action spectrum


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action spectrum

[′ak·shən ‚spek·trəm]
(physiology)
Graphic representation of the comparative effects of different wavelengths of light on living systems or their components.
References in periodicals archive ?
Action spectrum conversion factors that change erythemally weighted to previtamin [D.
An action spectrum is the effectiveness of different wavelengths of light to cause a photobiological or photochemical action or reaction.
The spectral mismatch correction technique commonly used in photometry can be applied to UV broadband measurements where the photopic V([lambda]) function is replaced by a particular UV action spectrum.
Moreover, the researchers found that the absorption spectrum of the smallest particles matched the action spectrum of unsorted eumelanin.
Because knowledge about the action spectrum for the induction of melanoma is limited, a risk analysis for this condition could not be conducted.
1972), "The Merits of an Envelope Action Spectrum for Ultraviolet Radiation Exposure Criteria," American Industrial Hygiene Association Journal, 33:644-653.
The new human action spectrum now indicates that the longer UV-A exposures needed to create a tan would pose about the same cancer risk as a UV-B tanning dose.
Toward that progress, the German Institute for Standardization released a prestandard, DIN V 5031-100, defining an action spectrum for nocturnal melatonin suppression ([S.
An action spectrum for melatonin suppression: evidence for a novel non-rod, noncone photoreceptor system in humans.
Skene, An action spectrum for melatonin suppression: evidence for a novel non-rod, non-cone photoreceptor system in humans.
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