
García Giménez, Elena; Alcaraz, Antonio; Aguilella, Vicente; Ramírez, Patricio Elsevier (2009)Ion transport features of a biological nanopore, the bacterial porin OmpF from Escherichia coli, have been investigated by patch-clamp experiments performed at the single channel level. Membrane potential measurements done ... -
Electrical pumping of potassium ions against an external concentration gradient in a biological ion channel
Aguilella, Vicente; Alcaraz, Antonio; Ramírez, Patricio; García Giménez, Elena; Mafe, Salvador; Queralt-Martín, María AIP Publishing (2013-07-22)We show experimentally and theoretically that significant currents can be obtained with a biological ion channel, the OmpF porin of Escherichia coli, using zero-average potentials as driving forces. The channel rectifying ... -
Electrokinetic phenomena in microporous membranes with a fixed transverse charge distribution
Aguilella, Vicente; Aguilella-Arzo, Marcel; Ramírez, Patricio Elsevier (1996-05)The charged capillary model for microporous membranes has been extended to account for a distribution of fixed charge transversal to the pore wall. The non-linearized Poisson-Boltzmann equation has been solved numerically ... -
Energy transduction and signal averaging of fluctuating electric fields by a single protein ion channel
Verdiá Báguena, Carmen; Gómez, V.; Cervera, Javier; Ramírez, Patricio; Mafe, Salvador Royal Society of Chemistry (2017)We demonstrate the electrical rectification and signal averaging of fluctuating signals using a biological nanostructure in aqueous solution: a single protein ion channel inserted in the lipid bilayer characteristic of ...