Traces of P(V) and As(V) in sample solutions were converted into heteropoly molybdic acids at pH 1.5 and collected onto polyoxyethylene(20)-4-isononylphenoxy ether-coated Amberlite XAD-4 particles. The desorption was carried out with 0.3 M tetramethylammonium hydroxide solution for the HPLC analysis. Molybdophosphoric and molybdoarsenic acids were separated from excess molybdate by ion-pair rev...

Techniques are described for the coating of sorbents to be used in an artificial liver support system based on mixed sorbent bed hemoperfusion. Activated charcoal has been coated with cellulose acetate (CA) by solvent evaporation. With Amberlite XAD-4, the Wurster technique was used for coating with CA. XAD-4 has also been coated with a synthetic polyelectrolyte with anticoagulant activity by a...

The potential of naphthol blue–black-modified Amberlite IRA-400 anion-exchange resin for separation of heavy metal pollutants has been explored. The distribution coefficients (Kd) of metal ions in several acidic solvent systems have been studied. The effect of the dissociation constant of the solvent on the distribution coefficient of metal ions has also been investigated. On the basis of Kd va...

We used the method described here to detect and identify seven benzodiazepine derivatives--diazepam, chlorodiazepoxide, nitrazepam, cloxazolam, oxazolam, oxazepam, and medazepam--and their metabolites in the urine of rabbits given the seven drugs orally. We column-chromatographed 25-ml samples of urine on Amberlite XAD-2. The drugs and their metabolites in the urine were adsorbed by the resin, ...

A glycosidically bound fraction was prepared by adsorbing a 80% methanol extract from fresh rhizomes of ginger onto a column of Amberlite XAD-2 resin and successively eluting with ethyl acetate or methanol. Enzymatic hydrolysis of this fraction with an acetone powder prepared from fresh ginger and commercial glycosidase liberated such alcohols as geraniol, 2-heptanol, α-terpineol, nerol, linalo...

A54145 is a complex of acidic lipopeptide antibiotics which are produced by Streptomyces fradiae and are active against Gram-positive bacteria. The A54145 complex was isolated by adsorption on Diaion HP-20 nonfunctionalized macroreticular resin and/or ion exchange on Amberlite IRA-68 anion exchange resin. Antibacterial factors A, A1, B, B1, C, D, E, and F were obtained in purified form by repea...

A study of regeneration of the ion exchange resins using a sub-critical mixture of CO2-H2O solution was reported. The experimental data were obtained by measuring the outlet concentration of ions Cd eluated from a column packed with a commercial ion exchange resin Amberlite IRC-86 until the effluent reached the input concentration. The adsorption isotherm was also reported. The correlation of t...

This paper presents an optosensor for screening of four polycyclic aromatic hydrocarbons: anthracene (ANT), benzo[a]pyrene (BaP), fluoranthene (FLT), and benzo[b]fluoranthene (Bbf) using a photomultiplier device with an artificial neural network as transducer. The optosensor is based on the on-line immobilization on a non-ionic resin (Amberlite XAD-4) solid support in a continuous flow. The det...

The maximum yield for the production of L-681,110 by Streptomyces sp. MA-5038 (ATCC 31587) was observed after 5 days' incubation at 28 degrees C and pH about 8.3. L-681,110 was isolated from the fermentation broth by acetone extraction of the mycelia, absorption to Amberlite XAD-2 resin and two separations by thin-layer chromatography. The structure of L-681,110 was found to consist of a sixtee...

Further evidence has been obtained which confirms that foot-and-mouth disease virus contains several structural proteins. By electrophoresis in urea-polyaerylamide gels, virus of type O gave six distinct bands. In sodium dodecyl sulphatepolyacrylamide gels four proteins with molecular weights of 34, 3o, 26 and Iy5 x io 3 were clearly demonstrated. When virus preparations were labelled with a si...