Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Comparison of the Palatability Related with Characteristics of Beef Carcass Grade B2 and D

상등급과 등외등급 쇠고기의 기호특성 비교

  • 문윤희 (경성대학교 식품공학과) ;
  • 강세주 (경성대학교 식품공학과) ;
  • 현재석 (제주산업정보대학 관광식품산업계열) ;
  • 강희곤 (서울특별시 보건환경연구원) ;
  • 정인철 (대구공업대학 식음료조리과)
  • Published : 2001.12.01
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Abstract

Two kinds of samples were prepared from the loin in the carcass with grade B2 and D, which were chilled for 24 hour after slaughter. The fresh beef in this study were obtained by chilling the loin for 1 day after wrapping them. On the other hand, the chilled beef were obtained by cutting the loin by 500 g and chilling them for 30 day after vacuum packing. The experiment was carried out to compare the palatability related with characteristics of loin with grade B2 and D and to investigate the chilling effect of the loin with grade D. In the case of fresh beef, it was found that the loin with grade B2 has better meat color, but lower pH, lactic acid content, and myoglobin content, than them of the loin with grade D. Also, the loin with grade B2 has lower tenderness due to its low hardness and chewiness, and high myofibrillar fragmentation index (MFI). Furthermore, it has high monounsaturated fatty acid/saturated fatty acid (MUFA/SFA) and ATP content, and good raw meat aroma. It also shows an excellent palatability of cooked meat, although it has low cooking loss and heat shotening. On the other hand, the loin with grade D has higher chilling effect on hardness, chewiness, MFI and MUFA/SFA, than them of the loin with grade B2. However, in the case of chilled beef, the loin with grade D shows much worse tenderness, cooked meat aroma, and palatability than them of the loin with grade B2.

도축 후 24시간 냉장한 상등급(B2 등급)과 등외등급(D 등급) 쇠고기 지육에서 등심부위를 분할하여 두 쪽으로 나누어 한 쪽은 랩으로 싸서 1일간 냉장하고, 다른 한 쪽은 500g씩 자르고 진공포장하여 30일간 냉장하여 전자는 신선육, 후자는 냉장육이라 하였다. 상등급육과등외등급육의 기호특성을 비교하고 등외등급육의 냉장효과를 알아보기 위하여 신선육과 냉장육의 색도, 연도, ATP 관련물질, 지방산 조성 및 관능평가에 대한 실험을 하였다. 신선육의 경우 상등급육이 등외등급육에 비하여 pH. 젖산함량, 미오글로빈 함량이 낮고 표면색이 우수하였다. 상등급육은 경도와 저작성이 낮으면서 근원섬유 소편화도가 높아 연한 현상을 보였다. 상등급육은 포화지방산 함량이 낮고 단일 불포화지방산에 대한 포화지방산의 비율(MUFA/SFA)과 ATP 함량이 높고, 생육향이 우수하였다. 상등급육은 가열감량 및 가열단축도가 낮은 반면 가열육의 기호성이 현저히 우수하였다. 등외등급육은 상등급육에 비해서 경도, 저작성, 근원섬유 소편화도 및 MUFA/SFA에 대한 냉장효과가 크게 나타났다. 그러나 냉장육의 연도, 가열육 향 그리고 기호성이 등외등급육에 비해 상등급육이 현저히 우수하였다.

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