Antioxidant properties of ethanolic extract of sugar beet pulp

Abstract

The ethanolic extract of sugar beet pulp at 100% exibited good antioxidant activity of 69.74%. It showed an excellent scavenging activity on 1,1-diphenyl-2-picrylhydrazyl radicals (84.94%) and was a mild chelator for ferrous and cupric ions. On the basis of some identified phenolic acids in ethanolic extract from sugar beet pulp it is concluded that predominant acids (ferulic, gentisic and p-coumaric acid), which have been previously evidented as relatively potent antioxidants, contribute to the antioxidant properties of the investigated extract. Antioxidative nature of ethanolic extract from sugar beet pulp, that is sugar beet pulp itself, indicate that it could be used as antioxidative component for decreasing oxidative changes in foods.Etanolni ekstrakt izluzenog samlevenog repinog rezanca (100%) ostvario je antioksidativnu aktivnost od 69,74%. Navedeni ekstrakt ispoljio je i odlicnu antiradikalsku aktivnost na 1,1,-difenil-2-pikrilhidrazil radikale (84,94%) dok je njegov helatizirajuci efekat na Fe2+ i Cu2+ bio relativno slab. Na osnovu prisustva nekih fenolnih kiselina identifikovanih u ispitivanom etanolnom ekstraktu zakljuceno je da su dominantne kiseline (ferulna gentisticna i p-kumarinska), od ranije poznate kao relativno potentni antioksidanti, odgovorne za antioksidativna svojstva ispitivanog ekstrakta. Antioksidativna priroda etanolnog ekstrakta repinog rezanca, odnosno i samog repinog rezanca, ukazuje na mogucnost njegovog koriscenja kao antioksidativne komponente za smanjivanje oksidativnih promena u hrani.