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The term tannin (from scientific French tannin, from French tan "crushed oak bark", tanner "to tan", cognate with English tanning, Medieval Latin tannare, from Proto-Celtic *tannos "oak") refers to the abundance of these compounds in oak bark, which was used in tanning animal hides into leather.
According to Rochleder (ibid lxiii. 202), the tannic acid of black tea is the same as that of oak-bark. [7] In 1880, Etti gave for it the molecular formula C 17 H 16 O 9. He described it as an unstable substance, having a tendency to give off water to form anhydrides (called phlobaphenes), one of which is called oak-red (C 34 H 30 O 17). For ...
The bark resembles that of the white oak. The leaves are broad ovoid, 12–18 centimetres (4 + 3 ⁄ 4 –7 inches) long and 7–11 cm (2 + 3 ⁄ 4 – 4 + 1 ⁄ 4 in) broad, always more or less glaucous on the underside, and are shallowly lobed with five to seven lobes on each side, intermediate between the chestnut oak and the white oak. In ...
Wood ash from a campfire. Wood ash is the powdery residue remaining after the combustion of wood, such as burning wood in a fireplace, bonfire, or an industrial power plant.It is largely composed of calcium compounds, along with other non-combustible trace elements present in the wood, and has been used for many purposes throughout history.
Although called a white oak, it is very unusual to find an individual specimen with white bark; the usual colour is a light gray. The name comes from the colour of the finished wood. In the forest it can reach a magnificent height and in the open it develops into a massive broad-topped tree with large branches striking out at wide angles. [5]
Quercus gambelii, with the common name Gambel oak, is a deciduous small tree or large shrub that is widespread in the foothills and lower mountains of western North America. It is also regionally called scrub oak , oak brush , and white oak .
Common names for Quercus sinuata var. breviloba are Bigelow oak, Bigelow's oak, shallow-lobed oak, white shin oak, scaly-bark oak, limestone Durand oak, and shortlobe oak. Other common names include scrub oak or shin oak , but these names may refer to a number of other low growing, clump forming oak species, subspecies or varieties.
Quercus sinuata var. breviloba, commonly called Bigelow oak or Bigelow's oak, is a variety of Quercus sinuata, a species of oak tree [1] that grows in parts of the southern United States and northeastern Mexico. Common names for this taxon are shallow-lobed oak, white shin oak, scaly-bark oak, limestone Durand oak, and shortlobe oak. [2]