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Related Experiment Video

Updated: Jul 8, 2026

Extraction of Lignin with High &#946;-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
10:18

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

Evolution Process of Pseudo-lignin Derived from Lignocellulose.

Tianjiao Hu1, Jiaxuan Wang1, Yang Yang1

  • 1Inner Mongolia Key Laboratory of Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010020, China.

Journal of Agricultural and Food Chemistry
|July 7, 2026
PubMed
Summary

Researchers isolated pseudo-lignin from corncobs, revealing trans-p-coumaric acid (TPCA) as key to its formation. This breakthrough aids understanding lignocellulose utilization and pseudo-lignin mechanisms.

Keywords:
biomasshuminsligninlignocellulosepseudo-lignin

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Last Updated: Jul 8, 2026

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10:18

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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues
09:22

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Published on: March 9, 2021

Area of Science:

  • Biomass Conversion
  • Lignocellulose Valorization
  • Polymer Chemistry

Background:

  • Pseudo-lignin formation impedes efficient lignocellulose utilization.
  • Studying pseudo-lignin is challenging due to its mixture with other biomass components.

Purpose of the Study:

  • To isolate and characterize corncob-derived pseudo-lignin for the first time.
  • To elucidate the formation mechanism of pseudo-lignin.
  • To establish reaction networks and structural models of pseudo-lignin.

Main Methods:

  • Tetrahydrofuran (THF)/petroleum ether (PE) extraction for pseudo-lignin isolation.
  • Identification of key intermediates like trans-p-coumaric acid (TPCA).
  • Comprehensive characterization techniques and sodium chlorite/acetic acid (SCA) pretreatment.
  • Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) analysis.

Main Results:

  • Successfully isolated pseudo-lignin from corncobs using THF/PE extraction.
  • Identified TPCA as a crucial intermediate in pseudo-lignin formation.
  • Established pseudo-lignin reaction networks and structural models.
  • Demonstrated that lignin degradation products introduce benzene rings into pseudo-lignin, confirmed by SCA pretreatment and SEM-EDS (higher C/O ratio in pseudo-lignin vs. lignin).

Conclusions:

  • The study provides the first isolation of pseudo-lignin, enabling mechanistic studies.
  • Lignin degradation products, particularly TPCA, are essential for pseudo-lignin formation and its characteristic structure.
  • Pseudo-lignin possesses a higher carbon-to-oxygen ratio compared to native lignin.