Abstract
The antioxidant activity and biological compounds of ginseng root extracts were compared during pulsed electric field (PEF) and hydrolytic enzyme (HE) processing. The total ginsenoside content of ginseng root extracts by PEF (29.51 ± 1.67 mg/g) was higher than cellulase enzyme (HEC 23.74 ± 1.85 mg/g) and β-glucosidase enzyme (HEG 25.31 ± 2.34 mg/g) treatment. The ginseng root extracts obtained by PEF contained more total polyphenols (15.62 ± 1.07 mg/g) and flavonoids (16.58 ± 1.5 mg/g) than HEC (polyphenols 10.76 ± 1.22 mg/g; flavonoids 13.2 ± 1.63 mg/g) and HEG (polyphenols 14.09 ± 0.39 mg/g; flavonoids 15.37 ± 1.05 mg/g) treatment. Moreover, PEF processing showed more powerful scavenging activities against DPPH, ABTS radicals and FRAP activity of ginseng root extracts. Scanning electron microscopic examination of the ginseng root tissue with PEF processing provided direct evidence for the disruption of structure integrity. These results indicated that bioactive ingredients extraction with higher antioxidant activity could be obtained via PEF processing.
Published Version
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