<?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%">Graça, José</style></author><author><style face="normal" font="default" size="100%">Santos, Sara</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Linear Aliphatic Dimeric Esters from Cork Suberin</style></title><secondary-title><style face="normal" font="default" size="100%">Biomacromolecules</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">cork suberin</style></keyword><keyword><style  face="normal" font="default" size="100%">dimeric esters</style></keyword><keyword><style  face="normal" font="default" size="100%">Dimerization</style></keyword><keyword><style  face="normal" font="default" size="100%">Electrospray Ionization</style></keyword><keyword><style  face="normal" font="default" size="100%">Electrospray Ionization: metho</style></keyword><keyword><style  face="normal" font="default" size="100%">Esters</style></keyword><keyword><style  face="normal" font="default" size="100%">Esters: chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">GC-MS (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">Lipids</style></keyword><keyword><style  face="normal" font="default" size="100%">Mass</style></keyword><keyword><style  face="normal" font="default" size="100%">Membrane Lipids</style></keyword><keyword><style  face="normal" font="default" size="100%">Membrane Lipids: chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">Molecular Structure</style></keyword><keyword><style  face="normal" font="default" size="100%">Sensitivity and Specificity</style></keyword><keyword><style  face="normal" font="default" size="100%">Spectrometry</style></keyword><keyword><style  face="normal" font="default" size="100%">Trees</style></keyword><keyword><style  face="normal" font="default" size="100%">Trees: chemistry</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">7</style></volume><pages><style face="normal" font="default" size="100%">2003-2010</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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 α,?-diacids and ?-hydroxyacids. ESI-MS analysis of the methanolysate showed, besides the aliphatic monomers, suberin oligomers, including linear dimeric esters of α,?-diacids and ?-hydroxyacids. Two types of dimeric esters were identified:? a α,?-diacid linked to a ?-hydroxyacid and two inter-linked ?-hydroxyacids. The α,?-diacids and ?-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.</style></abstract><accession-num><style face="normal" font="default" size="100%">16768426</style></accession-num><notes><style face="normal" font="default" size="100%">From Duplicate 1 (Linear Aliphatic Dimeric Esters from Cork Suberin - Graça, José; Santos, Sara)</style></notes><research-notes><style face="normal" font="default" size="100%">From Duplicate 1 (Linear Aliphatic Dimeric Esters from Cork Suberin - Graça, José; Santos, Sara)</style></research-notes></record><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%">Pascoal Neto, C.</style></author><author><style face="normal" font="default" size="100%">Rocha, J.</style></author><author><style face="normal" font="default" size="100%">Gil, A.</style></author><author><style face="normal" font="default" size="100%">Cordeiro, N.</style></author><author><style face="normal" font="default" size="100%">Esculcas, a P.</style></author><author><style face="normal" font="default" size="100%">Rocha, S.</style></author><author><style face="normal" font="default" size="100%">Delgadillo, I.</style></author><author><style face="normal" font="default" size="100%">de Jesus, J. D.</style></author><author><style face="normal" font="default" size="100%">Correia, a J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">13C solid-state nuclear magnetic resonance and Fourier transform infrared studies of the thermal decomposition of cork.</style></title><secondary-title><style face="normal" font="default" size="100%">Solid state nuclear magnetic resonance</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Fourier Transform Infrared (citation)</style></keyword><keyword><style  face="normal" font="default" size="100%">Hot Temperature</style></keyword><keyword><style  face="normal" font="default" size="100%">Lignin</style></keyword><keyword><style  face="normal" font="default" size="100%">Lignin: chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">Lipids</style></keyword><keyword><style  face="normal" font="default" size="100%">Magnetic Resonance Spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Membrane Lipids</style></keyword><keyword><style  face="normal" font="default" size="100%">Membrane Lipids: chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">Polysaccharides</style></keyword><keyword><style  face="normal" font="default" size="100%">Polysaccharides: chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">Spectroscopy</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1995</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1995///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/7773647</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">4</style></volume><pages><style face="normal" font="default" size="100%">143 - 151</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The thermal decomposition of cork has been studied by Fourier transform infrared (FTIR) spectroscopy and 13C solid-state nuclear magnetic resonance (NMR) spectroscopy with cross-polarization and magic-angle spinning (CP-MAS), high-power 1H decoupling (HPDEC) and cross-polarization depolarization-polarization (CPDP). Waxes and other soluble components of cork begin to decompose at ca. 150 degrees C. This is accompanied by partial decomposition of suberin, probably initiated at the points of attachment to the cell wall. The carbohydrates begin to decompose at ca. 200 degrees C. The decomposition of lignin begins at 250-300 degrees C, while suberin undergoes further degradation. Significant amounts of coke are formed in the process. At 400 degrees C cork has been transformed into coke with traces of partially decomposed suberin. The thermal decomposition of cork is dependent on the calcination time, particularly in the 200-350 degrees C range.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;accession-num: 7773647</style></notes></record></records></xml>