  Chiral symmetry imposes some constrains on hadron correlation functions in
dense medium. These constraints imply a certain general structure of the two-
and three-point correlation functions of chiral partners and lead to the effect
of mixing arising from the interaction of the long-ranged nuclear pions with
corresponding interpolating currents. It reflects the phenomena of partial
restoration of chiral symmetry. We consider soft pion corrections for quark
condensates and several possible pairs of chiral partners for both mesons and
nucleons and analyse their mixing patterns. We explored both naive and mirror
assignments for the chiral partner of nucleon and discussed possible
phenomenological consequence.
