Physicochemical characterization and antimicrobial activity in novel systems containing buriti oil and structured lipids nanoemulsions

• Main Authors: K.M.M. Leão, L.V.C. Reis, P Speranza, A.P. Rodrigues, A.P.B. Ribeiro, J.A. Macedo, G.A. Macedo
• Format: Article
• Language: English
• Published: Elsevier 2019-12-01
• Series: Biotechnology Reports
• Online Access: http://www.sciencedirect.com/science/article/pii/S2215017X1930164X

Buriti oil nanoemulsions were prepared using non-interesterified buriti oil or buriti oil interesterified for 6 or 24 h (NBO, NBO6h, and NBO24 h), respectively. The aim was to investigate the effects of interesterified oils on the physicochemical and biological properties of nanoemulsions. Samples were stored at 4 and 25 °C for 30 days, and their physicochemical properties and biological activities were evaluated. The mean droplet diameter of nanoemulsions ranged from 196 to 270 nm. NBO24 h had the smallest droplet size and was the most stable during the storage period. Furthermore, NBO24 h demonstrating the good oxidative stability, had a high antioxidant capacity, and was less susceptible to droplet aggregation. NBO and NBO24 h had similar biological activity against Gram-negative bacteria (Escherichia coli O157: H7); bacterial growth was inhibited by at least 60% at 3.12 mg mL−1. The nanoemulsions have interesting properties for the production of pharmaceutical, cosmetic, and food formulations with antimicrobial activity. Keywords: Antimicrobial, Buriti oil, Droplet size, Nanoemulsion, Structured lipids, X-ray