Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Effect of Atmospheric Pressure Plasma on the Quality of Commercially Available Sunsik

대기압 플라즈마가 선식의 품질 특성에 미치는 영향

  • Kim, Hyun-Joo (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Woo, Koan Sik (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Jo, Cheorun (Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Science, Seoul National University) ;
  • Lee, Seuk Ki (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Park, Hye Young (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Sim, Eun-Yeong (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Won, Yong-Jae (Central Area Crop Breeding Research Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Lee, Sang-Bok (Central Area Crop Breeding Research Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA) ;
  • Oh, Sea-Kwan (Crop Post-harvest Technology Division, Department of Central Area Crop Science, National Institute of Crop Science, RDA)
  • 김현주 (국립식량과학원 중부작물부 수확후이용과) ;
  • 우관식 (국립식량과학원 중부작물부 수확후이용과) ;
  • 조철훈 (서울대학교 농생명공학부) ;
  • 이석기 (국립식량과학원 중부작물부 수확후이용과) ;
  • 박혜영 (국립식량과학원 중부작물부 수확후이용과) ;
  • 심은영 (국립식량과학원 중부작물부 수확후이용과) ;
  • 원용재 (국립식량과학원 중부작물부 중부작물과) ;
  • 이상복 (국립식량과학원 중부작물부 중부작물과) ;
  • 오세관 (국립식량과학원 중부작물부 수확후이용과)
  • Received : 2016.07.06
  • Accepted : 2016.08.19
  • Published : 2016.10.28
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Abstract

Atmospheric pressure plasma (APP) was applied to examine microbial safety and qualities of commercial Sunsik. APP was generated in a square-shaped plastic container (250 W, 15 kHz, ambient air) and dielectric barrier discharge plasma treatment was applied for periods of 0, 5, 10, and 20 minutes. The total aerobic bacterial count in the control was 4.44 log CFU/g. Under plasma treatment for 20 minutes, Sunsik samples inoculated with Bacillus cereus, B. subtilis, and Escherichia coli O157:H7 resulted in a reduction of bacterial counts by approximately 2.20, 2.22, and 2.52 log CFU/g, respectively. The pH of the sample was found to decrease after APP treatment. Although hunter color $L^*$ of Sunsik increased, $a^*$ and $b^*$ value decreased as a result of APP. Increasing the APP time also enhanced the peroxide value. Further, sensory evaluation revealed that APP decreased color, flavor, taste and overall acceptability. The results of this study indicated that APP treatment improved the microbial quality of Sunsik, although further studies should be conducted to reduce the deterioration of sensory quality induced by APP.

국내 시판 중인 선식의 유통 안전성 확보를 위한 기초 기반연구로 대기압 플라즈마 처리한 선식의 품질 특성 평가를 진행하였다. 본 연구에서 이용한 플라즈마는 컨테이너형 유전격벽 플라즈마로 방전 가스는 공기를 활용하여 0, 5, 10 및 20분 처리하였고 미생물 감균효과, 색도, pH 관능평가를 진행하였다. 일반 호기성 미생물 분석 결과 20분 처리 시 약 1.70 log CFU/g 감소하였으며 B. cereus, B. subtilis 및 E. coli O157:H7을 이용한 접종 시험 결과 각각 2.20, 2.22 및 2.50 log CFU/g 감소하였다. 색도 측정결과 플라즈마 처리에 의해 명도 값은 증가하였으나 적색도 및 황색도는 감소하였다. 플라즈마 처리에 의한 선식의 pH 측정 결과 처리시간에 따라 감소하는 경향을 보였다. 하지만 플라즈마 처리에 의해 단백질 지질산화가 일어나 관능 품질이 저하되는 경향을 보였다. 따라서 공기로 방전된 대기압 플라즈마 기술은 선식의 품질안전성을 개선할 수 있으나, 관능적 품질 특성 개선을 위한 후속연구가 필요하다고 판단된다.

Keywords

References

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