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

Yun, Hye-Jeong (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Lim, Sang-Yong (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Hur, Jung-Mu (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Jeong, Jin-Woo (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Yang, Soo-Hyung (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Kim, Dong-Ho (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Publication Information
Food Science and Preservation / v.14, no.3, 2007 , pp. 239-246 More about this Journal
Abstract
The effects of gamma irradiation on the physiochemical and physical characteristics of apples were investigated during post-irradiation storage at $4^{\circ}C\;and\;25^{\circ}C$. 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.
Keywords
apple; gamma irradiation; physiochemical property; physiological activity; storage quality;
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