The Applications of Ultraviolet Visible Absorption Spectrum Detection Technology in Gemstone Identification
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Visible and near-ultraviolet absorption spectrum of liquid water.
The optical absorption of pure liquid water in the 300-700-nm region has been measured by use of a long (1.5-m) path-length cell. The absorption spectrum coincides well with the edge of previous data in the 200-320-nm region and provides reliable data in the 320-420-nm region that has until now been a region of considerable unreliability. The data obtained for the 420-700-nm region agree quite ...
متن کاملDerivative ultraviolet-visible region absorption spectrophotometry and its analytical applications.
Theoretical aspects, instrumental devices and analytical applications of derivative ultraviolet-visible region absorption spectrophotometry are reviewed.
متن کاملThe Ultraviolet Absorption Spectrum of Pepsin
The ultraviolet absorption spectrum of Northrop's pure crystalline pepsin has been determined. The curve of calculated molecular extinction coefficients is given. There is noted a general resemblance of the absorption curve for pepsin to that for urease and tyrosine; the absorption band is maximum at 2750-2800 A.micro., minimum near 2500. A slight hump on either side of the peak of the extincti...
متن کاملmesuring the staff technology readiness, the case of a multi national chemical company operating in iran
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15 صفحه اولVisible and near-ultraviolet absorption spectrum of ice from transmission of solar radiation into snow.
Snow is a scattering-dominated medium whose scattering is independent of wavelength at 350-600 nm. The attenuation of solar radiation in snow can be used to infer the spectral absorption coefficient of pure ice, by reference to a known value at 600 nm. The method is applied to clean Antarctic snow; the absorption minimum is at 390 nm, and the inferred absorption coefficient is lower than even t...
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ژورنال
عنوان ژورنال: DEStech Transactions on Materials Science and Engineering
سال: 2017
ISSN: 2572-889X
DOI: 10.12783/dtmse/icmeat2016/6097