منابع مشابه
pH-zone-refining countercurrent chromatography.
A recently developed preparative technique, pH-zone-refining countercurrent chromatography (CCC), separates organic acids and bases according to their pKa and hydrophobicity. The hydrodynamic mechanism of pH-zone-refining CCC is illustrated in two elution modes along with a simple mathematical analysis. Separations include acidic and basic derivatives of amino acids and peptides, hydroxyxanthen...
متن کاملSite-selective electronic correlation in α-plutonium metal.
An understanding of the phase diagram of elemental plutonium (Pu) must include both, the effects of the strong directional bonding and the high density of states of the Pu 5f electrons, as well as how that bonding weakens under the influence of strong electronic correlations. Here we present electronic-structure calculations of the full 16-atom per unit cell α-phase structure within the framewo...
متن کاملAging Effects in Plutonium Metal Pose an Interesting Puzzle
Aging effects in plutonium metal are of metallurgical and practical interest. The Dismantlement Program has provided a wide variety of plutonium samples from a large number of retired nuclear weapons , enabling the development of a comprehensive database of materials properties as a function of age. Data are providing a substantive statistical foundation for these properties as well. The primar...
متن کاملPlutonium problems.
Contaminants in Fish From the icy waters of Boston Harbor to the warm waves of San Diego Bay, bottomdwelling fish suffer liver damage caused by chemical contaminants, according to researchers at the National Oceanic and Atmospheric Administration. But seafood lovers need not panic, because damaged specimens were captured primarily in urban waters where commercial fishing is prohibited, said Lyn...
متن کاملAccurate Quantification of Radioactive Materials by X-ray Fluorescence: Gallium in Plutonium Metal
Two XRF specimen preparation methods were investigated for quantifying gallium in plutonium metal. Gallium in plutonium was chosen here as an example for demonstrating the efficacy of wavelength dispersive XRF for quantifying radioactive materials. The steps necessary to handle such materials safely will also be discussed. Quantification of plutonium samples by a wellestablished aqueous specime...
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ژورنال
عنوان ژورنال: Journal of Radioanalytical and Nuclear Chemistry
سال: 1998
ISSN: 0236-5731,1588-2780
DOI: 10.1007/bf02385935