Table 3.
DPPH free radical scavenging activity, based on catechin equivalent antioxidant capacity (CEAC)

Sample	CEAC
Catechin	1.00
Pure PCs	0.95
CPCs	1.03
PPCs	0.94
LMWPCs	0.96

Pure PCs was prepared from P. radiata bark using a Sephadex LH 20. DPPH = 1,1-diphenyl-2-picrylhydrazyl radical.