  We report in this paper the temperature and mangetic field dependence of the
conductance in the polycrystalline film of titanium nitride, before and after
heating at ambient conditions. The difference between the two films is the room
temperature sheet resistance which remains within 15 percent and both the films
show superconducting transition at lower temperatures. The zero field and the
high field data, respectively, corresponds to the superconducting and the
normal states. Both the films display Atshuler-Aronov zero bias anamoly in
their normal states, and the superconducting gap openeing up at low fields.
However the heated film has a smaller gap owing to more pronounced zero bias
suppression of the density of states. The normal states in both the films are
similar to the quasi-2d-disordered metal and its behavior is studied with
temperature. Our data suggests that the zero bias anamoly suppresses the
superconducting gap with increase in the disorder.
