가공 전 열처리가 Fresh-cut Mukmelon의 품질변화에 미치는 영향
Influence of Preheating on Quality Changes of Fresh-cut Muskmelon
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참고문헌
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초록
Fresh-cut 멜론의 연화 억제를 위해 열처리를 행하였으며 그에 따른 저장 중 품질 특성과 texture를 조사하였다. 직접적인 열처리에 의한 과실의 품질 열하를 방지하기 위하여 전과(全果, whole fruit)를 저온(50 )에서 열처리 하고 저온(5 )에서 24시간 저장한 후, 멜론 cylinder를 가공하였다. 저장 중의 포장 내 가스 조성의 변화를 통한 호흡특성, 색도 변화, pH, 가용성 고형분 함량 등의 품질 특성 및 texture를 측정하였다. 열처리한 멜론 cylinder의 호흡 특성은 저장 기간이 증가함에 따라 포장 내 산소 함량은 감소하고 이산화탄소 함량은 증가하였다. 특히 무처리구에 비하여 열처리한 멜론 cylinder의 포장내 산소 소비량 및 이산화탄소 발생량이 크게 나타났다. 전과상태에서 저온(50 ) 열처리는 멜론 cylinder의 경도 유지에 크게 영향을 주었으며 저장 6일의 경도에서 열처리 시간에 관계없이 무치리구에 비하여 경도가 크게 나타났다. 특히 50 에서 20분 열처리한 구의 경도가 가장 큰 값을 나타냈다. 열처리 시간에 따른 색도의 차이는 미비하였으나 무처리구에 비하여 색도 변화 정도가 작게 나타났으며 특히 모든 열처리구의 L-value와 chroma value 가 대조구에 비해 높게 나타났다. 또한 50 에서 20분 열처리 하여 가공한 멜론 cylinder의 pH와 가용성 고형분 함량이 저장 기간의 경과에도 유지되었으며 품질 변화가 가장 작게 나타났다.
Abstract
Whole muskmelon was blanched at 50℃ water for inhibition decline of fresh-cut melon quality from direct heat treatment. The muskmelon, after storage at 5℃ for 24 hours, was processed to melon cylinders with 2 ㎝ diameter. The changes of color, texture and the quality characteristics such as gas composition. soluble solid content, pH during storage at 5℃ were measured. Degree of oxygen contents decreased and that of carbon dioxide in melon cylinder increased during storage. Especially, changes of gas composition inside packages appeared high level cor in blanched melon cylinders than non-treatment melons. Blanching with whole fruits at 50℃ had effects on hardness in melon cylinder. Blanched melon, without regard on branching time, appeared higher hardness value than that of non-blanched melon at 6 days storage. There were slight difference between treatment on melon cylinder color. Degrees of change in soluble solid contents and pH on melon cylinder blanched at 50℃ for 20minuets were lower than that of other treatments. In consequence, blanching with whole fruit at 50℃ for 20minuets, before minimal processing, was effective in preserving of texture and quality of melon cylinder during storage.
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