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Effect of Packaging Methods on the Quality Properties of Stick Type Restructured Jerky

재구성 스틱형 육포의 포장방법이 저장중 품질특성에 미치는 영향

  • Choi, Yun-Sang (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) ;
  • Han, Doo-Jeong (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-Ai (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • 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)
  • 최윤상 (건국대학교 축산식품생물공학) ;
  • 정종연 (건국대학교 축산식품생물공학) ;
  • 최지훈 (건국대학교 축산식품생물공학) ;
  • 한두정 (건국대학교 축산식품생물공학) ;
  • 김학연 (건국대학교 축산식품생물공학) ;
  • 이미애 (건국대학교 축산식품생물공학) ;
  • 백현동 (건국대학교 축산식품생물공학) ;
  • 김천제 (건국대학교 축산식품생물공학)
  • Published : 2007.09.30

Abstract

The effect of packaging methods on the quality of stick type restructured jerky was investigated in terms of pH, water activity $(A_w)$, TBA (thiobarbituric acid) value, total bacterial counts, and sensory evaluation during storage at room temperature $(25^{\circ}C)$ for 90 days. The jerky was subjected to plastic or vacuum packaging at $(25^{\circ}C)$. The pH decreased slightly as storage time increased (p<0.05), but there were no significant differences between the packaging methods. The water activity of jerky in plastic packaging decreased as storage time increased (p<0.05), however jerky in vacuum packaging showed no significant change. Vacuum packaging resulted in a higher water activity value than plastic packaging. The TBA and hardness values decreased as storage time increased (p<0.05), and there were significant differences between packaging methods during the storage period (p<0.05). The total bacterial counts in vacuum packaged jerky were lower than jerky in plastic packaging. The sensory evaluation of each treatment decreased slightly as storage time increased (p<0.05), however there was no significant difference between packaging methods. Based on our findings, we conclude that vacuum packaging provides more effective storage than common packaging of jerky.

재구성 스틱형 육포의 저장 중 안정성 및 저장성 확보를 위하여 육포의 포장 방법 및 저장기간에 따른 pH, 수분활성도, 지방산패도, 경도, 총균수 및 관능검사를 측정하여, 육포의 품질관리에 대한 기초자료를 제공하고자 육포를 제조하여 상온에서 90일간 저장하면서 시료를 분석하였다. pH는 저장기간이 경과함에 따라 감소하였으나 일반포장과 진공포장 사이에는 유의적인 차이가 없었다 수분활성도는 진공포장에서는 저장기간이 경과함에 따라 유의적인 차이가 없었으나 일반포장의 경우는 저장기간이 경과함에 따라 감소하는 경향을 나타내었다. 간장 육포의 TBA 수치는 저장 15일부터 포장방법에 따라 유의적인 차이를 나타내었고 고추장 육포는 저장 30일부터 유의적인 차이를 나타내었다. 경도는 모든 처리구에서 저장기간이 경과함에 따라 증가하였고, 진공포장이 일반포장에 비해 경도의 변화가 적었다. 총균수는 저장기간이 경과함에 따라 증가하였다가 감소하는 경향을 나타냈으며 저장 동안 진공포장을 한 육포가 일반포장에 비해서 총균수가 적게 나타났다. 관능검사 결과도 저장기간이 경과함에 따라 대체적으로 진공포장이 일반포장과 비교하여 높은 점수를 받았지만 유의적인 차이를 나타내지 않았다. 따라서 일반포장은 소량의 공기를 포함하기 때문에 지방산패에 의한 산패취가 발생할 우려가 있어서 식감이 떨어질 수 있으므로 육포의 저장 중 안전성을 확보하기 위해서는 진공포장으로 유통하는 것이 저장성 측면에서 우수할 것으로 사료된다.

Keywords

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