Changes in the arabinoxylan fraction of wheat grain during alcohol production.
Changes in the arabinoxylan fraction of wheat grain during alcohol production.
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DOI：
10.1016/j.foodchem.2016.10.109
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发表时间：
2017-04-15
期刊：
影响因子：
8.8
通讯作者：
Lovegrove, Alison
中科院分区：
文献类型：
--
作者：
Kosik, Ondrej;Powers, Stephen J.;Chatzifragkou, Afroditi;Prabhakumari, Parvathy Chandran;Charalampopoulos, Dimitris;Hess, Linde;Brosnan, James;Shewry, Peter R.;Lovegrove, Alison
在商业和实验室酒精生产后测定小麦籽粒中的AX。实验室规模生产的样品与商业加工的样品相似。加工过程中AX的浓度、溶解度和动力粘度均增加。DDGS中的AX在组成和性质上的变化小于全谷物中的AX。DDGS具有为新产品提供AX来源的潜力。将实验室生产的DDGS样品与来自酿酒厂和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、溶解性和含量的变化。与起始材料相比，蒸馏过程导致AX含量相对增加。DDGS生产中涉及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的产生导致AX的结构变化。2-和3-连接的阿拉伯糖低聚糖减少，与起始谷物相比，这导致DDGS中的阿拉伯糖基化减少约50%。当前的研究表明，实验室规模的DDGS可以准确代表商业规模，并且无论起始材料如何，DDGS的AX组成始终均匀。DDGS和稀酒糟的均匀性使它们成为用于生产益生元或其他新产品的AX的良好潜在来源。
AX was determined in wheat grain after commercial and laboratory alcohol production. Samples from laboratory scale production were similar to those from commercial processing. The concentration, solubility and dynamic viscosity of AX increased during processing. AX in DDGS was less variable in composition and properties than that in whole grain. DDGS has potential to provide a source of AX for novel products. 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.
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