On the basis of optimized grinding/heating cycles developed for several phosphate-based ceramics, the preparation of brabantite and then monazite/brabantite solid solutions loaded with tetravalent thorium, uranium, and cerium (as a plutonium surrogate) was examined versus the heating temperature. The chemical reactions and transformations occurring when heating the initial mixtures of AnO2/CeO2...

Acid-base solid catalysts synthesized with structurally controlled uniform active sites can lead to unique catalysis. In this study, a CePO4 catalyst was synthesized using a hydrothermal method and found to exhibit high catalytic performance for the chemoselective acetalization of 5-hydroxymethylfurfural with alcohols, in sharp contrast to other homogeneous and heterogeneous acid and/or base ca...

In the present study, the feasibility to use phosphate solubilizing bacteria (PSB) to develop a biological leaching process of rare earth elements (REE) from monazite-bearing ore was determined. To predict the REE leaching capacity of bacteria, the phosphate solubilizing abilities of 10 species of PSB were determined by halo zone formation on Reyes minimal agar media supplemented with bromo cre...

The adsorption of nucleotides on the surface nanocrystalline cerium dioxide (pHpzc = 6.3) in NaCl solutions was investigated using multi-batch experiments over a wide range pH. obtained results were interpreted as formation outer and inner sphere complexes with participation phosphate moieties. Basic Stern complexation model applied to obtain quantitative equilibrium reaction constants.

High-affinity Ca2(+)-ATPase activity in the optic tectum of the brain of cichlid fish was cytochemically localized using cerium ions to precipitate phosphate. Activation of the enzyme with micromolar instead of millimolar calcium concentrations (i.e., physiological cytoplasmic instead of extracellular concentrations) resulted in intracellular localization of reaction product attached to the cyt...