Antioxidant and radioprotective properties of commercially grown litchi (Litchi chinensis) from India

In an earlier study, radiation treatment (0.5 kGy) and low temperature (4 °C) storage were found to extend the shelf life of litchi fruit var. ‘Shahi’ and ‘China’ from India up to 28 days, while maintaining its physical, biochemical and organoleptic properties. The current study was aimed to elucidate the antioxidant and radioprotective properties of the litchi fruit, and the effect of radiation processing on these properties. The litchi fruit was found to be significantly rich in antioxidant and radioprotective properties, and the antioxidant parameters were found to be well correlated with the phenolic and flavonoid contents. A significant protection to pBR322 plasmid DNA and Escherichia coli cells from radiation induced damage was observed in the presence of litchi juice. Plasmid DNA was well protected even at the dose of 5 kGy, whereas, bacterial cells could be protected up to 0.5 kGy. Neither of these properties was found to be sensitive to radiation processing or low temperature storage.     

CANDU-6型重水堆生产~(60)Co技术研究

从堆芯核设计、调节棒组件结构设计及安全分析等方面,论证了CANDU-6(CANadian Deuterium Uranium reactor)型重水反应堆反应性控制系统用钴调节棒组件代替不锈钢调节棒组件后,具有与原不锈钢调节棒组件相同的功能,即钴调节棒组件结构分类、堆内布置和运行方式与不锈钢调节棒组件相同,并且堆芯物理特性保持不变,也能确保堆芯安全运行及产钴过程中的辐射安全。