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http://dx.doi.org/10.5187/jast.2020.62.5.702

Effects of partial substitution of nitrites with purple-fleshed sweet potato powder on physicochemical characteristics of sausages  

Jin, Sang-Keun (Department of Animal Resources Technology, Gyeongnam National University of Science and Technology)
Shin, Teak-Soon (Department of Animal Science, Pusan National University)
Yim, Dong-Gyun (Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University)
Publication Information
Journal of Animal Science and Technology / v.62, no.5, 2020 , pp. 702-712 More about this Journal
Abstract
Synthetic nitrite imparts a reddish-pink color to meat and a distinct flavor to meat products, delays lipid oxidation, and inhibits microbial growth and pathogens. However, excessive intake of nitrite might result in the production of carcinogenic nitrosamine, which might increase the risk of cancer in humans. Therefore, we aimed to find an alternative natural colorant for pork sausages. Pork sausages were mixed with 0.014% sodium nitrite (NaNO2) alone (CON), without either NaNO2 or purple-fleshed sweet potato powder (PP; CON1), 0.5% PP alone (PP1), 1% PP (PP2) alone, 0.011% NaNO2 and 0.5% PP (SP1), and 0.011% NaNO2 and 1% PP (SP2). The sausages were then cooked and stored for physicochemical analysis on days 0, 5, 10, 15, and 20. The a* and W* values were the greatest and lowest in the SP2 and CON1 treatments, respectively (p < 0.05). The concentrations of residual nitrite in the sausages at 20 days decreased in the order of CON > SP1, SP2 > PP2 > PP1, CON1. The fatty acid content was higher, and flavorous amino acids were more in PP2 (p < 0.05). The fatty acid composition was comparable between the SP2 and CON groups, but the contents of glutamic acid and alanine were greater in the SP2 group. In conclusion, SP2 (0.011% NaNO2 with 1% PP) could be added as a natural colorant for pork sausage production, and NaNO2 could be substituted with up to 20% PP without detrimental effects on sausage appearance and/or quality.
Keywords
Purple sweet potato; Sausage; Nitrite; Physicochemical characteristic;
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Times Cited By KSCI : 6  (Citation Analysis)
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