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Turpentine
Turpentine is a fluid obtained by distillation from resin obtained
from trees, mainly various species of pine (Pinus). It is composed
of terpenes, mainly the monoterpenes alpha-pinene and beta-pinene.
Alternative names are wood turpentine, spirit of turpentine, oil
of turpentine and gum turpentine. It is also known colloquially
as just "turps", although this more often refers to turpentine
substitute (or mineral turpentine).
Important pines for turpentine production include:
Maritime Pine Pinus pinaster
Aleppo Pine Pinus halepensis
Masson's Pine Pinus massoniana
Sumatran Pine Pinus merkusii
Longleaf Pine Pinus palustris
Loblolly Pine Pinus taeda
Ponderosa Pine Pinus ponderosa
although one of the earliest sources is thought to be the Terebinth
Pistacia terebinthus or turpentine tree, a Mediteranean tree related
to the pistachio.
Medicinal uses
Turpentine has been used medically since ancient times.
Applied externally to the affected areas, turpentine is a highly
effective treatment for lice.
Turpentine can be mixed with animal fat as a primitive chest rub
for nasal and throat complaints. Some modern chest rubs still contain
some turpentine (e.g., Vicks).
Internal administration of turpentine is no longer common today,
though it was once the preferred means of treating intestinal parasites.
Industrial uses
The two primary uses of turpentine in industry are as a solvent
and as a source of materials for organic synthesis.
As a solvent, turpentine is used for thinning oil-based paints,
producing varnishes, and as a raw material for the chemical industry.
Its industrial use as a solvent in first-world nations have largely
been replaced by the much cheaper turpentine substitutes distilled
from crude oil.
Turpentine is also used as a source of raw materials in the synthesis
of fragrant chemical compounds. Commercially used camphor, linalool,
alpha-Terpineol, and Geraniol are all usually produced from alpha-pinene
and beta-pinene, which are two of the chief chemical components
of turpentine. These pinenes are separated and purified by distillation.
A mixture of diterpenes and triterpenes that left as residue after
terpentine distillation is sold as rosin.
Turpentine is also added to many cleaning and sanitary products
due to its antiseptic properties and its "clean scent".
Hazards
Turpentine is an organic solvent, and thus poses many of the same
hazards as do other substances in this class. It can burn the skin
and eyes, damage the lungs and respiratory system, as well as the
central nervous system when inhaled, and cause kidney failure when
ingested, among other things. It is highly flammable.
The paintings are the excellent portrayal of the events and scenes
that we see around us. The painters are the best cameras of the
world. They reproduce many different types of pictures. They even
draw imaginary pictures that do not exist in this world. We tend
to use both thinned oil paints and dense oil paints. Masterpieces
can be dyed more than once, but each time it may be different from
the existing paintings.
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