Jenjob Apichai, Uthairatanakij Apiradee, Jitareerat Pongphen, Wongs-Aree Chalermchai, Aiamla-Or Sukanya
Division of Postharvest Technology School of Bioresources and Technology King Mongkut's University of Technology Thonburi Bangkok Thailand.
Learning park King Mongkut's University of Technology Thonburi Ratchaburi Thailand.
Food Sci Nutr. 2017 Jun 30;5(5):997-1003. doi: 10.1002/fsn3.485. eCollection 2017 Sep.
Gamma irradiation is used as a phytosanitary treatment for tropical fresh fruit from some producing countries. An experiment was carried out to study the effect of gamma irradiation and season of harvest on the quality 'Pattavia' pineapple fruit. Fruit harvested in the summer and the rainy cool (winter) seasons were exposed to gamma radiation at dose levels of 0 and 400-600 Gy from a 60 Cobalt source and the fruit stored at 13°C and 90% RH for up to 21 days. Gamma irradiation did not affect the ratio of TSS/TA, antioxidant content, or ascorbic acid concentration. However, gamma irradiation did delay color development and also induced internal browning over 50% of flesh discolored in fruit stored for 14 days, especially harvested winter fruit. Moreover, harvesting fruit in different seasons had a significant effect on fruit quality after harvest and during stimulated sea shipment storage. The result showed that gamma irradiation can be used as a phytosanitary treatment with minor changes in eating quality. However, the internal browning was greater if fruit were stored longer than 1 week at 13°C.
伽马射线辐照被用作一些生产国热带新鲜水果的植物检疫处理方法。开展了一项实验，以研究伽马射线辐照和收获季节对“帕塔维亚”菠萝果实品质的影响。夏季和雨季凉爽（冬季）收获的果实，接受来自钴-60源剂量为0和400 - 600戈瑞的伽马射线辐照，果实贮藏于13°C、相对湿度90%的环境中长达21天。伽马射线辐照不影响总可溶性固形物/可滴定酸比值、抗氧化剂含量或抗坏血酸浓度。然而，伽马射线辐照确实延缓了果实颜色的变化，并且在贮藏14天的果实中，超过50%的果肉变色出现内部褐变，尤其是冬季收获的果实。此外，在不同季节收获果实，对采后及模拟海运贮藏期间的果实品质有显著影响。结果表明，伽马射线辐照可作为一种植物检疫处理方法，对食用品质的影响较小。然而，如果果实在13°C下贮藏超过1周，内部褐变会更严重。
