A method for measuring unlabelled Fe absorption has been investigated in a pilot study using a simple mathematical model. The metabolism of newly absorbed Fe can be approximated as a single-compartment model with the sampled compartment being the plasma pool. Five female volunteers (aged 30-55 years) were recruited to participate in the pilot study. After a 10 mg oral dose of unlabelled ferrous...

A new method to correlate intrinsic reactivity and treatability efficiency of metallic iron (Fe) was evaluated. A 2.0 mg L methylene blue (MB) solution was used in gravity fed column experiments. The intrinsic reactivity of nine Fe materials (ten samples) was characterized using the EDTA test. Three commercial Fe materials ZVI1 (0.40 0.80 mm), ZVI9 (0.50 mm) and ZVI10 (0.45 0.55 mm) were tested...

Using Embedded-atom-method (EAM) potential, we have performed in detail molecular dynamics studies on a Fe adatom adsorption and diffusion dynamics on three low miller index surfaces, Fe (110), Fe (001), and Fe (111). Our results present that adatom adsorption energies and diffusion barriers on these surfaces have similar monotonic trend: adsorption energies, Ea(110) < Ea(001) < Ea(111), diffus...

Two analytical methods, which prove the utility of a potentiometric flow injection technique for determining various redox species, based on the use of some redox potential buffers, are reviewed. The first is a potentiometric flow injection method in which a redox couple such as Fe(III)-Fe(II), Fe(CN)(6) (3-)-Fe(CN)(CN)(6) (4-), and bromide-bromine and a redox electrode or a combined platinum-b...

Many structural components can be regarded as waveguides. They are uniform in one direction so that the cross section of the waveguide has the same physical and geometric properties at all points along the axis of the waveguide. In this paper a method is presented to calculate the forced response of such a structure using a combination of wave and finite element (FE) approaches. The method invo...

We derive the absolute magnitude of RR Lyrae stars by two independent maximum-likelihood estimations , using Hipparcos proper motion and par-allax data, respectively. By applying the statistical parallax method to 99 Halo RR Lyrae stars, we obtain the mean absolute magnitude < M V > = 0:69 0:10 at ={1.58. Independently of this method, we furthermore derive the M V { Fe/H] relation from H...

The ability to quantify the chemical and physical forms of transition metals in atmospheric particulate matter (PM) is essential in determining potential human health and ecological effects. A method for the speciation of iron in atmospheric PM has been adapted which involves extraction in a well-defined solution followed by oxidation state specific detection. The method was applied to a suite ...

Fe-Cr alloy layers on Fe 001 substrates with different atomic environments are theoretically investigated through a self-consistent real-space tight-binding method parametrized to density functional theory and without collinear restriction for the spin directions. We show that the intermixing at the Cr/Fe interface, experimentally observed at the first stages of the Cr growth on Fe, originates ...

A simple, rapid and sensitive spectrophotometric method has been developed for the determination of Fe (II) by using N (o methoxy benzaldehyde) 2 aminophenol (NOMBAP) as an analytical reagent. NOMBAP has been synthesized and characterized by elemental and spectral analysis. NOMBAP extracts Fe (II) quantitatively (99.67%) into ethyl acetate from an aqueous solution of pH range 5.6 6.8. The ethyl...

The Dirac spin liquid ground state of the spin 1/2 Heisenberg kagome antiferromagnet has potential instabilities. This has been suggested as the reason why it does not emerge as the ground state in large-scale numerical calculations. However, previous attempts to observe these instabilities have failed. We report on the discovery of a projected BCS state with lower energy than the projected Dir...