Second, through considering diffusion from a source to an active sink, for instance the movement of nutrient particles captured by suspension feeders, the authors establish the existence of a ...

Diffusion is the movement of particles from higher to lower concentrations. Diffusion happens naturally and so does not require energy. Substances like oxygen, carbon dioxide and glucose move in ...

A useful way to characterize this motion is via the "diffusion constant," which ... (Hydrodynamic effects are those induced by the particles' movement through the fluid, and steric effects arise ...

After further treatment, tiny roundish particles only a few nanometres ... (ACR), gives a graphic explanation of the movement of the atoms: 'The diffusion process can be compared with the ...