Sensory profile and technological characterization of boneless dry-cured ham with lactulose added as a prebiotic.

OBJECTIVE: This study investigates the technological and sensory profile of boneless dry-cured ham added with different contents of lactulose as a prebiotic ingredient. METHODS: In addition to the control samples (without the addition of lactulose), three treatments were formulated to contain 2, 4 or 6% lactulose. Technological (lactulose content, CIE color and texture profile analysis) and sensory (acceptance and check-all-that-applies tests) analyses were performed on the final product. RESULTS: The lactulose content in the finished product (1.86±0.23%, 3.16±0.18% and 2.51±1.35%) was lower than the lactulose originally added (2, 4 and 6% respectively). The addition of 4% and 6% lactulose made (P < 0.05) the products darker (lower L*) and redder (lower h) with higher hardness and chewiness values, when compared to control samples. The additions of 2% and 4% lactulose reduce the appearance acceptability of the products, but overall the treatments were well accepted. CONCLUSION: The use of up to 4% lactulose as a prebiotic in the production of boneless dry-cured hams provides an alternative to improving its nutritional value with little alteration in the technological characteristics and still meeting the sensory characteristics desired by consumers.

Effect of mechanically deboned poultry meat content on technological properties and sensory characteristics of lamb and mutton sausages.

OBJECTIVE: This study aimed to develop a value-added product concerning technological and sensory characteristics changes of the use of mechanically deboned poultry meat (MDPM) as meat replacer in lamb and mutton emulsion-type sausages (mortadella). METHODS: Sausages were produced with lamb and mutton and with different contents of MDPM. Six treatments, using lamb or mutton and 0%, 30%, and 60% of MDPM in relation to the meat batter, were produced and analyzed for pH, proximal composition, calcium and residual nitrite content, water activity, 2-thiobarbituric acid reactive substances (TBARS), instrumental color and texture profile. The sensory profile of the mortadella's was also evaluated by acceptance test and check-all-that-applies (CATA) analysis. RESULTS: The MDPM addition increased (p<0.05) fat, residual nitrite and calcium content in the all sausage formulations, but mutton sausage had (p<0.05) higher fat and lower moisture content than lamb sausage. The pH, water activity, TBARS index and color was not affected by MDPM additions, while the mutton sausages were significantly redder (higher a*, C*, and lower h°) and darker (lower L*) than lamb sausages. Adding up to 60% of MDPM reduced (p<0.05) sausages hardness and chewiness. Overall, the meat replacement by MDPM increased the sausages acceptance, but the mutton sausage with 30% of MDPM replacer were the most preferred. Consumers related that pink color, glossy appearance, poultry meat-like taste, soft texture, juicy and greasy mouth feel to all sausages contain MDPM according to CATA analysis. CONCLUSION: Mutton from culled ewes can be utilized for mortadella production with 30% replacement of lean mutton and fat by MDPM.

S-nitrosothiols as nitrite alternatives: Effects on residual nitrite, lipid oxidation, volatile profile, and cured color of restructured cooked ham.

This study evaluated the use of the S-nitrosothiols, S-nitroso-N-acetylcysteine (NAC-SNO) and S-nitroso-N-acetylcysteine ethyl ester (NACET-SNO), at different concentrations (25-300 mg nitrite equivalent - NEq/kg) as sodium nitrite substitutes in restructured cooked hams. The pH value and instrumental cured color were not affected by the type or amount of curing agent used. Products with 25 and 50 mg/kg ingoing nitrite had lower thiobarbituric acid-reactive substance values than those with equimolar amounts of S-nitrosothiols. Products with >150 mg NEq/kg of S-nitrosothiols had residual nitrite similar to 50 mg/kg nitrite, and this resulted in the same volatile compound profile as nitrite added in equimolar amounts. A 300 mg NEq/kg of S-nitrosothiols was required to obtain a similar and minimally stable cured pink color perception as sliced samples with 50-150 mg/kg added nitrite. The results obtained reinforce the great potential of both alternative curing agents in the complete replacement of nitrite by equimolar amounts in restructured cooked products; however, differences in cured color stability should be considered.

Freezing/thawing as an accelerating process of wet- and dry-aged Nellore beef.

