Modelling the inactivation of PEF time and strength
for soybean lipoxygenase in soymilk
Inactivation of pulsed electric fields (PEF) on soybean lipoxygenase (SLOX) was studied at different time andstrength. Soymilk was exposed to treatment time from 172 to 1036 μs for up to 42 kV/cm PEF strength. Inactivation of SLOXincreased as treatment time and pulse strength increased. About 88% SLOX was inactivated when SLOX was exposed toPEF at 42 kV/cm and 1036 μs at 25°C, achieving maximum inactivation of SLOX. Inactivation of SLOX by PEF at different timeand strength was modelled. The first-order kinetics exponential decay model described successfully the relation betweenthe residual activity of SLOX and PEF parameters (treatment time and pulse strength).