Disgusting oil experiment: effect on oil degradation due to long heating during deep frying process
Backstory Upon seeing the deep dried insects, instead of being disgusted by the insects themselves, we are more shocked by the blackish oil. As we know, degradation of oil can happen under oxygenated environment, heat and light, creating substances with unpleasant smell and taste. Which surely happens in those reused "thousand years" oil for street food. We can already imagine why would they always add excessive spices to cover the rancidity of oil. In fact, we can even see in many restaurant, the usage reused oil can be seen by the weird precipitate on the bubbling oil, which are mostly carcinogenic. Here we want to investigate the effect of long term heating on rancidity of oil in deep frying processes. Theory Oxidative rancidity is associated with the degradation by oxygen in the air. The double bonds of an unsaturated fatty acid can be cleaved by free-radical reactions involving molecular oxygen. This reaction causes the release of malodorous and highly volatile al...