Uptake of uranium (VI) ions using an anion exchanger resin, namely amberlite CG-400, was studied through this work in the presence of sulfate anions. Impact of various parameters including pH, contact time, initial concentration of uranium ions and intrusion with different anion contents (phosphate, chloride,sulfate, nitrate and fluoride) was examined on the sorption performance of the resin. A...

The presence of a number of minor components was demonstrated in commercial samples of neomycin by column chromatography on a weakly acidic ionexchange resin (Amberlite CG-50). Some of these components were isolated by ionexclusion chromatography and identified. The identification was based on chromatographic and nmr data and on mass spectrometry of volatile derivatives. The sequence of elution...

A fraction enriched in the minor components of the kanamycin complex was prepared from a commercial sample. The enriched fraction was subjected to Amberlite CG-50 and Dowex 1-X2 column chromatography. Two minor components were isolated in addition to the known A, B, and C components. These congeners were identified as paromamine and 6-o-(3-amino-3-deoxy-alpha-d-glucopyranosyl)- deoxystreptamine...

A method based on the linear model of sorption dynamics (LMSD) is applied for the comparison of several solid phase extraction systems used for preconcentration of phenol from water solutions. The method includes the calculation of maximum concentration efficiency for the given values of preconcentration factor and recovery under scope of the model. Original parameters of LMSD were obtained fro...

A double column procedure was devised for simultaneous estimation of norepinephrine, normetanephrine, dopamine, 3-methoxytyramine, and 5-hydroxytryptamine in brain tissue. Columns of aluminum oxide were placed on columns of Amberlite CG-50 by use of a specially devised column holder so that the effluent from the upper columns could flow directly into the lower ones. Perchloric acid extracts of ...

A method of determining histidine decarboxylase activity was established. In this method, 14C-histamine was separated from 14C-histidine by Amberlite CG-resin column in the ammonium form. Lecanoric acid was obtained by screening histidinedecarboxylase inhibitors produced by microorganisms. It is the first isolation of this compound from fungi. The inhibition by lecanoric acid was competitive wi...

A toxin, designated Fvrr has been isolated from the venom of the green mamba Dendroaspis angusticeps by ion exchange chromatography on Amberlite CG-50 and gel filtration on Sephadex G-50. . Toxin FvII consists of 61 amino acid residues, is devoid of phenylalanine and tryptophan, and is cross-linked by four intramolecular disulfide bridges. Immunochemically, toxin FvII is completely distinct fro...