bipolar pulses of 4 ls, the antioxidant activity was greater than
that observed after heat-treatment (Table 3). After HIPEF
treatments of 400 ls at 30 kV/cm, 200 Hz and bipolar
pulses of 2 or 4 ls, orange juice and gazpacho showed
higher levels of free radical-scavenging activity than did
heat-treated products (Table 4). The antioxidant capacities
obtained in heat- and HIPEF-treated foods suggested that
HIPEF treatment may induce changes in antioxidant compounds
of orange juice and gazpacho.