This is the result of the boundary layer at the evaporation surface decreasing with flow velocity, decreasing the diffusion distance in the stagnant layer.

Fine lamellae solve this problem by shortening the diffusion distance between phases, but their high surface energy makes them unstable and prone to break up when annealing allows diffusion to progress.

By controlling the flow rate, diffusion distance, and residence time of the fluid in the filter, cells are excluded from the filtrate by virtue of their slower diffusion rate.

The diffusion distance at time between two points can be measured as the similarity of two points in the observation space with the connectivity between them.

Both are important for de novo angiogenesis that is required for tumour growth beyond the limit of diffusion distance of oxygen in tissues.

Immature chorionic villi are larger and have more central blood vessels; thus, the diffusion distance for gas and nutrient exchange is larger and, therefore, placental function is impaired.

Leaves are also very thin so the diffusion distance is small.

To decrease run times and increase selectivity, smaller diffusion distances were required.

By nature of their structure, they also have very short diffusion distances and multiple pathways are available for solute dispersion.

Although its lifetime is fairly short (about 50 microseconds), superoxide has the potential to reach cell surfaces since it has a diffusion distance of about 320 nm.