  The report presents pressure-related broadband dielectric spectroscopy (BDS)
studies in liquid crystalline octyloxycyanbiphenyl and its nanocolloid with
BaTiO3 nanoparticles, focused on the low-frequency ionic domain and the impact
of pretransitional fluctuations. Hence basic exogenic (pressure) and endogenic
(nanoparticles) impacts on dielectric properties are addressed. The innovative
derivative-based analysis revealed functional 'critical-like' descriptions of
ionic contributions to dielectric permittivity and electric conductivity. The
supplementary dielectric constant scan, yielding insight into dipole-diple
arrangements, is also presented. Studies cover the puzzling case of complex
liquid (SmA) - Solid crystal phase transition, revealing relatively strong
critical-like premelting effects, which have hardly been observed for the
discontinuous 'melting transition' so far.
