Synthesis and structural evolution of BaLaTiBiO solid solutions (0.0 ≤ x ≤ 0.05).

In this study, the synthesis and structural evolution of pure BaTiO and BaTiO co-doped with La and Bi, produced using the ball milling method and heat treatment, were analyzed. The starting materials included chemically pure precursor powders of BaCO, TiO, LaO and BiO. Stoichiometric calculations were performed using the BaLaTiBiO mechanism with concentrations x = 0.

Selenium and sulphur reactions involved in manganese reduction from sulphate solutions.

Electrochemical reduction of ionic species during manganese deposition from sulphated aqueous solutions has been studied in an electrochemical reactor with two anionic exchange membranes. Thermodynamic analysis, voltammetries, and chronopotentiometries were used to determine the reaction mechanism of the reductions developed, with the results demonstrating that the effect of the elemental selenium on the hydrogen evolution leads to the formation of elemental sulphur by reducing the sulphate ions with both membranes. It was also evident that in the range of -25 to -50 A m the electrodeposition of metallic manganese begins, with minimal interference from parasitic reactions.

Synthesis of UV-11 MOF and Its Characterization by Cyclic Voltammetry.

In this work a Metal-Organic Framework (MOF) was prepared using a solvothermal method, taking as precursors 1. 2-di-(4-pyridyl)-ethylene, 1.2.

Blood toxic metals and hemoglobin levels in Mexican children.

Metal toxicity can cause hematologic abnormalities and hemolysis. To evaluate the relationship of anemia with metal contamination in children, the following elements were quantified in dry blood: silicon, chromium, lead, titanium, vanadium, nickel, arsenic, manganese, and cadmium. A total of 88 samples of anemic children and 208 of non-anemic children aged 6-12 years were analyzed.