Listar Departament: Física por autoría "a4f5979b-34fa-4261-9b48-0a67dc0a5862"
Mostrando ítems 1-20 de 24
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A refined model on flow and oxygen consumption in the human cornea depending on the oxygen tension at the interface cornea/post lens tear film during contact lens wear
Compañ, Vicente; Aguilella-Arzo, Marcel; del Castillo, Roxana; Espinós Gutiérrez, Francisco J.; del Castillo, Luis Felipe Elsevier (2021-02-13)The study of oxygen consumption rate under” in vivo” human cornea during contact lens wear has been technically a challenge and several attempts have been made in the last 20 years to model the physiology of the human ... -
A three-dimensional model to describe complete human corneal oxygenation during contact lens wear
Aguilella-Arzo, Marcel; Compañ, Vicente Wiley (2022-10-10)We perform a novel 3D study to quantify the corneal oxygen consumption and diffusion in each part of the cornea with different contact lens materials. The oxygen profile is calculated as a function of oxygen tension at the ... -
Access resistance in protein nanopores. A structure-based computational approach
Aguilella-Arzo, Marcel; Aguilella, Vicente Elsevier (2020-02)Single-channel conductance measurements in biological pores have demonstrated the importance of interfacial effects in nanopores, particularly in protein channels with low aspect ratio (length over aperture radius). Access ... -
Analysis of the application of the generalized monod kinetics model to describe the human corneal oxygen-consumption rate during soft contact lens wear
Compañ, Vicente; Aguilella-Arzo, Marcel; Del Castillo, Luis F.; Hernández, Saúl Iván; González Méijome, J.M. Wiley (2017-10)This work is an analysis of the application of the generalized Monod kinetics model describing human corneal oxygen consumption during soft contact lens wear to models previously used by Chhabra et al. (J Biomed Mater Res ... -
Big dynorphin is a neuroprotector scaffold against amyloid β-peptide aggregation and cell toxicity
Gallego Villarejo, Lucia; Wallin, Cecilia; Król, Sylwia; Enrich Bengoa, Jennifer; Suades, Albert; Aguilella-Arzo, Marcel; Gómara Elena, María José; Haro, Isabel; Wärmlander, Sebastian; Muñoz, Francisco J.; Gräslund, Astrid; Perálvarez-Marín, Alex Elsevier (2022)Amyloid β-peptide (Aβ) misfolding into β-sheet structures triggers neurotoxicity inducing Alzheimer’s disease (AD). Molecules able to reduce or to impair Aβ aggregation are highly relevant as possible AD treatments since ... -
Charged Biological Membranes Repel Large Neutral Molecules by Surface Dielectrophoresis and Counterion Pressure
Aguilella-Arzo, Marcel; Hoogerheide, David; Doucet, Mathieu; Wang, Hanyu; Aguilella, Vicente American Chemical Society (2024-01-16)Macromolecular crowding is the usual condition of cells. The implications of the crowded cellular environment for protein stability and folding, protein-protein interactions, and intracellular transport drive a growing ... -
Charged Biological Membranes Repel Large Neutral Molecules by Surface Dielectrophoresis and Counterion Pressure
Aguilella-Arzo, Marcel; Hoogerheide, David; Doucet, Mathieu; Wang, Hanyu; Aguilella, Vicente American Chemical Society (2024-01-31)Macromolecular crowding is the usual condition of cells. The implications of the crowded cellular environment for protein stability and folding, protein–protein interactions, and intracellular transport drive a growing ... -
Comments to paper entitled: Predicting scleral GP lens entrapped tear layer oxygen tensions (Letter)
Compañ, Vicente; Aguilella-Arzo, Marcel; Montero, Alvaro E.; Mollá, Sergio; Oliveira, C.; Peixoto de Matos, S.C.; González Méijome, J.M. Elsevier (2015-10) -
Corneal relaxation time estimation as a function of tear oxygen tension in human cornea during contact lens wear
Del Castillo, Luis Felipe; Ramirez-Calderon, Juanibeth; del Castillo, Roxana; Aguilella-Arzo, Marcel; Compañ, Vicente John Wiley & Sons (2019-12-03)The purpose is to estimate the oxygen diffusion coefficient and the relaxation time of the cornea with respect to the oxygen tension at the cornea–tears interface. Both findings are discussed. From the experimental data ... -
