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Tytuł:
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Characteristics of chemical structure of lignin biopolymer from Araucaria relict plant. Questions and answers of evolution.
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Autorzy:
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Kocheva LS; Institute of Geology of the Komi Science Center UB RAS, Pervomaiskaya st. 54, Syktyvkar 167982, Republic of Komi, Russia.
Karmanov AP; Institute of Biology of the Komi Science Center UB RAS, Kommunisticheskaya st. 28, Syktyvkar 167982, Republic of Komi, Russia; Syktyvkar Forest Institute, Lenina st. 39, Syktyvkar 167982, Republic of Komi, Russia.
Mironov MV; Syktyvkar Forest Institute, Lenina st. 39, Syktyvkar 167982, Republic of Komi, Russia.
Belyy VA; Institute of Chemistry of the Komi Science Center UB RAS, Pervomaiskaya st. 48, Syktyvkar 167982, Republic of Komi, Russia. Electronic address: .
Polina IN; Syktyvkar Forest Institute, Lenina st. 39, Syktyvkar 167982, Republic of Komi, Russia.
Pokryshkin SA; Northern Northern (Arctic) Federal University named after MV Lomonosov, Dvina emb. 17, Arkhangelsk 163002, Russia.
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Źródło:
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International journal of biological macromolecules [Int J Biol Macromol] 2020 Sep 15; Vol. 159, pp. 896-903. Date of Electronic Publication: 2020 May 21.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Amsterdam : Elsevier
Original Publication: Guildford, Eng., IPC Science and Technology Press.
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MeSH Terms:
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Molecular Structure*
Biopolymers/*chemistry
Lignin/*chemistry
Plant Extracts/*chemistry
Gas Chromatography-Mass Spectrometry ; Spectroscopy, Fourier Transform Infrared
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Contributed Indexing:
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Keywords: Araucaria; Chemical structure; Lignin
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Substance Nomenclature:
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0 (Biopolymers)
0 (Plant Extracts)
9005-53-2 (Lignin)
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Entry Date(s):
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Date Created: 20200524 Date Completed: 20210319 Latest Revision: 20210319
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Update Code:
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20240105
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DOI:
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10.1016/j.ijbiomac.2020.05.150
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PMID:
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32445820
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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.)
