نتایج جستجو برای: mtbe methyl tertiary
تعداد نتایج: 192237 فیلتر نتایج به سال:
Background and purpose: Annually high volumes of Methyl Tertiary Butyl Ether (MTBE) are used as organic solvents in various chemical and fuels as a substitute for lead. These compounds enter the environment after being used and pollute the environmental sources such as surface water and groundwater. Exposures to this organic matter could have acute and chronic influences on human, including ner...
Abstract Background and Objectives: Methyl-tertiary butyl ether (MTBE) is one of the fuel oxygenated additive that is used to reduce the environmental pollution resulting from engine combustion. This study was carried out to evaluate the acute (1 day) and subchronic (30 days) effects of MTBE on some fertility indices in the male rats. Methods: In this study, under two separate experiments (acut...
Methyl tertiary butyl ether (MTBE), a gasoline additive used to increase octane and reduce carbon monoxide emissions and ozone precursors, has contaminated drinking water and can lead to exposure by oral, inhalation, and dermal routes. To determine its dermal, oral, and inhalation kinetics, 14 volunteers were exposed to 51.3 microg/ml MTBE dermally in tap water for 1 h, drank 2.8 mg MTBE in 250...
Methyl tert-butyl ether ~MTBE! contamination in groundwater often coexists with benzene, toluene, ethylbenzene, and xylene ~BTEX! near the source of the plume. Tertiary butyl alcohol ~TBA! is a prevalent intermediate of MTBE degradation. Therefore, there is a significant potential for interference of MTBE and TBA degradation by the presence of BTEX whether treatment is in situ or ex situ. In th...
Methyl tertiary-butyl ether (MTBE) is a gasoline oxygenate that is widely used throughout the US and Europe as an octane-booster and as a means of reducing automotive carbon monoxide (CO) emissions. The combustion by-products of pure MTBE have been evaluated in previous laboratory studies, but little attention has been paid to the combustion by-products of MTBE as a component of gasoline. MTBE ...
The paper considers the possibility of repurposing a plant for production methyl tert-butyl ether (MTBE) esterification light fraction gasoline by catalytic cracking. conversion MTBE installation to process cracking will allow obtaining an additional amount high-octane component automotive
Methyl tertiary butyl ether (MTBE) rapidly dissolves cholesterol gall stones in vitro and in vivo. To further characterise tolerability and safety of this aliphatic ether, either MTBE (1 ml/kg body wt daily for two days) or an equal amount of saline was infused into the common bile duct (CBD) of eight cholecystectomised rabbits. Transient vomiting, dyspnoea and somnolence developed during MTBE ...
Methyl tertiary butyl ether (MTBE) (CAS No. 1634-04-4) is a volatile organic compound used almost exclusively as an oxygenate in unleaded gasoline to improve combustion efficiency. In the past it also had limited use as a therapeutic drug for dissolving cholesterol gallbladder stones. Currently, MTBE is added at 11% by volume to almost all of the gasoline used in California, although on March 2...
Methyl tertiary-butyl ether (MTBE) is used to reduce carbon monoxide and ozone in urban air and to boost fuel octane. There is a lack of knowledge in the literature about the histomorphometric changes of the testis following exposure to MTBE. Therefore, this experimental study was performed to determine the effect of oral exposure to MTBE on histologic and histomorphometric changes of testis in...
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