Tenderness Of Breast Meat Research Articles

Analysing the Impact of Spirulina Intake Levels on Performance Parameters, Blood Health Markers and Carcass Traits of Broiler Chickens.

This systematic review examines the impact of varying Spirulina (Limnospira platensis) intake levels on broiler chickens, focusing on growth performance, blood health markers and carcass traits. The data revealed cumulative Spirulina intakes from 3.13 g to 521 g per bird (total feed consumed multiplied by its proportion in the diet) establish a cubic relationship between dosage and growth outcomes. Initial benefits peak and diminish with increased intake, with the optimal threshold for growth performance identified at 45 g per bird. Lower intakes between 14 g and 29 g per bird enhance blood health markers, improving lipid profiles and antioxidant capacity. Similarly, cumulative intakes of 14 g to 37 g per bird optimise meat quality, resulting in better dressing percentages, breast and thigh yields and meat tenderness while minimizing undesirable traits like abdominal fat and cooking loss. These findings underscore the importance of precisely calibrated Spirulina supplementation strategies to maximise growth, health and meat quality benefits while avoiding adverse effects at higher doses. Future research should focus on identifying optimal dosage and duration, assessing long-term implications, elucidating mechanisms of action and ensuring safety and regulatory compliance. Comparative studies with other feed additives could further establish Spirulina's effectiveness and economic viability in poultry production.

Effect of dietary methionine to crude protein ratio on performance of Ross 308 broiler chickens aged 22 to 42 days

An experiment was conducted to determine the effect of dietary methionine to crude protein (CP) ratio on the performance of male Ross 308 broiler chickens aged 22 to 42 days. The diets were isocaloric and isonitrogenous but with different methionine-to-CP ratios. The diets, based on methionine to crude protein ratios, were M0.020 (0.020), M0.025 (0.025) M0.030 (0.030), M0.040 (0.040), or M0.045 (0.045). A complete randomized design was used. A quadratic type of equation was used to determine dietary methionine to CP ratios for optimal performance of the chickens. Dietary methionine to CP ratio had no effect (P > 0.05) on feed intake, live weight gain, live weight, feed efficiency, metabolizable energy intake, nitrogen retention, abdominal fat pad weight, breast meat nitrogen and methionine contents, and meat flavour and shear force values of the chickens, but it affected (P < 0.05) CP digestibility, carcass and breast weights, and breast meat tenderness and juiciness. Methionine to CP ratios of 0.039, 0.038, 0.050, and 0.050 were calculated to result in optimal CP digestibility, carcass weight, breast meat tenderness, and juiciness, respectively. These results may imply that dietary methionine to CP ratio requirements for broiler chickens will depend on the production parameter of interest.

Effect of Different Frying Methods on Cooking Yield, Tenderness and Sensory Properties of Chicken Breast Meat

This paper focused on the effect of different frying methods on the quality of chicken breast meat. Fresh boned broiler chicken breast meat samples were purchased, frozen, sliced into dimensions. These samples were cooked by air frying (AF) and deep fat frying (DF) methods at 170°C, 180°C and 190°C for 4, 8, 12- and 16-min. Cooking yield and loss were assessed by weight changes before and after frying and tenderness changes were determined by measuring the compression force using instrumental texture profile analysis (TPA). The sensory acceptance and preferences were conducted on the samples by panel of judges. Cooking yield of fried chicken breast meat decreased significantly (p &lt; 0.05) with increasing frying temperature and time. Air fried (AF) samples had higher mean cooking yield value of 59.26 % than DF method sample of 50.00%. Samples fried at lower frying times had significantly (p &lt; 0.05) higher cooking yield compared with longer frying times. Cooking loss increased significantly (p &lt; 0.05) with increasing frying temperature and time. Samples fried with hot air adopting AF method had lower average cooking loss (40.20%), fat content (6.62 %) and higher compression force (hardness) value (12.39 kg/F) than samples fried by DF method which had higher cooking loss (49.47 %) and lower compression force or hardness (12.18 kg/F) and higher fat content (11.88 %). Samples fried for 4 min had significantly (p &lt; 0.05) the least value in cooking loss and tenderness, but 8 min fried samples had better sensory attributes than 4 min fried samples, which were pinkish colour in appearance and unappetizing to consumers. Air frying method with the best tenderness value (20.43 ± 1.15 Kg/F), while deep fat frying method-produced samples with its best tenderness value (18.89 ± 0.70 Kg/ F) at 170°C for 16 min. Sensory evaluation showed that DF products were moderately crispy (7.19) compared to AF products, which were slightly crispy (5.45). The interaction effect of frying method, frying temperature and frying time was significant for cooking yield, loss and tenderness. However, the overall interaction (frying method x frying temperature x frying time) was found to be significant in coking yield and loss, but not significant in tenderness.

