Reactions of a well-characterized polycrystalline titanium surface with oxygen and water molecules at 150–850 K were studied in UHV by X-ray photoelectron spectroscopy ( XPS), thermal desorption spectroscopy (TDS) and Fourier transform reflectance–absorption infrared spectroscopy (FT-RAIRS). At 150 K, 2 oxidizes Ti0 to TiIV, TiIII and TiII, but Ti exposure to H2O at this temperature produces on...

Abstract In this work, Ti1-xAlxN (TiAlN) coatings were synthesized by low pressure chemical vapour deposition (LPCVD), and the influence of a rotational precursor gas supply on coating microstructure was studied. The TiAlN characterized using X-ray diffraction (XRD), scanning transmission electron microscopy (SEM TEM), backscattered (EBSD). It is shown that induces an oscillatory surface reacti...

-Iron nI for Ti TM substitution in the structure of pedogenic and synthetic anatase of up to Fe/ (Ti+Fe) 0.1 mol/mol was indicated by an increase in unit cell size as measured by XRD line shifts. MiSssbauerand electron paramagnetic resonance spectra at both, 298 K and 4.2 K supported this by the presence of signals typical for octahedrally coordinated Fe I11 in a diamagnetic matrix. Charge comp...

PURPOSE Commercially pure titanium (CP Ti) has been recognized in dentistry for its biocompatibility, good mechanical properties and corrosion resistance. Conventional manufacturing processes can affect surface quality and result in poor bonding of dental ceramics to CP Ti. This is why powder metallurgy (P/M) and wire electro-discharge machining (WEDM) are being introduced in the manufacturing ...

conclusions there was insignificant correlation between serum hepcidin and ferritin levels in the two groups of patients with tm and ti. it seems that regulation of hepcidin in patients with thalassemia is more affected by erythropoeitic activity than iron stores. also, hepcidin levels were significantly higher in patients with tm than ti, possibly due to higher erythropoeitic activity in ti. i...

We consider the problem of non-negative super-resolution, which concerns reconstructing a signal x=?i=1kai?ti from m samples its convolution with window function ?(s?t), form y(sj)=?i=1kai?(sj?ti)+?j, where ?j indicates an inexactness in sample value. first show that x is unique measure consistent samples, provided are exact. Moreover, we characterise solutions xˆ within bound ?j=1m?j2??2. inte...

Since the 1970s, different comparative studies have tried to answer this question. The two randomized, prospective multicenter trials with the largest sample size to date have been published during the last 5 years. In the first of them, Terragni et al. included 419 patients, of which 209 were randomized to early tracheotomy (after 6--8 days of translaryngeal intubation [TI]) and 210 to late tr...

in some long term studies, a series of dependent and possibly truncated life-times may be observed. suppose that the lifetimes have a common marginal distribution function. in left-truncation model, one observes data (xi,ti) only, when ti ≤ xi. under some regularity conditions, we provide a strong representation of the ßn estimator of ß = p(ti ≤ xi), in the form of an average of random variable...