Table 1
Contents of total phenolics and sinapic acid and DPPH radical scavenging activity of crude extract and hydrolyzed extract obtained from rapeseed cake

Rapeseed cake extracts	Total phenolic content (SAE1) mg/g)	Sinapic acid content (mg/g)2)	DPPH free radical scavenging activity (%)
Crude extract3)	33.03±6.88^b5)	0.07±0.01^b	42.64±2.49^b
Hydrolyzed extract4)	693.92±28.34^a	18.97±0.57^a	94.26±0.38^a

SAE, sinapic acid equivalent.
Sinapic acid contents (mg/g) of crude and hydrolyzed extracts after concentration with vacuum evaporator and dried under nitrogen.
Rapeseed cake extract with 80% ethanol.
NaOH-mediated hydrolyzed extract of combined fractions eluted with H2O (I), 30% ethanol (II) and 50% ethanol (III) from crude extract
^a-bMeans with different letters within the same column are significantly different at p<0.05 by student t-test (n=2).