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±0.09^a
5 kGy	0.74±0.11^ab
10 kGy	0.87±0.12^b
20 kGy	1.42±0.08^c

^a–c Different letters within the same column differ significantly (p<0.05).