Spectroscopic properties of in vivo biological systems: boson radiative equilibrium with steady-state nonequilibrium molecular systems.

An analysis of the boson (phonon and photon) distribution in the presence of a steady-state, nonequilibrium molecular subsystem is presented, providing thermodynamic criteria for the boson chemical-potential term, the generalized vibrational emissivity function, and the Bose type of condensation predicted by Fröhlich.