Efeito da adição de óleo essencial de pimenta rosa (Schinus terebinthifolius Raddi) microencapsulado em queijo minas frescal

• Autor(a) principal: Ribeiro, Alessandra Casagrande
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/1363
• topic: Microencapsulation; Spray drying; Microencapsulação; Secagem por atomização; Ciência e Tecnologia de Alimentos; Staphylococcus aureus; 664

Pink pepper is the fruit of the pepper tree (Schinus terebinthifolius Raddi), a native plant from Brazil. The extraction and characterization of its essential oil enables its industrial use. This work aimed to evaluate the effect of essential oil of pink pepper addition on Minas Frescal cheese. 95.36% of constituents of essential oil were identified, and the d-carene-3 was the major compontente. Pink pepper essential oil showed antioxidant (2.526 ± 0.277 µmols per ml Trolox oil) and antimicrobial characteristics regarding the development of Staphylococcus aureus. It was observed in the agar diffusion test, the formation of inhibition zone of 1.35 ± 0.322 cm, and in the minimum inhibitory concentration analysis, the value of 3.13%. Essential oil is sensitive to degradation, so it requires technological processes to ensure its action. In order to protect the essential oil, it was microencapsulated with the use of a spray dryer. To microencapsulate it, three wallpaper formulations were developed using different concentrations of gum arabic, modified starch and maltodextrin. The microcapsules were analyzed according to their physical, chemical and morphological characteristics and a formulation was selected to be added to Minas Frescal cheese. The formulation with 5% modified starch, 10% of maltodextrin and 5% arabic gum was selected. In order to define the cheese essential oil concentration, it was conducted a sensory test-ordering preference and the formulation with 0.01% essential oil was the most preferred. Control cheese (CO) and cheese with addition of pink pepper essential oil microcapsules (OEPR) were prepared and characterized. Concerning physico-chemical characteristics, CO and OEPR cheeses only differed on moisture. OEPR cheese presented good sensory acceptance. Global acceptance means were 7.6 ± 0.97, with no significant difference (p> 0.05) compared to control cheese (7.6 ± 1.18). To evaluate the effect of pink pepper essential oil on inhibiting the development of S. aureus, the oil was inoculated in CO and OEPR cheeses with initial concentrations of 106 CFU.g-1. The cheeses were stored in BOD at temperature of 4 ± 1 °C during the period of time of analysis: 0, 3, 6, 9, 12, 15 and 30 days. Results showed reduction of 1.53 cycles Log in cheese with the addition of pink pepper essential oil. According to these results, pink pepper essential oil is a feasible alternative of addition in Minas Frescal cheese due to its antioxidant and antimicrobial potential, and its sensory acceptance.