Operating diamond grits to produce a precise grind tool is need. In order lift up grit by magnetic force, the flux was estimated be 100 μT/g. Diamond (110) surface modified with manganese powder at 450°C (720 K) then bismuth 270°C (540 due its low melting temperature. Manganese carbides were formed on which confirmed an X-ray diffraction. A magnet that exhibits ferrimagnetism surface, it had sp...

Blackening was observed on the surfaces of Mesopotamian clay tablets from Umma, Dilbat, Larsa, Ur, Babylon, Uruk, Sippar, and Nippur produced between the Third Dynasty of Ur and the Early Achaemenid Dynasty. Portable X-ray fluorescence analysis revealed that manganese was concentrated on the blackened surfaces. Rod-shaped materials with a length of 100 200 nm and a width of 30 nm were observed ...

long–term stability and oxidation resistance of aisi 439 ferritic stainless steel used as interconnects in solid oxide fuel cells can be improved by use of a protective coating. in this study the pack cementation method was employed to coat aisi 439 ferritic stainless steel with manganese. isothermal oxidation was conducted at 800 ºc for 200 hours in static air to investigate the role of coatin...

The removal of manganese and humic acid (HA) by two nanofiltration membranes, TFC-SR2 and TFC-SR3, was investigated in order to highlight the influence of speciation on manganese and HA retention. Manganese speciation and complexation with HA were modelled to understand how speciation could affect NF removal mechanisms. The behaviour of the two membranes was drastically different for manganese ...

We measured the manganese content of mononuclear blood cells and the manganese concentrations in whole blood and plasma from 31 healthy volunteers and 25 patients receiving total parenteral nutrition (TPN) (i.e., no dietary manganese). The manganese content (mean +/- 2 SD) of mononuclear blood cells and the manganese concentration in whole blood and plasma in the healthy volunteers were 8.84 +/...

-Bioremediation is the application of biological process principles to the treatment of groundwater, soil and sludge contaminated with hazardous chemicals. It requires the control and manipulation of microbial processes in surface reactors or in the subsurface. Of prime importance, microorganisms are capable of producing enzymes that will degrade the hazardous chemical (target compound) as enzy...

The noble shift in open-circuit potential exhibited by microbially colonized stainless steel (ennoblement) was investigated by examining the relationship among surface colonization, manganese deposition, and open-circuit potential for stainless steel coupons exposed to batch cultures of the manganese-depositing bacterium Leptothrix discophora. Open-circuit potential shifted from -100 to +330 mV...

In an attempt to search for mixed alkaline-earth and transition metal pyroborates, the title compound, barium manganese(II) pyroborate, has been synthesized by employing a flux method. The structure of BaMnB2O5 is composed of MnO5 square pyramids that form Mn2O8 dimers by edge-sharing and of pyroborate units ([B2O5]4-) that are composed of two corner-sharing trigonal-planar BO3 units. These bui...

A direct method is presented for the determination of manganese in whole blood or serum by atomic absorption spectroscopy, using a graphite furnace with a temperature ramp controller. Blood or serum is diluted with an equal volume of a five percent solution of Triton-X100 containing heparin. This prevents the blood from coagulating and produces a solution with a viscosity suitable for injection...

Concerns exist as to whether individuals may be at greater risk for neurotoxicity following increased manganese (Mn) oral intake. The goals of this study were to determine the equivalence of 3 methods of oral exposure and the rate (mg Mn/kg/day) of exposure. Adult male rats were allocated to control diet (10 ppm), high manganese diet (200 ppm), manganese-supplemented drinking water, and mangane...