60Co-γ射线辐照对“贵长”猕猴桃储藏品质的影响

Effects of 60Co-γ ray irradiation on storage quality of "Guichang" kiwifruit

中文关键词:  辐照  贵长猕猴桃  保鲜  品质

英文关键词:irradiation  "Guichang" kiwifruit  preservation  quality

中文摘要:

      目的 研究不同剂量的60Co-γ射线辐照对“贵长”猕猴桃储藏品质的影响。方法 以60Co-γ射线作为辐照源, 选择不同的辐照剂量对“贵长”猕猴桃样品进行辐照处理, 并在储藏60 d内对样品中的维生素C (vitamin C, VC)含量、可溶性还原糖含量、果实硬度、可溶性固形物含量、可滴定酸含量进行了检测, 并对其气味成分进行了分析。结果 60Co-γ辐照处理会影响“贵长”猕猴桃的储藏品质, 低于4 kGy的辐照处理对样品品质影响相对较小, 而6 kGy以上的辐照剂量会显著地加速样品成熟软化(P<0.05)。辐照处理对“贵长”猕猴桃的气味影响较小, 而硫化物、氮氧化物、芳香烃化合物及烷类是影响“贵长”猕猴桃挥发性气味成分。结论 当辐照剂量为2~4 kGy时, 储藏中“贵长”猕猴桃中VC等营养物质保存较好, 样品成熟老化速度减慢, 具有良好的保鲜效果。

英文摘要:

      Objective To study the effect of different doses of 60Co-γ ray irradiation on the storage quality of "Guichang" kiwifruit. Methods Taking 60Co-γ rays as irradiation sources, different irradiation doses were selected for irradiation treatment of "Guichang" kiwifruit samples. The contents of vitamin C (VC), soluble reducing sugar, fruit hardness, soluble solids and titratable acids in the samples were determined within 60 d of storage, and its odor components were analyzed. Results The 60Co-γ irradiation treatment would affect the storage quality of "Guichang" kiwifruit. The irradiation treatment below 4 kGy had relatively little effect on the sample quality, while the irradiation dose above 6 kGy would significantly accelerate the maturation and softening of the sample (P<0.05). Irradiation treatment had little effect on the odor of "Guichang" kiwifruit, while sulfur compounds, nitrogen oxides, aromatic hydrocarbons and alkanes were the volatile odor components of "Guichang" kiwifruit. Conclusion When the irradiation dose is 2?4 kGy, the nutrients such as VC in the "Guichang" kiwifruit in storage are better preserved, the maturation and aging speed of the sample is slowed down, and it has a good preservation effect.