Diffusion gradientDiffusion gradient

A diffusion gradient is a gradient in the rates of diffusion of multiple groups of molecules through a medium or substrate. The groups of molecules may constitute multiple substances, portions of the same substance that have different temperatures, or other differentiable groupings.

• Double diffusive convection, in which density differences, often reflecting temperature differences, affect fluid flows
• Diffusion MRI, which visualizes tissues on the basis of diffusion gradients of various molecules, especially water molecules
• Immunodiffusion, which can use diffusion rate differentials to separate multiple immune complex species

Read it on Wikipedia · Version rolled