The Guangxi Zhuang Autonomous Region is an important manganese ore district in Southwest China, with resource reserves accounting for 23% of the total China. Xialei deposit (Daxin County, Guangxi) first super-large discovered Mn oxide supergene oxidation zone was characterized using scanning electron microscopy (SEM), energy spectrometer (EDS), transmission (TEM, HRTEM), and X-ray diffraction a...

The effect of 2-methyl pyridine N-oxide, 4-methyl pyridine N-oxide, pyridine N-oxide, 8-aminoquinoline, dibenzyl sulfoxide on the extraction of manganese(II) by 4-benzoyl-3-methyl-1-phe-' nyl-5-pyrazolone (BMPP) in benzene from an aqueous buffered solution was studied. Synergistic enhancement was observed in all systems. Equilibrtum extraction constants and adduct formation constants were calcu...

Abiotic conversion of the reactive nitrification intermediate hydroxylamine (NH2OH) to nitrous oxide (N2O) is a possible mechanism of N2O formation during nitrification. Previous research has demonstrated that manganese dioxide (MnO2) and organic matter (OM) content of soil as well as soil pH are important control variables of N2O formation in the soil. But until now, their combined effect on a...

The effects of low-temperature annealing and oxidation of the dilute magnetic semiconductor Ga1−xMnxAs are studied by photoemission spectroscopy in the hard x-ray regime HAXPES , with special attention to the depth profile of both concentration and chemical state of manganese. Annealing of Ga1−xMnxAs in air at 190 °C for up to 150 h leads to an enrichment of manganese at the surface accompanied...

Nanoparticles of un-doped, 5%, 10%, 15% Mn doped TiO2 were prepared by the sol-gel technique by adding different proportions of Manganese to the Titanium dioxide and characterized using XRD and SEM. This increase in doping proportion of Mn in the oxide material reduced the band gap to a larger extent, so this material is activated under visible light. As the doping level of Manganese increased,...

Since metals are cable of catalysing the free radical reactions, different metal (Mg, Mn, Zn) compounds were studied to determine their hydroxyl radical generating and/or scavenging abilities depending on ligand in a H2O2/OH -luminol system with or without microperoxidase. Magnesium oxide, magnesium gluconate and manganese gluconate increase the free radical reactions in the H2O2/OH -luminol sy...

This dissertation reports on the synthesis, structural and thermal characterization and electrical and thermal transport properties of a variety of strongly correlated spinels. General structure property relationships for electrical and thermal transport are discussed. However, the relationship between thermopower and features of the crystal structure such as spin, crystal field, anti-site diso...

OBJECTIVE To investigate the association of endothelial nitric oxide synthase (NOS), inducible NOS, manganese superoxide dismutase (SOD), and extracellular SOD gene polymorphisms with susceptibility to Behçet disease (BD) in Japan. METHODS Seventy-eight consecutive Japanese patients with BD and 107 healthy control subjects were genotyped by polymerase chain reaction or polymerase chain reacti...

Emara, A. M., El-Ghawabi, S. H., Madkour, 0. I., and El-Samra, G. H. (1971). Brit. J. industr. Med., 28, 78-82. Chronic manganese poisoning in the dry battery industry. A survey was carried out on 36 workers in the dry battery industry exposed to dust containing 65 to 70% manganese oxide. Eight (22 2%) were found to have neuropsychiatric manifestations, six (16.6%) had chronic manganese psychos...