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 کاملModeling of Inlet Zone in Hydrostatic Extrusion Process for Aluminum and Aluminum Alloys
The objective of this paper is to investigate the viscous shear heating effect on the formation of minimum film thickness in inlet zone of the hydrostatic extrusion process as function of various operating parameters. Minimum film thicknesses in the inlet zone has been evaluated at various extrusion speeds, material parameters, extrusion pressures, and die semiangle for extrusion of low strengt...
متن کاملStudy on the Trace Elements in Zone-Refined Aluminum
Impurities in the zone-refined aluminum have been determined qualitatively and quantitatively mainly by using nondestructive activation analysis. Remarkable results are summarized as follows: (1) The remaining impurities in the ZR-Al are Li, B, Na, Mg, Si, Ca, Sc, Mn, Fe, Cu, Zn, Sb, La, Ce, Sm, Dy, and Au. (2) The principal impurities contributed to the residual resistivity are Si and Sc. (3) ...
متن کاملThermodynamic Analysis for the Refining Ability of Salt Flux for Aluminum Recycling
The removability of impurities during the aluminum remelting process by oxidation was previously investigated by our research group. In the present work, alternative impurity removal with chlorination has been evaluated by thermodynamic analysis. For 43 different elements, equilibrium distribution ratios among metal, chloride flux and oxide slag phases in the aluminum remelting process were cal...
متن کاملLC/MS guided isolation of alkaloids from lotus leaves by pH-zone-refining counter-current chromatography.
The traditional methods used in natural product separation primarily target the major components and the minor components may thus be lost during the separation procedure. Consequently, it's necessary to develop efficient methods for the preparative separation and purification of relatively minor bioactive components. In this paper, a LC/MS method was applied to guide the separation of crude ex...
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ژورنال
عنوان ژورنال: Transactions of the Japan Institute of Metals
سال: 1976
ISSN: 0021-4434,2432-4701
DOI: 10.2320/matertrans1960.17.645