195 INTRODUCTION In an attempt to reduce the environmental consequences associated with incomplete fuel combustion, the US Clean Air Act Amendments of 1990, required that oxygenates are added to reformulated gasoline. Since 1979, methyl tert butyl ether (MTBE) has been used in the USA as an octane enhancing replacement for lead, primarily in mid and high grade gasoline. It is the most commonly ...

Abstract The peracetalization of a β-hydroxy hydroperoxide derived from methyl oleate was studied using benzaldehyde as model substrate to give the corresponding fatty 1,2,4-trioxane. desired product obtained mixture regioisomers but only one diastereoisomer each formed. nature acid catalyst and both p-toluene sulfonic (PTSA) Amberlyst A35 (A35) were found be efficient homogeneous heterogeneous...

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...

The objectives of this study were to investigate migration of volatile organic compounds (VOCs) from cross-linked polyethylene (PEX) pipes used for drinking water produced by different production methods, and to evaluate their potential risk for human health and/or influence on aesthetic drinking water quality. The migration tests were carried out in accordance with EN-1420-1, and VOCs were ana...

Concerns for atmospheric pollution from auto exhaust have led to the blending of "oxygenates" with motor fuels. The most common oxygenate, methyl tert-butyl ether (MTBE) is currently required within several metropolitan areas (Denver and Phoenix) in the range of 12% of the motor fuel. Amendments to the Clean Air Act may expand this requirement to as many as 44 other areas of the United States i...

Methylibium petroleiphilum PM1 is a methylotroph distinguished by its ability to completely metabolize the fuel oxygenate methyl tert-butyl ether (MTBE). Strain PM1 also degrades aromatic (benzene, toluene, and xylene) and straight-chain (C(5) to C(12)) hydrocarbons present in petroleum products. Whole-genome analysis of PM1 revealed an approximately 4-Mb circular chromosome and an approximatel...

The efficiencies of four different methods for the extraction of phospholipids (PLs) and lysophospholipids (LPLs) from human plasma samples were examined by comparing extraction recovery values using nanoflow liquid chromatography-electrospray ionization-mass spectrometry (nLC-ESI-MS). For recovery measurements, six PL and six LPL standards of different head groups were spiked into a human plas...