Calcium supplementation in low nutrient density diet for meat ducks improves breast meat tenderness associated with myocyte apoptosis and proteolytic changes.

To define the relationship between dietary nutrient density, calcium (Ca), and meat quality in meat ducks. A total of 288 male Cherry Valley SM3 medium ducklings were fed a common standard starter diet until d 14. At 15 d of age, ducks were randomly divided into 2 treatment groups and fed either a conventional diet or a low nutrient density (LND) diet. Compared with the conventional diet, the energy was reduced in the LND diet by 8.6% and 16.8% in grower (15 to 35 d) and finisher (36 to 56 d) phases, respectively, while other essential nutrients were kept proportionate to energy. The LND diet decreased the shear force (P < 0.05) and increased the lightness values of the pectoralis muscle when compared to the conventional diet, suggesting that LND diet exerted a beneficial role in meat quality. Subsequently, the effects of grated Ca in the LND diet on meat quality of pectoralis muscle were evaluated. A total of 576 male ducklings were fed a common starter diet until d 14, followed by feeding 4 LND diets with 0.5%, 0.7%, 0.9%, and 1.1% Ca. The results show that LND diets with 0.7% or more Ca decreased the shear force of pectoralis major muscle in 42-d-old meat ducks (P < 0.05). To explore the mechanism underlying Ca and tenderness, data from birds fed either 0.5% or 1.1% Ca in the LND diet indicated that birds fed 1.1% Ca exhibited lower shear force, upregulated calpains 1 expression, and higher calpains activity compared to those fed the LND diet with 0.5% Ca (P < 0.05). Moreover, the 1.1% Ca LND diet induced a higher myocyte apoptosis (P = 0.06) and upregulated mRNA expression of caspase-3 (P = 0.07) in breast muscle. Our data suggest that LND diets with 0.9% or 1.1% Ca had a positive role in the tenderness of breast meat, particularly the enhancing effect of 1.1% Ca LND diet on tenderness seems to be associated with proteolytic changes of myofibrillar proteins and myocyte apoptosis in meat ducks.

Comparative Growth Performance, Carcass Characteristics and Meat Quality of Local Horro and Exotic Cockerels of Tropical Origin Fed Growers Diet

Growth performance, carcass characteristics and meat quality of male chickens were evaluated using eight-week-old 360 cockerels from three exotic (Koekoek, Kuroiler and Sasso-R) and one Ethiopian indigenous (Horro) genotypes. Cockerels in each breed (90) were randomly allocated into three replications of 30 birds each and housed in deep litter pens for the experiment that lasted for 8 to 16 weeks. The experiment was arranged in a Completely Randomized Design. Seven birds per breed were slaughtered at the end to determine carcass yield, chemical composition and quality attributes of meat. The Kuroiler breed has higher body weight, body weight change (1621.8 g), average daily gain (28.9 g/day), daily feed consumption (127.4 g/day) and better feed conversion ratio (4.40) than other breeds. The Kuroiler breed has heavier slaughter weight (2716.3 g), dressed carcass weight (2201.0 g), eviscerated carcass weight (1905.1 g), breast weight (537.7 g), thigh weight (303.1 g) and drumstick weight (274.8 g) than other breeds. Total edible offal was higher for Kuroiler (324.2 g) and Sasso-R (306.1 g), intermediate in Koekoek (204.4 g) and low in Horro (152.4 g) breed. The relative proportion of breast and drumstick (% slaughter weight) were lower in Koekoek and Sasso-R (17.3 and 8.9) breeds, respectively. Abdominal fat weight (13.7 g and 1.02%) was lowest in Horro. Sasso-R showed higher percent edible offal weight (13.4%) than Horro breed (11.4%). The DM content in breast and thigh meat was higher for Horro breed than the rest. The CP content in the breast and thigh meat was lower for the Kuroiler and Koekoek breeds, respectively. Higher EE in the thigh meat was recorded for Sasso-R (8.9%), whereas, EE content in the breast meat was similar (3.4% - 3.7%) among the breeds. Flavor, tenderness, juiciness and general acceptability of breast and thigh meat were not affected by breed. The highest net return was observed in the Kuroiler breed. Based on the results obtained, it is suggested that the Kuroiler breed can be used for cockerel meat production in Ethiopia where intensive broiler production is not well developed.

