See Also: diffusion constant(medicine)
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Diffusion(medicine)
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diffusion(encyclopedia)
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facilitated diffusion(medicine)

pock (medicine) and diffusion constant (medicine)


pock (medicine)


pock
<medicine> A pustule raised on the surface of the body in variolous and vaccine diseases. "Of pokkes and of scab every sore." (Chaucer)

Origin: OE. Pokke, AS. Pocc, poc; akin to D. Pok, G. Pocke, and perh. To E. Poke a pocket. Cf. Pox.

Source: Websters Dictionary


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.