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Effect of storage and packaging on fatty acid composition and oxidation in dry fermented sausages made with added olive oil and antioxidants

Ansorena, D., Astiasaran, I.
Meat science 2004 v.67 no.2 pp. 237-244
sausages, pork, fat substitutes, olive oil, natural additives, butylated hydroxytoluene, butylated hydroxyanisole, antioxidants, fermentation, drying, fermented foods, food packaging, vacuum packaging, aerobic conditions, food storage, cold storage, storage time, storage quality, meat quality, fatty acid composition, lipid peroxidation, oxidative stability, aldehydes, volatile organic compounds
Dry fermented sausages produced by a partial substitution of pork backfat with pre-emulsified olive oil were manufactured and stored (2 and 5 months) using different packaging conditions (aerobic/vacuum piece/vacuum slices) in order to evaluate the intensity of the oxidation process. Also the effect of the addition of butylhydroxytoluene (BHT) and butylhydroxyanisole (BHA) to one of the modified batches was studied. Addition of olive oil, especially with antioxidants, was more effective than using vacuum storing methods in avoiding lipid oxidation during storage. After 5 months of storage at 4 °C, the combination of the increase in oleic acid and the preservation of PUFA by the antioxidant activity of the olive oil emulsion and antioxidants (when added), lead to better MUFA + PUFA/SFA ratios in olive oil containing sausages (1.90-1.98 g/100 g fatty acids) and particularly in antioxidants containing sausages (2.02-2.16 g/100 g) than in control ones (1.72 g/100 g). Vacuum packaging of the piece was the best method to minimise formation of lipid oxidation volatile compounds.