新收获小麦在储藏过程中面筋聚集特性研究

    Study on Gluten Aggregation Characteristics of Newly Harvested Wheat During Storage

    • 摘要: 新收获小麦具有后熟期,经过后熟期储藏的小麦其品质会有明显的提升。如能找到一种简便、快捷地检测新收获小麦在储藏过程中品质变化的方法,将使新收获小麦的应用得到拓展。面筋峰值仪是一种运用高剪切力原理、快速测定面筋强度、反映面筋聚集特性的仪器。利用面筋峰值仪测定新收获泛麦8号中筋小麦在模拟我国主要的4个储粮区域进行储藏过程中面筋的聚集特性,从而判断小麦的品质变化。结果表明:新收获小麦在短期储藏过程中,峰值形成时间逐渐增长,峰值扭矩变化不大,峰值面积逐渐增大。这表明面筋的形成时间逐渐增长,流变学特性得到提升;面筋延伸抗性增大,延展性降低,面筋强度增大。因此,利用面筋峰值仪可以判断出新收获小麦在储藏过程中品质得到改善,并且在华中生态区域(28 ℃, RH 75%)储藏至第10周左右时面筋的聚集特性最好,小麦品质达到最佳。

       

      Abstract: The newly harvested wheat has a distinct post-maturing period, and its quality will be significantly improved after storage in the post-maturing period. The purpose of this study was to find a simple and quick way to detect the quality changes during the storage of newly harvested wheat, and to expand the application of newly harvested wheat. GlutoPeak is an instrument that uses the principle of high shear force to quickly measure gluten strength and reflect gluten aggregation characteristics. Therefore, the method used in this paper was to use the GlutoPeak to determine the aggregation characteristics of gluten in the storage process of the newly harvested Fanmai 8 medium gluten wheat, which was planted in the simulated four main grain storage areas in China, so as to judge the quality changes of wheat. The results showed that during the short-term storage, Peak Maximum Time (PMT) provided by the GlutoPeak gradually increased; Torque Maximum (BEM) did not change much; Energy to Maximum Time (EnMT) gradually increased. This indicated that the aggregation time of the gluten gradually increased, and the rheological properties were improved; the resistance of the dough tendon increased, the extension was lowered, and the gluten strength was improved. Therefore, it was concluded that the GlutoPeak could be used to judge the quality of the newly harvested wheat during storage; and the gluten aggregation characteristics were the best when stored in the simulated Central China ecological region (28 ℃, 75% RH) until the 10th week. At the same time, the quality was the best.

       

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