<?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><authors><author><style face="normal" font="default" size="100%">Holloway, P J</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The composition of suberin from the corks of Quercus suber L. and Betula pendula roth</style></title><secondary-title><style face="normal" font="default" size="100%">Chemistry and Physics of Lipids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1972</style></year></dates><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">158-170</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The suberin constituents of Quercus suber and Betula pendula have been isolated after alkaline hydrolysis of the corks and over 80% by weight identified using thin-layer chromatography, preparative thin-layer chromatography, gas-liquid chromatography and combined gas chromatography — mass spectrometry. Long-chain aliphatic acids ranging from C16–C26 comprise about 90% of both suberin fractions; monobasic, α,ω-dibasic, ω-hydroxymonobasic, dihydroxymonobasic, dihydroxydibasic and trihydroxymonobasic acid classes are present. The principal suberin acids of Q. suber are 18-hydroxyoctadecenoic (12%), 22-hydroxydocosanoic (25%), 9,10-dihydroxyoctadecane-1,18-dioic (15%) and 9,10,18-trihydroxyoctadecanoic (8%), and those of B. pendula 9,10,18-trihydroxyoctadecanoic (43%) and 22-hydroxydocosanoic (16%). The remainder of the suberin fractions are non-acidic and comprise mainly unidentified cyclic alcohols in B. pendula. Similar compounds and alkan-1-ols occur in Q. suber.</style></abstract></record></records></xml>