Phospholipids are another lipid class produced by the mixed species culture
growing on all three substrates during the exponential and stationary phases. The amount
of phospholipids produced by the mixed species culture ranged from 0.5 to 12 mg
depending on the carbon substrate and growth phase. The maximum content of
phospholipids were found when the mixed species culture was grown on UDA (Table 9).
Similar to free fatty acids and hydrocarbon, the content o f acetone mobile polar lipids
was equivalent to 3.5% of the total lipid classes and its content was highest when
UDA+PDB was the carbon substrate (Table 9). Twenty-nine mg of ethyl ketone were
observed during exponential phase and only when fungal cells were grown on
UDA+PDB (Table 9). No ethyl ketone production was observed during the stationary
phase (Table 10). Triacylglycerols and sterols were only produced under PDB.