|
Copaiba is a stimulant oleoresin obtained from the trunk of several pinnate-leaved South American leguminous trees (genus ''Copaifera''). The thick, transparent exudate varies in color from light gold to dark brown, depending on the ratio of resin to essential oil. Copaiba is used in making varnishes and lacquers. The balsam may be steam distilled to give ''copaiba oil'', a colorless to light yellow liquid with the characteristic odor of the balsam and an aromatic, slightly bitter, pungent taste. The oil consists primarily of sesquiterpene hydrocarbons; its main component is caryophyllene. The hydrocarbons in copaiba are terpenes, which are made by plants from isoprene, a "five-carbon-atom building block, so they always contain carbon atoms in multiples of five. Pinene is one of several useful 10-carbon terpenes. It is commonly known as turpentine. Heated up, terpenes break down into methanol (CH3OH) and other simple compounds useful for fuel and as raw materials in the chemical industry." Copaiba is also a common name for several species of trees of the legume family native to Tropical Africa and North and South America. == Uses == Copaiba is particularly interesting as a source of biodiesel, because of the high yield of 12,000 liters per ha. The resin is tapped from standing trees, with an individual tree yielding 40 liters per year. 〔 〕 Copaiba has been used in traditional medicine. It has a long history of use as a folk medicine. In Panama, the Yaviza people mix the resin with honey and give it to newborns to impart knowledge and ward off hexes. The balsam and its oil are used as fixatives in soap perfumes and fragrances.〔 Copaiba is also used as an artist material, especially in oil paint recipes and in ceramic decoration. Mineral painters use a medium made of copaiba, turpentine and lavender to mix with their minerals for adhesion to ceramic vessels before kiln firing. Copaiba makes a good medium for oils and helps with both adhesion and quality of shine. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Copaiba」の詳細全文を読む スポンサード リンク
|