This study aimed to evaluate the use of freezing/thawing as a way of accelerating the aging processes of beef from Nellore animals. Non-frozen (NF) or freezing/thawing (FT) strip loins were aged (for 14 and 28 days) using two systems: bone-in dry-aging (DA); boneless wet-aging (WA). FT-treated samples had greater weight losses (P < 0.05) during aging than NF-treated samples, especially using the DA process. However, the weight loss of the FT 14-days DA beef samples was comparable to that of NF 28-days DA. FT beef had lower fragmentation index and shear force values (P < 0.05), as well as its maximum sensorial tenderness was achieved earlier (P < 0.05) than the NF counterpart. With 28 days of aging, DA beef showed higher (P < 0.05) tenderness and juiciness scores and lower lightness values than WA beef. The FT process decreased the reducing capacity of meat samples, generating more metmyoglobin and lower amounts of chroma than NF. The expected volatile profile of DA beef was achieved faster in FT-treated samples, but the freezing treatments did not compromise the microbial count for either aging system. Our findings indicate that accelerated DA by the FT process could improve the palatability of Nellore beef, allowing the desired tenderness and flavor profile to be achieved in a shorter time, without increasing costs with weight losses or adversely affecting physicochemical, chemical, and microbial characteristics.

Technological and sensory characteristics in development of innovative symbiotic boneless dry-cured lamb meat snack.

Novel shelf-stable and high-protein meat products that are affordable, convenient, and healthy are hot topic in current food innovation trends. To offer technological databases for developing new functional lamb meat products, this study aimed to evaluate the technological and sensory aspects of dry-cured lamb meat snacks incorporated with the probiotic culture Lactobacillus paracasei and the prebiotic lactulose. Four formulations were analyzed: control (without prebiotic or probiotic); PREB (with 2% lactulose); PROB (with 107 CFU/g of L. paracasei); and SYMB (with 2% lactulose and 107 CFU/g of L. paracasei). Fitted curves revealed that weight-loss behavior during snack ripening was not affected (P > 0.05) by treatments. Snack moisture, water activity, pH, titratable acidity, lipid oxidation, and residual nitrite were affected (P < 0.05) only by ripening time. The target probiotic strain stood out against competitive flora and was detected at 107 CFU/g in the snack-supplemented formulations (PROB and SYMB). In snacks supplemented with prebiotics (PREB and SYMB), the lactulose content was maintained at 2.17%. Significant differences were not observed in the chemical composition, texture profiles, and CIE color indices between the proposed functional snacks and the control. In addition to texture, flavor, and overall impression evaluation, only color attributes were positively impacted (P < 0.05) in the acceptance and multiple comparison tests against the control. The proposed formulation and bench process parameters produced potential nutritionally and sensory-appreciated, microbiologically stable, and safe (multi-hurdle perspective) functional high-protein restructured lamb snacks.

Technological and sensory characteristics of hamburgers made with polyunsaturated gelled emulsions.

The quest for healthiness has driven the meat industry to seek solutions to reduce or replace saturated animal fat. The replacement (partial or total) of animal fat by polyunsaturated vegetable oils rich in omega fatty acids has gained prominence in terms of making a product healthier. However, an obstacle to this strategy is the effects on the sensory characteristics of the products, which may be unfavorable to consumers. The objective of this study was to evaluate the lipid reformulation of hamburgers through the total replacement of pork fat with canola, sunflower, and corn oil emulsions. The physical-chemical, technological, and sensory properties analyses were performed. There were no significant changes (P > 0.05) in moisture content, protein content, ash content, pH, weight loss (%), moisture retention (%), or shrinkage (%). However, the lipid content was reduced (P < 0.05) and there was a significant improvement in the fatty acid profile with the application of gelled emulsions. The lipid peroxidation and oxidation also increased (P < 0.05) for the samples with the addition of gelled emulsions, and we observed the same behavior for lipid retention (%). In the sensory evaluation, the samples showed good overall acceptance, with hedonic scores ranging from "like slightly" to "like very much." In addition, through check-all-that-apply questions, we observed that the most positive scores given applied to the treatments were applied to the emulsions. The total replacement of animal fat by gelled emulsions is a promising strategy for producing healthier hamburgers.

Assessment of Japanese radish derivatives as nitrite substitute on the physicochemical properties, sensorial profile, and consumer acceptability of restructured cooked hams.

