Several mechanism for this preferential formation
in the lipid phase has been presented; higher temperature
during frying than in the lean part with a higher water content, a
different chemical environment favouring nitrosation (Mottram
et al., 1977) which could give a higher solubility of both nitrogen
oxide (NO) and oxygen in the lipid phase (Liu, Miller, Joshi,
Thomas, & Lancaster, 1998) resulting in higher levels of nitrifying
species as e.g. N2O2.