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- n. Plural form of fractionation.
Sorry, no etymologies found.
While carrying out numerous fractionations and crystallizations, he determined the weight of radium and prepared a radium standard, which became the official substitute to the original in Paris.
#86 John there are very significant isotopic fractionations associated with photosynthesis such that C3 plants are very depleted in 13-C compared to atmopsheric CO2.
Modelling delta 18 O fractionations in atmospheric moisture will test the convergence of GCM predictions of the magnitude and spatial distribution of palaeoclimates with the evidence from the palaeoclimate record.
Nitrogen and argon isotopes in the porous snow layer (~80m) experience two isotopic fractionations by gravitation and temperature gradients (DeltaT) between the top and bottom of the snow layer.
The only remotely plausible routes to a prebiotic pool of pure _-D-nucleotides would involve a series of reactions catalyzed by minerals or metal ions, coupled with a series of subtle fractionations of nucleotide-like materials based on adsorption on minerals, selective complex formation, crystallization, etc.
The air used in these fractionations was allowed to evaporate in vacuum vessels, during the operations; but care was always taken to save the dregs, and collect them in
With this I intended to repeat some fractionations which had appeared promising.