DISTRIBUTION OF HIGH FATTY ACIDS IN THE CROSS SECTION OF THE OAK TRUNK (QUERCUS ROBUR L.)

摘要

High fatty acids were determined in the cross section of the trunk of common oak (Quercus robur L.) Gas chromatography was used to determine the content of high fatty acids in a hexane extract of sapwood, heartwood and wood close to the pith regions at three heights of the trunk. The content of hexane soluble substances in the sapwood zone as well as in heartwood zone does not differ significantly along the trunk. There is about 40% higher content of free fatty acids in the wood close to the pith regions than in the heartwood zone and more than two times higher than in the sapwood zone. There are more acids determined as total acids in the sapwood zone than in the heartwood zone and wood close to the pith.