Effect of Imbrasia belina meal on growth performance, quality characteristics and sensory attributes of broiler chicken meat

The study aimed to evaluate the effect of dietary graded levels of Imbrasia belina at 0%, 4%, 8% and 12% of broiler diets on meat quality and sensory attributes. A total of 360 one-day-old broiler chicks, were fed graded I. belina diets and slaughtered on day 35. Body weight (BW), Average Daily Gain (ADG), Feed Intake (FI) and Feed Conversion Ratio (FCR) were recorded. Breast muscles were evaluated for ultimate pH, meat colour (L* (lightness), a*(redness), b*(yellowness), tenderness, cooking loss. Forty consumer panellists evaluated sensory attributes. On day 28, the ADG in birds fed IB4 (88.06 g) and control (80.09 g) were statistically similar. On day 28 and 35 FI of broiler chickens fed control (147.47 g; 178.45 g) was the highest. The highest values for L* were observed in IB1, but not significantly different (p > .05) from IB3 and IB4. For redness, a* values were highest in IB3 and lowest in IB1. Lightness, yellowness, pH24 and Hue showed a quadratic response to increasing levels of IB meal. The shear force values were highest in IB1 (11.27), but not significantly different (p > .05) from IB3 (9.97) and IB4 (9.85). However, the tenderness scores were observed to be highest from IB3 (7.00). The highest acceptability scores of the breast meat were from IB2 (7.65). In conclusion, adding graded levels of I. belina meal up to 12% into diets of broilers had a positive effect on growth performance, meat quality and sensory attributes. Highlights Dietary inclusion levels of I. belina meal increased body weight gains in dietary treatment groups. The shear force in all dietary treatment groups decreased compared to the control. The tenderness of breast meat was found to be significantly influenced by the dietary treatment

Carcass traits, meat quality, and sensory attributes of fast-growing broilers given outdoor access at different ages

This study evaluated the effect of outdoor access offered to fast-growing broilers at different ages and its impact on meat quality attributes. A total of 200 straight-run broilers were arranged according to the completed randomized design and distributed into 4 treatment groups. The treatments were replicated 5 times; each replicate consisted of 10 birds. The treatment included age at exposure to outdoor access including day 21, day 28, and day 35, and a control group in which the birds were reared at an indoor facility for up to 56 days. Taste, flavor, juiciness, and overall acceptability of breast meat were highest for broilers given outdoor access on day 21 followed by day 28, day 21 and lowest for broilers without outdoor access. Tenderness of breast meat was highest in broilers without outdoor access followed by broilers given outdoor access on day 35 and day28 and lowest for broilers given outdoor access on day 21 of age. It can be concluded that giving outdoor access to fast-growing broilers at the age of day 21 improves carcass and meat quality traits.

Determination of the Effect of Some Acidic Solutions on the Tenderness and Quality Properties of Chicken Breast Meat

In this study, it was aimed to determine the quality characteristics of chicken breasts treated with different ratios of acetic acid and apple cider vinegar solu-tions. Chicken breasts were allowed to marinate for 48 hours at 4°C using solutions containing apple cider vinegar prepared with concentrations in 50% (E1) and 100% (E2) concentrations and 0.1 M (A1) and 0.2 M (A2) acetic acid. Pure water was used for the control group (C). Texture profile analyzes and Meullenet-Owens Razor Shear (MORS) analysis with pH, color ( L* , a* , b* ), cooking loss, water holding capacity and marinade absorption were applied to each treatment group. According to the results of the analysis, it was determined that the pH value of chicken breast meat samples marinated with apple cider vinegar was lower than the other groups. It was determined that the lowest hardness value was in E2 group according to the results of the texture profile analysis. According to the MORS analysis, the lowest shear force was found in E2 group. It is observed that the shear force has the lowest value in group including 100% apple cider vinegar in parallel to the hardness value. As a result, it was observed that apple cider vinegar had a very good source to increase tenderness of chicken breasts compared to acetic acid.

