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本文研究了辐照对螺旋藻的杀菌效果。螺旋藻经7kGy辐照处理后,总带菌量(包括细菌和霉菌)可从初始值105CFU/g数量级水平迅速降至低于102CFU/g,大肠杆菌降为0。辐照后4个月的室温储藏也能保持较高的卫生质量。经同样辐照剂量处理后于37℃、85%RH条件下储藏4周,发现水活度为0.81的样品中微生物(细菌和霉菌)繁殖速度要远大于水活度为0.72和0.66的样品,可见辐照灭菌时较低的水活度是一个关键因素。
This article studies the germicidal effect of irradiation on Spirulina. Spirulina after 7kGy irradiation, the total carrying capacity (including bacteria and mold) from the initial value of 105CFU / g rapidly decreased to levels below 102CFU / g, E. coli reduced to zero. Room temperature storage for 4 months after irradiation also maintains a high hygienic quality. After treated with the same radiation dose for 4 weeks at 37 ° C and 85% RH, the rate of microbial (bacteria and mold) growth in samples with a water activity of 0.81 was found to be much higher than those with water activities of 0.72 and 0.66, Visible radiation sterilization of lower water activity is a key factor.