This study aimed to evaluate the technological and sensory properties of restructured cooked hams prepared with natural curing agents (0.5% radish powder, HRP; 3% radish juice, HRJ; and 0.5% radish pulp powder, HRPP) and with 40 and 150 mg/kg sodium nitrite (HN40 and HN150, respectively). No difference was observed for pH, proximate composition, or cooking loss. Higher residual nitrite contents were observed in the HN150, followed by the radish derivatives hams and HN40. All radish derivatives hams had a similar hue (h) color to HN40, but the h values of HRJ also did not differ from the HN150 ones. The stability of the cured color was not affected. Consumers perceived a non-characteristic aroma and flavor in the radish derivatives hams, but the HRJ had the best acceptance scores. The HRJ appearance was similar to the HN150, and the other sensory attributes were like the HN40. The potential use of radish derivatives, especially radish juice, as natural curing agents was confirmed.

Application of gamma radiation in the beef texture development during accelerated aging.

This study aimed to evaluate the effects of gamma radiation (3 kGy) on the quality of post-rigor beef (M. longissimus lumborum) aged for up to 21 days at different temperatures (1, 7, and 15°C). Irradiation reduced the mesophilic and lactic acid bacteria counts, which were higher in the non-irradiated samples aged at 7 and 15°C. The water retention capacity was lower in the irradiated beef, resulting in higher values of exudation and cooking losses. High aging temperatures increased the exudation loss and myofibrillar proteolysis (lower fragmentation index; FI) and reduced the total and insoluble collagen contents and the beef Warner-Bratzler square Shear Force (WBsSF). However, irradiated beef had higher FI and SF than non-irradiated ones, increasing the time required for the beef tenderizing. Gamma irradiation (3 kGy) can be used to ensure the microbiological safety during short storage at high temperatures (up to 15°C) in order to accelerate the process of beef tenderizing.

Temporal dominance of sensations and check-all-that-apply analysis of restructured cooked hams elaborated with different salt content and pork quality meats.

This study aimed to evaluate the effects of salt (NaCl) content of 1.2%, 1.6%, and 2.0% in the sensory characteristics of restructured cooked hams, formulated with abnormal (PSE; pale, soft, and exudative) and normal (RFN; reddish pink, firm, and non-exudative) meats. The products with 1.2% added salt had higher (P < 0.05) acceptance scores for flavor, regardless of the type of meat used. Hams manufactured with PSE meat and 1.2% salt content had higher (P < 0.05) overall impression scores and were associated with the terms "characteristic ham flavor", "juicy", and "soft" in the check-all-that-apply analysis. RFN meat samples with 1.6% and 2.0% salt content were respectively associated to "rubbery" and "firm" texture. The ham flavor was always reported at the beginning of the temporal dominance of sensation test, followed by the term "salty" for the samples with 2.0% salt and "meaty" in the samples with 1.2% salt. The term "umami taste" appears to be associated to that samples made with PSE meat. These results led to the conclusion that PSE meat had a positive effect on the sensory profile of restructured cooked hams, especially in those formulated with 1.2% salt.

Effect of freezing/irradiation/thawing processes and subsequent aging on tenderness, color, and oxidative properties of beef.

This study evaluated the use of gamma irradiation (3, 6 and 9 kGy) in frozen vacuum-packed beef and subsequent thawing and aging for up to 14 days. The effects on tenderness, color, and oxidative properties were determined and compared to non-irradiated controls for frozen/thawed and chilled vacuum-packed beef. The combined irradiation and freezing/thawing processes increased total exudate loss and reduced the meat water-holding capacity, regardless of the dose used. Myofibrillar fragmentation was favored by the freezing/thawing processes and negatively affected by irradiation. Lower shear force values were observed in the non-irradiated frozen/thawed samples. Frozen samples irradiated at 9 kGy had a higher percentage of soluble collagen, lipid peroxidation, and a more reddish color tone. The meat reducing capacity and oxygen consumption were reduced by freezing and further by irradiation, which also included accumulation of metmyoglobin. It was concluded that irradiation of frozen meat and its subsequent thawing and aging does not confer any additional advantages for beef technological quality.

Combined effects of gamma irradiation and aging on tenderness and quality of beef from Nellore cattle.

