An alternative TPB-related rate limiting step in parallel to oxygen diffusion through Pt would be oxygen diffusion through an impurity phase at the TPB (cf. Fig. 13d).
In the absence of metastable olivine, the rheology of the slab near the foci is controlled by the rheology of ringwoodite, for which the expected deformation style would be either diffusion creep or dislocation creep, depending primarily on the grain size (e.g., Shimojuku et al. [2009]).
Upon cellulase treatment, the transmembrane potential of Medicago sativa root hairs was depolarised to ca -50 mV [ 54], i.e., to what probably would be the diffusion potential [ 55].
The simplest model for the rapid appearance of precipitates would be a diffusion-limited colloidal instability of the oligomers.
In this case, increases in baryon density do not require a corresponding increases in photon density, and the lower the photon density, the less diffusion there would be: the less diffusion, the less damping.
Without such a mechanism, chemokine gradients would be disrupted by diffusion, especially in the presence of shear forces in the blood vessels and draining lymph nodes.
The diffusion coefficient is given as D = Γa2/z (eq. 3), where z = 2 for 1D diffusion as would be the case for in-channel diffusion, z = 4 for 2D diffusion, and z = 6 for 3D diffusion.
In detail, two types of "diffusion contributes" would be responsible for the IVIM-derived diffusion coefficient D, the microcirculation or perfusion effects (pseudo-diffusion) and the true tissue diffusion.
Certainly, at the single-cell level, carbon dioxide diffuses more rapidly in buffer solutions and across artificial membranes than would be expected from its diffusion coefficients, and this facilitated diffusion is abolished by the inhibition of CA activity (Geers and Gros, 2000).
The relative stability and uncharged nature of H2O2 may permit its diffusion through membranes, though this diffusion would be less rapid than that of gases, such as nitric oxide (NO) and hydrogen sulfide (H2S).
