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Topic: Halide


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 Photography [encyclopedia]   (Site not responding. Last check: 2007-11-07)
Scott Archer (1813-57) in 1851 invented the collodion 'wet plate', and dry plates coated with sensitized emulsion were produced commercially in the mid-1870s, followed by celluloid-based film from 1889.
In a camera, light reaching the photo-sensitive emulsion containing silver halide crystals forms a latent (invisible) image, which can be made visible by chemical development, reducing the exposed crystals to fl metallic silver.
The remaining unaffected halide is then removed by fixing to leave a permanent negative record of the exposure.
artzia.com /photography   (495 words)

  
 halide on Encyclopedia.com   (Site not responding. Last check: 2007-11-07)
Durakbasa, Ayse, Halide Edib Turk Modernlesmesi ve Feminizm.
University of California Scientists Discover Plant Gene That Promotes Production of Ozone-Destroying Methyl Halides.
CTX Opto Delivers Ultraportable EzPro 580 LCD Projector with Metal Halide Light Source; True SVGA 800x600 Resolution Personal Projector Makes It The Total Solution For Mobile Presenters.
www.encyclopedia.com /html/X/X-halide.asp   (181 words)

  
 Encyclopedia article on Halide [EncycloZine]   (Site not responding. Last check: 2007-11-07)
All Group I Earth metals form halides with the halogens and they are white solids.
Metal halides are used in high-intensity discharge lamps, such as in modern street lights, because they are more energy-efficient than mercury-vapor lamps, and have much better colour rendition than orange high-pressure sodium lamps.
Products related to Halide: books, DVD, electronics, garden, kitchen, magazines, music, photo, posters, software, tools, toys, VHS, videogames
encyclozine.com /Halide   (138 words)

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