Band edges positions prediction of the of Ag nanocluster-decorated titania surfaces and their relationship to NO and NO interaction from first-principles calculations.

Metal nanoclusters deposited on oxides have been widely used in photocatalysis playing an important role in the design of model catalysts with applications in heterogeneous catalysis. In particular, we are interested in the potential activity of these cluster-supported systems for the removal of nitrogen oxides either by possible catalytic reduction and/or by their adsorption. In this work, using first-principles methods, we evaluate the main characteristics of Ag (n = 1-4) nanoclusters isolated and deposited on anatase TiO(101) and rutile TiO(110) surfaces.

Lindane poisonings.

One percent lindane, widely used to treat scabies and pediculosis, presents toxicologic problems when used excessively. A 16-year-old mentally retarded boy accidentally ingested approximately 392 g of 1% lindane shampoo and recovered. A 2-month-old, 4.

Body distribution of malathion and its metabolites in a fatal poisoning by ingestion.

Eight autopsy samples from an individual who had ingested a large amount of malathion were analyzed fo four components: intact pesticide, malaoxon, malathion monocarboxylic acid (MCA), and malathion dicarboxylic acid (DCA). Malathion was present in all samples except liver. Highest concentrations were found in the gastric contents (8621 ppm) and adipose tissue (76.

Reduction of pesticide exposure with protective clothing for applicators and mixers.

Systemic pesticide illness in agricultural workers may result from excessive dermal exposure to pesticides. Workers who apply and mix pesticides (applicators and mixers) are not at special risk. Both acute and chronic exposures can occur from spillage or by environmental contamination of clothing.

Determination of organochlorine pesticides and metabolites in drinking water, human blood serum, and adipose tissue.

Previously published analytical procedures by which drinking water, human blood serum, and adipose tissue may be analyzed for trace amounts of organochlorine pesticides have been modified to permit use of smaller samples. Data on percent recovery, detector sensitivity, and limit of detectability have been collected for each of the three reported procedures. The methodology has been applied to 59 blood samples, 20 drinking water samples, and 10 necropsy adipose tissue samples.