Physicochemical, Oxidative Stability and Sensory Properties of Frankfurter-Type Sausage as Influenced by the Addition of Carrot (Daucus carota) Paste

This study examined the addition of carrot paste (CP) at levels of 3%, 5%, and 10% as a potential antioxidant in frankfurter-type sausages, denoted as F1, F2, and F3. F0, was a control sample with no addition of CP. All formulated samples were stored for 14 days during which their physicochemical, oxidative stability, and sensory properties were evaluated. Results showed that the pH of frankfurter-type sausages was not affected by the addition of CP, however, higher pH values were observed in CP-enriched samples on the first day of production and subsequent storage days. Cooking loss (CL) in frankfurter-type sausages was in the range of 2.20% to 2.87%, with the CP-enriched samples having a lower CL percentage, particularly F3 samples, compared to the control. Protein and fat content were lower in CP-enriched samples, but ash content increased. CP-enriched frankfurter-type sausages recorded significantly higher polyphenol contents compared to the control. Total polyphenol content in CP-enriched samples F1, F2, and F3 was higher throughout storage compared to the control. Lower peroxide values were also recorded in CP-enriched samples F1 (2.5 meq/kg), F2 (2.4 meq/kg), and F3 (2.2 meq/kg) compared to the control (2.9 meq/kg), demonstrating greater 2,2-Diphenyl-1-picrylhydrazyl (DPPH) antioxidant activity than the control samples. Formulations treated with 10% CP gained significantly higher scores for color, texture, and overall acceptability. Principal component analysis showed that higher inclusion levels of CP in formulation improved the sensory quality and oxidative stability. In conclusion, CP could be used to enhance the oxidative stability of frankfurter-type sausage without negatively influencing the sensory quality.

Evaluation of chicken nugget properties using spent hen meat added with milk fat and potato mash at different levels

This study was aimed to develop chicken nuggets using spent hen meat (SHM) added with milk fat (MF) and potato mash (PM) at different levels. Four different spent hen nuggets (SHNs) i.e. T1 (75% SHM with 5% MF), T2 (70% SHM with 8% MF and 2% PM), T3 (65% SHM with 11% MF and 4% PM), and T4 (60% SHM with 14% MF and 6% PM) were formulated and compared with the control, using broiler chicken meat without MF and PM. The control, T1, and T2 were not significantly different with respect to protein and fat contents. The emulsion stability (92.2%), frying yield (84.1%), hardness (19.2 N) and chewiness (11.4 N) of T2 were similar to the control. The incorporation of MF and PM resulted in increased taste and flavor scores for SHN. The overall acceptability score was same for the control and T2. The conjugated dienes and thiobarbituric acid-reactive substance results showed that the addition of MF at 8 to 10% did not have an effect on the oxidative stability of SHN during storage. MF-incorporated SHN may be a regular chicken nugget for all consumers due to improved texture and sensory quality with similar fat content to the control.

Volatile and nonvolatile taste compounds and their correlation with umami and flavor characteristics of chicken nuggets added with milkfat and potato mash

This study investigated the chemical compounds and umami characteristics of chicken nuggets using spent meat (SM) enriched with milkfat (MF) and potato mash (PM). Four different spent nuggets (SNs) i.e. T1 (75% SM, 5% MF), T2 (70% SM, 8% MF, 2% PM), T3 (65% SM, 11% MF, 4% PM), and T4 (60% SM, 14% MF, 6% PM) were developed and compared with control using broiler chicken muscles (without MF and PM). Most abundant volatiles were trimethyldodecane, camphene, 5-ethyl-2,2,3-trimethylheptane, 3,6-dimethylundecane, 2,2,4-trimethylheptane, and α-pinene, and their intensities were highest for T2. Umami-taste characteristics were better explained by partial least squares regression (PLS-R) than other taste variables assessed by electronic tongue. T2 and T3 had higher 5'-nucleotides (GMP, AMP, ADP) and umami-taste amino acids (aspartic and glutamic acids) resulting in increased equivalent umami concentration than the control, T1, and T4. This study may be useful for the egg industries to utilize spent hens.

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

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.

Novel trends in development of dietary fiber rich meat products-a critical review

Meat and meat products are generally recognized as good sources of high biological value proteins, fat-soluble vitamins, minerals, trace elements and bioactive compounds. Changes in socioeconomic factors in recent years have increased the consumer's preference for ready to eat foods including meat products. The processing of meat and meat products leads to generation of many functional compounds beneficial to human health but most of those foods are rich in fat, added salts but deficient in complex carbohydrates like dietary fiber and pose a health hazard that somehow is proved to be a predisposing factor for cardiovascular diseases, colon cancer, obesity including diabetes mellitus. With increasing consciousness among consumers about their nutrition and well being, there is a growing concern over nutritional diseases of affluence. Therefore an increase in dietary fiber inclusion in daily diet has been recommended. For adults, the recommended acceptable intakes of dietary fiber are 28-36 g/day, 70-80 % of which must be insoluble fiber. The insoluble fraction of dietary fiber has been related to intestinal regulation whereas soluble fiber is associated with decrease in cholesterol level and absorption of intestinal glucose. So incorporation of dietary fibers from different sources in meat products would help to enhance their desirability. Dietary fiber sources are generally agricultural byproducts that are comparatively cheap and incorporation in meat products reduces its overall cost. Whole grains and cereal brans are the rich source of insoluble fiber and pectins, gums, starch and other storage polysaccharides have high content of the soluble fraction. With this background, the effect of various dietary fibers on the quality attributes of meat and meat products with its physiological role has been reviewed here.