Comparative Antioxidant Activity of Water Extract of Azadiractha indica Stem Bark and Telfairia occidentalis Leaf

C.P. Anokwuru ； O. Ajibaye ； A. Adesuyi

《Current Research Journal of Biological Sciences》 3卷4期 (2011/07) Pp. 430-434

並列摘要

The antioxidant activity of Azadirachta indica stem bark and Telfairia occidentalis leaf aqueous extract was studied. The Total Phenolic Content (TPC) was determined using folin Ciocalteu method while the Total Flavonoid Content (TFC) was determined using aluminum chloride method. Antioxidant activity was determined using 2, 2-diphenyl-1-picryl hydrazine (DPPH) inhibition. Telfairia occidentalis extracted more phenols (11.32 g GAE/ 100 g) than Azadirachta indica stem bark (10.74 g GAE/100 g) but not significantly different (p＜0.05). Azadirachta indica stem bark extracted more flavonoid content (5.21g QE/100 g) than Telfairia occidentalis leaf (0.96 g QE/100 g). Azadirachta indica stem bark inhibited more free radicals (83%) than Telfairia occidentalis leaf (65%). This study showed that Azadirachta indica stem bark had higher antioxidant activity compared to Telfairia occidentalis leaf.

並列關鍵字

Antioxidant activity ； polyphenols ； DPPH free radicals ； Azadirachta indica ； Telfairia occidentalis