Laboratory of Natural Compounds Chemistry and Bioanalytics, Core Facility Center "Arktika", Northern (Arctic) Federal University named after M.V. Lomonosov, Northern Dvina Emb., 17, Arkhangelsk 163002, Russia.
J Agric Food Chem. 2022 May 4;70(17):5458-5459. doi: 10.1021/acs.jafc.1c04166. Epub 2022 Apr 20.
This paper presents comments on the recently published article by Lahtinen et al., showing results about study the chemical structure of insoluble residual lignin, the presence of fatty acids in kraft lignin, and the origin of the secoisolariciresinol fragment. The analytical procedures used in the study seem to be reliable. However, in my opinion, the authors made mistakes when interpreting the heteronuclear single-quantum correlation (HSQC) nuclear magnetic resonance data; therefore, their conclusions require discussion. Here, an alternative interpretation of some of the results is proposed. In my opinion, the identification of lignin structural fragments from the literature data is a critical step for many studies. Therefore, the introduction of criteria for evaluating the accuracy of identification of lignin structural fragments according to HSQC spectra will significantly affect the scientific context of the structural correctness of subsequent studies of the lignin structure.
这篇论文对拉赫蒂宁等人最近发表的文章提出了评论，该文章展示了关于研究不溶性残余木质素的化学结构、木质素中脂肪酸的存在以及落叶松脂素片段来源的结果。研究中使用的分析程序似乎是可靠的。然而，在我看来，作者在解释异核单量子相关（HSQC）核磁共振数据时犯了错误；因此，他们的结论需要讨论。在这里，提出了对部分结果的另一种解释。在我看来，从文献数据中鉴定木质素结构片段是许多研究的关键步骤。因此，根据 HSQC 谱引入评估木质素结构片段识别准确性的标准，将显著影响随后对木质素结构进行研究的结构正确性的科学背景。
