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Fig. 7 | Fluids and Barriers of the CNS

Fig. 7

From: Analysis of convective and diffusive transport in the brain interstitium

Fig. 7

Péclet number versus apparent diffusivity for various molecules of interest in brain transport. L = 250 μm, \(v\) = 15 μm min−1, and apparent diffusivity (D*) specific to each molecule. \(Pe = v\) L/D* is the ratio of convective to diffusive transport rates. For \(Pe \approx 1\), diffusive and convective rates are balanced; for \(Pe > 1\), convection exceeds diffusion. The graph shows for \(v\) = 15 μm min−1 bulk flow is not large enough to be dominant and not small enough to be ignored

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