Radical transfer system in the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA) and three dilignols
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Yasuyuki Matsushita
,
Masaya Okayama
Abstract
No clear picture has yet been elaborated concerning the mechanism of lignin growth, and thus this topic is the focus of the present paper. Namely, the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA, as a monolignol) and three dilignols and their reaction kinetics were investigated. The dilignols [guaiacylglycerol-β-coniferyl ether (IβO4), dehydrodiconiferyl alcohol (IIβ5), and pinoresinol (IIIββ)] and CA as a monolignol [(3-OCD3)-coniferyl alcohol (CAOCD3)] were synthesized and subjected to enzymatic DHP formation. The dilignol derived from CAOCD3 could be identified by its higher molecular weight in comparison with the starting dilignols (IβO4, IIβ5, and IIIββ). Based on the observed consumption rate of the CA and its dilignols, it was proposed that a radical transfer system exists between the dilignols, which is generated from the CA and the starting substrates.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Cutting forces and chip formation revisited based on orthogonal cutting of Scots pine
- Predicting structural timber grade-determining properties using acoustic and density measurements on young Sitka spruce trees and logs
- Natural resistance of eight Brazilian wood species from the region Caatinga determined by an accelerated laboratory decay test against four fungi
- Understanding the effect of weathering on adhesive bonds for wood composites using digital image correlation (DIC)
- Time-dependent ammonia emissions from fumed oak wood determined by micro-chamber/thermal extractor (μCTE) and FTIR-ATR spectroscopy
- Rheology of moso bamboo stem determined by DMA in ethylene glycol
- Carbon nanomaterials based on interpolyelectrolyte complex lignosulfonate-chitosan
- Radical transfer system in the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA) and three dilignols
- The gene expression and enzymatic activity of pinoresinol-lariciresinol reductase during wood formation in Taiwania cryptomerioides Hayata
- Applicability of chloroplast DNA barcodes for wood identification between Santalum album and its adulterants
- Short Note
- Strength and stiffness of the reaction wood in five Eucalyptus species
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Cutting forces and chip formation revisited based on orthogonal cutting of Scots pine
- Predicting structural timber grade-determining properties using acoustic and density measurements on young Sitka spruce trees and logs
- Natural resistance of eight Brazilian wood species from the region Caatinga determined by an accelerated laboratory decay test against four fungi
- Understanding the effect of weathering on adhesive bonds for wood composites using digital image correlation (DIC)
- Time-dependent ammonia emissions from fumed oak wood determined by micro-chamber/thermal extractor (μCTE) and FTIR-ATR spectroscopy
- Rheology of moso bamboo stem determined by DMA in ethylene glycol
- Carbon nanomaterials based on interpolyelectrolyte complex lignosulfonate-chitosan
- Radical transfer system in the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA) and three dilignols
- The gene expression and enzymatic activity of pinoresinol-lariciresinol reductase during wood formation in Taiwania cryptomerioides Hayata
- Applicability of chloroplast DNA barcodes for wood identification between Santalum album and its adulterants
- Short Note
- Strength and stiffness of the reaction wood in five Eucalyptus species
