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Showing 1 to 7 of 7 for “"Permanent Charge"”.
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A Dynamical Study of the Poisson-Nernst-Planck System for Three Ions
… of ions with three regions of piecewise constant permanent charge. Reservoirs are represented by the outer regions with permanent charge zero. The PNP system can be treated as singularly perturbed system that has two limiting systems: inner and outer systems (termed fast and slow system in …
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New Derivatization Strategies for Installation of Fixed, Permanent Charges onto Analytes of Biological and Environmental Concern
… a Meldrum's acid derivative containing a fixed permanent charge (MAD+) to be used as a stable ketene precursor. Synthesis of a MAD+ was explored via alkylation and Knoevenagel condensation reactions but proved unfruitful. However, C-alkylation with 6-bromohexanoic acid via carbodiimide coupling, …
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Chemisorption of ammoniacal nitrogen by clays
… corresponded closely to values obtained for the permanent charge (CEC) and the total charge (total CEC) developed at a specific pH higher than 6 respectively. It was shown that if sufficient ammonia is applied, exchangeable Al⁺⁺⁺ of Al-compounds may be precipitated as Al(OH)₃. An attempt to …
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Development Of Isotags For Nmr Based Metabolite Profiling And Applications
… an NMR sensitive</p> <p>isotope, and a permanent charge for MS sensitivity. Finally, we present a study on metabolite profiling using intact breast cancer tissue samples in which we exploit the combined strength of NMR and multivariate statistical methods for metabolite profiling.</p>
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Steady-State Poisson-Nernst-Planck Systems: Asymptotic expansions and applications to ion channels
… model with two species of ions and a zero permanent charge in the channel.
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Study of Biological Ion Channels by Using PNP/ECP Model
… carry a highly localized distribution of permanent charge and possess specific properties (e.g., selectivity and switching) that are interesting to the device engineering community. The Poisson-Nernst-Planck (PNP) theory, also known as drift-diffusion theory, can be used to compute …
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Nanoscale transport simulation of ion channels
… acids carrying a strong and sharply varying permanent charge, folded in such a way that it creates a nanoscopic aqueous pore spanning the otherwise mostly impermeable membranes of biological cells. These naturally occurring proteins are particularly interesting to device engineers seeking to …