Influence of feeding colored wheat varieties on selected quality parameters of broiler chicken”™s meat

The effect of feeding colored wheat varieties (PS Karkulka and Skorpion) on chicken´s performance and texture, color and sensory characteristics of broiler chicken´s meat were evaluated in this study. The experiment was performed with 66 of Ross 308 cockerels. Cockerels were divided into three equal groups. The two experimental groups received feed mixtures containing 40% of wheats with different grain colour: groups PS Karkulka (n = 22) with PS Karkulka wheat cultivar and Skorpion (n = 22) with Skorpion cultivar. The third group (n = 22) had 40% of common wheat Vánek cultivar (Control). The live weight of broilers between all three groups was not significant different, as well as carcass yield and chemical composition of breast and thigh meat of chickens. In the parameter Razor Shear Force was found statistically significant higher breast meat tenderness in PS Karkulka against Control and Skorpion groups. In parameters L* and b* of colour of the meat samples was found statistically significant higher value in L* parameter in Skorpion group and b* parameter was higher in Control group. The total colour change was 2.25 and 2.53 for PS Karkulka and Skorpion group, respectively. In sensory analysis of broilers breast muscle was found statistically significant differences in odour, colour, fibreness, chewiness, juiciness and flavour parameter. The fatty taste parameter was non-significant. The odour parameter of chicken´s breast muscle was significantly lower in Skorpion group against PS Karkulka and Control groups. The significantly most intense colour of breast muscle was found in Control group versus Skorpion and PS Karkulka groups (91.71 mm, 79.71 mm and 71.15 mm, respectively). The fibreness parameter was significantly higher for Control group, as well. Significantly higher chewiness of breast meat was in Control (68.49 mm) than PS Karkulka (52.02 mm) and Skorpion (43.32 mm) group. The feeding of wheat cultivars with different grain pigmentation had no effect on performance parameters of broiler chicken´s as well as to it´s body and chemical composition of breast and thigh meat in this study.

Effect of Bay Laurel (Laurus nobilis L.) Leaf Powder Dietary Supplementation on Dressing Percent, Carcass Traits, Carcass Cuts and Some Internal Organs of Quail

Background/Objective: Bay laurel (Laurus nobilis L.) leaf can be used in poultry nutrition to increase gastric fluids to stop digestive disorders; it has antifungal, antibacterial potentials. The leaves had many effective substances including Apigenin, Luteolin, Kaempferol, Myricetin, cinole, eugenol, terpenol, Glycosides, ،Quercitin, linalool, Alkaloids, mthyl eugenol andlactonol. Methods: This study was conducted to measure the Effect of bay laurel (Laurus nobilis L.) leaf powder dietary supplementation on dressing percents, carcass trait , carcass cuts and some internal organs of meat type quail by 0, 1. 2,3% to the diets fed to 180 seven days old meat type quail randomly distributed to four treatments with three replicates for each treatment (15 bird /replicate). Findings: the bay laurel (Laurus nobilis L.) leaf powder dietary supplementation significantly by increased live body weight, carcass weight, dressing percent, and percentage weights of breast, drumstick, and thigh cuts. Adding bay laurel leaf powder improves taste, tenderness, and total acceptance of breast meat. Improvements: all experimental diets (of bay laurel (Laurus nobilis L.) leaf powder dietary supplementation) resulted in good dressing percents, carcass trait , carcass cuts in quail meat, indicating that this feed supplement should be used on industrial scale. Keywords: Bay Laurel Leaf, Carcass, Cuts, Dressing Percents, Quail

Optimization of goose breast meat tenderness by rapid ultrasound treatment using response surface methodology and artificial neural network.

