  The understanding of transport processes inside the stars is one of the main
goals of asteroseismology. Chemical turbulent mixing can affect the internal
distribution of \mu near the energy generating core, having an effect on the
evolutionary tracks similar to that of overshooting. This mixing leads to a
smoother chemical composition profile near the edge of the convective core,
which is reflected in the behavior of the buoyancy frequency and, therefore, in
the frequencies of gravity modes. We describe the effects of convective
overshooting and turbulent mixing on the frequencies of gravity modes in B-type
main sequence stars. In particular, the cases of p-g mixed modes in beta Cep
stars and high-order modes in SPBs are considered.
