Table 2.

Unstirred layer width and AscH acid permeability P for various gradients of Na-Asc.

Na-l-Ascorbate Gradient (mM)	USL Width $\mathit{\delta } \left(\mathsf{\mu }\mathbf{m}\right)$	AscH Membrane Permeability P (cm/s)
200	260	$1.15 \times {10}^{-8}$
380	245	$1.03 \times {10}^{-8}$
542	215	$1.03 \times {10}^{-8}$
688	195	$1.19 \times {10}^{-8}$
Average		$1.1 \pm 0.1 \times {10}^{-8}$