Combined effects of gamma irradiation (0, 3, 6 and 9 kGy) and aging (1 and 14 days) on quality attributes of vacuum-packaged beef from Nellore cattle were evaluated. The meat water holding capacity was affected by irradiation, increasing (p < 0.05) purge and cooking loss regardless of the dose used. Irradiation negatively affected myofibrillar fragmentation, but samples irradiated at 9 kGy had (p < 0.05) higher soluble collagen and lower shear force values. The meat metmyoglobin reducing activity was reduced (p < 0.05) by the irradiation process, inducing the metmyoglobin accumulation with increasing dose applied. Samples irradiated at 9 kGy presented (p < 0.05) higher lipid oxidation and lower oxymyoglobin proportion and color redness and chroma values. It was concluded that irradiation at 9 kGy combined with aging can be used as an effective tool for improving the tenderness of Nellore beef, but resulted in a discoloration of the beef.

Effects of PSE meat and salt concentration on the technological and sensory characteristics of restructured cooked hams.

The effects of the use of normal and pale, soft, and exudative (PSE) meat on the technological and sensorial quality of restructured cooked hams elaborated with different salt contents (0.8, 1.2, 1.6, 2.0, and 2.4%) were investigated. A low salt content implied (P < .05) high cooking loss (6.27 vs 3.25%), expressive moisture and C* values and low hardness. Products elaborated with PSE meat had (P < .05) lower cohesiveness, energy to fracture and hue tone colour and higher springiness than did samples elaborated with normal meat. Salty taste perception was slightly higher for the PSE meat-based products, which were also preferred by the assessors when salt contents lower than 1.6% were used. It was concluded that when PSE meat was used, the addition of 1.2% salt was sufficient to maintain the technological and sensory characteristics of the restructured cooked hams.

Retail display of beef steaks coated with monolayer and bilayer chitosan-gelatin composites.

The effects of edible monolayer and bilayer chitosan-gelatin coatings on the weight loss, lipid oxidation, color preservation (display-life), and shelf-life of beef steaks during 10 days of retail display (at 4 °C; 12 h light/day) were evaluated. The edible coatings had a homogeneous crack-free surface, with the bilayer films being two times thicker than the monolayer coatings. During storage, the control samples had higher pH values and more weight loss (P < .05) than the coated ones. The coatings effectively retarded (P < .05) lipid oxidation and microbial growth (psychrotrophic bacteria, molds, and yeast), extending the shelf-life from 6 to 10 days. The coatings also significantly prevented metmyoglobin accumulation on the beef surface, as reflected in the maintenance of the CIE color indices and sensorial redness perception throughout storage. These effects were similar for both the monolayer and bilayer films, suggesting that chitosan-gelatin coatings could improve the shelf-life and display-life of beef during retail storage.

The effects of sodium chloride and PSE meat on restructured cured-smoked pork loin quality: A response surface methodology study.

The effects of the PSE meat proportion (0 to 100%) and sodium chloride contents (0 to 2%) on technological and saltiness of restructured cured-smoked pork loins were investigated by using response surface methodology (RSM). Lipid oxidation, pH values and reheating loss of the products were most affected by the proportion of PSE meat, while the salt concentration mainly affected the water activity, expressible moisture values, hardness, chewiness and sliceability of the products. Perception of the salt flavor increased with the addition of salt and proportion of PSE meat in the elaborated products, where the addition of 0.5% salt was considered as ideal by consumers. It was concluded that an amount close to 0.8% salt is required for satisfactory maintenance of the technological characteristics of the restructured cured-smoked pork loins, especially when PSE meat is used in the formulation.

Combined effects of gamma radiation doses and sodium nitrite content on the lipid oxidation and color of mortadella.

The effects of different doses of gamma radiation (0-20kGy) on the color and lipid oxidation of mortadella prepared with increasing nitrite levels (0-300ppm) were evaluated using a central composite rotatable design. Higher radiation doses increased the redox potential, promoted the lipid oxidation and elevating the hue color of the mortadellas. Nevertheless, higher addition of sodium nitrite elevated the residual nitrite content, reduced the lipid oxidation and promoted the increase of redness and the reduce of hue color of the mortadellas, regardless of the radiation dose applied. Nitrite addition had a greater effect than irradiation on the quality parameters evaluated, and even at low levels (∼75ppm), its use decreased the deleterious effects of irradiation at doses as high as 20kGy.

Effect of freezing prior to aging on myoglobin redox forms and CIE color of beef from Nellore and Aberdeen Angus cattle.

