Magnetic moments of Co(N)Mn(M) and Co(N)V(M) clusters (N < or = 60; M < or = N/3) are measured in molecular beams using the Stern-Gerlach deflection method. Surprisingly, the per atom average moments of Co(N)Mn(M) clusters are found to increase with Mn concentration, in contrast to bulk CoMn. The enhancement with Mn doping is found to be independent of cluster size and composition in the size r...

background: iron, manganese, and aluminum are three abundant metals on earth and their concentrations have increased in aquatic environments as a result of natural and industrial activities. this study was undertaken to report the median acute toxicity (lc50) and accumulation of the sub-lethal concentration (10% 96-h lc50) of iron (fe), manganese (mn) and aluminum (al) in kutum (rutilus kutum) ...

We report an energy gap for hole photoexcitation in ferromagnetic Ga(1-x)Mn(x)P that is tunable by Mn concentration (x < or = 0.06) and by compensation with Te donors. For x approximately 0.06, electrical transport is dominated by excitation across this gap above the Curie temperature (TC) of 60 K and by thermally activated hopping below TC. Magnetization measurements reveal a moment of 3.9 +/-...

Myeloid cells are a major source of superoxide and other oxygen metabolites. As a protective mechanism, cells express antioxidant enzymes including manganese superoxide dismutase (Mn-SOD), copper-zinc SOD (Cu/Zn-SOD), and glutathione peroxidase (GSX-PX). Even though hematopoietic cells are a major source of oxidants, little is known of their expression of antioxidants. We found that seven myelo...

Manganese (Mn) is a chain-breaking antioxidant in biological systems. The objective of the present study was to determine the optimal dose of Mn to reverse free radical-mediated oxidative damage on motility, viability, and lipid peroxidation (LPO) of sperm from five bulls (local crossbred cattle). Fresh semen was suspended in 2.9% sodium citrate, divided into equal fractions, and subjected to M...

In this study, bis(salicylaldehyde)-4-methyl-1,2-phenylenediimine (BSMP) as a Schiff base ligand of N2O2-type and its Mn and Fe complex as M-BSMP catalyst were synthesized and characterized by UV-Vis, IR spectroscopy and elemental analysis. The efficiency of Fe- and Mn-BSMP catalysts was evaluated in the oxidative decarboxylation of arylacetic acids with tetra...

The discovery of live 60 Fe in a deep-sea crust with proposed interstellar origin followed by evidence for elevated interplanetary 3 He the same raised question on how to unambiguously identify true production site identified Fe. Here, we show implementation dyadic radionuclide system / 53 Mn serve as tool identification surplus over production. recent updates experimental and data from iron me...

We perform total energy calculations on a manganese atom encapsulated inside a C(60) cage using density functional theory with the generalized gradient approximation through three optimization schemes and along four paths inside the cage. We find that when Mn is located in the central region, its electronic and magnetic properties are not exactly the same as those of a free Mn atom due to weak ...

OBJECTIVE To examine the role of antiretroviral drugs (ART), HIV-related and traditional risk factors on the incidence of chronic kidney disease (CKD) in HIV-infected patients. DESIGN Prospective hospital-based cohort of HIV-infected patients from 2004 to 2012. METHODS CKD was defined using MDRD equation as an estimated glomerular filtration rate (eGFR) less than 60 ml/mn/1.73 m(2) at 2 con...