Cotton effect

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Cot·ton ef·fect

the positive and negative displacement from zero of the rotation of plane polarized monochromatic light and the change of monochromatic circularly polarized light into elliptically polarized light in the immediate vicinity of the absorption band of the substance through which the light passes.
See also: optic rotatory dispersion, circular dichroism.
[Frank A. Cotton]
Farlex Partner Medical Dictionary © Farlex 2012


Frank A., U.S. chemist, 1930–.
Cotton effect - a change in the sign of optical rotation of a specimen as the wavelength of observation is changed.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
Cotton trading ([grade.sub.i]): Effect of high grade cotton to cotton trading price of the large cotton trading price formation was significantly higher than other grades of long staple cotton, low grade cotton effects on seed cotton price is uncertain.
The CD spectrum of 2 (Figure S13) showed positive (355 nm) and negative (243 nm) Cotton effects, indicating the 5R, 6R, and 7R configuration.
The CD spectrum of 3 (Figure S19) showed negative Cotton effects in the regions of 238 nm the same as that of known analog [12].
(2009).Transgenic-Bt and non-transgenic cotton effects on survival and growth of Helicoverpa armigera.