BACKGROUND Radiostereometric analysis (RSA) is often used for evaluating implanted devices over time. Following patients who have had tantalum beads implanted as markers in conjunction with joint replacements is important for longitudinal evaluation of these patients and for those with similar implants. As doing traditional RSA imaging is exacting and limited to specialized centers, it is impor...

Carbon nanotubes used as fillers in composite materials are more and more appreciated for the outstanding range of accessible properties and functionalities they generate in numerous domains of nanotechnologies. In the framework of biological and medical sciences, and particularly for orthopedic applications and devices (prostheses, implants, surgical instruments, …), titanium substrates covere...

FOR as lonig as operative interferenice is necessary in glaucoma, so I suppose w,ill ophthcaliic surgeons try to devise newx ways of reducinig intra-ocular tension by drainage. Recently the reading of an article (Bick, 1949) oni the use of tantalum metal in drainage of the eve, lhas tenmpted imie to submit thils brief account of some efforts on my own part over the last fewx years to achieve su...

HAVING read Mr. Harold Ridley's article on " Further Experiences of Intraocular Acrylic Lens Surgery " (Ridley, 1954), one cannot but feel on reflection that this great advance in cataract surgery is bound, in time, to become an accepted procedure within the capabilities of any ophthalmic surgeon. Any modification of it, therefore, which would tend to make it simpler or safer, should perhaps he...

Spin currents can apply useful torques in spintronic devices. The spin Hall effect has been proposed as a source of spin current, but its modest strength has limited its usefulness. We report a giant spin Hall effect (SHE) in β-tantalum that generates spin currents intense enough to induce efficient spin-torque switching of ferromagnets at room temperature. We quantify this SHE by three indepen...

Crystals of di-μ-bromido-bis-[tetra-bromidotantalum(V)], (TaBr(5))(2), were obtained by recrystallization at 773 K. A first crystal structure study of (TaBr(5))(2) was reported by Rolsten [J. Am. Chem. Soc. (1958) ▶, 80, 2952-2953], who analysed the powder diffraction pattern and came to the conclusion that it crystallizes isotypically with (NbBr(5))(2) in a primitive ortho-rhom-bic cell. These...