Brownian motion Buffer

Brownian motion the constant, random motion of tiny chunks of matter. (Chap. 10, p. 342) buffer a solution that resists changes in pH when moderate amounts of acids or bases are added to it. (Chap. 15, p. 531)... 

A. E. Cohen and W. E. Moemer, Controlling Brownian motion of single protein molecules and single fluorophores in aqueous buffer. Optics Express 16 p. 6941-6956 (2008). 

Having now discussed hydrated volume, molecular shape and the frictional forces that oppose rotational and translational motion, we are now ready to discuss diffusion, the complete set of processes (including Brownian motion) that together bring about the bulk movement of biological macromolecules from one place to another in aqueous buffer solution. The processes that comprise diffusion are quantified by means of the concept of flux. Flux is defined as... 

III.2 Zero Field Reotation In free solution (no gel), DNA diffuses in response to the thermal Brownian motion. If we define by the friction coefficient per base pair (bp) of DNA due to the buffer, stressed molecular conformations relax to random-walk like conformations on a time scale given by the Rouse time6,34 ... 

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