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http://dx.doi.org/10.3746/jkfn.2002.31.1.057

Effects of Gamma Radiation arid Methyl Bromide Fumigation on Quarantine Pest and Quality of Asian Pears  

권중호 (경북대학교 식품공학과 및 농산물가공저장유통기술연구소)
강호진 (경북대학교 식품공학과 및 농산물가공저장유통기술연구소)
조덕조 (경북대학교 식품공학과 및 농산물가공저장유통기술연구소)
정헌식 (경북대학교 식품공학과 및 농산물가공저장유통기술연구소)
권용정 (경북대학교 농생물학과)
변명우 (한국원자력연구소)
최성진 (대구가톨릭대학교)
최종욱 (경북대학교 식품공학과 및 농산물가공저장유통기술연구소)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.31, no.1, 2002 , pp. 57-63 More about this Journal
Abstract
As an alternative to methyl bromide (MeBr) fumigation for the control of quarantine pests of pears (Pyrus pyrifolia cv. Niitaka), the effect of gamma irradiation (0.5~3 kGy) was comparatively investigated. Insects found in the pears were identified Tetranychus urticae Koch and Panonychus ulmi Koch, which were of quarantine importance. These insects were easily destroyed by MeBr even one day after fumigation. Whereas irradiation at 0.5~2 kGy was not enough to reach the mortality, even if 3 kGy showed the same mortality as MeBr after 17 days of treatment. Respiration of pears was stimulated by both increased doses of irradiation and MeBr fumigation. The rates of surface blackening and core browning were accelerated by MeBr rather than higher doses of irradiation. While the changes in flesh firmness and surface color were more apparent in irradiated samples at above 2 kGy than MeBr. There were negligible differences in the contents of titratable acidity, acetaldehyde and ethanol by the treatment conditions except for 3 kGy-irradiated group. Sensory evaluation showed that mere than 1 kGy was the threshold to induce the significant changes in quality of pears.
Keywords
pears; pests; methyl bromide; irradiation; quality;
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