Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

Browning and Quality Changes of Fresh-cut Iceberg Lettuce by Gas Flushing Packagings

가스충전 포장에 따른 신선편이 결구상추의 갈변 및 품질 특성

Jung, Joo-Yeoun;Shin, Se-Hee;Choi, Jeong-Hee;Jeong, Moon-Cheol
정주연;신세희;최정희;정문철

  • Published : 20081200
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Abstract

This study was undertaken to evaluate the effect of gas flushing packaging (CO2:O2=10:5, 25:20 and 50:20) on the quality of fresh-cut iceberg lettuce (Lactuca sativa) by analyzing gas composition, phenylalanine ammonia-lyase, polyphenol oxidase, browning index, firmness and sensory evaluation during storage at 5℃ with control (CO2:O2=0:21) packaged with OPP (oriented polypropylene) film. Concentration of carbon dioxide in control was increased by 4.5% than initial day after 10 days of storage, however that of gas flushing packaging (10:5) was slightly increased to 11.3%. PAL, PPO activity and browning index of gas flushing packaging were lower than control and had an effect on preventing browning of iceberg lettuce. Packaging (25:20 and 50:20) showed lower firmness for injures by high concentration of carbon dioxide on 4 days of storage. Control showed the browning of cutting parts from 2 days and reached marketable limit on 4 days. Gas flushing packaging (10:5) reached marketable limit for browning of cutting part and softening of texture on 20 days but led to extend the shelf-life of fresh-cut iceberg lettuce longer than the control.

신선편이 결구상추의 가스충전포장 시 가스조성이 품질에 미치는 영향을 조사하기 위하여 CO2:O2의 비율을 10:5, 25:20, 50:20 등의 농도로 OPP포장지에 가스충전 포장한 결구상추를 0:21의 대조구와 함께 5℃에 저장하면서, 포장지내의 CO2농도, PAL, PPO활성, 갈변도, 경도 및 관능특성의 변화를 조사하였다. 각 포장방법별 포장지내의 CO2농도는 대조구에서 저장말기인 20일경 약 110% 증가한 반면 10:5의 가스충전포장에서는 약 8.32%가 증가율로서 신선편이 결구상추의 호흡률을 억제하는 효과가 있었다. 가스충전포장은 저장 중 PAL활성, PPO활성 및 갈변도의 변화를 대조구보다 억제하는 효과가 뚜렷하여 가스충전포장의 갈변억제 효과를 인식할 수 있었다. 25:20과 50:20의 포장에서는 고탄산가스 장해현상이 발생하여 저장 4일경부터 급격한 경도저하 현상이 나타났으며, 대조구에서는 저장 2일부터 절단면에서의 발생한 갈변현상으로 저장 4일경 상품한계치에 도달한 반면 10:5의 포장에서는 저장 20일경 부분적인 조직연화현상과 갈변으로 저장수명한계치에 도달하여, 대조구보다 결구상추의 신선도 연장효과가 높은 것으로 나타났다.

Keywords

References

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