Kosik Ondrej, Powers Stephen J, Chatzifragkou Afroditi, Prabhakumari Parvathy Chandran, Charalampopoulos Dimitris, Hess Linde, Brosnan James, Shewry Peter R, Lovegrove Alison
Department of Plant Biology and Crop Science, Rothamsted Research, Harpenden AL5 2JQ, Hertfordshire, UK.
Department of Computational and System Biology, Rothamsted Research, Harpenden AL5 2JQ, Hertfordshire, UK.
Food Chem. 2017 Apr 15;221:1754-1762. doi: 10.1016/j.foodchem.2016.10.109. Epub 2016 Oct 24.
Laboratory produced DDGS samples were compared with commercial samples from a distillery and a biofuel plant. Changes in structure, solubility and content of arabinoxylan (AX) was determined. The distillation process results in a relative increase of AX content compared to the starting material. The heating and drying processes involved in the production of DDGS lead to an increased solubility and viscosity of water-extractable AX. Production of DDGS results in structural changes to the AX. There is a decrease in 2- and 3-linked arabinose oligosaccharides, that contributes to around a 50% reduction in arabinosylation in DDGS compared with the starting grains. The current study shows that laboratory-scale DDGS provide an accurate representation of the commercial scale and that the AX composition of DDGS is consistently uniform irrespective of starting material. The uniformity of DDGS and thin stillage makes them a good potential source of AX for production of prebiotics or other novel products.
将实验室制备的DDGS样品与来自一家酿酒厂和一家生物燃料厂的商业样品进行了比较。测定了阿拉伯木聚糖（AX）的结构、溶解性和含量变化。与起始原料相比，蒸馏过程导致AX含量相对增加。DDGS生产过程中的加热和干燥过程导致水可提取AX的溶解度和粘度增加。DDGS的生产导致AX的结构发生变化。2-和3-连接的阿拉伯糖寡糖减少，这使得DDGS中的阿拉伯糖基化比起始谷物减少了约50%。当前研究表明，实验室规模的DDGS能准确代表商业规模，并且无论起始原料如何，DDGS的AX组成始终保持一致。DDGS和稀酒糟的均匀性使其成为生产益生元或其他新产品的AX的良好潜在来源。
