Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effects of pre-heat treatments on the quality of cut kimchi cabbages during short-term storage

절단배추의 단기 저장에 대한 예열처리 효과

  • Received : 2014.09.01
  • Accepted : 2014.09.29
  • Published : 2014.12.30
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Abstract

Kimchi cabbages were cut ($3{\times}3cm$), and were pre-heat treated at $40^{\circ}C$, and their physicochemical qualities and browning degrees were investigated during 8 weeks storage at $5^{\circ}C$. The Cut kimchi cabbages were treated at $40^{\circ}C$ (1~8 hrs) and their protein bands profiles were determined by sodium dodecyl sulfate polyacrylamide electrophoresis (SDS-PAGE). The 60, 39, 33, and 12 kDa bands considered heat shock proteins (HSPs) were expressed in the cut kimchi cabbage, and the 4-hr pre-heat treatment (HS 4) exhibited the strongest band ratio. The weight ratios and titratable acidities of the pre-heat treated cut kimchi cabbages were not changed so much after 8 weeks storage at $5^{\circ}C$, and the soluble solid contents of HS 4 decreased less than that of any other treatments. The browning degree of HS 4 after 8 week storage was also shown to be the least among the treatments. The polyphenol oxidase (PPO) activities of all treatments slightly rose during the over all storage period, in contrast with the decrease of total phenolic contents. The expression of HSPs was identified in the pre-heat treated cut kimchi cabbages, and HS 4 exhibited the best quality and appearance after 8 weeks storage at $5^{\circ}C$.

절단 배추를 예열처리하고 LDPE 필름 포장하여 단기저장하면서 이화학적인 품질특성과 갈변도를 조사하였다. $40^{\circ}C$에서 1, 2, 4, 8시간동안 예열처리한 후 SDS-PAGE 법으로 단백질 밴드를 조사한 결과, 예열처리구에서 대조구에 비하여 HSP 밴드로 추정되는 60, 39, 33, 12 kDa 밴드가 강하게 나타났으며, 이 중 4시간 예열처리구(HS 4)가 가장 발현율이 높았으며 중량감소율도 적었다. 8주 동안 저장 중 예열처리한 절단배추의 중량감소율 및 적정산도는 거의 변화가 없었으며, 가용성 고형분 함량은 4시간 예열처리구가 가장 적게 감소하였다. 갈변도는 HS 4가 가장 적었다(Con>HS 1>HS 8>HS 2>HS 4, p<0.05). PPO활성은 저장 중 모든 구에서 지속적으로 증가하였으며, HS 4가 가장 낮았고 총페놀성 화합물은 모든 처리구에서 유사하게 감소하였다. 예열처리한 절단배추에서 HSP 밴드의 발현을 확인하였으며, 4시간 예열처리구의 단기 저장 효과가 가장 좋았다.

Keywords

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