Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effects of Ultrasound and Ascorbic acid Cotreatment on Browning of Fresh-cut 'Tsugaru' Apples

초음파 및 Ascorbic acid 병용처리가 신선절단 '쓰가루' 사과의 갈변에 미치는 영향

  • Received : 2012.01.05
  • Accepted : 2012.04.27
  • Published : 2012.06.30
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Abstract

The effects of ultrasound and ascorbic acid cotreatment on the browning inhibition and microbial growth of fresh-cut Tsugaru apples were investigated. The prepared samples were dipped in distilled water (Cont) or 1% (w/v) ascorbic acid solution (AA) and were then ultrasonicated in distilled water (US) or 1% (w/v) ascorbic acid solution (AA+US). The samples were then packed in a 0.04mm polypropylene bag ($20{\times}15$ cm) and were stored at $10^{\circ}C$ for eight days. The AA+US treated samples showed high $L^*$ and low $a^*$, $b^*$ values as well as inactivated PPO activity. The growth of the total aerobic bacteria also inhibited the AA+US treated samples more. The physicochemical properties were not different among all the samples. It was demonstrated in this paper that the ultrasonication treatment with ascorbic acid prevented the enzymatic browning of and microbial growth in fresh-cut Tsugaru apples.

신선절단 '쓰가루' 사과의 갈변과 미생물 성장 저해에 대해 ascorbic acid와 초음파 처리의 효과를 조사하였다. 사과를 8조각으로 자르고, 1분간 증류수에 침지(Cont), 1분 동안 1% ascorbic acid에 침지(AA), 1분 동안 초음파 처리(US), 또는 1분 동안 1% ascorbic acid용액으로 초음파 처리(AA+US) 후 0.04 mm polypropylnene film으로 열접합 포장하고, 8일 동안 $10^{\circ}C$에서 저장하면서 품질 변화를 분석하였다. AA+US 처리구에서 저장 마지막 날까지 가장 높은 $L^*$값과 낮은 $a^*$, $b^*$값을 보였고, polyphonoloxidase 활성 또한 가장 억제 된 것으로 나타났다. 총균수의 변화는 저장 초기부터 마지막 날까지 AA+US 처리구에서 미생물 성장이 가장 저해된 것으로 나타났다. 가용성 고형분 함량, 적정산도 및 pH 등은 처리조건에 따른 큰 차이를 보이지 않았다. 따라서 ascorbic acid와 초음파의 병용 처리는 신선 절단 사과의 효소적 갈변을 억제하고, 미생물 성장을 저해하는 효과를 가지는 것으로 확인되었다.

Keywords

References

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