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. 2024 May 13;27(6):1046–1050. doi: 10.1038/s41593-024-01638-y

Extended Data Fig. 6. The time course of C(r, t).

Extended Data Fig. 6

a, b According to equation [2], the concentration at a fixed distance, r, from a Gaussian source (solid lines) reaches a peak with time that depends only on the diffusion coefficient D, while the peak concentration does not change. Almost identical concentrations are predicted if the source is a sphere, rather than a Gaussian, containing the same number of moles (dashed lines). (The equation for the concentration as a function of time from a spherical source has been solved by Crank26.) c,d, The peak concentration with time for a fixed diffusion coefficient, decreases with increasing distance r, with relatively small changes in the time to peak.