The use of a liquid metal jet [1] as the primary target at a muon collider source is not yet an established technique. Among possible alternatives, we are investigating the use of a jet of tungsten powder. We first considered metal-powder slurries, based on the example of a commercial zinc paint with density 3 g/cm. For a muon collider target, both high atomic number and high density are desira...

Morphological and chemical characteristics were determined for airborne tungsten particles in Fallon, Nevada, a town that is distinguishable environmentally by elevated airborne tungsten and cobalt. From samples of airborne dust collected previously at six different places in Fallon, tungsten-rich dust particles were isolated and analyzed with automated electron microprobe and wavelength-disper...

INTRODUCTION Thermal changes can occur on the external root surface when root-end cavity preparation is performed, which may damage periodontal ligament cells and alveolar bone. OBJECTIVE The purpose of this study was to evaluate the temperature changes during preparation of the root-end cavities at 1 and 3 mm to the sectioned apical root surfaces when either tungsten carbide round bur, diamo...

Trace metal content was measured in airborne particulates in Wve towns located in west central Nevada with an emphasis on Fallon, where 16 cases of childhood leukemia were diagnosed recently. Airborne dust samples were collected using portable, high-volume particulate air samplers, and each Wlter was chemically analyzed by acid-dissolution, inductively coupled plasma mass spectroscopy. Tungsten...

The influence of boron carbide and tungsten on the apparent porosity, density, coercive force, hardness microstructure metal matrix com

introduction a large number of orthodontists prefer to rebond the failed bonded brackets or use recycled brackets in some instances. the aim of this study was to compare the shear bond strength of rebonding with using recycled brackets on enamel surface. methods bonding of brackets on the surface of extracted first bicuspids was tested in five different groups to compare their shear bond streng...