Influence of phenolic compounds on antioxidant capacity of leaves extracts of Moringa oleifera from Tamanrasset region

Abstract

In the present research the crude extract and all fractions of Moringa oleifra leaves grown in Tamanrasset, were examined for its antioxidant activities by using three different assays such as DPPH scavenging activity, superoxide anion scavenging activity and phosphomolybdenum capacity. The quantitative estimation of total phenolics, flavonoids and tannins content additionally was calculated by spectrophotometric methods. The results showed that the extracts contained total phenolic compound at concentration of 32.985±0.07 to 309.418 ± 0.71 (mg GAE/g EW) and higher total flavonoids contents of 5.192 ± 0.17 to 44.695 ± 0.23 (mg QE/g EW), for total tannins contents of 3.864 ±0.07 to 15.148 ± 0.66 (mg/g). It also this experiment found out that each extract confirmed a good antioxidant. Consequently, it can be concluded that the phenolic compounds content may be answerable for the good activities of Moringa oleifra leaves.