2.2. Extraction,dyeingandmordanting Natural flavonedye(Quercetin)wasextractedfromun- irradiated(NRP)andirradiatedonionpowder(RP)usingthe
25922and Pasteurellamultocida (P.multocida) (localisolate).The antibacterialactivityofthesampleswasdeterminedbydisc diffusionmethod.Briefly 100mL ofbacterialsuspensionoftested microorganismscontaining107 CFU/mLofbacteriacellsonnutrient agarmedium