investigated the retention of quercetin derivatives from apple peel extract in muffins during baking. After 20 min at 175 C,they found 55.9%e73.4% of the quercetin glycosides added to the
muffin dough (Rupasinghe et al., 2008). Also, the 3-glycosidic bond is described as more
thermo-sensitive than glycosylation at the 40-glycosidic position