At the Power Systems Development Facility (PSDF), a variety of filter elements and failsafes are being tested for the cleanup of coal-generated syngas from the Kellogg Brown and Root (KBR) Transport Gasifier. Through 2007, the maximum accumulated syngas exposure for each element type was: 9,959 hours for iron aluminide sintered metal powder elements; 8,249 hours for HR-160 sintered metal fiber ...

Whelks Thais clavigera were collected from field populations containing different concentrations of metallothioneins (MTs) or were pre-exposed to aqueous or dietary Cd in the laboratory to result in differential body MT concentrations. Cd, Hg and Zn uptake from the dissolved phase, assimilation efficiency from the dietary phase, and body burden were subsequently quantified. MT concentrations in...

Responsive lanthanide complexes demonstrate differentiated modulated luminescence output upon exposure to metal di-cations in aqueous solution.

Manganese (Mn) is found in three major biologically-relevant oxidation states Mn(II), Mn(III) and Mn(IV), and it is an essential trace metal that is involved for several pathway, in the normal cell function and metabolism. However, since XIX century, the Mn is well known as neuro (toxic) agent, during acute and chronic exposure for air, water or aliments containing either highor low-level conce...

Creatv MicroTech has developed unique fabrication techniques to make high precision, high-aspectratio metal microstructures to custom specifications. A lithography based fabrication method permits precise fabrication of various microstructures. Collimators and antiscatter grids with continuous, smooth, thin, parallel or focused septa have been fabricated using deep X-ray and optical lithography...

OBJECTIVES There are epidemiological studies indicating that exposure to metal fumes is a risk factor for infectious pneumonia. Whether occupational exposure to other agents, such as inorganic dust or chemicals, also increases the risk for infectious pneumonia is not clear. The aim of the present study was to elucidate whether occupational exposure to respiratory pollutants and irritants increa...

Classical experiments have demonstrated that Se compounds protect against the toxicity of several toxic metals in acute experiments with simultaneous parenteral administration of high doses of Se and the toxic metal. Blood and organ levels of the toxic metals were increased, conceivably due to formation of inert Se complexes. Less is known about effects of long-term Se status on the toxicokinet...