<?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%">JENSEN, W</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">STUDY OF OUTER BARK OF BIRCH (BETULA-VERRUCOSA) AND CORK OAK (QUERCUS-SUBER) BY SCANNING ELECTRON-MICROSCOPY</style></title><secondary-title><style face="normal" font="default" size="100%">ANALES DE QUIMICA-INTERNATIONAL EDITION</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical properties</style></keyword><keyword><style  face="normal" font="default" size="100%">cork cells</style></keyword><keyword><style  face="normal" font="default" size="100%">scanning electron micrographs</style></keyword><keyword><style  face="normal" font="default" size="100%">suberin</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1972</style></year></dates><publisher><style face="normal" font="default" size="100%">SPRINGER-VERLAG IBERICA</style></publisher><pub-location><style face="normal" font="default" size="100%">PROVENZA 388, E-08025 BARCELONA, SPAIN</style></pub-location><volume><style face="normal" font="default" size="100%">68</style></volume><pages><style face="normal" font="default" size="100%">871--&amp;</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The outer bark of corkoak and birch constitutes a particularly suitable starting material for the study of suberin, the cell wall substance that imparts specific properties to the cork cell. In investigations of birch and oak suberin made by the author in the fifties, great interest was attached to the publications of Ribas on the chemistry of cork. The present article contains a brief survey of the differences between, and the similarities in, the outer bark of these two wood species, demonstrable on the basis of the investigations mentioned. This comparison, concerned with the chemical properties, is supplemented by a number of scanning electron micrographs of the cork tissue of the two species.</style></abstract><notes><style face="normal" font="default" size="100%">APS</style></notes><research-notes><style face="normal" font="default" size="100%">APS</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%">Cooke, Giles B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cork and its uses</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Chemical Education</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cork</style></keyword><keyword><style  face="normal" font="default" size="100%">cork cells</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork composition</style></keyword><keyword><style  face="normal" font="default" size="100%">natural cork</style></keyword><keyword><style  face="normal" font="default" size="100%">uses (voyant)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1931</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1931///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1021/ed008p1462</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">8</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Cork is the bark of the cork oak which i s found along the shores of the West- ern Mediterranean. When the tree is twenty years old the cork i s stripped from the trunk and at nine-year intewals thereafter. Cork i s composed of tiny air-filled cells held together by a natural resinous binder. Because of this structure cork i s light, compressible, resilient, and waterproof. Cork has a low thermal conductivity and a high coefficient of friction. Cork has b e a shown to contain tannins, phlobaphaes, lignin, and cerin. Glycerin and several acids h o e been obtained by saponification. Natural cork is used to manufacture stoppers, life presewers, and many other articles. Scraps of cork are ground and used i n the manufacture of cork composition from which gaskets, polishing wheels, crown seels, and numerous other articles are made. Corkboard for insulation and cork tile, cork carpet, and linoleum for floors, are manufactured from cork.</style></abstract><issue><style face="normal" font="default" size="100%">8</style></issue><notes><style face="normal" font="default" size="100%">doi: 10.1021/ed008p1462doi: 10.1021/ed008p1462The following values have no corresponding Zotero field:&lt;br/&gt;publisher: American Chemical Society</style></notes></record></records></xml>