Table 2.
EC₅₀ values of 70% ethanol extract from ramie (Boehmeria nivea L.) leaves and vitamin C.

Antioxidant activity	EC50 values1) (μg/mL)
	Ethanol extract	Vitamin C
	Radical scavenging activity	34.72	4.65
Reducing power	44.39	6.69
Nitrite scavenging ability	52.99	15.45

EC₅₀ values for radical scavenging and nitrite scavenging activities are expressed as the effective concentration at which 50% of DPPH radicals and nitrites are scavenged; EC₅₀ value for reducing power is expressed as the effective concentration at which the absorbance is 0.5.