After a second mixing step, 30 g portions of the
mixtures were placed into 60 mm diameter petri dishes. Half of the
samples were aerobically stored at 10 °C, whereas the other half
were vacuum-packaged in low permeability laminated bags (35 and
150 cm3/24 h·m2 · bar to O2 and CO2, respectively) and stored at the
same temperature.