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Encyclopedia > Canada balsam

Canada balsam, also called Canada turpentine or balsam of fir, is a turpentine which is made from the resin of the balsam fir. Turpentine is a fluid obtained by the complex distillation of resin obtained from trees, mainly various species of pine (Pinus). ... Insect trapped in resin. ... Binomial name Abies balsamea (L.) Mill. ...


It is the fir's resin, dissolved in essential oils, and is a viscous, sticky, colourless (sometimes yellowish) liquid, that turns to a transparent yellowish mass when the essential oils have been allowed to evaporate. Insect trapped in resin. ... An essential oil is a concentrated, hydrophobic liquid containing volatile aromatic compounds extracted from plants. ... Viscosity is a measure of the resistance of a fluid to deformation under shear stress. ... An essential oil is a concentrated, hydrophobic liquid containing volatile aromatic compounds extracted from plants. ...


Due to its high optical quality, its refractive index (n = 1.55) very close to that of glass, and its purity it is mainly used in optics as an invisible-when-dry glue for glass. It is soluble in xylene, amorphous when dried, and it does not crystallize with age, so its optical properties do not deteriorate. The refractive index of a material is the factor by which the phase velocity of electromagnetic radiation is slowed relative to vacuum. ... This article refers to the material. ... See also: List of optical topics Optics (appearance or look in ancient Greek) is a branch of physics that describes the behavior and properties of light and the interaction of light with matter. ... Historically, glue only refers to protein colloid adhesives prepared from animal tissues, such as hide glue, bone glue, or fish glue. ... The term xylenes refers to a group of 3 benzene derivatives which encompasses ortho-, meta-, and para- isomers of dimethyl benzene. ... An amorphous solid is a solid in which there is no long-range order of the positions of the atoms. ...


Some uses include:

  • in biology to conserve microscopic samples. The sample is sandwiched between the microscope slide (a glass plate) and the cover plate (a small thin glass plate) and Canada balsam is used to glue the arrangement together and enclose the sample to conserve it;
  • in optical technology to glue together optical elements such as two prisms to form a beam splitter, or two lenses;
  • to fix scratches in glass (car glass for instance) as invisibly as possible.
  • in oil painting to achieve glow and facilitate fusion.

See also Balm of Gilead. Biology is the branch of science dealing with the study of life. ... It has been suggested that microscopy be merged into this article or section. ... If a shaft of light entering a prism is sufficiently small such that the coloured edges meet, a spectrum results In optics, a prism is a device used to refract light, reflect it or break it up (to disperse it) into its constituent spectral colours (colours of the rainbow). ... A beam splitter is an optical device, that splits a beam of light in two. ... A lens. ... This article refers to the material. ... Balm of Gilead is a healing compound made from the resinous gum of a bush which grew plentifully in the area of Gilead. ...


  Results from FactBites:
 
Canada balsam - definition of Canada balsam - Labor Law Talk Dictionary (247 words)
Canada balsam - yellow transparent exudate of the balsam fir; used as a transparent cement in optical devices (especially in microscopy) and as a mounting medium
Synonyms: balsam fir, balm of Gilead, Abies balsamea
Canada balsam, also called canada turpentine or balsam of fir, is a turpentine which is made from the resin of the balsam fir.
Canada balsam - Wikipedia, the free encyclopedia (227 words)
Canada balsam, also called Canada turpentine or balsam of fir, is a turpentine which is made from the resin of the balsam fir.
It is the fir's resin, dissolved in essential oils, and is a viscous, sticky, colourless (sometimes yellowish) liquid, that turns to a transparent yellowish mass when the essential oils have been allowed to evaporate.
The sample is sandwiched between the microscope slide (a glass plate) and the cover plate (a small thin glass plate) and Canada balsam is used to glue the arrangement together and enclose the sample to conserve it;
  More results at FactBites »

 
 

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