  We have studied the effects of the nucleon weak magnetism and the neutrino
electromagnetic properties on the neutrino and antineutrino mean free paths for
all types of neutrinos. In the calculation, we consider matters with and
without neutrino trapping as the target. We have found that the difference
between the two mean free paths depends not only on the neutrino energy, but
also on the matter density as well as matter constituents. Compared to the
nucleon weak magnetism, the neutrino electromagnetic properties are found to
have negligible effects on this difference.
