Tuftsin (Thr-Lys-Pro-Arg) receptor was purified to apparent homogeneity by affinity chromatography, using a pentapeptide analog (Thr-Lys-Pro-Pro-Arg) that binds the receptor more than 4 times as avidly as tuftsin. The analog was covalently linked to a solid support (Affi-Gel 10). Rabbit peritoneal granulocyte membrane solubilized with 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate wa...

fuel oil used in power plants contain metal impurities like vanadium. after combustion, this metal remains in boiler fuel ash in the form of oxide. in this research, extraction of vanadium oxide from fuel ash has been investigated. two processes were used for this purpose. a pyro- hydrometallurgy and a hydrometallurgy process. in the pyro-hydrometallurgy process, using sodium carbonate, salt ro...

Highly pure and well-dispersed yttria nanocrystalline powders were synthesized with a modified coprecipitation method that uses mixed ammonium hydroxide-carbonate solution as the precipitant poly acrylic acid (PAA) dispersant. Comparing using same route but without PAA dispersant, PAA-assisted exhibit lower level of agglomeration better sinterability. Sintering trajectories dispersant investiga...

Gold(I) catalysts enable the chemoselective addition of tailor-made N-sulfonylated azetidine derivatives onto alkynes, affording bicyclic vinyl-ammonium gold intermediates. Intramolecularly intercepted by an adequately positioned nucleophilic carbonate or ester function, these ammoniums efficiently lead to ring-expanded azepine products, which are important pharmacophore fragments. Depending on...