[en] Real parts of the forward anti p-n p-n scattering amplitudes in the high energy region were calculated. To this end expansion of the dispersion integral from the unphysical region in a power series was performed. In the asymptotic region a possibility of rising total cross-sections was taken into account. A comparison of the obtained results with those of earlier works reveals that the Re/Im dependence on energy is reasonable within the high energy region. (author)