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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 ...
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.
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 ...
A number of Wikipedia articles contain pro and con lists: lists of arguments for and against some particular contention or position.These take several forms, including lists of advantages and disadvantages of a technology; pros and cons of a proposal which may be as technical as Wi-Fi or otherwise; and lists of criticisms and defenses of a political position or other view (such as socialism or ...
Amid growing anxieties surrounding reported drone sightings, the FBI has issued a warning against a new trend of pointing lasers at aircrafts.
Jatobá may refer to: . Hymenaea courbaril, tree common to the Caribbean, Central, and South America; Jatobá, Maranhão, municipality in Brazil; Jatobá, Pernambuco ...
Washington Mystics co-owner Sheila Johnson has garnered backlash after she gave her two cents on the magazine naming Clark its “Athlete of the Year.”