TABLE 3.

DPPH and ABTS free radical scavenging activity of WPEO and films (mg/ml).

Materials	Concentration (mg/ml)	DPPH		ABTS
		Free radical scavenging activity (%)	IC50 (mg/ml)	Free radical scavenging activity (%)	IC50 (mg/ml)
CS	–	56.79 ± 0.36	–	50.35 ± 0.44	–
CS/WPI	–	62.66 ± 1.11	–	55.73 ± 0.57	–
CS/WPI/TiO2	–	74.75 ± 1.03	–	66.26 ± 1.71	–
CS/WPI/WPEO	–	85.56 ± 2.09	–	84.88 ± 1.80	–
CS/WPI/WPEO+ TiO2	–	90.84 ± 2.45	–	90.74 ± 3.98	–
WPEO	0.1	47.28 ± 3.05	0.159	45.04 ± 3.03	0.171
	0.2	55.6 ± 2.10		54.43 ± 1.32
	0.4	69.33 ± 3.48		66.50 ± 2.76
	0.8	86.17 ± 3.07		85.64 ± 2.88
	1.0	91.35 ± 5.21		90.90 ± 4.49
BHT		0.09		0.11