MTBE


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MTBE

Abbreviation for methyl-tert-butyl ether.

MTBE

Methyl-tert-butyl-ether.

Environment
A volatile, flammable, and colourless octane-boosting aliphatic ether which is added to reformulated gasoline to help it burn cleaner. While it is not listed by the IARC/WHO as a carcinogen, it imparts an unpleasant taste to water at very low concentrations (5–15µg/l) and persists in groundwater. It is biodegraded by bacteria and can be removed by a fluidised bed bioreactor or activated carbon.

Surgery
MTBE rapidly dissolves cholesterol stones in vivo, introduced under local anaesthesia via a percutaneous transhepatic cholecystectomy catheter as a non-invasive method for treating gallstones. After injection, the dissolved cholesterol is drained from the bladder. MTBE stone dissolution is effective if the patients are selected for cholesterol stones; it is improved and accelerated by adding transcutaneous ultrasound.
 
Complications
Nausea, vomiting, bile leakage, drowsiness, transient increase of liver enzymes, anorexia, hypotension.

MTBE

Methyl-tert-butyl-ether Surgery An aliphatic ether that rapidly dissolves cholesterol stones in vivo, introduced under local anesthesia via a percutaneous transhepatic cholecystectomy catheter, as a non-invasive method for treating gallstones; after injection, the dissolved 'slurry' is drained from the bladder Complications N&V, bile leakage, drowsiness, transient ↑ of liver enzymes, anorexia, hypotension; MTBE stone dissolution is effective if the Pts are selected for cholesterol stones, improved and accelerated by adding transcutaneous ultrasound. See Lithotripsy EnvironmentAn octane-boosting additive used in reformulated gasoline that helps the gas burn cleaner.
References in periodicals archive ?
MTBE was also recognized as a carcinogen and became known for giving water a turpentine odor and chemical taste, rendering water unfit for human consumption at even the lowest concentrations.
Obviously, if there are few exceedances of the state's ambient groundwater quality standard for MTBE in private wells and the cancer incidence and prevalence is high, the standard is too high.
The DEP has not officially linked the 1986 spill to the small amount at Bay Path, but Board of Health records say at least five homes between the school and spill site have MTBE readings above the safe drinking water standard.
Conventional gasoline may also contain MTBE to meet octane needs.
y introduced, followed by algorithm performance results on the MTBE and methyl acetate columns.
Considered a serious environmental problem, the cost of removing MTBE from drinking water sources has been estimated by American Water Works Association to be as high as $85 billion.
MTBE is one of a group of chemicals commonly known as "oxygenates" because they raise the oxygen content of gasoline, and therefore increase its octane number and reduce automotive emissions, such as carbon monoxide and hydrocarbons.
El fraccionamiento cromatografico del extracto no polar (MTBE:MeOH 9:1) de las partes aereas de Zanthoxylum acuminatum revela la presencia del lignano dibencilbutirolactonico conocido como hinokinina [16,17] 1 y los cuatro bisfurano lignanos (+)-asarinina [18] 2, (+)-piperitol [19] 3, (+)-kobusina [19] 4, y epi-kobusina [20] 5.
"Contrary to many press reports, MTBE has not been identified as a human carcinogen by the U.S.
However, gasoline oxygenates such as methyl tertiary-butyl ether (MTBE) and ethanol generate other air emissions and have adverse impacts on water and land.