See Also: diffusion constant(medicine)
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diffusion constant (medicine)


diffusion constant -->
diffusion coefficient


For the translational diffusion of solutes, diffusion is described by Fick's First Law, that states that the amount of a substance crossing a given area is proportional to the spatial gradient of concentration and the diffusion constant (D), that is related to molecular size and shape. A useful derived relationship is that the mean square distance moved by molecules in time t is 6Dt.