Abstract
The concentration gradient of O 2 outside cells and oxygen-consuming particles and fibres with immobilized glucose oxidase (EC 1.1.3.4) has been directly measured with oxygen microelectrodes. Measurements have been performed in systems with different relative velocities between particles and solvent. In systems with a relative velocity equal to zero (unstirred systems), the thickness of the diffusion layer was found to be approximately the radius of the particles, and much greater than the radius of the fibres. This is in agreement with the results predicted by theoretical analysis. The thickness of the diffusion layer was not negligible, even at the highest relative velocity (1.5 x 10 −4 ms −1 used in this study.
Published Version
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