This article reports the effect of coexposure to Indian chrysotile asbestos (5 mg/rat) and kerosene soot (5 mg/rat) on the pulmonary phase I and phase II drug-metabolizing enzymes 1, 4, 8, 16, 30, 90, and 150 days after a single intratracheal inoculation. Exposure to soot resulted in a significant induction of the pulmonary microsomal cytochrome P450 and the activity of dependent monooxygenase,...

The formation of polycyclic aromatic hydrocarbons (PAH) and soot has become one of the central themes of research activities in the area of combustion and pyrolysis of hydrocarbon fuels. The interest in the subject stems mostly from environmental concerns on pollutant emission from combustion devices. The research activities span experimental, theoretical, and computational efforts and cover a ...

Structured catalysts for the simultaneous removal of soot and nitrogen oxides were prepared by means of coating cordierite monoliths with alumina-based suspensions containing Cu, Co or Fe and Cs as the catalytically active phase. Textural and chemical properties of the coated monoliths were determined by means of N2-physisorption, SEM and temperature programmed reduction. Their activity in the ...

The micro-structure of laminar premixed, atmospheric-pressure, fuel-rich flames of n-heptane/oxygen/argon has been studied at two equivalence ratios (C/O 0.63 and C/O 0.67). A heated quartz microprobe coupled to an online gas chromatography/mass spectrometry (HP 5890 Series II/HP 5972) has been used to establish the identities and absolute concentrations of stable major, minor, and trace specie...

A new phenomenological model, the TP (Temperature Phase) model, is presented to carry out optimization calculations for turbulent diffusion combustion in a high-pressure common rail diesel engine. Temperature is the most important parameter in the TP model, which includes two parts: an auto-ignition and a soot model. In the auto-ignition phase, different reaction mechanisms are built for differ...

Miniaturized detection systems for nanometer-sized airborne particles are in demand, as in applications for onboard diagnostics downstream particulate filters in modern diesel engines. A soot sensor based on resistivity measurements was developed and characterized. This involved generation of soot particles with properties similar to diesel engines using a quenched co-flow diffusion flame; depo...

This laboratory study uses a novel furnace to resolve nitrogen evolution during the three stages of pulverized coal combustion. primary devolatilization, secondary pyrolysis, and com­ bustion The behavior of six coals depicts continuous rank variations, as well as suppressed nitrogen evolution {i'om low volatility coals. During primary de volatilization of any coal, ar­ omatic compounds in tar ...

0010-2180/$ see front matter 2009 The Combust doi:10.1016/j.combustflame.2009.11.009 * Corresponding author. Present address: CFD Rese AL 35805, United States. Fax: +1 256 726 4806. E-mail addresses: [email protected] (R.S. Mehta), dch [email protected] (M.F. Modest). 1 Present address: Department of Mechanical Engine Merced, CA 95348, United States. A comprehensive model for luminous turbulent ...

The structure of soot was investigated within the fuel-lean (overfire) region of overventilated buoyant turbulent diffusion flames burning in still air. The study was limited to the long residence time regime where characteristic flame residence times are roughly more than an order of magnitude longer than the laminar smoke point residence time and soot generation factors (the mass of soot emit...

Title of Document: Measurements of Soot Temperature in a Diffusion Flame Using a Digital Camera Jose Castillo Moreno, Master of Science, 2012 Directed by: Peter B. Sunderland, Associate Professor, Department of Fire Protection Engineering Temperatures were measured in a laminar axisymmetric diffusion flame with a digital camera. The camera was a Nikon D700, modified to remove the Infra-Red (IR)...