BACKGROUND Ultrafine particles have been hypothesised to be an important contributing factor in the toxicity and adverse health effects of particulate air pollution (PM10) and nanoparticles are used increasingly in industrial processes. AIMS To compare the ability of ultrafine and fine particles of titanium dioxide and carbon black to induce inflammation, cause epithelial injury, and affect t...

The application of titanium dioxide as an oxidant in tandem oxidation type processes is described. Under microwave irradiation, quinoxalines have been synthesized in good yields from the corresponding alpha-hydroxyketones.

Nanosized titanium dioxide (nano-TiO2) particles are used in diverse products and devices, including photocatalytic water splitting and solar cells whose successful commercialization is still facing scientific and technologi-

Ethionamide is a yellow crystalline, nonhygroscopic compound with a faint to moderate sulfide odor and a melting point of 162°C. It is practically insoluble in water and ether, but soluble in methanol and ethanol. It has a partition coefficient (octanol/water) Log P value of 0.3699. Trecator tablets contain 250 mg of ethionamide. The inactive ingredients present are croscarmellose sodium, FD&C ...

the combustion process of tio2- 2mg- c and 3tio2-4al-3c systems in a tubular furnace was investigated. tic has been synthesized by the magnesiothermic reaction from a mixture of compacted powders of tio2, mg and charcoal as starting materials in the presence and absence of nacl. the effects of temperature, pressure, and the stoichiometry ratio in the reaction yield have been studied. the result...

Each MERIDIA capsule contains 5 mg, 10 mg, and 15 mg of sibutramine hydrochloride monohydrate. It also contains as inactive ingredients: lactose monohydrate, NF; microcrystalline cellulose, NF; colloidal silicon dioxide, NF; and magnesium stearate, NF in a hard-gelatin capsule [which contains titanium dioxide, USP; gelatin; FD&C Blue No. 2 (5and 10-mg capsules only); D&C Yellow No. 10 (5and 15-...

The results of a study of the photocatalytic oxidation of uichloroethylene (TCE) in air using titanium dioxide as the catalyst are reported. Dichloroacetyl chloride is found to be an intermediate in the oxidation sequence and carbon monoxide, phosgene, carbon dioxide, hydrogen chloride, and chlorine are found in the product mixture. The yields of each, except chlorine, have been determined usin...

The refractive index of nanoparticles dispersed in water is measured, using the total internal reflection method. The critical angle is determined by the disappearance of diffraction orders from a metal grating. The investigated nanoparticles are titanium dioxide (anatase phase), (35 nm diameter), zinc oxide, (<50 nm diameter), zirconium dioxide, (<100 nm diameter). The refractive index is meas...