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Resumo The incorporation of antimicrobial substances in package films aims at reducing food microbial contamination. Among them, the phenolic compounds extract from plants have received special attention being natural and attending consumer demand. The aims of this research were to evaluate the sensitivity of Salmonella spp (S. Enteritidis ATCC 13076, S. Give, S. Enteritidis) and Pseudomonas spp (P. aeruginosa ATCC 27853, P. fluorescens, P. putida) to eugenol and/or limonene incorporated into the alginate based edible film. Alginate based films were prepared by mixing glycerin (2%) in distilled water previously to the eugenol and/or limonene addition. Eugenol and limonene concentrations were incorporated based on the central composite rotational design 2² with three center points. The variables were the concentration of eugenol (0 to 0.4%) and limonene (0 to 0.8%). Sodium alginate (3%) was then added to the solution and CaCl 2 was used as a crosslinking step. The film-forming solution was then dried. After, a second crosslinking step was performed. The in vitro antimicrobial activity was carried out by the agar diffusion method using 5mm diameter films placed on Mueller Hinton agar plates, which had been previously spiked with 10 6 CFU.mL -1 of each of strains of Salmonella spp and Pseudomonas spp. After incubation, the zone of inhibition was measured (mm²). Experimental data were analyzed using the software Statistica 10.0. The incorporation of eugenol (0.2%) and limonene (0.2%) into the alginate based film was the most effective combination against all the Pseudomonas |
