fractionation


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fractionation

[‚frak·shə′nā·shən]
(chemistry)
Separation of a mixture in successive stages, each stage removing from the mixture some proportion of one of the substances, as by differential solubility in water-solvent mixtures.
(nucleonics)
Alterations in the isotopic composition of substances found in nature or in radioactive weapon debris, which result from small differences in the physical and chemical properties of isotopes of an element.
References in periodicals archive ?
[T]he Department's fractional interest acquisition pilot program in the BIA's Midwest Regional Office had succeeded, as of that time, in purchasing over 40,000 fractional interests located on 3 reservations--and thereby forever avoiding any further fractionation of those interests over the course of future generations--the Department's witness also testified that the rate of fractionation of other interests has been so great that the same number of outstanding interests exist today on these 3 reservations as when the program first began 4 years ago.
Experimental data were interpreted using a 'three-N' pool model which includes [sup.15]N fractionation during N mineralisation.
The isotopic fractionation of [13.sup]C was performed according to the relationship determined by Michener and Schell (1994): [DELTA] = [[delta].sup.13][C.sub.zooplankton]-[[delta].sup.13][C.sub.phytoplankton] and negative results were presented in module.
With a fractionation capacity of up to 1.1 mbpd, the Juaymah NGL Fractionation Plant is ranked as the world's largest by independent sources.
Khullar explained that in the dry fractionation method, the kernel is crushed, flattening out the germ.
These results indicate that transgenic lines of corn containing GFP could be used to optimize existing fractionation methods and improve processing techniques and for a variety of corn-related research projects.
KEY WORDS: juvenile abalone, stable isotope ratios, fractionation values, feeding experiment, Haliotis discus hannai
In addition, further fractionation optimization will be conducted this month at a pilot plant in the Switzerland-based research and development center of Buhler's parent company, Buhler AG.
Fractionation technology from Digilab Biovision GmbH, Hanover, Germany, was adopted for the isolation of low molecular weight peptides (typically <15,000 Da) from human plasma ultrafiltrate." N.A.
For good strength properties, fractionation in long and short fibers--followed by a refining of the long fiber--can be useful.
Broin Companies recently unveiled its new bio-refining technology, dubbed Broin Fractionation (BFrac), during the Fuel Ethanol Workshop (FEW) in Kansas City, MO.
The firm's quality assurance program includes many tests, including one for precise determination of the grain size distribution of ground rubber via air jet sieve LS 200-N, in order to check the fractionation efficiency and to establish optimum process parameters.