Andrei Malashevich,1,2,* Sinisa Coh,1,2 Ivo Souza,3,4 and David Vanderbilt5 1Department of Physics, University of California, Berkeley, California 94720, USA 2Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA 3Centro de Fı́sica de Materiales (CSIC) and DIPC, Universidad del Paı́s Vasco, 20018 San Sebastián, Spain 4Ikerbasque Foundation, 48011 Bilb...

Although its value varies with the microstructure, hysteresis always accompanies hydride formation and decomposition in Pd(pure)-H, e.g., it is present even in nano-crystalline and thin films. Internal oxidation of Pd0.93Cr0.07 alloys leads to a pure Pd matrix containing nano-crystalline chromia precipitates. The characteristic hysteresis of Pd-H almost disappears in this form of Pd. The reason...

A major reason for the departure of core level X-ray photoelectron spectra ~XPS! of transition metal cations in oxides from the predictions of atomic models is shown to arise from ligand field splittings in the initial state of photoemission. This splitting often leads to a change in the spatial degeneracy of the initial state but the consequences of this for XPS have not been explicitly identi...

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An equimolar mixtures of starting ZnO and Cr2O3 powders were mechanically activated by grinding using a planetary ball mill for various periods of time (40 to 320 minutes). Formation of nanocrystalline ZnCr2O4 as normal spinel structure at room temperature is detected in all samples after ball-milling. A detailed XRD structural analysis (lattice parameters, site occupancy, the average primary c...

Chromium oxide (α-Cr2O3) thin films were prepared using thermal annealing of chromium (Cr)films deposited on quartz substrates by direct current (DC) magnetron sputtering. The annealingprocess of the films was performed for different times of 60, 120,180 and 240 min. The influenceof annealing time on structural, morphological and optical properties of the prepared films wasinvestigated by diffe...

biotin is a water-soluble vitamin and co-factor for activation of carboxylases apoenzymes. biotinidase enzyme is essential for release of biotin from apoenzymes. absence of biotinidase is an autosomal recessive trait with a prevalence of 1 in 60000. clinical manifestations of biotinidase deficiency include dermatitis, alopecia, seizures, hypotonia, developmental delay, hearing loss, visual impa...

background: patients with gastroesophageal reflux disease (gerd) unresponsive to proton pump inhibitor (ppi) therapy are often labeled as having refractory gerd. one of the probable etiologies of refractory gerd is delayed gastric emptying. refractory gerd associated with gastroparesis is a complex condition with no definitive treatment to date. we opted, for the first time, to test the hypothe...