• 한국식품영양과학회지
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• 제27권4호
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• pp.668-674
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• 1998

Physico-chemical qualities of pyunyuk depending on the cooking time were evaluated to produce high quality and to reduce labor and processing time. Pork headmeat divided into two parts was cooked for 1~4hrs, trimmed and pressed with 110kg/$\textrm{cm}^2$(gauge pressure) for 3.5hrs at 1$0^{\circ}C$. The contents of general nutrients, yield, texture, color, fatty acid composition, gel structure, and sensory evaluation were observed. Deboning time was very dependent on cooking time. Optimum cooking time observed in this study was 2~2.5hrs for efficiency of deboning and yield. Excess cooking time resulted in low yield and working efficiency. Yield variation depending on the cooking time was 14.3~26.0% and it was reduced by increasing the cooking time. The content of moisture was 53.5~54.8% which was not significantly different by cooking time. The content of crude fat was 14.2~26.0% which was decreased by increasing the cooking time. The contents of crude protein(21.1~26.3%) and mineral(1.4~2.7%) were increased by increasing the cooking time. The color of pyunyuk was significantly different by cooking time(p<0.05). In the texture, hardness and chewiness of the pyunyuk cooked for 2hrs were significantly higher than others processed in this study(p<0.05). However cohesiveness and springiness were not different among pyunyuks. With sensory evaluation, hardness was similar among the pyunyuks cooked over 2hrs. The pyunyuk cooked for 1hr showed higher value in juiciness than the pyunyuk cooked for 3~4hrs(p<0.05). The % of saturated fatty acids was decreased by increasing the cooking time, and gel structure of pyunyuk cooked for 2hrs was the most compact among treaments. In conclusion, 2hrs was proper as a cooking time concerned with working efficiency and physico-chemical quality of pyunpyk.

• Journal of Animal Science and Technology
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• 제47권6호
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• pp.1041-1050
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• 2005

돼지 뒷다리 부위를 동일한 비율의 양념액((T1, 간장소스; T2, 김치소스; T3, 새우젓소스; T4, 양파소스)에 침지하여 $1{\pm}1^{\circ}C$에서 30일간 저온에서 숙성기간 동안 양념 돈육의 품질 특성을 측정한 결과는 다음과 같다. 숙성기간동안 pH는 T3구가 가장 높게 나나났으며(p<0.05), 염도와 당도는 T1구가 높았다. 보수력은 T3를 제외하고는 숙성기간 동안 유의적인 차이가 없었다(p>0.05). 전단가는 T1구와 T4구는 숙성기간이 경과함에 따라 증가하였다(p<0.05). VBN은 T1구와 T3구는 숙성 20일까지 증가하다 30일에 다시 감소하였으며, T2구와 T4구는 숙성 20일 이후 급격히 증가하였다(p<0.05). TBARS는 T1구는 숙성 초기에 비해 숙성 20일 이후 크게 증가하였으며(p<0.05), T2구는 전 숙성기간 동안 큰 차이를 나타내지 않았다. 표면육색의 경우 L*값은 숙성 초기에 비해 숙성 말에는 감소하는 경향을 나타내었으며, a*값과 b*값은 숙성기간에 따라 T2구는 증가하고 T4구는 감소하였다. 심부육색에서 L*값은 숙성기간에 따라 T1구와 T3구는 낮아졌고 T4구는 유의적인 차이를 보이지 않았다. a*값과 b*값은 숙성기간에 따라 모든 처리구에서 증가하는 경향을 나타내었다. 총균수는 대부분 숙성 10일까지는 상승하다 숙성 말기에는 다소 감소하는 경향을 나타내었다. 처리구 간에 T3구는 숙성 초기부터 높게 나타났다(p<0.05). 대장균 수는 T4구를 제외한 나머지 처리구들에서는 숙성기간에 따라 감소하였다. 유산균 수는 T3구를 제외한 나머지 처리구들은 숙성기간에 따라 감소하는 경향을 나타내었다. 관능검사 결과 숙성기간에 따라 일정한 경향은 나타나지 않았으며 숙성 초기에 T4구에서 향, 풍미, 연도가 다른 처리구들보다 높게 나타났으며, 숙성 10일과 20일에는 T1구가 모든 항목에서 높은 점수를 나타내었다. 본 연구결과를 종합하면 처리구 간에 주목할 만한 품질의 차이는 나타나지 않았으며, 각 처리구마다 각각의 고유한 품질 특성을 나타냄으로써 숙성 양념육으로서의 가치를 가질 수 있을 것으로 판단된다.

