Table 5. The reducing power activity (OD at 720 nm) of broccoli cooked with different methods

Extraction solvent	Conc. (μg/mL)	Cooking method
Extraction solvent	Conc. (μg/mL)	Fresh	Steaming	Boiling
Distilled water	400	0.23±0.00^1)a2)D3)	0.21±0.00^bD	0.20±0.00^cD
Distilled water	800	0.29±0.00^aB	0.27±0.00^bB	0.26±0.00^cB
80% Etanol	400	0.28±0.00^aC	0.24±0.00^bC	0.22±0.00^cC
80% Etanol	800	0.34±0.00^aA	0.32±0.00^bA	0.29±0.00^cA

All values are mean±SD (n=3).
Means with different superscript letters (^a-c) in the same row are significantly different (p<0.05) by Duncan’s multiple range test.
Means with different superscript letters (^A-D) in the same column are significantly different (p<0.05) by Duncan’s multiple range test.