Table 2 Contents (mg/mL) of total polyphenolic compounds in Asparagus cochinchinensis (Lour.) Merr. (Asparigi radix) extracts after gamma-irradiation at designated doses

Irradiation dose Content of total polyphenolic compounds
Control 0.61±0.09a
5 kGy 0.74±0.11ab
10 kGy 0.87±0.12b
20 kGy 1.42±0.08c
a–c Different letters within the same column differ significantly (p<0.05).