For every residence, the concentration of T- fipronil in indoor dust exceeded that in outdoor dust, and the median concentration of T- fipronil was 15 times higher indoors than outdoors.Ĭomparison of fipronil sources in North Carolina surface water and identification of a novel fipronil transformation product in recycled wastewater In outdoor dust, all concentrations of T- fipronil were less than 70?g/kg with one exception (430?g/kg). All three of the residences with a dog on which a flea-control product containing fipronil was used were among the five residences with elevated fipronil concentrations. Nineteen of 24 samples of indoor dust had T- fipronil concentrations less than 270 ?g/kg the remaining five had concentrations from 1320 to 14,200 ?g/kg. Fipronil accounted for most of the total fipronil (T- fipronil fipronil+desulfinyl fipronil+fipronil sulfide), followed by desulfinyl fipronil and fipronil sulfide. At least one of these three fipronil compounds was detected in every sample. We measured fipronil, fipronil sulfide, and desulfinyl fipronil concentrations in indoor and outdoor dust from 24 residences in Austin, Texas. Burkhardt, M.R.įipronil is a potent insecticide used for control of termites, fleas, roaches, ants, and other pests. (author) [ptįipronil and its degradates in indoor and outdoor dust The model is based on the point-kinetics approximation, with 2 delayed neutron percursors and up to 11 decay power generating groups. The program presents capabilities for on-line exchange of the operating parameters during the transient simulation, by friendly keyboard instructions. PC-REATOR, a reactor core transient simulation code has been developed for the real-time operator training on a IBM- PC microcomputer. International Nuclear Information System (INIS) PC-Reactor-core transient simulation code
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