Effectiveness of matured Morus nigra L. (black mulberry) fruit extract on 2,2-diphenyl-1-picrylhydrazyl (DPPH●) and hydroxyl (OH●) radicals as compared to less matured fruit extract

摘要

In this study, we investigated the antioxidant effect of the?Morus nigra?L. (black mulberry) fruit extracts in?2,2-diphenyl-1-picrylhydrazyl?(DPPH·)?and?hydroxyl (OH·)radicals environments gathered from the district of Elazig. Fruits were extracted with 80% methanol, and methanolic extract’s scavenging effect of DPPH·?radical was examined depending on?the?quantity. It was observed that less matured fruit extract’s (SMF) radical scavenging activity increased from the 50 to 250 μL, but decreased after 500 μL (p<0,001). As for matured fruits (MF), the most scavenging activity were observed in 50 and 100 μL extracts on DPPH·?and after 250 μL, it decreased (p<0,001). Methanol phases of extracts by evaporation were dissolved indimethyl sulfoxide?(DMSO)?in the environment in which with Fenton reaction, OH·radical is constituted; preventing the formation of?lipopolysaccharide (LPO)?and protective effect on unsaturated fatty acid were examined. In the Fenton reagent environment, preventing effect on the formation of LPO, it was determined that MF extract was more effectual than SMF extract (p<0,001). Accordingly, it was established that?M. nigra?fruit extract?has protecting effect on unsaturated fatty acids (p<0,001). We considered that fruit extracts having scavenging effects on DPPH·radical and diminishing the formation of LPO that was originated from OH·?radicals resulted from flavonoids in extracts. In the flavonoid analyses carried out with?high performance liquid chromatography (HPLC)?equipment, it was observed that fruit extracts has polyphenolic compounds such as rutin, resveratol, myricetin and naringerin.