Effect of substituted conjugated linoleic acid for fat on meat qualities, lipid oxidation and residual nitrite content in emulsion-type sausage

초록

An experiment was carried out to evaluate the effects of substituted conjugated linoleic acid (CLA) for fat on qualities, lipid oxidation and residual nitrite contents in emulsion-type sausage (ETS) after different periods of storage. The control sausage contained 20% fat, however, the substituted CLA for fat sausages contained 17.5% fat+2.5% CLA, 15% fat+5% CLA, 12.5% fat+7.5% CLA and 10% fat+ 10% CLA, respectively. CLA concentration was significantly increased (p < 0.05) by substitution of CLA sources for fat, and storage did not affect the CLA concentration. TBARS were significantly increased with the increasing of storage time in all treatments (p < 0.05). Significantly higher L* values were observed in the 10% CLA treatment compared to other treatments during storage. Moreover, a* values in CLA treatments significantly (p < 0.05) increased compared to the control. Again, b* values were significantly (p < 0.05) higher in CLA treatments than those of the control during storage. The concentration of residual nitrite in ETS was significantly (p < 0.05) different between the treatments during storage and the results were in the following order: control > 2.5% CLA > 5% CLA and 7.5% CLA > 10% CLA. Overall acceptability of CLA treatments was significantly (p < 0.05) lower than the control during storage, whereas no significant differences were found in overall acceptability between the treatments after 28 days of storage.

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