γ射线辐照玉米秸秆预处理对酶解产糖的影响  

Effect of γ-rays radiation pretreatment on enzymatic hydrolysis of corn straw for producing sugar

作　　者：唐洪涛[1,2] 哈益明[1,2] 王锋[1,2] 

机构地区：[1]中国农业科学院农产品加工研究所,北京100193 [2]农业部农产品加工与质量控制重点开放实验室,北京100193

出　　处：《辐射研究与辐射工艺学报》2011年第5期307-313,共7页Journal of Radiation Research and Radiation Processing

基　　金：国防科工局核能开发科研项目(20091228);农业部公益性行业科技专项(200803034)资助

摘　　要：研究了γ射线辐照玉米秸秆预处理对酶解还原糖含量的影响。用DNS法测定还原糖含量,探讨了辐照剂量与还原糖得率之间的关系。结果表明:(1)较高剂量能明显提高玉米秸秆还原糖的含量,经1000 kGy剂量辐照后,还原糖增长率为317.35%。(2)辐照和酶解混合处理有明显的协同效应,粉碎至0.15 mm的秸秆,经1000 kGy剂量辐照后,其还原糖酶解得率为20.51%。(3)辐照后效应对玉米秸秆酶解产糖有明显的影响,以500 kGy剂量辐照的玉米秸秆20 d时达到最大还原糖得率,与初始相比提高了13.68%。The effect of γ-rays radiation pretreatment on enzymatic hydrolysis of corn straw for producing sugar was studied. The relationship between irradiation-dosage and content of reducing sugar was investigated in DNS method. After 1000 kGy irradiation, the content of reducing sugar reached about 317.35%. A synergistic effect between irradiation and enzyme was observed. The reducing sugar yield after enzymatic hydrolysis reached 20.51% when the corn straw powder （0.15 mm） irradiated with a dose of 1 000 kGy. The result shows that the irradiation had significant influence on enzymatic hydrolysis of corn straw. At the 500 kGy preirradiation, compared with initial yield, the maximum sugar yield of sample had increased by 13.68% while the irradiated corn straw stored in 20 days.

关 键 词：玉米秸秆 Γ射线辐照 辐照预处理 

分 类 号：TL99[核科学技术—核技术及应用] TL13