methyl tert-butyl ether (mtbe), a gasoline octane enhancer, was introduced as a substitute for lead tetraethyl over 30 years ago. widespread use of mtbe in gasoline, has introduced mtbe into the environment compartments, mostly into the under ground and surface water and water as a second most frequently detected contaminant. in this study, we have isolated pure cultures from bacterial consorti...

High dependence on imported oil has increased U.S. strategic vulnerability and prompted more research in the area of renewable energy production. Ethanol production from renewable woody biomass, which could be a substitute for gasoline, has seen increased interest. This study analysed energy use and greenhouse gas emission impacts on the forest biomass supply chain activities within the State o...

This study examines the variation of spot and futures prices for energy commodities over the business cycle. The interest-adjusted basis and expected returns for crude oil, natural gas, heating oil, gasoline, and propane are estimated in relation to proxies for the state of the economy, inventory and other determinants predicted by the theory of storage over the period 1987-2011. We find that t...

homogenous charge compression ignition (hcci) combustion is spontaneous multi-site combustion of a nominally premixed air/fuel mixture that exhibits high rate of pressure rise and short combustion duration. to avoid excessive pressure rise rate and knocking, hcci engines are fueled with highly diluted mixture using a combination of excess air and/or egr. hcci combustion is attractive due to ext...

The gas flow estimation is crucial for the proper operation and monitoring of turbocharged (TC) engines with a torque structured engine control unit (ECU). This paper presents mean value models developed for modeling gas flow over the compressor, the turbine and the wastegate (WG) in a TC gasoline engine not equipped with a hot film air-mass flow meter (HFM). The turbine flow ...

Since 1970, vehicle’s exhaust pollutions have received increasing attention as a source of air pollution at both local (human health concerns) and global (global warming) scales. This study mainly discusses diesel and gasoline vehicles because, today, over 90% of vehicles on the road use gasoline and diesel fuels. The major concerns of gasoline exhaust contaminants are carbon monoxide (CO), hyd...

Convenience markets with gasoline pumps have flourished throughout the United States in the past 10 years. The growing demand for self-service gasoline and convenience grocery goods, readily accessible with fast service, have fueled a boom in the convenience market business. As transportation engineers and planners, we are asked to determine the impacts of developments on the transportation sys...

Online appendix figure I shows the dynamics of the effect of a change in the price of regular gasoline on the share of gasoline that is regular grade. The plot shows that a permanent increase in the regular price would increase the share of regular gasoline for at least six months. Online appendix figure II shows the distribution across households of the correlation between buying regular gasol...

All states rely on gasoline taxes as one source of funds for road improvement and maintenance. Historically, gasoline usage has been roughly proportional to road usage for most light vehicles, so the gas tax could be viewed as a user charge. Increasing fuel efficiency and alternative fuel vehicles reduce both the equity of the revenue source and its growth over time. At the same time, improved ...

Toluene is widely used as an industrial solvent and is usually produced in the processes of making gasoline. Inhaled toluene may cause genotoxicity and other adverse health effects. This study aimed to ascertain the relation between blood toluene exposure and genotoxicity, as measured by sister chromatid exchange (SCE), by comparing gasoline station workers to controls. Mean blood toluene and S...