absorption spectrum


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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 ?
Overlap (>30%) of the fluorescence emission spectrum of the donor with the absorption spectrum of the acceptor.
An example CO absorption spectrum, which was recorded during a series of experiments, is presented in Fig.
For more layers, the efficiency does not increase appreciably due to the saturation of the absorption spectrum.
One had the same absorption spectrum of trans-[beta]-carotene standard and was identified as [beta]-cryptoxanthin.
The resolution of the absorption spectrum is about 20 times finer than FTIR spectroscopy.
All biological systems have a unique absorption spectrum.
If Beer's law is obeyed for all the compounds over the whole wavelength range used and the path-length is 1cm, the absorption spectrum of the mixture is defined by the equation:
s] and the structure is a mirror image of the absorption spectrum shown in Fig.
The important factor is that the wavelengths of infra-red radiant energy that are produced match the absorption spectrum of the majority of materials used in industry today so that these materials will absorb the emitted infra-red energy ultimately leading to the required process curing of the plant.
The result would be a yellow tint from the additive's absorption spectrum.
Addition of the cationic surfactant CTAB resulted in a 6-fold increase in polymer fluorescence intensity and a narrowed, blue-shifted polymer absorption spectrum, suggesting that interaction with surfactant helped to break up polymer aggregates.