"rate of diffusion" is a correct and usable phrase in written English.
It is typically used in scientific or technical writing to refer to the speed at which a substance spreads or disperses throughout a medium. Example: The rate of diffusion of oxygen in water is affected by temperature and pressure.
Doubling the pressure of a diffusing mixture halves the diffusion coefficient, but the actual rate of diffusion remains unchanged.
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.
Although Ea increases by several kBT as denaturant concentration decreases, the overall rate of diffusion nevertheless increases.
The fastest rate of diffusion through SC lipid model membranes occurred in the case of the most hydrophilic drug, urea.
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.
Every time the nuclei divide the distance between them halves, and the rate of diffusion changes according to D a (n) = 4 D a (n-1).
The rate of diffusion-impeded chemical reaction is used as an example of compactness as a correlator.
This has a negative effect on the rate of diffusion-limited G-protein activation by activated ligand-bound receptors in lipid rafts.
Yet, theoretical models have shown that the placement of traps can affect the rate of diffusion-limited processes substantially [ 41].
