RESULTS AND DISCUSSION
The crude extract of G. changii was screened for DPPH
radical scavenging activity according to the method described
and the results of the screening are shown in Figure 1 as
comparable with known antioxidant.
The methanolic extract tested showed a lower reducing
power activity than BHT and vitamin E. BHT showed the
highest reducing power activity (66.0%) followed by Vitamin
E (40.1%) and the methanolic extract (4.3%) respectively at the
concentration tested (1 mg/ml). We therefore suggest that at
proper concentration of the crude extracts of G. changii may
act as free radicals scavenger and may react with free radicals
to convert them to more stable products and terminate radical
chain reaction [12]. Our result demonstrated that crude extract
of G. changii thereby has moderate free radical scavenging
activity.
4.3
41
66
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
BHT Vitamin E Sample