Fo ram apli ca das ro ti nas com bi na das de po ten ci al, en vol ven do var re du ras vol ta mé tri cas e pa ra das de po ten ci al, na re gião dos ad-átomos de hi dro gê nio so bre ele tro dos de Pt, em di fe ren tes so lu ções áci das, para pro du zir um au men to da cor ren te de pico da ele tro-desorção do “ter ce i ro” áto mo de hi dro gê nio que apa re ce cer ca de 0.22 V vs. RHE. Este ...

Mineral analysis of forage from a nitrogen (N) fertilizer, field study produced unexpectedly high iron (Fe) concentrations which were correlated with the N fertilizer level (r2=.92) and the percentage N in the forage (r2 =.94). The high Fe values were presumed to be associated with dust on the leaves. The objective of this study was to determine the level of soil contamination on the forage sam...

One of the main challenges for synthesis and application promising hard-magnetic compound $\mathrm{Ce}{\mathrm{Fe}}_{11}\mathrm{Ti}$ is formation Laves phases that are detrimental their thermodynamic stability magnetic properties. In this paper, we present an ab initio based approach to modify these in Ce-Fe-Ti system by additions $3d$ $4d$ elements. We combine highly accurate free-energy calcu...

We present measurements of Fe, Mg, Si, Ca, and Ti abundances for 388 radial velocity member stars in the Sculptor dwarf spheroidal galaxy (dSph), a satellite of the Milky Way. This is the largest sample of individual α element (Mg, Si, Ca, Ti) abundance measurements in any single dSph. The measurements are made from Keck/DEIMOS medium-resolution spectra (6400–9000 Å, R ∼ 6500). Based on compari...

The relative abundances of the Fe-peak elements (Ti–Zn) at the lowest metallicities are intimately linked to the physics of core-collapse supernova explosions. With a sample of 25 very metal poor damped Lyα systems (DLAs), we investigate the trends of the Fe-peak element ratios with metallicity. For nine of the 25 DLAs, a direct measurement (or useful upper limit) of one or more of the Ti, Cr, ...