当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES期刊下所有文献 > Characteristics of chemical structure of lignin biopolymer from Araucaria relict plant. Questions and answers of evolution.

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

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 × 1017 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.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Kocheva LS,Karmanov AP,Mironov MV,Belyy VA,Polina IN,Pokryshkin SA

doi

10.1016/j.ijbiomac.2020.05.150

subject

Has Abstract

pub_date

2020-09-15 00:00:00

pages

896-903

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(20)33305-5

journal_volume

159

pub_type

杂志文章

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