Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Effects of Drying Conditions on Quality Properties of Pork Jerky

건조조건이 돈육 육포의 품질특성에 미치는 영향

  • Han, Doo-Jeong (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Jeong, Jong-Youn (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Choi, Ji-Hun (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Choi, Yun-Sang (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Hack-Youn (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Lee, Mi-Ae (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Lee, Eui-Soo (Department of Applied Microbiology and Food Science, University of Saskatchewan) ;
  • Paik, Hyun-Dong (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Cheon-Jei (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
  • 한두정 (건국대학교 축산식품생물공학) ;
  • 정종연 (건국대학교 축산식품생물공학) ;
  • 최지훈 (건국대학교 축산식품생물공학) ;
  • 최윤상 (건국대학교 축산식품생물공학) ;
  • 김학연 (건국대학교 축산식품생물공학) ;
  • 이미애 (건국대학교 축산식품생물공학) ;
  • 이의수 ;
  • 백현동 (건국대학교 축산식품생물공학) ;
  • 김천제 (건국대학교 축산식품생물공학)
  • Published : 2007.03.31
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Abstract

We investigated the properties of pork jerky prepared under various drying conditions. Drying conditions were control ($80^{\circ}C$/210 min), T1 ($55^{\circ}C/60 min\to65^{\circ}C/60 min\to72^{\circ}C/90 min$), and T2 ($72^{\circ}C/90 min\to65^{\circ}C/60 min\to55^{\circ}C/60 min$), respectively. Water content and water activity ($a_w$) were the lowest in control, while TBA values were the highest among all groups (p<0.05). CIE $L^*$-value in T1 was significantly (p<0.05) lower than in T2 and CIE $a^*$-value showed significantly (p<0.05) the highest in control. CIE $b^*$-value in T2 were significantly higher (p<0.05) compared to the other treatments. Drying yields of pork jerky showed the lowest values in controls but highest in T2 jerky. In textual profile evaluations, control samples had greater hardness, cohesiveness, gumminess, and chewiness values than the other treatments, but springiness values were the lowest (p<0.05). Controls had significantly (p<0.05) lower scores than the other treatments in all sensorial traits. Total bacterial counts in T2 were the lowest during drying process. Based on our findings, we conclude that T2 conditions provided the most effective drying process.

본 연구는 후지를 이용하여 다양한 건조방법에 의해 제조된 육포의 품질특성을 측정하여 가장 적합하고 안전하게 섭취할 수 있는 육포의 제조조건을 확립하기 위해 실시하였다. 대조구가 다른 처리구들에 비해 유의적으로 낮은 수분함량 및 수분활성도와 높은 TBA값을 나타내었다. 또한, 건조조건에 따른 육포의 색도를 비교한 결과, 명도(lightness)를 나타내는 $L^*$-값은 T1처리구가 T2처리구에 비하여 유의적으로 낮게 나타났으며, 적색도(redness)를 나타내는 $a^*$-값은 대조구가 다른 처리구에 비하여 가장 높게 나타났고, 황색도(yellowness)를 나타내는 $b^*$-값은 T2처리구가 유의적으로 높은 값을 보였다. 건조수율 측정 결과, T2처리구가 가장 높은 수율을 나타내어(p<0.05), 최종제품의 수율 측면에서는 T2처리구의 건조방법이 가장 효과적인 건조방법으로 사료되었다. 각 육포의 물성측정 결과, 대조구가 다른 처리구들에 비해 가장 높은 hardness, cohesiveness, gumminess, chewiness값과 가장 낮은 springiness값을 나타내었으며(p<0.05), 관능평가에서는 대조구가 모든 항목에서 유의적으로 낮은 평가를 받았다. 육포의 건조단계별 총균수의 변화를 비교한 결과, T2처리구가 건조초기와 후기에 가장 적은 총균수를 나타내었으며, 각 처리구별 최종 육포제품의 총균수는 $10^3$ CFU/g 미만이었다. 이상의 결과를 종합하여 볼 때, 초기에 고온으로 처리한 후 단계적으로 온도를 저하시킨 T2처리구의 건조방법이 가장 효과적인 것으로 사료된다.

Keywords

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