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Paubrasilia echinata is a species of flowering plant in the legume family, Fabaceae, that is endemic to the Atlantic Forest of Brazil. [4] [5] It is a Brazilian timber tree commonly known as Pernambuco wood or brazilwood [6] (Portuguese: pau-de-pernambuco, pau-brasil; [6] Tupi: ybyrapytanga [7]) and is the national tree of Brazil. [5]
The heartwood is used to produce dye for wool and cotton cloth and a pink colouring used in pharmaceuticals and toothpaste. The pigments hematoxylin and hematein can be extracted and are complex phenols similar to bioflavonoids. Extracts of hardwood chips are used as remedies by the Tarahumara Indians. [5]
Brazilwood or Brazil from Brazil, producing a red dye. Catechu or cutch from Acacia wood, producing a dark brown dye. [1] Old Fustic from India and Africa, producing a yellow dye. [2] Logwood from Belize, producing a red or purple dye. [3]
Aluminium mordants used with brazilin produce the standard red colors, while the use of a tin mordant, in the form of SnCl 2 or SnCl 4 added to the extract is capable of yielding a pink color. An alternative preparation which produces a transparent red color involves soaking the brazilwood powder in glair or a solution of gum arabic. Alum is ...
Sappanwood is related to brazilwood (Paubrasilia echinata), and was itself called brasilwood in the Middle Ages. [4] Biancaea sappan can be infected by twig dieback (Lasiodiplodia theobromae). [5] This plant has many uses. It has antibacterial and anticoagulant properties.
The building blocks of life have been found on an alien asteroid, scientists have said. Samples taken by Nasa from the asteroid Bennu have not only the ingredients required to life but also show ...
Dalbergia nigra produces a very hard and heavy wood, characteristically varied in colour from brick red through various shades of brown (medium to nearly black). Pieces that feature veins of black colouration called spider webbing or landscape grain are especially prized.
The dense vividly colored scarlet wood of B. paraense is used for decorative woodworking. [3] B. guianense , or snakewood , has a mottled snake-skin pattern, and is among the densest woods, with a very high stiffness; it was the wood of choice for making of bows for musical instruments of the violin family until the late 18th century, when it ...