The aim of this study was to develop a prediction model on tenderization of goose breast meat by response surface methodology (RSM) and artificial neural network (ANN). The experiments were operated on the basis of a three-level, three-variable (ultrasound power, ultrasound time, and storage time) Box-Behnken experimental design. Under RSM and ANN optimum conditions, experimental Meullenet-Owens razor shear (MORS) of meat (1862.6g and 1869.9g) was in reasonable agreement with predicted one. Nevertheless, better prediction capability of ANN was proved by higher R2 (0.996) and lower absolute average deviation=4.257) compared to those for RSM (0.852 and 16.534), respectively. These results revealed that ANN was more accurate and much better than RSM model for the optimization of tenderness of meat. The optimum conditions of ultrasound power, ultrasound time, and storage time given by ANN were 812W, 24.5min and 25.7hr, respectively. Under the optimized condition, the cooking loss of meat significantly decreased by ultrasound treatment compared with untreated meat. Lower cooking loss and MORS at the optimal condition were beneficial to meet the satisfaction of consumer and producers for meat factory.

The effect of feeding wheat varieties with different grain pigmentation on growth performance, texture, colour and meat sensory traits of broiler chickens

The feeding effect of of three spring wheat genotypes (Vánek, Konini and UC66049) with different grain colour on growth performance, body composition and meat quality parameters of broiler chickens was tested. Ninety chickens were divided into three groups (control, Konini and UC) with 30 chickens in each. The tested genotypes were compares with standard variety Vánek (control) with common (red) grain colour. The two experimental groups received feed mixtures containing 38.2% of wheats with different grain colour: groups Konini (n = 30) and UC (n = 30) with. The third group (n = 30) had 38.2% of common wheat Vánek cultivar (Control group). The live weight of chickens between the experimental groups and control group was not significant different, as well as body composition and chemical analysis of breast and thigh meat of chickens. The feeding of wheat with different grain colour had no effect on performance parameters of broiler chickens. Breast meat tenderness according to the Razor Blade Shear Force was higher in control group against experimental groups. The colour change was not significantly different in all coordinates. pH values (measured after 1-hour post mortem) were found significantly higher in the group fattening with Konini wheat than control and UC groups. Chickens meat from the experimental group was characterised by steady overall quality. The effect of various feeding had no effect on meat quality in terms of relevance to consumers.

Physical and chemical characteristics of spent hen breast meat aged for 7 days

Consumption of poultry meat is increasing worldwide. However, little is known about the consumption and acceptability of meat from older hens and about the physical and chemical characteristics of this type of meat. This study evaluated the effect of broiler age and aging time on the physical properties, tenderness, chemical composition, and lipid profile of breast meat from broilers slaughtered at 6 (commercial age) and 70 weeks of age (broiler hens). The variables analysed were: colour, pH, water-holding capacity, cooking weight loss, shear force, total collagen, myofibrillar fragmentation index, chemical composition, total cholesterol, lipid oxidation, and fatty acid profile. Compared with commercial broilers, meat from broiler hens had higher shear force (from 33.45 N to 14.91 N after 3 days of aging), higher fat content, and lower cholesterol concentration. Additionally, it had more monounsaturated fatty acids and less polyunsaturated fatty acids than meat from commercial broilers. Collagen, fat, cholesterol levels and myofibrillar fragmentation index decreased with aging. The use of broiler hen meat as a raw material may be beneficial to the poultry industry because it has more fat and less cholesterol, higher intracellular water-holding capacity, and lower cooking loss than meat from commercial broilers. Moreover, because of the lower concentration of polyunsaturated fatty acids, broiler hen meat is less susceptible to lipid oxidation. Aging breast fillets for 3 days at 2°C is sufficient to tenderise the meat and reduce the amount of fat and cholesterol, suggesting that aging can be used as a technique to add value to poultry meat products.

Effect of feeding different levels of palm kernel cake fermented by Paenibacillus polymyxa ATCC 842 on broiler growth performance, blood biochemistry, carcass characteristics, and meat quality

