Transport kinetics charge

The plot of permeability coefficient versus molecular radius in Figure 10 shows the interdependence of molecular size and electric charge. The permeability of the solutes decreases with increasing size. The protonated amines permeate the pores faster than neutral solutes of comparable size, and the anions of weak acids permeate the pores at a slower rate. The transport behavior of the ionic permeants is consistent with a net negatively charged paracellular route. These results are phenomenologically identical to those found in the transport kinetics of... 

Dungan et al. [186] have measured the interfacial mass transfer coefficients for the transfer of proteins (a-chymotrypsin and cytochrome C) between a bulk aqueous phase and a reverse micellar phase using a stirred diffusion cell and showed that charge interactions play a dominant role in the interfacial forward transport kinetics. The flux of protein across the bulk interface separating an aqueous buffered solution and a reverse micellar phase was measured for the purpose. Kinetic parameters for the transfer of proteins to or from a reverse micellar solution were determined at a given salt concentration, pH, and stirring... 

R. J. Chesterfield, J. C. McKeen, C. R. Newman, P. C. Ewbank, D. Filho, J.-L. Bredas, L. L. Miller, K. Mann, and C. D. Frisbie, Organic thin film transistors based on N-alkyl perylene diimides Charge transport kinetics as a function of gate voltage and temperature , Journal of Physical Chemistry B 108, 19281 (2004). 

Figure 5. Schematic of the apparatus used to measure kinetic charge transport of toners. The magnetic poles are not shown but their presence is indicated by the undulations in the toner layer. All experiments were performed with a stationary magnet core and a pole in the nip.

Charge transport kinetics as a function of gate voltage and temperature, J. Phys. Chem. B 108 (50), 19281-19292, 2004. 

The equations governing mass and charge transport in dilute solutions are derived and it is established that for many practical problems these equations can be reduced to a potential model. This model describes transport of charge in the solution and deals with electrode kinetics and mass transport in the diffusion layer which are considered as boundary conditions. Particular boundary conditions involved by resistive electrodes or coatings are also mentioned. The concepts primary, secondary and tertiary distribution are discussed and the Wagner number, characterizing a current distribution, is defined. The local form of Faraday s law is derived and extended to deal with moving electrodes. 

When the overvoltage is sufficiently low, then it can be divided into the sum of two terms which are frequently called the activation overpotential, ria, on the one hand, related to charge transfer kinetics and on the other hand the concentration overpotential, 7d, related to mass transport kinetics ... 

Many kinetic phenomena can be described by basic concepts that broadly fall into one of two domains reaction processes and transport processes. Reaction kinetics describes the rates at which reactions occur while transport kinetics describes the rates at which matter (e.g., atoms or molecules), or charge, or energy is physically transported from one place to another. 

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