  Conformations of a single semiflexible polymer chain dissolved in a low
molecular weight liquid crystalline solvents (nematogens) are examined by using
a mean field theory. We takes into account a stiffness and partial
orientational ordering of the polymer. As a result of an anisotropic coupling
between the polymer and nematogen, we predict a discontinuous (or continuous)
phase transition from a condensed-rodlike conformation to a swollen-one of the
polymer chain, depending on the stiffness of the polymer. We also discuss the
effects of the nematic interaction between polymer segments.
