Métodos de conservação da costela suína

Abstract

Pork rib is a minimally processed product since it is a kind of meat that has only been cut and immediately packed and refrigerated. It has a short shelf-life, which is determined mainly for the microbiological deterioration. Having the objective of verifying the efficiency (antimicrobiotic and antioxidant action) of preservation methods applied associated to the shelf-life of pork ribs, the latter were bathed in the following solutions: Minerat B® solution (market product) in 10% = T1, organic acid mixed solution (1% lactic acid, 1% citric acid, 1% acetic acid and 0,8% ascorbic acid) = T2, lactic acid solution in 1,25% = T3, acid solution of sodium cloret (0,6% of citric acidand 0,1% of NaCl) = T4. One of the samples had no bathed solution and it was considered as controll = C. Afterwards, the samples were stored in packages that contained modified atmosphere (CO2 69,93% + N2 29,57% + CO 0,5%) in these proportions: 2:1 (gas:meat), in the first test and 3:1 in the second one, and stored under 5°C (± 1°C), considering that in the first test the samples remained, inicially, under 1°C (± 1°C) for one week. Mesophile aerobic microorganisms, psychrotrophy and lactic bacteria counting, pH and TBA index determination and sensorial anlysis were made. In the first test, the T2 treatment obtained a better performance while reducing the microbiological growth and also greater durability (between 21 and 24 days) but in the second test, the greatest antimicrobiotic effect was achieved by T3, however, T4 had greater durability (19 days). In terms of TBA index, all results were below the minimum limit for the showing of undesirable characteristics. Sensorially, in the first test, among the raw samples, T4 had greater acceptability, and among the roasted it was T3. In the second test, among the raw samples, T2 obtained the best color and T4 had the best odor, and among the roasted it was T2. The samples acquired a bright cherry red color that remained throughout and after the end of the analyses, not showing indication of deterioration, even after its occurence. According to the results, one can say that the treatments that were used (modified atmosphere + antimicrobiotic bath) have shown to be efficient in the preservation of refrigerated pork ribs, even under different degrees, and do not interfeer negatively in their sensorial characteristics.