A feeding trial was conducted to investigate the effect of palm kernel cake fermented by Paenibacillus polymyxa ATCC 842 (FPKC) on broiler performance. A total of 245 1-day-old broiler chicks (Cobb 500) were raised in the conventional open-sided house. The birds were fed diets containing 0 (Control), 5%, 10% and 15% palm kernel cake (PKC) and 5%, 10%, 15% FPKC. The bodyweight and the feed intake were recorded. The bodyweight gain (BWG) and feed conversion ratio (FCR) were calculated. Carcass characteristics and meat quality were measured at the end of the experiment, whereas blood was collected at 21 (starter) and 42 days (finisher) to determine blood biochemistry. The results showed that the addition of 10% or 15% PKC in broiler diets led to a significant (P &lt; 0.05) decrease in BWG and increase in FCR during the finisher phase or overall performance. However, BWG and FCR were improved (P &lt; 0.05) in chickens fed with 10% or 15% FPKC compared with those fed with 10% or 15% PKC or the Control group. The relative weight of the gizzard was higher (P &lt; 0.05) for the broiler group fed with 15% PKC compared with those birds fed the Control diet or FPKC at 3 weeks of age. No significant differences were observed among the dietary treatments in blood biochemistry, breast meat colour, drip loss, cooking loss and tenderness. In conclusion, the present experiment showed that palm kernel cake fermented by P. polymyxa ATCC 842 could be fed to broiler chickens up to 15% in their rations without any adverse effect on the growth performance and meat quality.

The effect of feeding milk thistle seed cakes on quality indicators of broiler chickens meat

This study was conducted to evaluate the effect of feeding milk thistle (Silybum marianum L.) seed cakes at dose 5% and 15% in feed mixture on quality indicators of broiler chickens meat. The used milk thistle seed cakes contained 3.73% of flavonolignans and 129.83 mg.kg-1 of cyanidin-3-glucoside. A 150 cockerels of Ross 308 were divided into three equal groups. The chickens were fattened on conventional deep litter system. The experimental groups received feed mixtures containing 5% of milk thistle seed cakes (MT5), 15% of milk thistle seed cakes (MT15) and third group was control - without milk thistle seed cakes (C). The trial lasted 37 days. At the end of trial was observed significant higher average weight of chickens (2,320.31 g) in control group. Compare to that the experimental group MT5 achieved significant lower mean bodyweight 2,166.69 g. From the perspective of fattening was decreased growth of chickens where a higher percentage of milk thistle seed cakes (MT15). The group MT15 was up to 420 g lower slaughter weight compared to the control group. This was probably due to the higher content of fiber in the feed. At the end of experiment 15 birds were selected randomly from each group, weighed and slaughtered. Feathers were removed and chickens were eviscerated. Carcass yield was calculated for each group like as percentage of live weight. The MT5 and MT15 group had significantly higher breast meat tenderness that the control group. Initial pH1 was highest in group with its middle addition of milk thistle seed cakes (MT5). Significant differences were not observed between control and group MT15. Breast meat was rated as the best in parameter flavour in control and MT15 group. The thigh meat was evaluated significantly best for colour parameter in MT15 group. Fibreness was rated as the finest in MT15 group. The addition of milk thistle seed cakes do not worsened sensory characteristic of breast or thigh meat of broilers and reflects optimal sensory quality traits.

Effects of different cooking regimes on the microstructure and tenderness of duck breast muscle

Cooking has a great influence on meat tenderness, and we assumed that changes of tenderness in this process resulted from the liberation of actin and associated structural changes. Therefore, in this study, we investigated changes in the microstructure and tenderness when duck breast muscle were cooked to different internal endpoint temperatures (70, 80, 90, 95 °C) by three cooking regimes (conventional cooking, two-stage cooking and three-stage cooking). When duck breast muscle was cooked to an internal endpoint temperature of 70 °C, the three-stage cooking significantly decreased the Meullenet-Owens razor shear force (MORSF) value (P<0.05) and resulted in a longer sarcomere length (P<0.05) compared with the conventional cooking. However, further improvement of the tenderness and an increase in sarcomere length did not occur at higher internal endpoint temperatures. The two-stage cooking regime, with a much longer cooking time below 55 °C, also resulted in a lower MORSF value (P>0.05) and increased sarcomere length (P<0.05) at an internal endpoint temperature of 70 °C compared with the conventional cooking. Significant liberation of actin was also observed in duck meat cooked between 50 and 60 °C. The two- and three-stage cooking regimes with initial temperatures of 50-60 °C and endpoint temperature of 70 °C could improve tenderness of duck breast meat, which might be related to the liberation of actin. Three-stage cooking had the great advantages of improving meat tenderness and reducing cooking loss; therefore, this is to be recommended for further application and research.

Effect of mung bean and sprouted mung bean (Vigna radiata) powder on chicken breast meat tenderness, microbial and sensory characteristics.

