Abstract

IN VITRO ANTIOXIDANT AND RADICAL SCAVENGING ACTIVITY OF MARINE MICROALGA NANNOCHLOROPSIS OCULATA

Sangeetha P., Anuradha V.*, Suganya V. and Bhuvana P.

ABSTRACT

The study focuses on determining the antioxidant properties of the methanol extract from the microalgae Nannochloropsis oculata. The evaluation of the total phenolic content, total flavonoid content, total antioxidant activity, DPPH Radial scavenging assay, Deoxyribose Radial scavenging activity, Hydrogen peroxide (H2O2) Radical scavenging activity, ferric reducing antioxidant power assay scavenging of superoxide radical, ABTS, Lipid peroxidation assay and β-carotene linoleic assay were carried out for methanolic extract of Nannochloropsis oculata. The antioxidant assay was performed at the concentration ranging from 100 - 500μg/ml. The results showed that the higher antioxidant activity value was observed in methanol extract of Nannochloropsis oculata when compared with standard drug. Hence microalgae have received special attention as a source of natural antioxidants in comparison with macroalgae and were found to be a good source of antioxidants.

Keywords: Total Phenolic Content, Total Flavonoid Content, Microalgae, Nannochloropsis oculata.