Physicochemical properties of Kakol (<i>Suaeda aegyptiaca</i>) essential oil nanoemulsion and its effect on the storage quality of rainbow trout (<i>Oncorhynchus mykiss</i>) during cold storage

The study aims to analyze the chemical composition of Suaeda aegyptiaca essential oil (PSAE) by GC–MS, produce nanoemulsified (NSAE) using ultrasound, and compare antimicrobial antioxidant activity PSAE NSAE in laboratory medium rainbow trout fish (Oncorhynchus mykiss). Geranyl-acetone (30.52%) p-Vinylguaiacol (10.66%), (e)-β-ionone (7.79%) were main compounds. mean droplet size diameter, polydispersity index, viscosity 179.67 nm, 0.255, 0.96 cP, respectively. showed a moderate antiradical potential against DPPH- ABTS-free radicals (50 < IC50 250 μg mL−1). There was no significant difference between scavenging (p > .05). E. faecalis K. pneumonia most lowest sensitive bacteria NSAE, Examining different treatments on shelf-life minced that Kakol could improve 12.5% 60% (depending quality index). bioactivity which means nanoemulsion acceptable performance at lower concentrations.