Atom probe tomography was utilized to measure directly the chemical compositions of Al(3)(Zr(1)-(x)Ti(x)) precipitates with a metastable L1(2) structure formed in Al-0.1Zr-0.1Ti (at.%) alloys upon aging at 375 degrees C or 425 degrees C. The alloys exhibit an inhomogeneous distribution of Al(3)(Zr(1)-(x)Ti(x)) precipitates, as a result of a nonuniform dendritic distribution of solute atoms afte...

 (Φp(ρ(t)x (t))) + q(t)f(t, x(t), x(t)) = 0, t 6= ti, t ∈ J, ∆x(ti) = Ii(x(ti)), −∆Φp(ρ(ti)x (ti)) = Ji(x(ti)), i = 1, 2, . . . , m, x(0) = ax(ξ), lim t→+∞ ρ(t)x(t) = 0, here J = [0,+∞), Φpx := |x| x, p > 1, 0 = t0 < t1 < · · · < tm < ∞, a > 0, 0 ≤ ξ <∞, aξ < 1, ρ, Ii, Ji, q, f satisfy the following assumptions (H1) ρ ∈ C[0,+∞) ∩ C(0,+∞), ρ(t) > 0 is increasing on [0,+∞), ∫∞ 0 1 ρ(t) dt <∞; (H...

the nanoparticles of ti and tio2 have attracted extensive research interest because of their diverse applications in, for instance, catalysis, energy conversion, pigment and cosmetic manufacturing and biomedical engineering. through this project, a one-step bulk synthesis method of electromagnetic levitational gas condensation (elgc) was utilized for the synthesis of monodispersed and crystalli...

The objective of this study was to investigate the effects of cryo-treatment on the microstructure, corrosion behavior, and mechanical properties of Ti before and after laser welding. The microstructure was studied by optical microscopy. It was found that the grain size for Ti became smaller after cryo-treatment. Cryo-treatment could also refine and stabilize the crystal lattice structure and d...

Lymphatic and venous systems work together to drain interstitial fluid and blood respectively. Data on lymphatic function in chronic venous insufficiency and in chronic venous ulcerations are discordant. Modification of lymphatic function in acute venous thrombosis have been never described. The aim of this study is to report the modifications of the function of the lymphatic system in acute ve...

We have proposed a combination of density functional theory calculations and interatomic potential-based simulations to study the structural, electronic, and mechanical properties of pure-silica zeolite Linde Type A (LTA), as well as two titanium-doped compositions. The energetics of the titanium distribution within the zeolite framework suggest that the inclusion of a second titanium atom with...

We report annealing studies using He-ion scattering spectroscopy (He-ISS) and X-ray photoelectron spectroscopy (XPS) to evaluate the thermal stability of ultrathin Ti films deposited on a Pt(111) single-crystal surface at 300 K. These results establish that strong Pt–Ti intermetallic bonding provides sufficient driving force for thermal interdiffusion of Ti and Pt at a (111)-oriented interface ...

OBJECTIVE To correlate the Thyroid Imaging Reporting and Data System (TI-RADS) and the Bethesda system in reporting cytopathology in 1,000 thyroid nodules. METHODS A retrospective study conducted from November 2011 to February 2014 that evaluated 1,000 thyroid nodules of 906 patients who underwent ultrasound exam and fine needle aspiration. RESULTS A significant association was found betwee...

background: titanium (ti) implants are commonly coated with hydroxyapatite (ha). however, ha has some disadvantages such as brittleness, low tensile strength and fracture toughness. it is desirable to combine the excellent mechanical properties of zro2 and the chemical inertness of al2o3 with respect to the purpose of this project which was coating ti implants with ha-zro2-al2o3 to modify the s...