Wide bandgap semiconductors have expanded the scope of device applications beyond those of silicon and gallium arsenide. Exploitation of wide bandgap semiconductors holds promise for revolutionary improvements in the cost, size, weight and performance of a broad range of military and commercial microelectronic and opto-electronic systems. The inherent material properties of silicon carbide, gal...

Preparing dry specimens from liquid samples for XRF analysis avoids introducing caustic or hazardous liquids into the instrument. Several modifications were made to a dried residue specimen preparation method for quantifying gallium in plutonium metal in order to improve the method accuracy and precision. Ion exchange chromatography was utilized to remove the plutonium prior to casting the drie...

In this article, we estimate hydrostatic stress developed in gallium ion implanted gallium nitride epitaxial layers using Raman measurements. We have calculated deformation potential constants for E2(high) mode in these epi-layers. The presence of a polar phonon-plasmon coupling in these systems has also been demonstrated. In as-implanted samples, with an increase in implantation fluence, we ha...

CT and MR imaging of the brain and gallium-67 scintigraphy showed an enhancing, gallium-avid mass in the left middle cranial fossa of a 10-year-old girl. Craniotomy revealed an inflammatory mass related to the left trigeminal nerve. The lesion contained rodlike bacteria, and serologic tests were positive for cat-scratch disease. Neurologic involvement in cat-scratch disease is uncommon, and the...

In order to obtain an insight into the mechanism of experimentally induced redifferentiation of cancer cells, changes in negative charge of the cell membrane were examined by cytopherometry following in vitro exposure of the cancer cells to non-radioactive gallium. Reduction of the negative charge was observed at 24 hr and later. The gallium ions must have neutralized the negative charge of the...

Tripodal hexadentate hydroxypyridin-4-ones are increasingly utilised as iron(III) and gallium(III) ligands, their attachment to proteins being particularly useful for positron emission tomography (PET). A widely studied tripodal ligand NTA(BuHP)3, which is reported to form 1:1 iron(III) and gallium(III) complexes in aqueous, media forms 2:2 complexes under physiological conditions. This importa...