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The wood is very hard, measuring 5.6 on the Brinell scale and 2,350 lbf (10,500 N) on the Janka scale, approximate measurements of hardness. For comparison, Douglas fir measures 660 lbf (2,900 N), white oak 1,360 lbf (6,000 N), and Brazilian walnut 3,800 lbf (17,000 N) on the Janka scale. It features a tan to salmon color with black accent ...
When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...
Thermally modified wood is engineered wood that has been modified by a controlled pyrolysis process of wood being heated to (> 180 °C) in an oxygen free atmosphere. This process changes to the chemical structures of wood's cell wall components lignin , cellulose and hemicellulose which decreases its hygroscopy and thus increases dimensional ...
Acetylated wood is a type of modified wood that is produced through a chemical modification process and does not contain any toxic substances. [1] It produced from a chemical reaction (named as acetylation), involving acetic anhydride and a modification process to make wood highly resistant to biological attacks by fungi and wood-boring insects and durable to environmental conditions.
Friedrich Gottlob Hayne, a German botanist, first scientifically described this species in 1830 as Hymenaea stigonocarpa, a name that had been used before by Carl Friedrich Philipp von Martius, and was based on a specimen collected from a seasonally dry forest type, locally known as Caatinga, in the state of Piauí, north-eastern Brazil, during his 1817-1820 expedition.
Investigators said they had “serious concerns” about “credible reports of sexual assault and other sexual misconduct" by the officers.
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