  We study the impact of possible high density baryonic bubbles on the early
formed QSO, IGM, and metal poor stars. Such bubbles could be created, under
certain conditions, in Affleck-Dine model of baryogenesis and may occupy a
relatively small fraction of space, while the dominant part of the cosmological
volume has the normal observed baryon-to-photon ratio $\eta = 6\cdot 10^{-10}$.
The value of $\eta$ in the bubbles, could be much larger than the usually
accepted one (it might be even close to unity) without contradicting the
existing data on light element abundances and the observed angular spectrum of
CMBR. We find upper bounds on $\eta$ by comparing heavy elements' abundances
produced in BBN and those of metal poor stars. We conclude that $\eta$ should
be smaller than $10^{-5}$ in some metal poor star regions.
