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감마선 조사와 저장온도에 따른 사과의 기능성 성분 및 조직감 변화

Changes of Functional Compounds in, and Texture Characteristics of Apples during Post-Irradiation Storage at Different Temperatures

김동호|정진우|양수형|허정무|임상용|윤혜정
한국식품저장유통학회 (The Korean Society of Food Preservation)|2007.06|Food Science and Preservation|제14권 제3호|pp. 239-246

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참고문헌

키워드

physiological activityapplegamma irradiationstorage qualityphysiochemical property
주제분류식품과학

초록

사과의 유통에서 내외부 품질특성 및 외부 오염원으로부터의 안전성 확보를 위한 연구의 일환으로 사과에 감마선 조사를 실시하여 각각 4℃와 25℃에 저장하면서 사과의 생리화학적 및 물리적 품질특성을 살펴보았다. 연구 결과 영양 성분 및 기능성 성분의 손실이나 품질저하는 보존 온도에 의하여 결정되었고 감마선 조사에 의한 영향은 거의 나타나지 않았다. 또한 중량변화와 기계적 물성 특성 또한 감마선 조사에 의하여 영향을 받지 않았다. 색도와 관능특성은 상온 보관시 감마선 조사 시험구에서 다소간의 품질 열화가 관찰되었으나 저온보존에서는 대조구와 차이를 나타내지 않았다. 따라서, 감마선 조사는 사과의 영양성분 및 기능성, 그리고 물리적 요인의 보존안정성에 영향을 주지 않으면서도 미생물학적 관점에서의 유통, 보존안정성을 확보할 수 있는 유효한 기술이 될 수 있을 것으로 사료되었다.

Abstract

The effects of gamma irradiation on the physiochemical and physical characteristics of apples were investigated during post-irradiation storage at 4℃ and 25℃. The contents of total and reducing sugars were analyzed and the results indicated that apples receiving 1 kGy of gamma irradiation did not show significant differences in sugar contents compared to non-irradiated controls. Important physiological characteristics were evaluated by measurement of total phenolic content and total flavonoid content, reducing power, and radical scavenging ability, and the results indicated that gamma irradiation at a dose of 1 kGy did not affect physiological activities. Changes in physical parameters such as weight loss, strength, cohesiveness and hardness, during post-irradiation storage, were temperature-dependent, whether the apples were irradiated or not. The color and sensory acceptance of the apples were not affected by irradiation during cold storage. However, minor deterioration in color quality and sensory acceptance of irradiated apples was noted under ambient temperature storage. We conclude that gamma irradiation (1 kGy) does not affect apple nutritional content stability, functional properties, or physical characteristics, especially upon cold storage after radiation treatment.

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