Table 3. Nitric Oxide (NO) Scavenging Percentage of the Quercetin-Standardized Z. officinale Extract.

prepared concentration (mg/mL)	tested concentration (mg/mL)	average % inhibition
		before acid hydrolysis	after acid hydrolysis
0.1 mg/mL (quercetin)		74.53 ± 0.39
0.03125	0.015625	35.48 ± 1.24	41.91 ± 0.25
0.0625	0.03125	44.81 ± 1.06	46.19 ± 0.23
0.125	0.0625	46.22 ± 0.24	48.82 ± 1.39
0.25	0.125	46.92 ± 0.43	49.02 ± 0.22
0.5	0.25	48.09 ± 0.54	49.81 ± 0.72
1	0.5	48.83 ± 0.12	51.95 ± 0.51
2	1	52.65 ± 0.38	56.15 ± 0.64
Ic50		0.04 ± 0.00	0.04 ± 0.00