caa a22 4500 463216881 CHVBK 20180405153159.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s00226-007-0149-2 doi (NATIONALLICENCE)springer-10.1007/s00226-007-0149-2 Chemical, anatomical and technological properties of Snakewood [ Brosimum guianense (Aubl.) Huber] [Elektronische Daten] [Gunthard Scholz, Falk Liebner, Gerald Koch, Claus-Thomas Bues, Björn Günther, Ernst Bäucker] The very decorative heartwood of Brosimum guianense is internationally well known. Snakewood, as it is colloquially known, is represented in wood databases (e.g. the DELTA or InsideWood) as well as in lists of commercial timbers of many timber trading companies. The very decorative heartwood is hardly available and gains prices of up to 25€/kg in form of half stems. In the present study, the chemical composition and especially the subcellular cell structure was analysed by means of UV microspectrophotometry to explain the high natural durability and some extraordinary physical properties in addition to the anatomical composition. The heartwood consists of approximately 39% lignin, 54% carbohydrates and 0.4% lipophilic compounds of unspecified origin. The fibres are very thick-walled. Numerous sclerotic tyloses and organic deposits are present in the vessel. The extractives in high content are also components of parenchyma cells as well as in tyloses, respectively. These detected phenolic extractives, partly of flavonoid character, are also part of the cell wall. Calcium oxalate crystals are deposited in the upright and square cells of rays and sporadically in axial parenchyma cells. These facts are reasons for the famous natural durability of Snakewood. The sapwood density ranges from 1.1 to 1.4g/cm3 for heartwood (12% mc). The compression strength (119N/mm2), the bending strength (241N/mm2), the modulus of elasticity (23,200N/mm2) and the hardness (196N/mm2) indicate exceedingly high elastomechanical properties. Springer-Verlag, 2007 Scholz Gunthard Institut für Holzbiologie und Holztechnologie, Büsgenweg 4, 37077, Göttingen, Germany aut Liebner Falk Department of Organic Chemistry, University of Natural Resources and Applied Life Sciences, Muthgasse 18, 1180, Vienna, Austria aut Koch Gerald Federal Research Centre for Forestry and Forest Products, Institute for Wood Biology and Wood Protection, Leuschnerstraße 91, 21031, Hamburg, Germany aut Bues Claus-Thomas Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut Günther Björn Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut Bäucker Ernst Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut Wood Science and Technology Springer-Verlag 41/8(2007-12-01), 673-686 0043-7719 41:8<673 2007 41 226 https://doi.org/10.1007/s00226-007-0149-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-007-0149-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Scholz Gunthard Institut für Holzbiologie und Holztechnologie, Büsgenweg 4, 37077, Göttingen, Germany aut NATIONALLICENCE 700 1- Liebner Falk Department of Organic Chemistry, University of Natural Resources and Applied Life Sciences, Muthgasse 18, 1180, Vienna, Austria aut NATIONALLICENCE 700 1- Koch Gerald Federal Research Centre for Forestry and Forest Products, Institute for Wood Biology and Wood Protection, Leuschnerstraße 91, 21031, Hamburg, Germany aut NATIONALLICENCE 700 1- Bues Claus-Thomas Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut NATIONALLICENCE 700 1- Günther Björn Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut NATIONALLICENCE 700 1- Bäucker Ernst Chair of Forest Utilization and Forest Technology, Dresden University of Technology, Pienner Straße 19, 01735, Tharandt, Germany aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/8(2007-12-01), 673-686 0043-7719 41:8<673 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer