Derivation of Practical Kedem - Katchalsky Equations for Membrane Substance Transport
نویسنده
چکیده
The following paper includes a derivation of practical KedemKatchalsky (K-K) equations for the volume flow Jν and the solute flow Js for non-electrolytes. This derivation makes the equations clearer and consequently their interpretation also becomes easier. The equations have been derived on the basis of the analysis of the membrane transport generated by simultaneous action of two thermodynamic stimuli: the hydrostatic Concepts of Physics, Vol. V, No. 3 (2008) DOI: 10.2478/v10005-007-0041-8 459 pressure difference ∆p and the osmotic pressure difference ∆Π. Furthermore, the derivation of the solute permeability coefficient ω, which results from K-K equations, is also presented in this paper. The formulas for coefficients characterizing membrane permeability, ωd and ωk, as well as their derivation and physical interpretation are also presented below. Finally, a formula for the membrane coefficient LD, which represents a diffusional mobility, is derived. 460 Concepts of Physics, Vol. V, No. 3 (2008) Kedem-Katchalsky equations for membrane substance transport
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