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Linear aliphatic dimeric esters from cork suberin

delete2006-05-24
delete44
PRE
AI
J
José Graça *
S
Sara Santos
DOI：10.1021/bm060174udelete
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摘要

摘要

En 中文
Cork suberin was partially depolymerized by methanolysis catalyzed by calcium hydroxide. Analysis by GC-MS of the methanolysate showed suberin monomers, including glycerol and long-chain alpha, omega-diacids and omega-hydroxyacids. ESI-MS analysis of the methanolysate showed, besides the aliphatic monomers, suberin oligomers, including linear dimeric esters of R, omega-diacids and omega-hydroxyacids. Two types of dimeric esters were identified: a alpha,omega-diacid linked to a omega-hydroxyacid and two inter-linked omega-hydroxyacids. The R, omega-diacids and omega-hydroxyacids found as monomer residues in the dimeric esters were mainly the C18 monomers with midchain substituents. The identification of these dimeric esters was based in their CID-MS/MS spectra and confirmed after synthesis of model compounds. The occurrence of inter-esterified long-chain monomers in suberin brings a new insight in the understanding of the polyester structure of this biopolymer.
Keyword:
HIGHER-PLANTS
MONOMERS
GLYCERYL
CUTIN
POLYESTERS
CATALYSTS
OLIGOMERS
GROWTH
POTATO
ROOTS
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期刊

Biomacromolecules 封面图
Biomacromolecules
IF:
5.4
论文数:
1.2W
被引数:
4.1W

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