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quebracho
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quebracho
The Columbia Encyclopedia, Sixth Edition
quebracho , name for a tanning substance and for the trees from which it comes, chiefly the red quebracho, or quebracho colorado ( Schinopsis lorentzii ), of the family Anacardiaceae ( sumac family). This hardwood tree, native to the Paraguayan subtropics, supplies one of the most durable and heavy of timbers. It also provides much of the vegetable tannin for the leather industry although the populations are being depleted. The heartwood, stripped of its bark and subjected to extraction processes, is about 30% tannin. Quebracho is obtained chiefly from wild trees of the forests of the Gran Chaco of Argentina, Paraguay, and Bolivia. White quebracho ( Aspidosperma quebracho-blanco ) of the dogbane family is one of the other hardwoods similarly used and is native to the same region. Red quebracho is classified in the division Magnoliophyta , class Magnoliopsida, order Sapindales, family Anacardiaceae.
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The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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dogbane
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Gran Chaco
...stretching across the borders of Argentina, Bolivia, and Paraguay. Arid and largely unpopulated, the region is famous for its quebracho trees, a major source of tannin . The discovery of oil in the Chaco Borea, and Bolivia's subsequent need for a route to the...
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Gran Chaco
...stretches of dense forest in which the quebracho tree abounds. Tannin extraction from the quebracho is an important economic activity there...River, has much the same aspect. Cotton and quebracho are important there. The plains grow increasingly...
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sumac
...an essential oil that can cause dermatitis. In these and other species the sap is also a major source of tannin, e.g., the quebracho tree of Paraguay, the lacquer tree of SE Asia, and the terebinth or turpentine tree and the mastic trees of the Mediterranean...
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Resistencia
...inhabited northwest. The city carries on a lively trade from its port, Barranqueras, on the Paraná River. Cotton, cattle, lumber, quebracho (for tannin extraction), and sugarcane are the city's chief products; the economy of the surrounding region is based on farming...
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