Dielectric saturation of water in a membrane protein channel
Aguilella-Arzo, Marcel; Andrio, Andreu; Aguilella, Vicente; Alcaraz, Antonio Royal Society of Chemistry (2009)Water molecules in confined geometries like nanopores and biological ion channels exhibit structural and dynamical properties very different from those found in free solution. Protein channels that open aqueous pores ... -
Diffusion and Monod kinetics model to determine in vivo human corneal oxygen-consumption rate during soft contact lens wear
Del Castillo, Luis F.; Ferreira da Silva, Ana R.; Hernández, Saúl Iván; Aguilella-Arzo, Marcel; Andrio, Andreu; Mollá, Sergio; Compañ, Vicente Elsevier (2015-01)Purpose: We present an analysis of the corneal oxygen consumption Qc from non-linear models, using data of oxygen partial pressure or tension (pO2pO2) obtained from in vivo estimation previously reported by other authors. ... -
Dynorphin A induces membrane permeabilization by formation of proteolipidic pores. Insights from electrophysiology and computational simulations
Perini, Deborah Aurora; Aguilella-Arzo, Marcel; Alcaraz, Antonio; Perálvarez-Marín, Alex; Queralt-Martín, María Elsevier (2021-12-16)Dynorphins are endogenous neuropeptides that function as ligands for the κ-opioid receptor. In addition to opioid activity, dynorphins can induce several pathological effects such as neurological dysfunctions and cell ... -
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 ... -
First-passage-time analysis of atomic-resolution simulations of the ionic transport in a bacterial porin
Calero, Carles; Faraudo, Jordi; Aguilella-Arzo, Marcel American Physical Society (2011-02-16)We have studied the dynamics of chloride and potassium ions in the interior of the Outer membrane porin F (OmpF) under the influence of an external electric field. From the results of extensive all-atom molecular dynamics ... -
Fluctuation-Driven Transport in Biological Nanopores. A 3D Poisson–Nernst–Planck Study
Aguilella-Arzo, Marcel; Queralt-Martín, María; López, María Lidón; Alcaraz, Antonio MDPI (2017)Living systems display a variety of situations in which non-equilibrium fluctuations couple to certain protein functions yielding astonishing results. Here we study the bacterial channel OmpF under conditions similar to ... -
Insights on the permeability of wide protein channels: measurement and interpretation of ion selectivity
Aguilella, Vicente; Queralt-Martín, María; Aguilella-Arzo, Marcel; Alcaraz, Antonio Royal Society of Chemistry (2012-10-11)Ion channels are hollow proteins that have evolved to exhibit discrimination between charged solutes. This property, known as ion selectivity is critical for several biological functions. By using the bacterial porin OmpF ... -
Ion selectivity of a biological channel at high concentration ratio: insights on small ion diffusion and binding
López Peris, María Lidón; Aguilella-Arzo, Marcel; Aguilella, Vicente; Alcaraz, Antonio American Chemical Society (2009)The ionic selectivity of the bacterial porin OmpF has been investigated in several chloride salts of alkali metal cations under a wide range of concentration ratios. We report a novel way of studying the several factors ... -
Ion transport through biological channels
Faraudo, Jordi; Aguilella-Arzo, Marcel Institut d’Estudis Catalans (2015)The transport of ions across single-molecule protein nanochannels is important both in the biological context and in proposed nanotechnological applications. Here we discuss these systems from the perspective of ... -
Mecànica de fluids i termodinàmica
Cervera, Javier; Aguilella-Arzo, Marcel; Gómez Hernández, Santiago E. Universitat Jaume I (2010) -
Molecular dynamics simulations of concentrated aqueous electrolyte solutions
Calero, Carles; Faraudo, Jordi; Aguilella-Arzo, Marcel Taylor & Francis (2011)Transport properties of concentrated electrolytes have been analysed using classical molecular dynamics simulations with the algorithms and parameters typical of simulations describing complex electrokinetic phenomena. ...