The objective of this study was to evaluate the effect of freezing prior to wet aging on the color of Nellore and Aberdeen Angus cattle meat. Samples of the Longissimus thoracis muscle were subjected to two treatments: conventional aging (0, 7, 14 and 21days); and freezing (-20°C for 40days) followed by thawing and aging. Freezing promoted (P<0.05) formation of metmyoglobin during aging, especially in Nellore beef. Frozen meats showed (P<0.05) lower lightness (L*) values and higher redness (a*), chroma (C*) and hue angle (h*) values at the first day of storage, deteriorating quickly with aging time. The color of the Nellore meat was less (P<0.05) stable to freezing, being lighter, yellower and less red than Angus meat. The results suggest that color stability in vacuum-packed beef is reduced by freezing prior to aging and that reduction depends on the animal breed.

Selection of a chitosan gelatin-based edible coating for color preservation of beef in retail display.

Chitosan gelatin-based coating films were applied to beef steaks, and their effects on color preservation and lipid oxidation during retail display were evaluated. Response surface methodology was used to model and describe the effects of different biopolymer concentrations (0 to 6% gelatin; 0.5 to 1.5% chitosan; and 0 to 12% glycerol based on dry gelatin+chitosan weight) in the coating film for optimizing the best combination for meat application. Film application reduced weight loss and lipid oxidation of the steaks after 5 days of storage, and films with higher gelatin concentrations were more effective. The percentage levels of different myoglobin-redox forms were not affected by coating, but myoglobin oxidation during retail display was reduced and the percentage of deoxymyoglobin increased with the gelatin content of the film. Steak color stability during retail display was promoted by film application; the steaks exhibited a darker, more intensely red color when coated in blends with higher gelatin and chitosan contents. Blends containing between 3% and 6% gelatin, between 0.5% and 1.0% chitosan and 6% glycerol exhibited the best results and provide a promising alternative to the preservation of beef in retail display.

Preservative of Essential Oil Blends: Control of Clostridium perfringens Type a in Mortadella

Abstract The aim of this study was to evaluate the antimicrobial effect of the essential oils of cinnamon, cardamom, clove, oregano, and thyme and their synergism on vegetative cells and endospores of Clostridium perfringens type A inoculated in meat sausage (mortadella), as well as the influence of blends on the color, and lipid oxidation through the determination of thiobarbituric acid reactive substances (TBARS index). The anticlostridial action of the oil blends was established. The two added oil blends (Treat. 1: oregano, clove, and thyme; Treat. 2: oregano, clove, and cinnamon) in combination with reduced nitrite content (75 ppm) promoted a lower growth of C. perfringens in mortadella stored at 15 °C for 21 days in comparison to treatments containing only 75 ppm of nitrite. The essential oil blends showed antioxidant action and did not alter food color, thus possessing potential application as a preservative for the meat products industry.

Application of a check-all-that-apply question for evaluating and characterizing meat products.

Four different mortadella samples were technologically characterized by physical/chemical and instrumental analyses and were sensorially characterized by acceptance testing and check-all-that-apply (CATA) questions. Samples were divided into three groups by using a principle component analysis (PCA) of the technological characteristics and by using an internal preference map (IPM) of the sensory attributes from the acceptance test. CATA divided these samples into four different external preference map (EPM) groups because each sample was associated with different sensory attributes. The PCA indicated that there was a relationship between the instrumental color and texture analyses and the CATA attributes, whereby identifying the terms that positively or negatively contributed to sample acceptance. The CATA questions effectively discriminated between the meat products regarding their sensory characteristics. In addition, these attributes were linked to chemical and instrumental quality parameters. Thus, the CATA questions are a potential tool for evaluating and developing novel products.

Acompanhamento de mudanças na cor de carnes a partir de imagens obtidas de smartphones: uma nova abordagem / Follow-up of changes in meat color from smartphones images: a new approach

Objetivou-se acompanhar as mudanças na cor de carnes durante o armazenamento refrigerado (0 a 3 dias a 7°C) utilizando imagens obtidas por um celular. Os índices de cor (CIELAB) foram registrados por um colorímetro e comparados aos índices obtidos a partir da proporção de cores da paleta oriunda da imagem de um celular (IMG = todas as cores; IMG2 = 2 cores em maior proporção; e IMG3 = 3 cores em maior proporção). O comportamento das mudanças de cor observada durante o armazenamento foi idêntico paras os índices obtidos do colorímetro e das imagens do celular. As imagens obtidas do colorímetro eram menos saturadas (menor C*) e com tonalidade menos avermelhada (maior h) do que as imagens obtidas do celular. O método IMG2 registrou cores visualmente mais próximas das observadas visualmente na superfície das carnes.