Manganese serves as a cofactor to a variety of proteins necessary for proper bodily development and function. However, an overabundance of Mn in the brain can result in manganism, a neurological condition resembling Parkinson's disease (PD). Bulk sample measurement techniques have identified the globus pallidus and thalamus as targets of Mn accumulation in the brain, however smaller structures/...

Dirami, Ghenima, Donald Massaro, and Linda Biadasz Clerch. Regulation of lung manganese superoxide dismutase: species variation in response to lipopolysaccharide. Am. J. Physiol. 276 (Lung Cell. Mol. Physiol. 20): L705–L708, 1999.—Lipopolysaccharide (LPS) treatment increases survival of rats, but not of mice, during hyperoxia. Manganese superoxide dismutase (Mn SOD) in the lung plays a critical...

This study was undertaken in order to examine whether any connection existed between the amounts of iron in forage and the sporadic occurrence of scrapie observed in certain parts of Iceland. As iron and manganese are considered antagonistic in plants, calculation of the Fe/Mn ratios was also included by using results from Mn determination earlier performed in the same samples. Forage samples (...

CaMnO(3) and Ca(2)Mn(3)O(8) were synthesized and characterized by SEM, XRD, FTIR and BET. Both oxides showed oxygen evolution activity in the presence of oxone, cerium(IV) ammonium nitrate and H(2)O(2). Oxygen evolution from water during irradiation with visible light (λ > 400 nm) was also observed upon adding these manganese oxides to an aqueous solution containing tris(2,2'-bipyridyl) rutheni...

This paper reports on the analytical application of the oxidation reaction of [Os(bpy)3]2+ by Mn7+ (MnO4-). The present study developed a very simple, sensitive and selective spectrophotometric method for the determination of manganese in an acidic medium. Three analytical wavelengths were employed in the UV and visible regions at 290, 315 and 480 nm. Beer's law was obeyed up to a concentration...

Sediment components and redox properties change with oxic/anoxic condition, which affect the environmental transport of perfluorooctane sulfonate (PFOS). Herein, the influence of oxic/anoxic condition on the variation of redox and residual components of sediments, where organic matter, iron and manganese oxides are separated from the original sediment collected from Lake Taihu, China, are inves...

Dilute solutions of MnCl(2) or MnSO(4) accelerate the lytic effect of phage upon susceptible staphylococci. Under the conditions of our experiments the manganese-containing mixtures lysed regularly 0.5 hour sooner than the controls. The effect is shown to be due to a lowering of the lytic threshold, i.e. the quantity of phage/bacterium requisite for lysis; Mn(++) reduces the ratio from 54 to ab...

Sodium manganese hexacyanomanganate, NaxMn[Mn(CN)6], is an electrochemically active Prussian blue analogue (PBA) that has been studied experimentally as electrode material in rechargeable sodium-ion batteries. It a reversible specific capacity of 209 mA h g–1, which substantially higher than the theoretical 172 g–1 expected for two reduction events conventional PBAs. suggested high originates f...

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Accelerated precipitation of Mn-rich rocks in the early Paleoproterozoic ocean is considered to reflect irreversible rise oxygen atmosphere during Great Oxidation Event (GOE), 2.501–2.220 billion years ago. But conditions, pathways, mechanisms, and linkages redox, broadly remain unresolved. The Lagoa do Riacho Mn deposit Borborema Province, northeastern Brazil, Ceará state, consists mainly mang...