Pomegranate (Punica granatum L.) peel lyophilized extract delays lipid oxidation in tuscan sausages

EnglishPomegranate (Punica granatum L.) contains a high concentration of antioxidant and phenolic compounds. Pomegranate peel extracts at different concentrations were used as natural antioxidant to increased the lipid stability of fresh Tuscan sausages, comparing with sodium erythorbate (SE). Peels were subjected to ultrasound-assisted aqueous extraction and lyophilization. The extract was previously characterized throught phenol and flavonoids determination. The Tuscan Sausages were prepared, and color, pH, peroxides, and thiobarbituric acid reactive substances were assessed at 1, 15, and 30 days of storage, at a mean temperature of 5 ± 1 oC and under a 12-hour light cycle/day. Sausages containing 0.05 and 0.1% of peel extract showed results similar to sodium erythorbate in lipid peroxidation. Sausages treated with pomegranate peel extracts showed an adequate global acceptability level in the sensory analysis. Pomegranate peel extracts are; therefore, a promising natural alternative for maintaining the lipid stability of Tuscan sausages, promoting the protection of the meat and in addition, being able to bring beneficial of the pomegranate to the human health portuguesA roma (Punica granatum L.) contem uma alta concentracao de compostos antioxidantes e fenolicos. Extratos de casca de roma em diferentes concentracoes foram utilizados como antioxidante natural para aumentar a estabilidade lipidica de linguica tipo Toscana, comparados ao eritorbato de sodio. As cascas foram submetidas a extracao e liofilizacao aquosas por ultrassom. O extrato foi caracterizado por determinacao de fenol e flavonoides. Os parâmetros cor, pH, peroxidos e acido tiobarbiturico foram avaliadas nos dias 1, 15 e 30 pos armazenamento, a temperatura de 5 ± 1 oC e ciclo de luz de 12 horas/dia. As linguicas contendo 0,05 e 0,1% de extrato de casca apresentaram resultados semelhantes ao eritorbato de sodio quanto a peroxidacao lipidica. Tambem apresentaram aceitabilidade global adequada na analise sensorial. Os extratos de casca de roma sao, portanto, uma alternativa natural promissora para manter a estabilidade lipidica das linguicas toscanas, promovendo a protecao e podendo trazer beneficios da roma a saude humana