• 한국축산식품학회지
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• 제20권2호
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• pp.152-158
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• 2000

본 연구는 황토광물 중 대표적인 광물인 illite를 첨가한 사료의 급여가 돈육질에 미치는 영향을 조사하기 위하여 illite 첨가사료를 급여한 돼지(시험구)와 일반사료를 급여한 돼지(대조구)를 도축하고, 24시간 냉각 후 등식육을 시료로 취하여 4℃ 냉장실에서 7일간 저장하면서 이화학적 특성 및 관능평가를 실시하여 최종육질을 조사하였다. 최종 pH는 대조구가 pH 5.58이었고 시험구가 pH 5.60로 나타나 모두 정상범위의 pH를 보였으며, 두 처리구 사이에 유의적인 차이는 없었다. 압착법에 의하여 측정된 보수력은 시험구가 대조구보다 다소 높게 나타났으나 유의적인 차이는 없었으며, 가열감량은 시험구가 대조구보다 다소 낮게 나타났다(p〈0.05). 도축 24시간 후와 7일간 저장 후 측정된 전단력은 대조구와 시험구 사이에 뚜렷한 차이가 없었으며, 육색측정 결과 L*-값과 a*-값은 시험구와 대조구 사이에 유의적인 차이가 없었으나, b*-값은 시험구가 대조구보다 유의적으로 낮은 값을 나타내었다(p〈0.05). 4℃에서 저장하는 동안 발생한 드립감량은 3일까지는 시험구가 대조구에 비하여 감량이 적은 것으로 나타났으나, 그 이후에는 유의적인 차이가 없었다. NPPC 육질평가 기준표에 의하여 평가한 육색은 대조구와 시험구가 대조구에 비하여 유의적으로 높은 것으로 나타났다. (p〈0.05). 조기가열육의 풍미, 맛, 연도는 대조구와 시험구사이에 큰 칭가 없었으나, 다즙성은 시험구가 대조구에 비하여 다소 우수한 것으로 나타났다.(p〈0.05).

• Journal of Animal Science and Technology
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• 제45권2호
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• pp.297-308
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• 2003

우지가 5% 첨가되어 있는 일반적인 비육후기사료를 급여한 돈육(C), 우지 함량 중 2%를 들깨유로 대체 급여한 돈육(T1), 들깨유 2%에 비타민 E를 250ppm 첨가한 돈육(T2), 오징어유 2%를 대체 급여한 돈육(T3), 오징어유 2%에 비타민 E를 첨가 급여한 돈육(T4), CLA를 2% 대체 급여한 돈육(T5)의 육질특성을 조사한 결과는 다음과 같다. 지방산 조성에 있어서 오일간에는 T5가 다른 세 처리구들(C, T1, T3)에 비하여 SFA와 EFA는 높은 반면 UFA, MUFA, UFA/SFA MUFA/SFA는 낮았다. 총아미노산 함량은 오일간에는 T3가 다른 세 처리구들 (C, T1, T5)보다 높았으며, 동일한 오일에서는 비타민 첨가에 따라 높게 나타났다. TBARS의 경우 오일간에는 C와 T1에 비하여 T3와 T5가 높았고, VBN은 C

• Animal Bioscience
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• 제36권6호
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• pp.943-952
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• 2023

Objective: For decades, LYD ([Landrace×Yorkshire] ♀×Duroc ♂) pigs are the most commonly-used commercial breed for meat production in Korea. Recently, due to the increasing demand for premium pork, the National Institute of Animal Science (Korea) has synthesized a novel pig breed named Woori Heukdon (WHD). This study aimed at comparing the carcass traits, meat yield and quality characteristics between the LYD and WHD pigs under identical rearing condition. Methods: The WHD and LYD pigs (n = 15 each) were reared under identical conditions and fed the same commercial diet until reaching recommended market weight (100 to 120 kg). After slaughter, the carcasses were evaluated for traits and meat yield, and the meat quality was assessed on shoulder butt and belly cuts. Results: Although no significant differences (p>0.05) occurred in slaughter weight between two pig types, WHD had a lower meat yield (by about 6 kg corresponding to approximately 7%) compared to the LYD pigs (p<0.05). The WHD had a higher fat content (by 4.26% and 13.52% in the shoulder butt and belly, respectively) compared to those of LYD pigs (p<0.05). The WHD meat showed a lower cooking loss and higher a* (redness) value (p<0.05). The WHD belly had a significantly (p<0.05) higher oleic acid content and concentrations of nonanal, octanal and decanal associated with fatty odor while, the LYD meat had a higher number of pyrazines associated with roasty odor. Regarding sensory quality, higher flavor, juiciness, and acceptability higher scores were given for the WHD meat than for the LYD meat (p<0.05). Conclusion: Under identical rearing conditions the WHD exhibited a better meat quality and sensory properties. However, the use of this diet resulted in a high fat level that may be associated with high trimming loss for the WHD.

