11,266 research outputs found
Effects of cadmium and zinc on the growth, food consumption, and nutritional conditions of the white shrimp, Litopenaeus vannamei (Boone).
No full textMetallothionein induction and heavy metal accumulation in white shrimp Litopenaeus vannamei exposed to cadmium and zinc.
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Draft toxicological profile for JP-5, JP-8, and jet A fuels
Full text linkA Toxicological Profile for JP-5 and JP-8 was released in 1998. This present edition supersedes any previously released draft or final profile.Chemical manager(s)/author(s): John Risher, Obaid Faroon, ATSDR, Division of Toxicology and Human Health Sciences, Atlanta, GA; Fernando Llados, Lisa Ingerman, Mario Citra, SRC, Inc., North Syracuse, NY
JP-10 combustion studied with shock tube experiments and modeled with automatic reaction mechanism generation
No full textThis work presents shock tube experiments and kinetic modeling efforts on the pyrolysis and combustion of JP-10. The experiments were performed at 6–8 atm using 2000 ppm of JP-10 over a temperature range of 1000–1600 K for pyrolysis and oxidation equivalence ratios from 0.14 to 1.0. This work distinguishes itself from previous studies as GC/MS was used to identify and quantify the products within the shocked samples, enabling the tracking of product yield dependence on equivalence ratio as well as identifying several new intermediates that form during JP-10’s decomposition. A detailed, comprehensive model of JP-10’s combustion and pyrolysis kinetics was constructed with the help of RMG, an open-source reaction mechanism generation software package. The resulting model, which includes 691 species reacting in 15,518 reactions, was extensively validated against the shock tube experimental dataset as well as newly published flow tube pyrolysis data from Ghent. Most of the important rate coefficients were computed using quantum chemistry. The model succeeds in identifying all major pyrolysis and combustion products and captures key trends in the product distribution. Simulated ignition delays agree within a factor of 4 with most experimental ignition delay data gathered from literature. The presented experimental work and modeling efforts yield new insights on JP-10’s complex decomposition and oxidation chemistry and identify key pathways towards aromatics formation.Naval Air Warfare Center (U.S.) (Contract N68335-09-C-0367)Naval Air Warfare Center (U.S.) (Contract N68335-10-C-0534)United States. Department of Energy. Office of Basic Energy Sciences (Grant DE-FG02-98ER14914)National Science Foundation (U.S.) (Grant 0535604)National Science Foundation (U.S.) (Grant 0312359)United States. Department of Energy. Office of Basic Energy Sciences (DE-SC0001198)Richard Burne
Medical utilization and cost of women with stress urinary incontinence in outpatient clinics
No full textReproduction obstacles for the female green neon shrimp (Neocaridina denticulata) afterexposure to chlordane and lindane.
No full textShock tube study of JP-10 ignition delay time
No full textJP-10 (exo-tetrahydrodicyclopentadiene, C10H16) ignition delay times were measured in a preheated shock tube. The vapor pressures of the JP-10 were measured directly by using a high-precision vacuum gauge, to remedy the difficulty in determining the gaseous concentrations of heavy hydrocarbon fuel arising from the adsorption on the wall in shock tube experiments. The whole variation of pressure and emission of the OH or CH radicals were observed in the ignition process by a pressure transducer and a photomultiplier with a monochromator. The emission of the OH or CH radicals was used to identify the time to ignition. Experiments were performed over the pressure range of 151-556 kPa, temperature range of 1000-2100 K, fuel concentrations of 0.1%-0.55% mole fraction, and stoichiometric ratios of 0.25, 0.5, 1.0 and 2.0. The experimental results show that for the lower and higher temperature ranges, there are different dependency relationships of the ignition time on the temperature and the concentrations of JP-10 and oxygen
The neural networks involved in pitch labeling of absolute pitch musicians
No full textWu C, Kirk IJ, Hamm JP, Lim VK. The neural networks involved in pitch labeling of absolute pitch musicians. NeuroReport. 2008;19(8):851-854
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