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Structural elucidation of lignin-carbohydrate complexes (LCCs) from Chinese quince (Chaenomeles sinensis) fruit. | LitMetric

AI Article Synopsis

  • The study analyzed lignin-carbohydrate complexes (LCCs) in Chinese quince fruits using three fractionation methods: milled wood lignin (MWL), acetic acid-extracted LCC (LCC-AcOH), and Bjorkman LCC.
  • *Specific tests such as carbohydrate composition analysis and thermal assessment showed that the MWL and LCC-AcOH provided better thermal stability compared to Bjorkman LCC.
  • *The findings revealed structural differences in lignin and carbohydrate content across the fractions, indicating potential chemical bond interactions between lignin and pectin in the fruit, which can inform future applications.

Article Abstract

The lignin-carbohydrate complexes (LCCs) of the mesocarp (MS) and near the endocarp (NE) of Chinese quince (Chaenomeles sinensis) fruits were analyzed using three different methods of fractioning: milled wood lignin (MWL), LCC extracted from crude MWL with acetic acid (LCC-AcOH), and Bjorkman LCC. The MWL and LCC fractions were characterized by carbohydrate composition analysis, SEC, FT-IR, Py-GC/MS, thermal analysis and 2D HSQC NMR. Notably, large amounts of arabinose and galactose remained in the Björkman LCC fractions suggesting a chemical bond between the lignin and pectin. MWL and LCC-AcOH fractions showed better thermal stability than the Björkman LCC fractions. The structure of MS lignin was similar to that of NE lignin; however, fractions from the different fractionation methods revealed differences. The MWL fractions were rich in benzyl ether and γ-ester linkages, while the Björkman LCC fractions contained phenyl glycoside and γ-ester linkages, and the LCC-AcOH fractions contained phenyl glycoside and benzyl ether linkages. These findings are helpful in understanding the nature of lignin and LCC in Chinese quince fruits and provide a theoretical support for their potential application.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2018.05.117DOI Listing

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