辐照对核桃果实冷藏生理与品质的影响.pdf
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228 2016, Vol.37, No.20 食品科学 ※包装贮运
辐照对核桃果实冷藏生理与品质的影响
1 1 1,* 1 2
董 慧 ,鲁周民 ,马艳萍 ,胡海超 ,马惠玲
(1.西北农林科技大学林学院,陕西 杨凌 712100 ;2.西北农林科技大学生命科学学院,陕西 杨凌 712100 )
摘 要: 2 0 0.1 0.3 0.5 1.0 kGy不同剂量60Coγ射线辐照处理后,
以‘辽核 号’核桃果实为材料,经 (对照)、 、 、 、
采用青皮果实60 d 1
+脱皮鲜坚果30 d两步法贮藏于(0 ± )℃的冷库中,监测其在贮藏期间色差、褐变指数、裂果
率、乙烯释放量、气体成分、蛋白质含量、脂肪含量、脂肪酸含量、过氧化值与羰基价的变化。结果表明,辐照处
理显著降低了核桃果实贮藏期间的裂果率和乙烯峰值,保持了较低的过氧化值和羰基价,延缓了脂肪氧化速度;
0.3 kGy和0.5 kGy处理的感官品质较好,以0.3 kGy延缓核桃果实衰老的作用突出。该剂量条件下核桃果实裂果率和
乙烯峰值最低,必需脂肪酸总量维持在较高水平,贮藏末期脂肪含量最高,过氧化值最低,确定0.3 kGy为核桃果
实冷藏适宜辐照剂量。
关键词:核桃果实;辐照;冷藏;生理;品质
Effects of Irradiation on Postharvest Physiology and Quality in Walnut Fruit during Cold Storage
1 1 1,* 1 2
DONG Hui , LU Zhoumin , MA Yanping , HU Haichao , MA Huiling
(1. College of Forestry, Northwest AF University, Yangling 712100, China;
2. College of Life Science, Northwest AF University, Yangling 712100, China)
Abstract: The green walnut fruits of the cultivar Liaohe No. 2 were subjected to 60Coγ-ray irradiation at 0, 0.1, 0.3, 0.5
and 1.0 kGy, respectively, and then stored at (0 ± 1) ℃ for 60 days firstly and then for another 30 days after the removal of
green husk. Changes in color parameters, browning index, cracking rate, ethylene production, gas composition, the contents
of protein, fat and fatty acids, peroxide value and carbonyl value were monitored during storage. The results
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