In redox-dynamic soils, iron reduction-oxidation events may initiate wide shifts in the concentration of colloidal and dissolved material because of either Fe mineral dissolution or pH shifts associated with Fe oxidation state changes. This can have profound effects on the mobilization of organic and metal constituents. We conducted laboratory studies of colloid dynamics in a Hawaiian soil subj...

Rapid development of automotive industry brings also increased requirements for sheets properties, involving relatively high strength and good formability together with excellent corrosion resistance. Increasing requests for corrosion resistance lead to the production of coated car parts, protected mainly by zinc coatings. Whereas, majority of European producers of passenger cars use preferenti...

Oxidation of low density lipoprotein (LDL) has been strongly implicated in the phathogenesis of atherosclerosis. The use of oxidants in dietary food stuff may lead to the production of oxidized LDL and may increase both the development and the progression of atherosclerosis. The present work investigated the effects of some elements including: copper (Cu), iron (Fe), vanadium (V) and titanium (...

Abstract We present a fundamentally different approach to process the bimodal Ti-based alloy (Ti-Nb-Fe-Co-Al) by semi-solid sintering stemmed from hypoeutectic reaction, aiming at achieving ultrafine eutectic structure, β-Ti and micron-sized dispersed phase with strengthening effect. As expected, microstructure of processed Ti-Nb-Fe-Co-Al contains local structure (β-Ti TiFe), residual equiaxed ...

In the paper, Ti-18Nb-5X (X = Mo and Sn) Ti-33Nb-2X Al, Sn, Fe Mo) alloys were investigated to evaluate effects of Mo, Sn doping different heat treatments on properties microstructures Ti-Nb-based alloys. The results show that Al decreased volume ?M in water-quenched Ti-33Nb-2Al alloy promoted formation ? phase furnace-cooled alloy. Fe-doping was proven stabilize phase. Sn-doping plays a compli...

We present high resolution, high SNR spectra of the QSO Q2206-199 obtained with HIRES on the 10m W.M. Keck Telescope. Our analysis focuses on the two previously identified damped Lyα systems found at z = 1.920 and z = 2.076. For the z = 1.920 system, we measure accurate abundances (relative to solar) for Fe, Cr Si, Ni, Ti, and Zn: [Fe/H] = −0.705 ± 0.097, [Cr/H] = −0.580 ± 0.100, [Si/H] = −0.40...

High resolution (R = 60 000), high S/N spectra have been obtained for 13 halo stars and 16 disk stars with 5400 <∼ Teff <∼ 6500 K, 4.0 <∼ logg <∼ 4.6 and overlapping metallicities in the range −1.3 <∼ [Fe/H] <∼ −0.5. Equivalent widths of weak Fe i and Fe ii lines are used to determine differential values of Teff and logg. Relative abundances of O, Na, Mg, Si, Ca, Ti, Cr, Fe, Ni, Y andBa are det...

We study the effects of neutron captures in AGB stars on “Fe-group” elements, with an emphasis on Cr, Fe, and Ni. These elements show anomalies in Cr, Fe, and Ni in solar-system materials, which are commonly attributed to SNe. However, as large fractions of the interstellar medium (ISM) were reprocessed in AGB stars, these elements were reprocessed, too. We calculate the effects of such reproce...