12.06 mg/mL for the Huizhou sample to 34.27 mg/mL for
the Liuzhou sample.
3.6. Hydroxyl radical scavenging activity
The hydroxyl radical is an extremely reactive in
biological systems and has been implicated as highly
damaging species in free radical pathology, capable of
damaging biomolecules of the living cells (Halliwell,
1997; Waling, 1975). As shown in Table 3 and Fig. 4,
the Chuxiong sample showed a higher hydroxyl radical
scavenging activity than other samples. The lowest
hydroxyl radical scavenging activity was found in the
Guangzhou sample.
3.7. Reducing power
The reducing power has been used as one of important
antioxidant capability for medicinal herbs (Duh et al.,
1999; Duh and Yen, 1997). The reducing power of these
emblica extracts was dose-dependent (Fig. 5). All of these
emblica extract samples exhibited high reducing power.
Furthermore, the Huizhou sample had a higher reducing
power than other samples.
3.8. Determination of capability of lipid peroxidation
inhibition
Lipid peroxidation (LPO) can inactivate cellular components
and plays an important role in oxidative stress in