Halogen Balance of Blood, Spinal Fluid and Urine

Hydrogen gas-driven permeation through the membrane with asymmetric surface conditions

“…That is, the concentration profile is rather flat in SLR, and this is often suggested in SLR calculations, for example [13,14]. The suggestion about the flat profile led in fact to the expression for the permeation rate (10) in [13]. Later, we will see that the profile is not always flat in SLR.…”

“…Permeation rate does not depend on surface effects in DLR, and is symmetric with respect to two K values in SLR as (10) shows. Therefore, the direction of permeation is of no importance both in pure DLR and in pure SLR.…”

“…The lines W 1 = 1, W 2 = 1, and W 1 = W 2 are the boundaries between the limit regimes. Permeation at W 1 and W 2 close to the boundaries is neither exactly DLR nor exactly SLR and is not described by (9) and (10). Analyses of validity of analytical formulas for j(t) in the intermediate regions demonstrated that these regions can be rather wide [15].…”

“…Particularly, Baskes [6], Pick and Sonnenberg [7], and Richards [8] considered various channels of recombination in obtaining their expressions for the recombination coefficient that were analyzed by Pisarev and Ogorodnikova [9]. As permeation is a complex process, which depends on surface and bulk effects, Ali-Khan et al [5] and Notkin [10] analyzed the interplay between bulk diffusion and surface effects and demonstrated various regimes of permeation. Ali-Khan introduced the terms the diffusion limited regime (DLR) of permeation and the surface limited regime (SLR) of permeation.…”