Two mechanisms are involved in the
destabilization of the gas cells during proofing, disproportionation
and coalescence. Disproportionation (analogous to Ostwald ripening
in emulsions) involves a proposed diffusion mechanism by
which CO2 migrates from smaller gas cells to larger ones. Gas cells
coalescence is caused by the rupture of the thin dough films, which
results in gas loss and an irregular crumb structure