Characteristics of chemical structure of lignin biopolymer from Araucaria relict plant. Questions and answers of evolution.

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
Read More Add to Saved list
  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 7909578 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0003 (Electronic) Linking ISSN: 01418130 NLM ISO Abbreviation: Int J Biol Macromol Subsets: MEDLINE
    • Publication Information:
      Publication: Amsterdam : Elsevier
      Original Publication: Guildford, Eng., IPC Science and Technology Press.
    • Subject Terms:
      Molecular Structure*; Biopolymers/*chemistry ; Lignin/*chemistry ; Plant Extracts/*chemistry; Gas Chromatography-Mass Spectrometry ; Spectroscopy, Fourier Transform Infrared
    • Abstract:
      New details of chemical structure of Araucaria lignin are the focus of this paper, since Araucaria is a relict plant which fossils are dated by the Permian period. Quantitative chemical analysis, FTIR, EPR and 2D NMR spectroscopies, Py-GC/MS and nitrobenzene oxidation have been used to characterize the Araucaria lignin. This work highlighted the structural features of the lignin of Araucaria, which distinguish it from modern coniferous (gymnosperm) lignins. This lignin exhibits pronounced paramagnetic properties with the concentration of paramagnetic centers of 3.0 × 10 17  spin/g, the value of g-factor of 2.0036 corresponds to the phenoxyl radical. The Araucaria lignin is apparently unique since it does not belong to the known G, GS or GSH types. For the first time it was quantitatively proven that he lignin of Araucaria was assigned to compositionally heterogeneous GH lignins, which is not typical for modern lignins.
      (Copyright © 2020 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Araucaria; Chemical structure; Lignin
    • Accession Number:
      0 (Biopolymers)
      0 (Plant Extracts)
      9005-53-2 (Lignin)
    • Publication Date:
      Date Created: 20200524 Date Completed: 20210319 Latest Revision: 20210319
    • Publication Date:
      20221213
    • Accession Number:
      10.1016/j.ijbiomac.2020.05.150
    • Accession Number:
      32445820