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Partial structural characterization and antioxidant activity of a phenolic-xylan from Castanea sativa hardwood.

Abstract：

:4-O-Methylglucuronoxylans (MGX) were isolated from chestnut wood sawdust using two different procedures: chlorite delignification followed by the classical alkaline extraction step, and an unusual green chemistry process of delignification using phthalocyanine/H2O2 followed by a simple extraction with hot water. Antioxidant properties of both MGX were evaluated against the stable radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) by electronic spin resonance (ESR). IC50 of water-extracted MGX was found to be less than 225 μg mL(-1), in contrast with alkali-extracted MGX for which no radical scavenging was observed. Characterization of extracts by colorimetric assay, GC, LC-MS and NMR spectroscopy provided some clues to understanding structure-function relationships of MGX in connection with their antioxidant activity.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Renault E,Barbat-Rogeon A,Chaleix V,Calliste CA,Colas C,Gloaguen V

doi

10.1016/j.ijbiomac.2014.07.005

subject

Has Abstract

pub_date

2014-09-01 00:00:00

pages

373-80

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(14)00470-X

journal_volume

70

pub_type

杂志文章

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