Investigation of changes in the fine structure of sorghum starch in the baijiu fermentation process
文献类型: 外文期刊
第一作者: Yang, Chuantian
作者: Yang, Chuantian;Han, Huaxin;Xiao, Xue;Xu, Chen;Gilbert, Robert G.;Li, Enpeng;Yang, Chuantian;Xiao, Xue;Xu, Chen;Gilbert, Robert G.;Li, Enpeng;Lv, Peng;Han, Huaxin
作者机构: Yangzhou Univ, Coll Agr, Jiangsu Key Lab Crop Genet & Physiol, State Key Lab Hybrid Rice, Yangzhou 225009, Peoples R China;Yangzhou Univ, Jiangsu Coinnovat Ctr Modern Prod Technol Grain Cr, Jiangsu Key Lab Crop Genom & Mol Breeding, Yangzhou 225009, Peoples R China;Hebei Acad Agr & Forestry Sci, Hebei Branch, Inst Millet Crops, China Natl Sorghum Improvement Ctr, Shijiazhuang 050035, Peoples R China;Zhenjiang Inst Agr Sci Hilly Reg Jiangsu Prov, Jurong, Peoples R China
关键词: Baijiu lees; Saccharification power; Starch hydrolysis; Molecular size
期刊名称:FOOD HYDROCOLLOIDS ( 2022影响因子:10.7; 五年影响因子:10.9 )
ISSN: 0268-005X
年卷期: 2024 年 152 卷
收录情况: SCI
摘要: In fermentation to produce the alcoholic liquor baijiu, sorghum starch is the main carbohydrate source, being hydrolyzed and converted into ethanol and aromatics. The mechanisms of starch hydrolysis which affect fermentation quality and efficiency are not fully understood. To investigate this, three sorghum varieties were used as fermentation material, with two fermentation methods. Changes in the amounts of various components and in starch molecular structure in lees (sediment) during fermentation were investigated. The lees from waxy sorghum had higher fermentation rates and saccharification power than those from normal sorghum in the early stage of fermentation, but decreased below those of normal sorghum in the end stage of fermentation, due to increased accumulation of acid, which inhibited enzyme activities, and even stopped fermentation. The chainlength distributions of both amylopectin and amylose in the lees did not show significant changes with fermentation, showing that starch in sorghum grain cannot be hydrolyzed directly, but only by hydrolysis of starch leached from the grain into the water; this is in accord with data from electron micrographs indicating that starch hydrolysis happened in the leachate rather than in the lees. This information can help manufacturers finetune their processes to improve production processes and product.
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