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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Permeability-Controlled Polyethylene Film on Extension of Shelf-life of Brined Baechu Cabbage

투과도 조절 폴리에틸렌 필름의 절임배추 보존기간 연장효과

  • Kim, Young-Wook (Dept. of Food Science and Nutrition, Pusan National University) ;
  • Jeong, Ji-Kang (Dept. of Food Science and Nutrition, Pusan National University) ;
  • Lee, Sun-Mi (Dept. of Food Science and Nutrition, Pusan National University) ;
  • Kang, Soon-Ah (Dept. of Fermented Food Science, Seoul University of Venture & Information) ;
  • Lee, Dong-Sun (Division of Food Science and Biotechnology, Kyungnam University) ;
  • Kim, So-Hee (School of Culinary Art & Baking Technology, Dong Ju College) ;
  • Park, Kun-Young (Dept. of Food Science and Nutrition, Pusan National University)
  • 김영욱 (부산대학교 식품영양학과) ;
  • 정지강 (부산대학교 식품영양학과) ;
  • 이선미 (부산대학교 식품영양학과) ;
  • 강순아 (서울벤처정보대학원대학교 발효식품과학과) ;
  • 이동선 (경남대학교 식품생명학과) ;
  • 김소희 (동주대학 외식조리영양계열) ;
  • 박건영 (부산대학교 식품영양학과)
  • Published : 2009.12.31
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Abstract

Brined Baechu cabbages were packed with different films of high density polyethylene (HDPE), aluminium polyethylene (Al/PE), nylon polyamide (Ny/PE), low density polyethylene (LDPE) and permeability-controlled polyethylene (Mirafresh (MF), US patent No. 5972815), and then stored at 4${^{\circ}C}$ for 4 weeks. Changes in quality characteristics of pH, acidity, total bacteria counts, lactic acid bacteria counts, E. coli counts, texture and $O_2$ concentration were determined during the storage. The pH of brined Baechu cabbage packed with Mirafresh (MF) film was 6.25 after 4 weeks from initial pH of 6.80. The acidity of all brined Baechu cabbages increased, however, the increase of the cabbage in MF was the lowest. The levels of total bacteria, lactic acid bacteria and E. coli in the cabbages packed with MF were also lower than the other films. After 4 weeks, of all brined springiness Baechu cabbages decreased, but MF showed relatively high springiness. The $O_2$ concentrations by its permeation through MF were 0.35%-1.00% at 4-25${^{\circ}C}$ after 1 week. In conclusion, MF was found to be the most effective packaging film for brined Baechu cabbage to extend shelf-life.

절임배추를 각각 다른 5종류의 필름에 sealing 한 다음 4주간 4${^{\circ}C}$로 저장하면서 품질 특성을 평가하였다. 기체투과도 조절 필름인 MF필름(US patent No. 5972815)으로 포장한 절임배추의 경우에는 미생물의 성장수가 가장 적었고 HDPE필름으로 포장한 절임배추의 경우가 미생물수가 가장 많았다. MF필름으로 포장한 절임배추의 경우 다른 필름으로 포장한 절임배추보다 pH가 천천히 감소하였고 산도의 경우에는 모든 필름에서 포장한 절임배추에서 4주 동안 점점 증가하지만 MF필름으로 포장한 절임배추의 산도가 가장 낮았다. MF필름으로 포장한 절임배추의 경우 탄력성의 감소율이 가장 낮았고 HDPE필름으로 포장한 절임배추의 경우에 탄력성의 감소율이 가장 높았다. MF필름에 절임배추를 포장한 경우 포장 필름의 투과성과 절임배추의 호흡에 의해 4${^{\circ}C}$에서 1주 후 필름 안에 $O_2$ 조성이 0.66%로 나타났는데, 이러한 필름 안의 $O_2$ 조성 결과와 미생물수, pH, 산도의 결과를 비교해보면 포장필름 안에 $O_2$ 조성이 1%에 가까울 때 절임배추의 품질특성이 가장 우수하게 유지되었다. 본 연구 결과로 절임배추의 저장성 증진과 품질특성의 유지를 위한 필름으로 MF필름이 가장 적합하였다. 그리고 LDPE필름 역시 MF필름보다는 저장성 증진과 품질특성 유지 면에서 성능은 떨어졌지만 가격 면이나 대중적인 면에서 고려해 보았을 때 LDPE필름의 사용도 가능하다고 하겠다.

Keywords

References

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