The methylating capability of methamidophos, assayed by the formation of [7-14C]methylguanine in mouse liver, was investigated using a 14C-insecticide labelled at the O--CH3 group. Following i.p. administration of the toxicant, [7-14C]methylguanine could be isolated from liver nucleic acids of treated mice. The amount of 14C-label reached its maximum 6 h following administration of the insectic...

Adult vial technique (AVt) and spray table bioassays were conducted to evaluate toxicity of selected insecticides against immature and adult thrips, Frankliniella spp. (thysanoptera: thripidae). In AVt, technical insecticides comprised of organophosphates (dicrotophos and methamidophos), spinosyn (spinosad) and neonicotinoids (thiamethoxam and imidacloprid) were used. the LC50 values for contac...

Post-application pesticide emissions from wetted leaf surfaces and soil may present a significant pathway of exposure to humans in nearby residential communities. In this study, high volume air sampling was performed to measure airborne concentrations of the pesticide methamidophos in a residential community in close proximity to aerial spraying. Sampling occurred before, during and 24 h post-a...

piroxicam is a non-steroidal anti-inflammatory agent which has an extensive use in rheumatic disorders. since its skin penetration is still a subject for research, the aim of this study was to evaluate the effect of dimethyl sulfoxide on percutaneous penetration of piroxicam gel formulation through skin. in this study, as a model, two types of 0.5% piroxicam new gels, so called red and green ge...

In the present study, the cumulative exposure of 25 acetylcholinesterase (AChE) inhibiting pesticides through the consumption of nine fruits and vegetables by the Brazilian population was assessed. Food consumption data were obtained from a household budget survey conducted in all Brazilian states from July 2002 to June 2003. Residue data from 4001 samples were obtained from the Brazilian natio...