• 한국식품저장유통학회지
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• 제31권1호
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• pp.1-14
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• 2024

The utilization of coatings composed of bio-based materials in the processing and preservation of meat presents an environmentally conscious, secure, cost-effective, and superior method for prolonging the storage life of meat while also preserving its nutritional value. In this study, changes in physical, chemical, and microbiological characteristics of freshly cut beef coated with distilled water (control) and keratin-starch composites (K-S) functionalized with 0.0-, 0.2-, 0.6-, and 1.0-mL avocado peel polyphenolic-rich extract (APPPE) kept at 4℃ for 12 days were evaluated periodically at 3-day interval using standard techniques. Keratin was extracted from waste feathers, while starch was obtained from ginger rhizomes. Following a 12-day storage period, beef coated with APPPE-enriched K-S composites exhibited a significant (p<0.05) improvement in shelf life by minimizing deteriorative changes in pH and color (as determined by metmyoglobin level) in addition to inhibiting oxidative changes in lipids (as determined by TBARS level) and proteins (protein carbonyl level) in comparison to control and K-S composite without APPPE. Furthermore, microbial growth was significantly (p<0.05) suppressed in meat coated with K-S composite functionalized with APE at 0.6 and 1.0 mL compared to the control. The study suggested that APPPE-enriched K-S composite could offer an eco-friendly and safe food preservation technique for fresh meat.

• Journal of Animal Science and Technology
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• 제66권2호
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• pp.251-265
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• 2024

Meat derived from skeletal muscles of animals is a highly nutritious type of food, and different meat types differ in nutritional, sensory, and quality properties. This study was conducted to compare the results of previous studies on the muscle fiber characteristics of major porcine skeletal muscles to the end of providing basic data for understanding differences in physicochemical and nutritional properties between different porcine muscle types (or meat cuts). Specifically, the muscle fiber characteristics between 19 major porcine skeletal muscles were compared. The muscle fibers that constitute porcine skeletal muscle can be classified into several types based on their contractile and metabolic characteristics. In addition, the muscle fiber characteristics, including size, composition, and density, of each muscle type were investigated and a technology based on these muscle fiber characteristics for improving meat quality or preventing quality deterioration was briefly discussed. This comparative review revealed that differences in muscle fiber characteristics are primarily responsible for the differences in quality between pork cuts (muscle types) and also suggested that data on muscle fiber characteristics can be used to develop optimal meat storage and packaging technologies for each meat cut (or muscle type).

• Asian-Australasian Journal of Animal Sciences
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• 제20권6호
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• pp.1002-1006
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• 2007

Twenty four broilers (Ross) and 24 ducklings (Cherry berry) aged 45days were stunned and killed by conventional neck cut to evaluate the meat characteristics and fatty acid composition of breast meat. Breast meats were removed from each carcass at different post-mortem times. After complete processing, the breast meats were then placed in a polythene bag and kept in a cold storage room at $4^{\circ}C$ for 7 days. The pH of meat samples at different post-mortem times, and meat characteristics and fatty composition at different storage times were evaluated. No significant differences were found in pH at different post-mortem times except at 30 min postmortem, where duck breast showed significantly lower pH than chicken breast. As expected, duck breast meat had significantly higher redness (a*), but lower lightness (L*) value compared to chicken breast. During whole storage time, the a* value remained constant in duck breast. Cooking loss (%) was higher in duck breast compared to chicken breast during the whole storage time. Shear force decreased with increasing storage time in both chicken and duck breast meat, moreover, it decreased rapidly in duck breast compared to chicken breast. The TBARS values increased with increasing storage time in both duck breast and chicken breast meat and was significantly higher in duck breast. The fatty acids (%) C14:0, C16:0, C16:1, C18:2 and C18:3 were significantly higher while C18:0 was significantly lower in duck breast compared to chicken. SFA was increased, while USFA and MUSFA decreased only in duck breast during the 7 day storage time.

• Animal Bioscience
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• 제34권1호
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• pp.127-133
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• 2021

Objective: This study was conducted to evaluate the correlation between body size traits, carcass traits, and primal cuts in Hanwoo steers. Methods: Sixty-one beef carcasses were classified for conformation and primal cut weight. Additionally, carcass weight, fat thickness, carcass dimensions, and longissimus muscle area were determined to complement the grading. Results: The average live weight and cold carcass weight were 759 and 469 kg, respectively. The mean carcass meat, fat, and bone proportions were 551, 298, and 151 g/kg, respectively. Primal cuts weights showed significant positive correlations (p<0.001) of 0.42 to 0.82 with live weight, carcass weight, and longissimus muscle area and a significant negative correlation with carcass fat (without shank, -0.38 to -0.10). Primal cut weights were positively correlated (p<0.01) with carcass length (0.41 to 0.77), forequarter length (0.33 to 0.57), 6th lumbar vertebrae-heel length (0.33 to 0.59), 7th cervical vertebrae carcass breadth (0.35 to 0.58), 5th to 6th thoracic vertebrae breadth (0.36 to 0.65), 7th to 8th thoracic vertebrae girth (0.38 to 0.63), and coxae girth (0.34 to 0.56) and non-significantly related to cervical vertebrae length and coxae thickness. Conclusion: There was a high correlation among live weight, carcass weight, longissimus muscle area, carcass length, 7th cervical vertebrae carcass breadth, 5th to 6th thoracic vertebrae breadth, and 7th to 8th thoracic vertebrae girth of the primal cuts yield. The correlation between fat and primal cut yields was highly significant and negative. Carcass length and 7th to 8th thoracic vertebrae girth, appear to be the most important traits affecting primal cut yields.

• 한국가금학회지
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• 제23권4호
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• pp.193-201
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• 1996

This experiment was carried out to find out the effect of packing methods on physico-chemical properties of breast and thigh meats in chicken, which was dried by air spray chilling method. The chicken carcass was cut into breast and thigh muscles, which were either vacuum packed or atmosphere packed, and stored at -2O˚C for 1, 4, 8, 12 and 16 wk after quick freezing at -45˚C for 35 min. The pH values of atmosphere-packed breast meat and vacuum-packed breast meat after one wk of storage were higher than those of atmosphere-packed thigh meat and vacuum-packed thigh meat(P< .05). The pH values increased as storage period extended, but no significant difference was detected between two packing method(vacuum vs. atmosphere). Total moisture contents of breast meats after one wk of storage were higher than those of thigh meats. The total moisture contents decreased slowly as storage period extended, but no significant difference was detected between two packing method(vacuum vs. atmosphere). The shear force value of thigh meat was higher than that of breast meat. The shear force values of both meats decreased as storage period extended, regardless of packing method. The water soluble protein extractability of thigh meats was higher than that of breast meat, and the water soluble protein extractability of all treatments decreased until 8 wk after storage, but increased gradually after 8 wk of storage period. The salt soluble protein extractability of breast meat was higher than that of thigh meat, and the salt soluble protein extractability of all treatments decreased as storage period extended. With regard to the packing method, the vacuum packing showed higher value than that of atmosphere packing method until 8 wk of storage. Total lipid contents of atmosphere- and vacuum-packed thigh meats at 1 wk of storage were higher than those of breast meats, and the total lipid contents of all of treatments decreased as storage period extended. However, no significant difference was detected between two packing methods. The fatty acid contents of breast and thigh meats were in order of o1eic(33,5~42.4), palmitic(19.7~30.8) and linoleic acid(10.8~17.4).

• 한국축산식품학회지
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• 제33권1호
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• pp.125-132
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• 2013

본 연구는 돼지의 웅돈 계열에 따른 효과를 알아보기 위하여 425두에 대하여 도체특성, 부분육 생산량 및 육질특성을 조사하였다. 웅돈계열은 수입국과 품종에 따라 5계열(D1, D2, B1, B2, BD)로 나누었다. 결과를 살펴보면, D1계열과 D2계열에서 높은 1+등급 출현율을 보였고, 육량등급에서는 B1, B2, D1계열에서 높은 A등급 출현율을 보였다. 부분육 생산량에서 D1계열이 목심, 갈비, 앞다리, 등심, 삼겹살, 안심에서 많은 부분육 생산량을 보였다. 일반성분에서 수분함량은 B1계열에서 가장 높은 수분함량을 보였으며, D1계열에서 유의적으로 높은 단백질함량과 지방함량은 보였다(p<0.05). 전단가는 B1계열에서 유의적으로 낮은 값을 보였다(p<0.05). 육색은 D1, D2, BD계열에서 유의적으로 높은 명도 값을 보였고, B2계열에서 유의적으로 낮은 값을 보였으며, D1, D2, BD계열에서 유의적으로 높은 황색도 값을 보였다(p<0.05). 관능평가는 D1과 D2계열에서 유의적으로 낮은 육즙 삼출을 보였고, 마블링과 종합적인 기호도에서 유의적으로 높은 값을 보였다(p<0.05). 따라서 본 연구의 결과를 종합해 볼 때 웅돈의 선택에 있어서 1+등급 출현율이 높고, 삼겹살 중량이 많고, 명도 값이 높으며, 관능평가에서 좋은 결과를 보여준 D1과 D2계열을 이용하는 것이 생산자 및 농가 소득에 도움이 될 것으로 사료된다.

• Journal of Animal Science and Technology
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• 제49권4호
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• pp.523-530
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• 2007

본 연구는 총 127두(암퇘지 30두, 수퇘지 97두) 재래돼지의 출하체중별 도체특성, 부분육 생산율 및 육질특성을 조사하였다. 본 연구에 이용된 재래돼지의 평균 출하체중, 도체율 및 거래정육율은 수컷이 각각 74.69kg, 71.14% 및 61.09%이었고 암컷은 75.5kg, 73.88% 및 56.25 %이었다. 결과적으로 암퇘지가 수퇘지에 비하여 생체중 및 도체율이 약간 높게 나타난 반면에 거래정육율은 수퇘지가 암퇘지와 비교하여 약간 높은 경향을 나타냈으나 성별 그룹간에 유의적인 차이는 없는 것으로 나타났다(p>0.05). 재래돼지의 일반성분 특성에서 암퇘지 그룹이 수퇘지 그룹보다 높은 지방 함량을 보였으며, 수퇘지에서는 출하체중에 관계없이 지방 함량이 낮은 경향을 나타냈다. 또한 단백질 함량은 출하체중이 증가할수록 암퇘지 및 수퇘지 모두 증가하는 경향을 보였다. 근내지방 함량이 높은 암퇘지의 경우 동일한 체중그룹에 속하는 수퇘지와 비교하여 전단력이 낮고 보수력이 높은 경향으로 나타났다. 육색에서 암퇘지가 수퇘지와 비교하여 전반적으로 L값(명도), a값(적색도), 및 b값(황색도)이 모두 높은 경향을 나타냈으나 유의적인 차이는 황색도에서만 암퇘지가 더 높은 것으로 나타났다(p<0.05). 따라서 본 연구결과는 재래돼지의 출하체중과 성별에 따른 적절한 품질인증기준을 설정하는데 중요한 자료로 사용될 수 있을 것으로 생각된다.

• 한국식생활문화학회지
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• 제31권1호
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• pp.51-63
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• 2016

The aim of this study was to investigate food culture represented by the grain yard, water well, kitchen, and meat storage space which were depicted in the mural painting of An-Ak tomb No. 3. The mural paintings of An-Ak tomb No. 3 were compared with those of ancient Chinese tombs before the 4th century in order to understand their characteristics. Above all, the tomb murals describe the form and function of the stove (buttumak) as well as the cuisine using the cauldron (sot) and steamer (siru) in a very interesting manner. The meat storage space of An-Ak tomb No. 3 shows whole carcasses of animals such as roe deer, dog, and pig. However, Chinese murals show that while small animals such as soft-shelled turtle, fish, chicken, duck, pheasant, rabbit, etc. were stored as whole carcasses without being cut into pieces, large animals such as cows and pigs were slaughtered and each piece of their carcasses such as the head, thigh, meat loaf, and cardiopulmonary part was separately depicted. These tomb murals vividly describe the food culture of Koguryo and China before the 4th century.

• Asian-Australasian Journal of Animal Sciences
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• 제29권12호
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• pp.1782-1789
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• 2016

This study evaluated the effect of vacuum and modified atmosphere (40% $CO_2+60%$ $N_2$, MA) packaging on the chemical composition, physicochemical properties and sensory attributes of chill-stored meat from 10 fallow deer (Dama dama) bucks at 17 to 18 months of age. The animals were hunter-harvested in the forests of north-eastern Poland. During carcass dressing (48 to 54 h post mortem), both musculus longissimus muscles were cut out. Each muscle was divided into seven sections which were allocated to three groups: 0, A, and B. Samples 0 were immediately subjected to laboratory analyses. Samples A were vacuum-packaged, and samples B were packaged in MA. Packaged samples were stored for 7, 14, and 21 days at $2^{\circ}C$. The results of the present study showed that the evaluated packaging systems had no significant effect on the quality of fallow deer meat during chilled storage. However, vacuum-packaged meat samples were characterised by greater drip loss. Vacuum and MA packaging contributed to preserving the desired physicochemical properties and sensory attributes of meat during 21 days of storage. Regardless of the packaging method used, undesirable changes in the colour, water-holding capacity and juiciness of meat, accompanied by tenderness improvement, were observed during chilled storage.

• 한국축산식품학회지
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• 제40권6호
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• pp.957-968
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• 2020

The influence of muscle architecture on muscle fiber characteristics and meat quality has not been fully elucidated. In the present study, muscle fiber characteristics on the chop surface of pork loin (M. longissimus thoracis et lumborum, LTL), pennation angle degree, and meat quality were evaluated to understand the pork LTL architecture and its relationship with the loin chop quality. Muscle fiber pennation degree ranged from 51.33° to 69.00°, resulting in an ellipse-shaped muscle fiber on the surface of pork loin chop. The cross-sectional area (CSA) on the sections cut vertical to the muscle length (M-Vertical) was considerably larger (p<0.05) than that on the sections cut vertical to the muscle fiber orientation (F-Vertical) regardless of the fiber type. Pennation angle is positively correlated with CSAs of F-Vertical (p<0.05) and with Warner-Bratzler shear force (r=0.53, p<0.01). Besides the shear force, lightness and pH were positively correlated with the fiber composition and CSA of IIX fiber (p<0.05); however, the redness, yellowness, drip loss, and cooking loss were not correlated with the pennation angle and muscle fiber characteristics on the chop surface (p>0.05). These observations might help us in better understanding pork loin architecture and the relationship between the pennation angle, muscle fiber characteristics, and meat quality of pork loin chop.