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. 2013 Jun 18;52(2):928–935. doi: 10.1007/s13197-013-1059-y

Table 2.

Scavenging effects on DPPH and inhibiting effects on pancreatic α-amylase activity of Qingzhuan Tea fractions

Fractions	Scavenging effect			Inhibiting effect
Fractions	EC₅₀(μg/mL)	Regression equation	R²	IC₅₀(mg/mL)	Regression equation	R²
Chloroform fraction	244.6 ± 24.62	y = 0.1049x + 24.3730	0.9667	no activity
Ethyl acetate fraction	6.6 ± 0.90	y = 6.0419x + 10.2290	0.9668	4.6 ± 0.02	y = 9.5624x + 5.6776	0.9832
n-Butanol fraction	17.3 ± 2.89	y = 2.0741x + 14.0570	0.9680	11.3 ± 0.32	y = 4.7757x–3.8321	0.9497
Sediment fraction	54.5 ± 8.16	y = 0.6736x + 13.4080	0.9879	no activity
Residial aqua fraction	48.8 ± 6.66	y = 0.7486x + 13.4940	0.9835	no activity

n = 3, Mean ± SD