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Rosin is the resinous constituent of the oleo-resin exuded by various species of pine, known in commerce as crude turpentine. The separation of the oleo-resin into the essential oil (spirit of turpentine) and common rosin is accomplished by distillation in large copper stills. The essential oil is carried off at a temperature of between 100 °C ...
A non-contact force is a force which acts on an object without coming physically in contact with it. [1] The most familiar non-contact force is gravity, which confers weight. [1] In contrast, a contact force is a force which acts on an object coming physically in contact with it. [1] All four known fundamental interactions are non-contact ...
Contact forces are often decomposed into orthogonal components, one perpendicular to the surface(s) in contact called the normal force, and one parallel to the surface(s) in contact, called the friction force. [1] Not all forces are contact forces; for example, the weight of an object is the force between the object and the Earth, even though ...
Turpentine (which is also called spirit of turpentine, oil of turpentine, terebenthine, terebenthene, terebinthine and, colloquially, turps) [2] is a fluid obtained by the distillation of resin harvested from living trees, mainly pines.
Pine resin (sap) has been used by various tribes to waterproof baskets, pails, and boats. The Ojibwe also used pine resin to successfully treat infections and even gangrenous wounds, [39] because pine resin apparently has a number of quite efficient antimicrobials. Generally, a wet pulp from the inner bark, or pine tar mixed with beeswax or ...
The word resin comes from French resine, from Latin resina "resin", which either derives from or is a cognate of the Greek ῥητίνη rhētínē "resin of the pine", of unknown earlier origin, though probably non-Indo-European. [10] [11]
Elton John's gift may be his song, but that doesn't mean he loves them all. During an appearance on The Late Show with Stephen Colbert on Tuesday, Dec. 17, ...
Pitch produced from petroleum may be called bitumen or asphalt, while plant-derived pitch, a resin, is known as rosin in its solid form. Tar is sometimes used interchangeably with pitch, but generally refers to a more liquid substance derived from coal production, including coal tar, or from plants, as in pine tar. [2]