Effect of various aromatic compounds with different functional groups on enzymatic hydrolysis of microcrystalline cellulose and alkaline pretreated wheat straw

IF 20.2 Q1 MATERIALS SCIENCE, PAPER & WOOD Journal of Bioresources and Bioproducts Pub Date : 2023-12-26 DOI:10.1016/j.jobab.2023.12.006
Yufeng Yuan , Xinyu Guo , Bo Jiang , Wenjuan Wu , Tingwei Zhang , Michael Sweeney , Mehraj Ahmad , Yongcan Jin
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Abstract

Low molecular aromatic compounds are detrimental to the enzymatic hydrolysis of lignocellulose. However, the specific role of their functional groups remains unclear. Here, a series of nine aromatic compounds as additives were tested to understand their effect on the hydrolysis yield of microcrystalline cellulose (MCC) and alkaline pretreated wheat straw. Based on the results, the inhibition of aldehyde groups on MCC was greater than that of carboxyl groups, whereas for the alkaline pretreated wheat straw case, the inhibitory effect of aldehyde groups was lower than that of carboxyl groups. Increased methoxyl groups of aromatic compounds reduced the inhibitory effect on enzymatic hydrolysis of both substrates. Stronger inhibition of aromatic compounds on MCC hydrolysis was detected in comparison with the alkaline pretreated wheat straw, indicating that the substrate lignin can offset the inhibition to a certain extent. Among all aromatic compounds, syringaldehyde with one aldehyde group and two methoxyl groups improved the glucan conversion of the alkaline pretreated wheat straw.

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具有不同官能团的各种芳香族化合物对微晶纤维素和碱性预处理小麦秸秆酶水解的影响
低分子芳香族化合物不利于木质纤维素的酶水解。然而,其官能团的具体作用仍不清楚。在此,我们测试了一系列作为添加剂的九种芳香族化合物,以了解它们对微晶纤维素(MCC)和碱性预处理小麦秸秆水解产率的影响。结果表明,醛基对微晶纤维素的抑制作用大于羧基,而对于碱性预处理小麦秸秆,醛基的抑制作用低于羧基。芳香族化合物甲氧基的增加降低了对两种底物酶水解的抑制作用。与碱性预处理的小麦秸秆相比,芳香族化合物对 MCC 水解的抑制作用更强,这表明底物木质素能在一定程度上抵消抑制作用。在所有芳香族化合物中,含有一个醛基和两个甲氧基的丁香醛提高了碱性预处理小麦秸秆的葡聚糖转化率。
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来源期刊
Journal of Bioresources and Bioproducts
Journal of Bioresources and Bioproducts Agricultural and Biological Sciences-Forestry
CiteScore
39.30
自引率
0.00%
发文量
38
审稿时长
12 weeks
期刊最新文献
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