• 동아시아식생활학회지
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• 제26권3호
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• pp.250-259
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• 2016

본 연구는 감귤껍질 첨가가 돈육 patty의 냉장저장 중 이화학적 품질에 미치는 영향을 규명하고자 하였다. 돈육 patty는 돈육 68%, 돼지지방 20%, 소금 2%, 냉수 10%를 배합하여 제조한 대조군(T0), 여기에 감귤껍질 0.3% 첨가한 T1, 0.7% 첨가한 T2 그리고 1.0%를 첨가한 T3 등 네 종류의 돈육 patty를 제조하였다. pH는 저장 중 일률적인 변화를 보이지 않았으며, T2 및 T3가 T0 및 T1보다 낮았다. 명도는 저장 중 변화가 없었으며, 시료들 사이에도 차이가 없었다. 저장 중 적색도는 감소하였으며, 대조군이 가장 낮았다. 황색도는 저장중 유의한 변화가 없었으며, 감귤껍질을 첨가한 돈육 patty가 높았다. TBARS는 저장 중 유의하게 증가하여 저장 10일째 T0, T1, T2 및 T3가 각각 0.82, 0.32. 0.26 및 0.26 mg/kg을 나타내었다. DPPH 라디칼 소거활성은 저장 중 유의하게 감소하여 저장 10일째 각각 10.48, 23.76, 27.60 및 29.26%를 나타내었으며, T2 및 T3가 T0 및 T1보다 높았다. VBN 함량은 T0 및 T1는 저장 중 증가하여 저장 10일째 각각 11.66 및 10.40 mg%를 나타내었으며, 저장 10일째 대조군인 T0가 가장 높았다. 저장 중 보수력은 감소하여 저장 10일째 각각 75.58, 75.83, 75.71 및 75.16%를 나타내었으며, 감열감량은 저장 중 증가하여 저장 10일째 각각 23.69, 23.16, 22.98 및 23.92%를 나타내었다. 그러나 시료들 사이에는 보수력과 가열감량의 차이가 없었다. 경도는 저장 10일째 $3.20{\sim}3.34g/cm^2$로 증가하였으며, 씹힘성은 13.12~13.53 g으로 증가하였다. 탄성은 저장 10일째 49.34~50.12%로 감소하였으며, 응집성은 56.81~57.48%로 감소하였다. 그러나 시료들 사이에 경도, 씹힘성, 탄성 및 응집성은 차이가 없었다. 이상의 결과에서 감귤껍질은 항산화 작용이 있으면서 물리적 특성에 영향을 미치지 않았기 때문에 천연 항산화제로서 이용이 가능하며, 육 제품 고유의 색깔을 고려하면 0.7%의 첨가가 적당할 것으로 판단된다.

• Journal of Animal Science and Technology
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• 제61권1호
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• pp.28-34
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• 2019

Liver sausage is flavorful and highly nutritious. However, liver has a relatively short shelf life due to acceleration of oxidation in the presence of endogenous enzymes and metals. Powders derived from natural sources, including plants or fruits, are applied to meat products for inhibiting oxidation without adverse effects on their quality. Hence, this study investigated the effects of natural powders derived from green tea leaf (GTL), lotus leaf (LL), and kimchi (KC) on the quality and change in lipid oxidation and freshness of chicken liver sausages during two weeks of storage. Chicken liver sausages were manufactured with chicken breast (70%) and liver (20%), pork back fat (5%), iced water (5%), various additives, and GTL, LL, and KC [0 (control) or 1%]. They were processed in three batches. For determination of the quality characteristics of chicken liver sausages with various plant powders, pH, color, and texture properties were assessed. In addition, lipid oxidation and freshness using thiobarbituric acid reactive substances (TBARS) and total volatile basic nitrogen (TVBN) were analyzed at day 0 and week 2 of refrigerated storage. Higher values were obtained for pH and cooking yield in sausage samples with LL and KC powders than in samples with the other treatments. For a* values, the sausage samples with KC showed similar (p > 0.05) values, whilst others had significantly lower values than the control. The addition of the three powders to sausage samples induced an increase (p < 0.05) in hardness, gumminess, and chewiness. The addition of plant powders did not influence TBARS and TVBN of sausage samples at the initial stage. However, after two weeks of storage, significantly lower TBARS and TVBN values were observed, and the sausage with KC (p < 0.05) showed the lowest values of both TBARS and TVBN. The results showed the potential ability of the three powders to improve the quality and inhibit lipid oxidation in liver sausages. Particularly, the addition of KC did not adversely affect the $a^*$ values of sausage samples. The effects on sensory properties and inhibition mechanisms of GTL, LL, and KC in meat products should be further studied.

