Abstract

PAZMINO, Anderson et al. Evaluation of PLA active biodegradable films incorporated of essential oils to inhibit microbial adhesion. La Granja [online]. 2022, vol.36, n.2, pp.18-31. ISSN 1390-8596.  https://doi.org/10.17163/lgr.n36.2022.02.

An evaluation of incorporated polylactic acid (PLA) active biodegradable films of essential oils to inhibit microbialadhesion was performed using a fractional exploratory design, combining the factors, amount of PEG 400 plasticizer (10 and 20%), amount of cinnamon essential oil (0.5% and 1%), amount of oregano essential oil (0.5% and 1%), Salmonella spp. concentration (103 CFU mL-1 and 104 CFU mL-1) and Staphylococcus aureus concentration (103 CFU mL-1 and 104 CFU mL-1). The results of microbial adhesion inhibition test showed that the maximum inhibition percentage reached 73.82 ± 0.35 % corresponding to experiment 7 (bce), which contains 10% of PEG 400, 1% of cinnamon essential oil, 1% of oregano essential oil, 103 CFU mL-1 of Salmonella spp. concentration, 104 CFU mL-1 of Staphylococcus aureus concentration. Statistical analysis determined that there is strong significant evidence (p-value = 0.0283) that Staphylococcus aureus concentration influences the inhibition percentage to microbial adhesion; as well as that the cinnamon essential oil- Salmonella spp. interaction has little significant evidence (p-value = 0.0711) that influences the inhibition percentage. Inhibition results greater than 60% have the highest concentration of Staphylococcus aureus as a common factor. PLA active biodegradable films with a higher inhibition percentage can potentially be used in the food industry as a barrier mechanism to avoid bacterial contamination.

Keywords : biopolymer; food; barrier; infectious agent.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )