Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA.
Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; Joint Institute of Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
Bioresour Technol. 2018 Dec;269:567-570. doi: 10.1016/j.biortech.2018.08.034. Epub 2018 Aug 11.
This work describes the structural characterization of hemicellulose isolated from hydroponically grown switchgrass in HO medium (protiated) or 50% DO medium (deuterated) through compositional analysis, GPC, FTIR, C and H/C HSQC NMR. 4-O-methyl glucuronoarabinoxylan (GAX), the major hemicellulose in switchgrass isolated from deuterated switchgrass, had structural properties similar to hemicellulose isolated from protiated switchgrass. Both had comparable arabinose to xylose ratio (0.25) and molecular weight (47-50 kDa). Structural similarities show that deuterated switchgrass hemicellulose can be used as a model carbohydrate polymer in neutron scattering, or pharmaceutical studies due to their immunomodulatory activity and gastroprotective effects.
这项工作描述了通过组成分析、GPC、FTIR、C 和 H/C HSQC NMR 从 HO 介质（质子化）或 50% DO 介质（氘化）中生长的水培柳枝稷中分离出的半纤维素的结构特征。4-O-甲基葡萄糖醛酸阿拉伯木聚糖（GAX）是从氘化柳枝稷中分离出的主要半纤维素，其结构特性与从质子化柳枝稷中分离出的半纤维素相似。两者的阿拉伯糖与木糖的比例（0.25）和分子量（47-50 kDa）都相当。结构相似表明，由于具有免疫调节活性和胃保护作用，氘化柳枝稷半纤维素可用作中子散射或药物研究中的模型碳水化合物聚合物。