• 한국축산식품학회지
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• 제34권6호
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• pp.727-735
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• 2014

This study was conducted to determine the effects of using mechanically deboned chicken meat (MDCM) and collagen on quality characteristics of semi-dried chicken jerky. In experiment I, semi-dried chicken jerky was prepared with the replacement of chicken breast with MDCM (0, 10, 20, and 30%). The pH value of the jerky formulated with only chicken breast was 5.94, while the replacement of chicken breast with MDCM significantly increased the pH (p<0.05). The protein content and shear force of the jerkies decreased with increasing amounts of MDCM, whereas the fat, ash content and processing yield showed the opposite tendency (p<0.05). Replacement with up to 10% MDCM had no adverse effects on the sensory characteristics of the semi-dried chicken jerky. In experiment II, four levels of pork collagen (0, 1, 2, and 3%) were added to the semi-dried chicken jerky formulated with 90% chicken breast and 10% MDCM. The addition of collagen increased the moisture content, but decreased the ash content of the jerkies produced (p<0.05). The processing yield of the jerkies increased with increasing added amounts of collagen (p<0.05). It was found that the jerkies formulated with 0-2% collagen had significantly higher overall acceptance score than those prepared with 3% collagen (p<0.05). In conclusion, MDCM and collagen could be useful ingredients to reduce the production cost and improve the processing yield of semidried chicken jerky. The optimal levels of MDCM and collagen which could be added without adverse effects on the sensory characteristics were up to 10% and 2%, respectively.

• 한국식생활문화학회지
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• 제23권4호
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• pp.507-513
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• 2008

The development of soy cutlets containing textured soy protein (TSP) as a meat analog was studied. In order to decrease the beany flavor and to increase the texture, TSP was treated with 0.3% Flavourzyme or 0.1% Protamex for 10 or 20 min, respectively. The degree of hydrolysis for TSP treated with Protamex was higher than that treated with Flavourzyme. Hydrolysis was observed to increase as the reaction time was increased for both Flavourzyme and Protamex. The water holding capacity of TSP treated with Protamex for 10 min was the highest, and that treated with Flavourzyme for 20 min was similar to that of Protamex treatment for 20 min. The oil binding capacity of TSP treated with Protamex for 20 min was the highest. The hardness of the soy cutlets using TSP treated with Flavourzyme for 10 min was higher than that treated for 20 min, while that of Protamex treated for 20 min was higher than that treated for 10 min. The cohesiveness of the soy cutlets using TSP treated with Flavourzyme or Protamex for 10 min was higher than those treated for 20 min. The chewiness of the soy cutlets treated with Flavourzyme for 10 min was higher than for those treated for 20 min, while those treated with Protamex for 20 min was higher than those treated for 10 min. The springiness of TSP treated with Flavourzyme for 20 min was higher than those treated for 10 min, and higher than those treated with Protamex for 10 or 20 min. For sensory evaluation, the beany flavor of the soy cutlets treated with Protamex for 20 min was the weakest. The flavor and chewiness of both a pork cutlet and a soy cutlet treated with Protamex for 20 min were the best. In the overall quality, soy cutlets treated with Protamex for 20 min was the most desirable. In conclusion, soy cutlets treated with 0.1% Protamex for 20 min could be a reasonable substitute of pork cutlets.

• 한국식품영양과학회지
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• 제23권5호
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• pp.832-836
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• 1994

가열온도를 $58^{\circ}C\;및\;65^{\circ}C$로 하고 가각 가열시간을 달리하여 제조한 돈육소시지의 몇가지 특성을 검토하였다. 소시지의 표면색도는 $58^{\circ}C$로 가열하였을 때에 l(명도), a(적색도) 및 b(황색도)값이 각각 64.60~65.26, 9.14~9.94 및 8.68~9.34이었고 $65^{\circ}C$ 가열의 경우는 각각 65.16~66.68, 8.78~9.62 및 7.66~8.36이었다. 그리고 gel강도는 $58^{\circ}C$에서 120분 이상 가열, $65^{\circ}C$에서 40분 간의 가열이 높앗으며, $NO_2$의 잔존량은 $58^{\circ}C가\;65^{\circ}C$의 가열 보다 더 높았고 가열시간이 길어지면서 감소하는 경향이었다. 총균수는 $58^{\circ}C$의 가열이 더 많았으며 전제적으로 $8.7{\times}10^{2}~3.5{\times}10^{3}$이었다. 유리아미노산 함량은 $58^{\circ}C와\;65^{\circ}C$ 가열 사이에 현저한 차이는 없었고 Asp, Glu 및 Lys가 많이, Cys, Met 및 Tyr 등이 적게 함유되어 있었다. 관능검사 결과 역시 가열온도와 시간에 따른 차이가 없었다.