absorption spectrum

(redirected from Absorption spectra)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

spectrum

 [spek´trum] (L.)
1. the series of images resulting from the refraction of electromagnetic radiation (e.g., light, x-rays) and their arrangement according to frequency or wavelength.
2. range of activity, as of an antibiotic, or of manifestations, as of a disease. adj., adj spec´tral.
absorption spectrum one obtained by passing radiation with a continuous spectrum through a selectively absorbing medium.
broad-spectrum effective against a wide range of microorganisms.
visible spectrum that portion of the range of wavelengths of electromagnetic vibrations (from 770 to 390 nanometers) which is capable of stimulating specialized sense organs and is perceptible as light.

ab·sorp·tion spec·trum

the spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance; many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.

absorption spectrum

a plot of percent transmittance, absorbance, logarithm of absorbance, or absorptivity of a compound as a function of wavelength, wave number, or frequency of radiation.

absorption spectrum

The range of light a substance absorbs, plotted as a function of energy, frequency or wavelength.

ab·sorp·tion spec·trum

(ăb-sōrp'shŭn spek'trŭm)
The spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance. Many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.

absorption spectrum

that wavelength of the light spectrum which is absorbed by a pigment. For example, chlorophyll (see Fig. 9 absorbs red and blue light and thus appears green. See ACTION SPECTRUM.

spectrum

pl. spectra, spectrums [L.]
1. the series of images resulting from the refraction of electromagnetic radiation (e.g. light, x-rays) and their arrangement according to frequency or wavelength.
2. range of activity, as of an antibiotic, or of manifestations, as of a disease.

absorption spectrum
one obtained by passing radiation with a continuous spectrum through a selectively absorbing medium.
antibacterial spectrum
the range of bacteria susceptible to a particular antimicrobial or class of antimicrobials.
broad-spectrum
effective against a wide range of microorganisms.
visible spectrum
that portion of the range of wavelengths of electromagnetic vibrations (from 770 to 390 nanometers) which is capable of stimulating specialized sense organs and is perceptible as light.
References in periodicals archive ?
However, many of the aberrantly-colored feathers also exhibited a shoulder above 515 nm on both reflectance and absorption spectra (Figs.
AIST and Tohoku have clearly identified the initial nucleation followed by growth of quantum dot crystals, and moreover clarified the relationship between crystal structures in nucleation and growth, and the optical absorption spectra with the technique of computational chemistry.
UV-Visible absorption spectra were obtained with a Perkin Elmer Lambda 3A spectrophotometer having a bandpass of 2 nm or less, using 10 mm and 1 mm glass cuvettes.
Absorption spectra of human fetal and adult oxyhemoglobin, de-Oxyhemoglobin, carboxyhemoglobin, and methemoglobin.
Figure 1 depicts the absorption spectra of iodine in five different solvents with widely differing dielectric constant values, an index of polarity of molecules [8].
So we switched to trying to detect the change in absorption spectra that Hendricks had predicted in previous experiments on a wide range of plant material.
50 nm) shells were found to result largely in type I core/shell structures and a blue shift of the absorption spectra.
The effectiveness of LGR's patented LWIA and proprietary SCI software results from LGR's novel method of recording detailed high-resolution laser absorption spectra.
After 7 days absorption spectra of these cultures were taken with the help of UV-Visible spectrophotometer in the UV range (200-400nm).
Infrared gas sensors measure carbon dioxide (CO2) based on its characteristic absorption spectra and are used to evaluate the air-sea flux of the gas.
The fraction was expected to be violaxanthin, which is a xanthophyll with two epoxy groups having similar absorption spectra.