Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effects of Combined Treatment with Ultrasound and Ascorbic Acid on the Storage Qualities of Fresh-cut 'Jonathan'Apples

초음파와 ascorbic acid의 병용처리가 신선절단 '홍옥' 사과의 저장 중 품질에 미치는 영향

  • Jang, Ji-Hyun (Department of Food Science & Technology, Kyungpook National University) ;
  • Moon, Kwang-Deog (Department of Food Science & Technology, Kyungpook National University)
  • Received : 2009.12.29
  • Accepted : 2010.04.02
  • Published : 2010.04.30
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Abstract

The effects of ultrasound treatment, in combination with ascorbic acid, on the quality of fresh-cut 'Jonathan' apples was investigated. Prepared apple slices were ultrasonicated in distilled water (US) or in 1%(w/v) ascorbic acid solution (UA) and the other samples were just dipped in 1%(w/v) ascorbic acid solution (AA). All samples were stored at$10^{\circ}C$ for 12 days. UA-treated samples showed high $L^{*}$ and hue values and low $a^{*}$, $b^{*}$, chroma, and ${\Delta}E$ value. Both control and US-treated samples showed considerable browning. A significant inhibition of polyphenol oxidase activity was observed after UA treatment. The level of total phenolics in UA-treated samples was higher on the day of treatment compared with other samples. Total soluble solids, pH, titratable acidity, and gas concentrations were similar in all samples. This study demonstrated that the simultaneous treatment of ultrasound and ascorbic acid was effective in preventing enzymatic browning of fresh-cut 'Jonathan' apples and maintaining total phenolics contents.

신선절단 '홍옥' 사과의 저장 중 품질에 대한 초음파 및 ascorbic acid의 병용처리의 효과를 조사하였다. 준비한 사과 절편을 초음파 처리(US), ascorbic acid 용액 침지처리(AA), 초음파 및 ascorbic acid 병용 처리(UA) 하였으며 $10^{\circ}C$에서 12일간 저장하였다. UA 처리구에서는 높은 $L^{*}$ 및 hue 값과 낮은 $a^{*}$, $b^{*}$, chroma 및 ${\Delta}E$값이 관찰되었으나 반면 무처리구와 US 처리구에서는 상당한 수준의 갈변이 관찰되었다. UA 처리에 의하여 유의적으로 높은 수준의 polyphenol oxidase 활성 억제가 확인되었으며 처리 당일 UA 처리구에서 다른 처리구에 비해 높은 수준의 총 페놀성 화합물 함량이 측정되었고 모든 처리구에서 총 가용성 고형분 함량, pH, 적정산도 및 포장 내 가스 농도는 큰 차이를 보이지 않았다. 따라서 초음파와 ascorbic acid의 병용처리가 신선절단 '홍옥' 사과의 효소적 갈변억제와 총 페놀성 화합물 함량의 유지에 효과가 있음을 확인하였다.

Keywords

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