Ternary diffusion across chemically well-defined membranes containing mobile carriers often shows symmetrical behavior consistent with the Onsager reciprocal relations. This symmetry, exact at small gradients and a good approximation at large gradients, is a result of stoichiometric restraints.
Bibliographical noteFunding Information:
The author benefited hrom discussions with Professor H.L. Toor. The work was supported by the National Institute of Arthritis, Metabohsm, and Digestive Diseases, Grant l-ROl-AM-16143, and the National Science Foundation, Grant GK-32313. The author is supported by a National Institutes of Health Career Development Award lKO-AM-70461.