The rate of diffusion is proportional to the concentration difference between compartments of the diffusing molecule.
The rate of diffusion of a solute depends on the concentration gradient and its diffusivity (solute permeability).
Because the rate of diffusion becomes limiting beyond a certain size, however, the circulatory system becomes functional early in development, often before other organs and systems are obvious.
These are, in part, related to physical factors, such as the rate of diffusion of gases through the sediment and the rate of sedimentation, in part due to the extent of organic matter.
We conclude that impurities will bind vacancies to themselves, reducing the rate of diffusion.
The rate of diffusion shows a clear dependence on solvent structure.
Then, the rate of diffusion picks up, as "early adopters," another small group of consumers in contact with innovators, adopts the product too.
n = 0.5 indicates case I, which is a perfect Fickian process, whereby the rate of network relaxation is faster than the rate of diffusion.
When n = 1.0, it indicates a non-Fickian diffusion, whereby water transport is controlled and the rate of diffusion is faster than the network relaxation.
