<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors></contributors><titles><title><style face="normal" font="default" size="100%">Variability of suberin composition of reproduction cork from Quercus suber throughout industrial processing</style></title><secondary-title><style face="normal" font="default" size="100%">HOLZFORSCHUNG</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1999</style></year></dates><publisher><style face="normal" font="default" size="100%">WALTER DE GRUYTER &amp; CO</style></publisher><pub-location><style face="normal" font="default" size="100%">GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY</style></pub-location><volume><style face="normal" font="default" size="100%">53</style></volume><pages><style face="normal" font="default" size="100%">56-62</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The chemical composition of suberin was studied in cork planks from&lt;br/&gt;three different trees of Spanish Quercus suber at four different stages&lt;br/&gt;of the industrial processing of first transformation: stripping (a),&lt;br/&gt;first rest (b), boiling followed by open air rest (c1) and boiling&lt;br/&gt;followed by store-room rest (c2). The monomeric composition was&lt;br/&gt;determined by gas chromatography/mass spectrometry in the product of&lt;br/&gt;depolymerization of the free of extractives cork with sodium&lt;br/&gt;methoxide-methanol. The average concentrations of the main monomers&lt;br/&gt;were: 1-alkanols (C-20-C-26) 4.17 %; alkanoic acids (C-20-C-26) 5.99&lt;br/&gt;%; alpha, omega-alkanedioic acids (C-16-C-24) 6.20 %;&lt;br/&gt;omega-hydroxy-alkanoic acids (C-20-C-26) 29.41 %; erythro- and threo-9,&lt;br/&gt;10-dihydroxyoctadecanedioic acids 6.76 %, erythro- and&lt;br/&gt;threo-9,10,18-trihydroxyoctadecanoic acids 9.50 %,&lt;br/&gt;9,10-epoxy-18-hydroxyoctadecanoic acid 2.72 % and&lt;br/&gt;9,10-epoxy-octadecanedioic acid 2.93 % and ferulic acid 5.05 %.&lt;br/&gt;Significant differences were observed between samples taken at the&lt;br/&gt;stripping and after boiling with store room rest, and both groups of&lt;br/&gt;samples differed from those picked after the other two processing&lt;br/&gt;stages. Ten components were selected as providing the greatest&lt;br/&gt;discrimination among stages: 9-octadecenedioic,&lt;br/&gt;18-hydroxy-9-octadecenoic, eicosanedioic and&lt;br/&gt;9,10-epoxy-18-hydroxy-octadecanoic acids, tetracosanol, and five&lt;br/&gt;unidentified components.</style></abstract></record></records></xml>