Exact(4)
In salty media such as sea water, however, Na, K, and other positively charged ions rapidly exchange for the extruded protons, which thus "diffuse" away (the "diffusion" actually being mediated by local cycling of water molecules between their H2O and H+/OH- forms, but the effect is the same as if the extruded protons individually moved away from the membrane).
The Fickian diffusion, actually, refers to a situation where water penetration rate in the gels is less than the polymer chain relaxation rate.
Changes to the local mean phenotype through local selection and simple mixing (i.e., diffusion) actually slightly hastens the evolutionary rescue effect over a model that considers only the impact of local selection.
This might be the ideal search mechanism in the case of high intracellular protein concentrations [75] and enforces the question whether facilitated diffusion actually plays a role for most DNA-binding proteins in vivo.
Similar(56)
From the perspective of molecular dynamics, gas diffusion is actually the result of irregular thermal motion of gas molecules.
The parameters influencing the charge diffusion in actually running dye-sensitized solar cells (DSCs) were carefully evaluated by impedance spectra simulation and correlated with the percentage of rutile and anatase in the respective mesoporous electrode.
Our results also demonstrate that for the typical distances and time scales governing the cytoskeleton of a T15 cell, simple diffusion is actually quite sufficient to explain the rapid emergence of a strong FLAP signal at the leading edge.
This is much smaller than the variations in diffusion time actually measured in our experiments, so it would be very unlikely that small variations in refractive index mismatch would cause the changes observed here.
Oxygen diffusion was actually faster in the bilayer than in bulk water.
Recently, we showed that the diffusion approximation actually underestimates the experimentally measured reduction in photon scatter at early times using a similar instrument configuration as we model here [ 20].
Bauböck (2007) further argues that the diffusion of external voting actually illustrates the transformations of the concept of citizenship in the age of globalization.
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