Cerium-based complex oxides are essential materials well-suited for numerous applications related to heterogeneous catalysis and electrocatalysis. However, the impact of structural defects on thermal stability surface has still be elucidated. Probing lanthanum environments by 139La NMR analyzing, first time in parallel, associated Raman spectroscopy allow a better view at bulk samples annealed ...

8 The isothermal section of the La–B–C phase diagram at 1270 K has been investigated by 9 means of X-ray, neutron powder diffraction, microstructure and EPMA analyses. Eight ternary 10 compounds were found, and for six of them the crystal structures have been established. The 11 phase with the structure type of La5B2C6 has a broad homogeneity range described by the 12 formula La5(BC)x (5.6x8....

Bis-acylhydrazones of 2,6-pyridinedicarbaldehyde are introduced as planar pentadentate ligands for the coordination of lanthanide(III) ions. With large cations (e.g. lanthanum(III)) 1 : 1 as well as 2 : 1 ligand-to-metal complexes are formed depending on the stoichiometry of the reaction. The different complexes are distinguished by NMR spectroscopy and ESI MS in solution and they can be charac...

An epithelioid line of rabbit kidney cells (RK 13), in which the distribution of blood group antigen A had previously been investigated by mixed agglutination, was chosen for studies of the structure of the cell surface. Cells were grown in monolayer culture, and thin sections were examined by electron microscopy after fixation in glutaraldehyde and osmium tetroxide and staining of the sections...

[La[N(SiHMe2)2]2[CH(PPh2NSiMe3)2]], which was obtained via an amine elimination starting from [CH2(PPh2NSiMe3)2] and [La[N(SiHMe2)2]3(THF)2], was used as catalyst for the hydroamination/cyclisation, the hydrosilylation and the sequential hydroamination/hydrosilylation reaction.

BACKGROUND AND OBJECTIVES Management of hyperphosphatemia, a predictor of mortality in chronic kidney disease, is challenging. Nonadherence to dietary phosphate binders, in part, contributes to uncontrolled serum phosphorus levels. This phase IIIb trial assessed the efficacy of increased dosages (3000 to 4500 mg/d) of reformulated lanthanum carbonate (500-, 750-, and 1000-mg tablets) in nonresp...

The first liquid-phase synthesis of high-quality, small-sized rare-earth metal nanoparticles (1–3 nm)—ranging from lanthanum as one the largest (187 pm) to scandium smallest (161 metal—is shown. Size, oxidation state, and reactivity are examined (e.g., electron microscopy, spectroscopy, X-ray absorption selected reactions). Whereas highly reactive (e.g. in contact air water), they chemically st...

The axoplasm of the neurons of Penplaneta amencana contains numerous neurotubules which are morphologically similar to the microtubules found in non-nervous tissues after sectioning or negative staining. In cross-sections of fixed material such tubules usually appear as electron-dense circles containing a less dense core and surrounded by a non-opaque ' clear zone'. However, when cockroach gang...