Reactive oxygen intermediates (e.g., superoxide [O2-]) generated by microglia may play a role in host defense and injury within the central nervous system. We investigated the effect of cytokines on human microglial cell O2- production on stimulation with phorbol myristate acetate. Priming of microglial cell cultures with interferon-gamma or tumor necrosis factor-alpha resulted in a dose- and t...

Aim: The aim of this study is to find an optimum material to protect garment for protection against 99Tcm radionuclide.Materials and Methods: Monte Carlo simulation code was applied to investigate radiation attenuation of 13 shielding materials including: Ba, gray Sn, white Sn, Sb, Bi, Bi2O3, BaSO4, Sn/W, Sb/W, Pb and W with thicknesses of 0.5 and 1 mm to determine an optimum protective garment...

New regulations by the California Air Resources Board (CARB) demand a stringent 0.02 g/hp-hr tailpipe NO x limit year 2027, requiring Selective Catalytic Reduction (SCR) catalysts to provide high conversions even at low (below 200°C) exhaust temperatures. This work describes utilizing an Electrically Heated Mixer System (EHM system) upstream of Light-Off (LO-SCR) catalyst followed conventional ...

PURPOSE To compare the degree of MR contrast enhancement of 0.5 T and 2.0 T in various brain tumors. METHODS MR images were studied prospectively in each of 31 patients with brain tumors (11 gliomas, 6 meningiomas, 6 neurinomas, and 8 others) before and after intravenous injection of gadopentetate dimeglumine. In every patient, both 0.5-T and 2.0-T MR studies were done within 1 week. Each pat...

The thermo-hydraulic behavior of the air flow over a two dimensional ribbed channel wasnumerically investigated in various rib-width ratio configurations (B/H=0.5-1.75) atdifferent Reynolds numbers, ranging from 6000 to 18000. The capability of differentturbulence models, including standard k-ε, RNG k-ε, standard k-ω, and SST k-ω, inpredicting the heat transfer rate was compared with the experi...

This paper is concerned with the type analysis of logic programs where, by type, we mean a property closed under instantiation. We define a chain of abstractions from Herbrand constraints to logical formulas via the set of their solutions. Every step of the chain is an instance of abstract interpretation. The use of logical formulas for type analysis is a generalization of the traditional Boole...

Delayed Ettringite Formation (DEF), is one of the different Internal Sulfate Attack (ISA), a slow chemical reaction that can be responsible for degradation cementitious materials, through swelling material followed by crack diffusion in structure. The objective this study experimental characterization at local scale (10 x 10 30 mm3 samples) concrete reached DEF. composite samples, consist 15 mm...