The reduction of surface “native” oxides from GaAs substrates following reactions with trimethylaluminum TMA precursor is studied using medium energy ion scattering spectroscopy MEIS and x-ray photoelectron spectroscopy XPS . MEIS measurements after one single TMA pulse show that 65% of the native oxide is reduced, confirmed by XPS measurement, and a 5 Å thick oxygen-rich aluminum oxide layer i...

Changes in total volatile bases (TVB), dimethylamine (DMA), formaldehyde (FA), trimethylamine (TMA) and trimethylamine oxide (TMAO) of whole hake (Merluccius merluccius L.) were evaluated at different temperatures of storage: -5, -12 and -20°C. Significant changes in TVB, DMA, TMA, TMAO nitrogen and FA were observed at 5°C. Only TMAO changed significantly at -12°C and -20°C. TMAO decrease was n...

OBJECTIVE The current study aimed to investigate the spectrum of etiologies and associated disorders of renal biopsy-proven thrombotic microangiopathy (TMA) patients. METHODS The clinical, laboratory, and renal histopathological data of patients with renal TMA from 2000 to 2012 in our institute were collected and reviewed. RESULTS One hundred and nine TMA patients were enrolled in this stud...

High-resolution synchrotron radiation photoemission was employed to study the effects of atomic-layer-deposited trimethylaluminum (TMA) and water on Ga-rich GaAs(001)-4 × 6 and As-rich GaAs(001)-2 × 4 surfaces. No high charge states were found in either As 3d or Ga 3d core-level spectra before and after the deposition of the precursors. TMA adsorption does not disrupt the GaAs surface structure...

The aim of this study was to determine in patients with HCV genotype 2 or 3 the performance at week 4 of two assays with different sensitivities for HCV RNA detection, for the prediction of SVR and stratification for treatment duration (14 and 24 weeks). Recruitment was from two trials comparing 14 and 24 weeks treatment to patients with rapid virological response (RVR) (n = 550). RVR was origi...

Objective In this study, marginal and internal misfit and fracture load with and without thermal-mechanical aging (TMA) of monolithic ZLS and lithium disilicate (LDS) crowns were evaluated. Material and methods Crowns were milled using a computer-aided design/computer-aided manufacturing system. Marginal gaps (MGs), absolute marginal discrepancy (AMD), axial gaps, and occlusal gaps were measu...

An ab initio density functional theory method (DFT) with D3 dispersion corrections (DFT-D3) was employed to study the 64 possible models of structure hectorite intercalated tetramethylammonium (TMA) cations aim find additional information about for energetically most suitable mutual arrangement TMA cations. The complex analysis total energies showed small differences among structural lowest (L ...