The composition of suberin from the corks of Quercus suber L. and Betula pendula roth

✍ Scribed by P.J. Holloway

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 650 KB
• Volume: 9
• Category: Article
• ISSN: 0009-3084
• DOI: 10.1016/0009-3084(72)90011-4

✦ Synopsis

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 C~6-C~6 comprise about 90% of both suberin fractions; monobasic, cq~o-dibasic, ¢o-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-l,l 8-dioic (15 o/) and 9,10,18-t rihydroxyoctadecanoic (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-l-ols occur in Q. suber.