Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Chemical Composition, Cholesterol, Trans-Fatty Acids Contents, pH, Meat Color, Water Holding Capacity and Cooking Loss of Hanwoo Beef (Korean Native Cattle) Quality Grade

한우육의 육질등급에 따른 부위별 일반성분, pH, 육색, 보수력, 가열감량, 콜레스테롤 및 트랜스지방산 함량

  • Lee, Yeon-Jung (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Kim, Cheon-Jei (Department of Food Science and Biotechnology of Animal Resoures, Konkuk University) ;
  • Park, Beom-Young (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Seong, Pil-Nam (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Kim, Jin-Hyoung (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Kang, Geun-Ho (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Kim, Dong-Hun (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Cho, Soo-Hyun (Animal Products Research and Development Division, National Institute of Animal Science)
  • 이연정 (농촌진흥청 국립축산과학원) ;
  • 김천제 (건국대학교 축산식품생물공학과) ;
  • 박범영 (농촌진흥청 국립축산과학원) ;
  • 성필남 (농촌진흥청 국립축산과학원) ;
  • 김진형 (농촌진흥청 국립축산과학원) ;
  • 강근호 (농촌진흥청 국립축산과학원) ;
  • 김동훈 (농촌진흥청 국립축산과학원) ;
  • 조수현 (농촌진흥청 국립축산과학원)
  • Received : 2010.04.18
  • Accepted : 2010.11.02
  • Published : 2010.12.31
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Abstract

The objective of this study was to investigate the proximate composition, pH, meat color, water holding capacity (WHC), cooking loss (CL), cholesterol content, and trans-fatty acid content of Hanwoo beef according to quality grade and cut. Five cuts [Cheggt (strip loin), Dngsim (loin), Moksim (chuck roll), Udoon (top round), Yanggi (brisket)] were obtained from 15 Hanwoo animals [3 bulls and 12 steers, 24-30 months old]. Three animals were selected from each quality grade of $1^{++}$, $1^+$, 1, 2, and 3. The protein and moisture contents (%) were significantly higher, and the fat contents (%) were significantly lower in 3 quality grade compared to the other grades (p<0.05). pH values of chuck roll and strip loin were significantly lower in $1^+$ quality grade (5.61 and 5.51) than those in 3 quality grade (5.88 and 5.92) (p<0.05). CIE L* values were significantly higher in the $1^{++}$ quality grade group (38.52-42.69%) than in 3 quality grade (33.02-36.08) (p<0.05). In the $1^{++}$ and 2 quality grade groups, CIE $L^*$ values of loin were significantly higher than those of other cuts (p<0.05). CIE $a^*$ values of loin (28.11) in 1 quality grade were the highest, whereas those of strip loin (15.36) in 3 quality grade were the lowest (p<0.05). WHC was not significantly different among the five cuts or quality grades. In CL, loin and strip loin were significantly lower in $1^{++}$ quality grade than in 3 quality grade (p<0.05), and they were also significantly lower (22.21-24.81%) than the other cuts in the same quality grade (p<0.05). The loin in $1^{++}$ (41.26 mg/100 g), $1^+$ (43.23), and 1 quality grades (48.63) had higher cholesterol contents (%) than in 2 (36.02) and 3 quality grades (29.84) (p<0.05). Cholesterol contents of the five cuts in $1^{++}$ quality grade (39.44-43.31%) were significantly higher than those in 3 quality grade (28.09-32.39%). The trans-fatty acid contents of the five cuts were 1.08-2.72%. The loin, strip loin, brisket, and top round in 3 quality grade had significantly higher trans-fatty acid contents than those of the other grades (p<0.05).

본 연구는 수소 및 거세우(24-30개월) 15두(각 육질등급별 3두씩)를 공시축으로 이용하여 우육의 부위(목심, 채끝, 우둔, 양지머리, 등심)에 따른 육질등급($1^{++}$, $1^+$, 1, 2, 3)별 일반성분, pH, 육색, 보수력, 가열감량, 콜레스테롤 및 트랜스지방산 함량을 조사하였다. 일반성분에서 단백질함량은 16.66-22.64% 범위고 수분함량은 57.40-75.69% 범위 였으며 지방함량은 0.61-24.74%로 나타났다. 육질등급별 단백질함량은 $1^{++}$등급 목심, 채끝, 양지머리, 등심부위가 16.66-19.26%범위로 유의적으로 낮은 함량을 나타난 반면에 3등급에서는 21.50-22.48%로 유의적으로 높게 나타났다(p<0.05). 수분함량은 3등급이 다른 육질등급에 비해 유의적으로 높게 나타난 반면에 지방함량은 유의적으로 낮게 나타났다(p<0.05). pH는 5.49-5.88범위로 $1^+$등급 목심(5.61)과 채끝(5.51)이 3등급 목심(5.88), 채끝(5.92)부위보다 유의적으로 낮게 나타난 반면에 우둔과 양지머리 및 등심부위에서는 육질등급 간에 유의적인 차이가 나타나지않았다(p>0.05). $L^*$은 $1^{++}$ 등급육이 38.52-42.69범위로 3등급육(33.02-36.08)보다 유의적으로 높게 나타났다(p<0.05). $1^{++}$, 2등급 등심의 $L^*$은 각각 42.69, 40.15로 우둔부위(38.52, 35.42)보다 유의적으로 높게 나타났다(p<0.05). $a^*$은 3등급 채끝(15.36)과 등심부위(18.48)가 1등급 채끝과 등심부위(23.35, 28.11)보다 유의적으로 낮게 나타났다(p<0.05). 보수력은 등급 또는 부위에 따른 유의적인 차이는 나타나지 않았다(p>0.05). 가열감량은 $1^{++}$ 등급 등심부위(22.21)가 3등급(27.67%)보다 유의적으로 낮게 나타났으며(p<0.05) $1^{++}$, $1^+$, 1 등급 우둔과 양지머리부위가 28.98-31.39% 범위로 채끝과 등심부위(22.21-24.81%)보다 유의적으로 높게 나타났다(p<0.05). 콜레스테롤 함량(mg/100 g)은 $1^{++}$(41.26), $1^+$(43.23), 1등급(48.63) 등심이 2(36.02), 3등급(29.84)보다 유의적으로 높은 함량을 나타냈으며(p<0.05) $1^+$(43.23), 1등급 등심(48.63)이 $1^+$, 1등급 우둔부위(36.64, 35.39)보다 유의적으로 높게 나타났다(p<0.05). 트랜스지방산 함량은 1.08-2.62% 범위로 3등급이 다른 육질등급에 비해 유의적으로 높게 나타났다(p<0.05). 이러한 결과는 한우의 육질등급별로 일반성분 및 콜레스테롤과 트랜스지방산 함량에 대한 중요한 자료가 될 것이다.

Keywords

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