Free radical scavenging, reducing power, phenolic and biochemical composition of Porphyra species

Abstract

ABSTRACT Inorganic elements, organic composition and antioxidant properties of P. indica and P. veiatnamensis , were investigated. Heavy metals were found below toxic level and protein and ash contents were found to be the most abundent components. Antioxidant potentials of algae was assessed through phenolic content, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) activity, hydrogen peroxide (H 2 O 2 ) scavenging power and reducing potential. A dose-dependent free radical scavenging action against DPPH and H 2 O 2 , and concentration dependent reducing potential were exhibited by the Porphyra spp. Practical Application Overall data suggested that, theses seaweeds could be a potential rich source of natural antioxidants and a stuff of high nutritional values. These seaweeds were practically importance in the pharmaceuticals (medicine) and food industries for making candies and jelly’s. Keywords : Marine algae, Porphyra , Antioxidant, Nutraceuticals Introduction