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HERO ID
3044715
Reference Type
Journal Article
Title
Effect of stereo-configurational difference of carbohydrate model compound on the reaction with active oxygen species under oxygen delignification conditions
Author(s)
Nakagawa, A; Yokoyama, T; Matsumoto, Y
Year
2015
Is Peer Reviewed?
1
Journal
Journal of Wood Science
ISSN:
1435-0211
EISSN:
1611-4663
Volume
61
Issue
5
Page Numbers
510-516
DOI
10.1007/s10086-015-1499-2
Web of Science Id
WOS:000362912600008
Abstract
We examined how the stereo-configurational difference affects the reaction of a carbohydrate model compound with active oxygen species (AOS) generated in situ by reactions between O-2 and a phenolic compound under conditions similar to those of oxygen delignification or with oxyl anion radical, the conjugate base of hydroxyl radical, generated by the decomposition of H2O2 under alkaline conditions. As the phenolic compound, 2,4,6-trimethylphenol or 4-hydroxy-3-methoxybenzyl alcohol (vanillyl alcohol) was used. The carbohydrate model compounds employed were methyl beta-d-glucopyranoside (MGP beta) and its 4 epimers, methyl alpha-d-glucopyranoside (MGP alpha), methyl beta-d-mannopyranoside (MMP), methyl beta-d-allopyranoside (MAP), and methyl beta-d-galactopyranoside (MGaP). Their stabilities were in the order of MGP alpha > MGP beta > MMP > MGaP > MAP, indicating that the reactivity of the carbohydrate model compound is significantly dependent on where the stereo-configurational difference is. Only the co-existence of MMP enhanced the degradation of MGP beta, when a pair of MGP beta and another carbohydrate model compound was reacted with the AOS. This result suggests that the profile of AOS in the system is dependent not only on the type of phenolic compound, the generator of AOS, but also on that of the carbohydrate model compound.
Keywords
Bleaching; Cellulose; Hydrogen peroxide; Lignin; Pulp
Tags
IRIS
•
Trimethylbenzenes (Interagency Science Discussion Draft)
Literature Search Update
Literature Search Update- Excluded
Excluded by Title/Abstract
Chemistry or Physical or Engineering
•
Trimethylbenzenes (TMB)
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