Inhalation of Beryllium (Be) dust, or its vapors or compounds, or subcutaneous implantation of Beryllium can lead to either acute or chronic beryllium disease, also known as berylliosis. It can affect genetically susceptible individuals or workers exposed to the fumes or vapors of the metal. It was first described by Hardy and Tabershaw in 1946. Beryllium can cause either an immediate acute for...

652 in dust and air, and this increased exposure can lead to a sensitization against this metal, even in very low doses, with risk of allergic reaction, especially in susceptible individuals. Several authors have described reactions both to nickel and palladium ions,[1-3] which has led to the thinking that the reaction is not dependent on the element itself but rather on the formation of comple...

The trifluoromethylation of aryl iodides catalyzed by copper(I) salt with trifluoromethylzinc reagent prepared in situ from trifluoromethyl iodide and Zn dust was accomplished. The catalytic reactions proceeded under mild reaction conditions, providing the corresponding aromatic trifluoromethylated products in moderate to high yields. The advantage of this method is that additives such as metal...

Inhalation of Beryllium (Be) dust, or its vapors or compounds, or subcutaneous implantation of Beryllium can lead to either acute or chronic beryllium disease, also known as berylliosis. It can affect genetically susceptible individuals or workers exposed to the fumes or vapors of the metal. It was first described by Hardy and Tabershaw in 1946. Beryllium can cause either an immediate acute for...

This paper presents the results of a Spitzer IRAC 3−8 μm photometric search for warm dust orbiting 17 nearby, metal-rich white dwarfs, 15 of which apparently have hydrogen dominated atmospheres (type DAZ). G166-58, G29-38, and GD 362 manifest excess emission in their IRAC fluxes and the latter two are known to harbor dust grains warm enough to radiate detectable emission at near-infrared wavele...

The recycling of printed circuit boards in Guiyu, China, a village intensely involved in e-waste processing, may present a significant environmental and human health risk. To evaluate the extent of heavy metals (Cd, Co, Cr, Cu, Ni, Pb, Zn) contamination from printed circuit board recycling, surface dust samples were collected from recycling workshops, adjacent roads, a schoolyard, and an outdoo...

We report on the design and testing of a compact impact-ionization time-of-flight mass spectrometer for analysis of cosmic dust, suitable for use on deep space missions. The instrument, Dustbuster, incorporates a large target area with a reflectron, simultaneously optimizing mass resolution, particle detection, and ion collection. Dust particles hit the 65-cm target plate and are partially ioni...

We present global spectral energy distributions (SEDs) from 0.3μm to 90 cm for a sample of seven low-metallicity blue compact dwarf galaxies (BCDs). In addition to data compiled from the literature, we report new SCUBA data for the galaxies in the sample, including the two most metal-poor star-forming galaxies known, I Zw18 and SBS 0335−052. The standard starburst templates, M82 and Arp 220, do...

Spatial patterns of tungsten and cobalt are described for surface dust of Fallon, Nevada, where a cluster of childhood leukemia has been ongoing since 1997. In earlier research, airborne tungsten and cobalt was shown to be elevated in total suspended particulates in Fallon. To fine-tune the spatial patterns of tungsten and cobalt deposition in Fallon, surface dust was collected in a grid patter...

the flame propagation through a coal dust-air mixture in a spherical vessel was studied by means of a one-dimensional, arrhenius-type kinetics and quasi-steady model. the model includes the evaporation of the volatile matter of dust particles into a known gaseous fuel (methane) and the single-stage reaction of the gas-phase combustion. effect of venting devices as safety idea and the radiation ...