Table 3.
Free radical scavenging activities by TEAC assay and inhibitory effects on plasma lipid peroxidation induced by H2O2 or H2O2/Fe2+ measured for compounds 3−11.
| compound | TEAC value (mM) | Inhibition of lipid peroxidation induced by H2O2 (%) |
Inhibition of lipid peroxidation induced by H2O2/Fe2+ (%) |
|---|---|---|---|
| 3 | 2.00 ± 0.03 | 19.9 ± 2.6 | 18.8 ± 3.1 |
| 4 | 0.99 ± 0.01 | 33.6 ± 3.2 | 11.4 ± 2.2 |
| 5 | 1.65 ± 0.02 | 35.4 ± 3.6* | 14.2 ± 2.1 |
| 6 | 2.06 ± 0.03 | 44.4 ± 4.2 | 34.1 ± 3.4 |
| 7 | 1.98 ± 0.03 | 23.1 ± 2.8 | 19.9 ± 2.0 |
| 8 | 0.75 ± 0.01 | 33.3 ± 3.3 | 14.4 ± 1.9 |
| 9 | 1.55 ± 0.02 | 5.7 ± 1.6 | 20.1 ± 3.6 |
| 10 | 0.87 ± 0.01 | 32.0 ± 3.4 | 24.4 ± 3.3 |
| 11 | 0.60 ± 0.01 | – | 7.0 ± 2.3 |
| quercetina | 2.03 ± 0.03 | – | – |
| curcuminb | 20.6 ± 4.1 | 23.2 ± 2.4 |
areference compound used for TEAC assay; breference compound used for TBARS assay. *p < 0.01. -, Quercetin was used as reference standard only for TEAC assay.