The creep response in the air of commercially pure titanium was investigated at 550, 600, and 650 °C to assess effect oxidation on mechanical response. Experiments demonstrated that prolonged exposures high temperatures produced a marked reduction minimum rate under given applied stress. Microhardness measurements showed hardened zone formed proximity surface due oxygen penetration into metal. ...

OBJECTIVES Acid etching is a popular method to texture the surface of dental implants. During etching, the titanium oxide protective layer is dissolved and small native hydrogen ions diffuse into the unprotected implant surface. They enrich the implant surface with hydrogen and precipitate into titanium hydride (TiH). The aim of this study was to measure the concentration of TiH at the implant ...

A new class of cyclopentadiene-bis(oxazoline) compounds and their piano-stool-type organometallic complexes have been prepared as catalysts for hydroamination of aminoalkenes. The two compounds MeC(Ox)2C5H5 (BoCpH; Ox = 4,4-dimethyl-2-oxazoline) and MeC(Ox)2C5Me4H (Bo CpH) are synthesized from C5R4HI (R = H, Me) and MeC(Ox)2Li. These cyclopentadienebis(oxazolines) are converted into ligands tha...

Gas-phase photoelectron spectroscopy and density functional theory have been used to investigate the interactions between the sulfur pi-orbitals of arene dithiolates and high-valent transition metals as minimum molecular models of the active site features of pyranopterin MoW enzymes. The compounds (Tp*)MoO(bdt) (compound 1), Cp(2)Mo(bdt) (compound 2), and Cp(2)Ti(bdt) (compound 3) [where Tp* is...

The disciplinary actions taken by school building administrators after receiving a discipline referral were examined ti identify evidence of race and gender bias in administration of corporal punishment (CP). The relationships between race and CP, and gender and CP, were examined after controlling for the severity and frequency of punishable behaviors by students in each group. Analyses of disc...

This study produced non-equiatomic TiNbZrTaMn and TiNbZrTaMo high entropy alloy (HEAs) by argon arc-melting heat-treated for microstructural homogenization. The phase composition, microstructure, selected mechanical properties were measured compared with theoretical predictions. Additionally, electrochemical cytotoxicity tests evaluated their potential applicability use as biomaterials. X-ray d...

Titanium has been one of the traditional metals used in medical industry since 1940. This work modeled and simulated a hip-joint replacement implant using Creo 5.0 DEFORM 3D (v11.0), respectively. Four titanium-based billets were modeled; out four billets, three coated with specified thickness, was uncoated. Among billet 500-micron two 1000-micron thickness. At end simulation, coating materials...

resulted in improved ileal true digestibility (TD) of protein. Petroleum spirit-extracted dehulled soybean (TI 58.4 mg/g DM) was adjusted to 780 g/kg DM and heated alone or with either sodium metabisulphite (11.8 g/kg DM) or cysteine (15 g/kg DM) for 25, 35, 55 or 75 minutes at 95C. Reactive SH, determined by reaction with 4-vinyl pyridine and HPLC separation, was increased by C and S and decre...