Abstract
A kind of “competitive diffusion” and the normal force of gravity can interact, leading to a microconvectional instability called “droplet sedimentation.” This type of phenomenon is demonstrated in an initially stably layered flow-system, and used to transport lysozyme rapidly into its physically separated substrate. In this manner a continuous steady state enzyme-substrate reaction is brought under the complete control of gravity and the diffusion coefficients of inert components of the system. If such a mechanism should play a role in any biological function, then in the “weightless” condition the function would be altered or removed.
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