虫草头孢菌粉辐照灭菌及对其主要成分的影响

研究了60 Co γ射线辐照虫草头孢菌粉的灭菌效果及对其主要营养成分的影响。结果表明 ,辐照可有效地杀灭菌粉中的杂菌和霉菌 ,随着辐照剂量的增加菌粉中的含菌量呈同步下降。杂菌和霉菌的D10 值分别为 5 .5 1kGy和 5 .72kGy。经 8～ 9kGy辐照处理的菌粉 ,其主要功能成分 (腺苷、甘露醇、氮含量 )及其它成分脂肪酸、蛋白质、总糖、游离总氨基酸无显著影响 ,其维生素C和E的含量分别下降 8.4 %～ 9.5 %和 2 9.6 %～ 33.3%。辐照灭菌后的头孢菌粉有较好的耐贮藏性 ,保质期延长。

虫草菌丝粉辐照灭菌研究

In this paper, radiation decontamination effects of mycelium powder of sinensis with Co γ-rays and influ- 60 ence on its components were studied. The results showed that the irradiation was very effective in killing bacteria and moulds in mycelium powder. The D10 value for bacteria and moulds were 5.51kGy and 5.72kGy respectively. The optimum dose for decontamination of mycelium powder was 8—9kGy. Irradiating the mycelium powder to 8—9kGy did not cause obvious changes in the content of fatty acid, protein, total polysaccharide, total free amino acid and major nutrient components of adenosine, mannitol, and nitrogen. The irradiated mycelium powder, lost respectively 8.4%—9.5% and 29.6%—33.3% vitamin C and E, but they are minor nutrient components. After radiation decontamination, the quality-guaranteed mycelium powder has extended shelf life.