Effect of mung bean and sprouted mung bean (Vigna radiata) was investigated on meat tenderness, microbial and sensory characteristics. Results showed that treatment of aqueous extract obtained from sprouted mung powder and mung powder have beneficial effect (P < 0.05) on tenderness of chicken breast meat. These extracts also showed (P < 0.05) antibacterial activity for meat bacteria; values of TPC and PPC (log cfu/gm) at 24h of marination were also lower than initial values in SMP and MP groups thus SMP and MP may contain some antibacterial substances which have beneficial effect on meat bacterial count. There was better (P < 0.05) cooking and sensory scores observed for marinated meat samples than control groups.

Effect of Flammulina velutipes on spent-hen breast meat tenderization

An experiment was carried out to investigate the effects of powdered vegetable dip sauces to improve the tenderness of spent-hen breast meat. Our overall purpose was to find lower-priced materials for the tenderization of spent-hen breast meat. The spent-hen breast meat was dipped into vegetable powder for 24 h at 4°C, and then the samples were analyzed. In the results for vegetable-powder treated samples, those treated with papain and pineapple had higher (P ≤ 0.05) myofibrillar fragmentation indices compared with those of the other samples. The kiwi-, pineapple-, and Flammulina velutipes-powder (winter mushroom) treated samples had new peptides of about 32 kDa and degradation to 30 kDa. Also, the Flammulina velutipes-powder treated samples showed new peptides of 15 kDa. These data imply that Flammulina velutipes is superior for common use than papain or pineapple for the tenderization of spent-hen meat.

Quality of meat from two 1970s and Ross 308 broiler strains fed drug-free low- and recommended-protein diets

SUMMARY A study was conducted to compare the quality of meat from a modern broiler strain (Ross 308; RS) with that of two 1970s strains fed drug-free low-protein (LP) and recommendedprotein (RP) diets from 1 to 30 d of age. The RP and LP starter and grower diets were fed from 1 to 16 d and from 16 to 30 d of age, respectively. The LP grower diet was fed to all birds from d 31 to 63. Breast and thigh meats were less (P < 0.05) fibrous for the RS strain than for the 1970s strains. The breast meat of the RS strain was also juicier (P < 0.05) than that of the 1970s strains when the LP diet was fed. Thigh meat from 7-wk-old birds was less fibrous (P < 0.05) than that from 9-wk-old birds. The LP diet improved (P < 0.05) the tenderness of breast and thigh meats, but the improvement in breast meat tenderness was significant (P < 0.05) only for 7-wk-old birds. Breast and thigh meats from RS birds had higher (P < 0.05) pH and water-holding capacity than those from the 1970s strains. Breast meat from the RS birds had a higher (P < 0.05) percentage of fat (1.23 vs. 0.55 and 0.73%) and a lower (P < 0.05) percentage of protein (24.17 vs. 24.90 and 24.78%) than the 1970s strains. Meat from the RS strain had better sensory attributes and quality characteristics than meat from the two 1970s strains. Meat from the 1970s strains had a higher protein content and lower fat content than meat from the RS birds. The LP diet can improve meat sensory attributes if the birds are slaughtered at 7 wk of age, but not at 9 wk of age.

Effect of alternative salt use on broiler breast meat yields, tenderness, flavor, and sodium concentration

Fresh chicken breast fillets were marinated with gourmet-style salts: Himalayan pink salt, Sonoma gourmet salt, sel gus de Guerande, and Bolivian rose salt to evaluate their effects on marination and cook loss yields, tenderness, sensory attributes, and sodium concentration. Fresh chicken breast fillets (48-h postmortem) were vacuum tumbled (137 kPa at 20 rpm for 17 min) in a solution of water, salt, and sodium tripolyphosphate at a level of 20% of the meat weights. Instrumental analyses showed no significant difference (P > 0.05) in meat quality with respect to marination yield, cook yield, or shear-force value. There were also no significant differences (P > 0.05) in sensory descriptors between salt treatments. However, Sonoma gourmet salt showed a tendency (P = 0.0693) to score increased savory note values from panelists, whereas Bolivian rose salt received the lowest score. There were no significant differences (P > 0.05) in sodium concentrations between salt treatments, but numerically, sel gus de Guerande had the lowest sodium concentration, which could be important in producing reduced sodium products. Understanding different salts and sodium concentrations allows the poultry industry to use gourmet salts in products and maintain overall meat quality and flavor.