99-13E

On the basis of recursive relations for memory kernels the generalized (${{k}}, \omega $)-dependent transport coefficients are defined for a binary fluids and calculated for a binary He$_{0.65}$-Ne$_{0.35}$ mixture. Extended set of dynamic variables including both hydrodynamic densities and their first time derivatives are taken into consideration. Connection between Onzager coefficients defined on this basis and experimentally observed transport coefficients is discussed.