quebracho


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Related to quebracho: lignum vitae, Lignum vitæ

quebracho

(kābrä`chō), 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 (sumacsumac
or sumach
, common name for some members of the Anacardiaceae, a family of trees and shrubs native chiefly to the tropics but ranging into north temperate regions and characterized by resinous, often acrid, sap.
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 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 dogbanedogbane,
common name for some members of the Apocynaceae, a family of herbs, shrubs, and trees found in most parts of the world but especially in the tropics, where they are often climbing forms. Many species are native to or naturalized in North America.
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 family is one of the other hardwoods similarly used and is native to the same region. Red quebracho is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Sapindales, family Anacardiaceae.

Quebracho

 

the name of several subtropical species of South American trees and of their wood, bark, and tanning extracts. The species Schinopsis balansae and S. quebracho-colorado (also known as S. lorentzii) of the family Anacardiaceae have a hard heavy wood containing approximately 20 percent tannins. The bark of Aspidosperma quebracho-bianco of the family Apocynaceae contains alkaloids (the most active, yohimbine) and approximately 25 percent tannins.

quebracho

[kā′bra·chō]
(botany)
Any of a number of South American trees in different genera in the order Sapindales, but all being a valuable source of wood, bark, and tannin.
(materials)
A drilling-fluid additive used for thinning or dispersing in order to control viscosity and thixotropy; made from an extract of the quebracho tree and consisting essentially of tannic acid.
References in periodicals archive ?
En el analisis de ordenamiento de los bosques segun composicion faunistica, el bosque de quebrachos y el serrano son los mas proximos, en tanto, el bosque secundario y el mesopotamico se diferenciaron de este agrupamiento y tambien entre ellos (Figura 7); resultado que coincide con lo indicado por los valores obtenidos del analisis de similitud (Tabla 2).
En el sector centro-norte se identifico la Asociacion constituida por la Serie Arroyo Quebracho y la Serie Garat, con dominancia de las caracteristicas de la Serie Arroyo Quebracho.
Salinity tolerance in Schinopsis quebracho colorado: Seed germination, growth, ion relations and metabolic responses.
Aspidosperma quebracho blanco es una de las especies forestales mas abundante del Parque Chaqueno y con un mayor horizonte de existencia (Aguilar y Agostini, 2005).
03% recovery using additional quantity of sodium oleate as collector, sodium silicate and quebracho as regulators for the gangue minerals in the cleaner circuits.
Estudio sobre el comportamiento de oviposicion del "cortapalos" Oncideres guttulata Thomson (Coleoptera: Cerambycidae) sobre "quebracho colorado", Schinopsis quebracho colorado (Schlecht) Bark et Meyer.
The scientists conducted a laboratory study to evaluate the effectiveness of tannins from the quebracho tree, which have been used in other studies of ruminant digestion, in reducing the emission of odors and greenhouse gases from swine manure pits.
En lo que se refiere a las herramientas de poder que ejerce el Estado, Fernando Esteche, lider del MPR Quebracho (7), un grupo marxista bolivariano y antiimperialista, muy presente en los muros de Buenos Aires y factor movilizante del movimiento piquetero, aduce: "Los medios construyen realidad y la politica es espacio publico, y el espacio publico, lejos de ser la plaza de la antigua Grecia, hoy tambien son los medios de comunicacion"
Se emitieron en valores de 1,2, 5, 10, 20, 50 y 100, al igual que la nominacion de la moneda nacional, por lo que un quebracho no solo equivalia nominalmente a un peso convertible sino que cualquier billete de la moneda nacional tenia su equivalente en quebracho.
En dias de fiesta, preparabamos asados en el bosque, con brasas de quebracho y buena mano argentina.
Tartephedreel from Heel, for example, contains Tartarus stibiatus 4X, Hepatica triloba 3X, belladonna 4X, Natrium sulfuricum 4X, Arsenicum ioda turn 6X, Quebracho 5X, Naphthalinum 6X, Betonica 2X, Anisum stellatum 3X, Lobelia inflata 4X, ipecacuanha 4X, Blatta orientalis 6X, drops 3 times per day under the tongue.