The release of methyl tert-butyl ether (MTBE) to the environment, mainly from damaged gasoline underground storage tanks or distribution systems spills, has provoked extended groundwater pollution. Biological treatments are, in general, a good alternative for bioremediation of polluted sites; however, MTBE elimination from environment has constituted a challenge because of its chemical structur...

BACKGROUND Remediation of tert-butyl alcohol (TBA) in subsurface waters should be taken into consideration at reformulated gasoline contaminated sites since it is a biodegradation intermediate of methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), and tert-butyl formate (TBF). The effect of temperature on TBA biodegradation has not been not been published in the literature. METHODS...

A new library of ionophoric p-tert-butylcalix[4]diquinones containing ester (1), primary, secondary, and tertiary amide (2-4), and crown ether (5) substituents has been synthesized by treatment of the respective 1,3-bis-substituted p-tert-butylcalix[4]arene with Tl(OCOCF(3))(3) in trifluoroacetic acid. The structures of the free ligands 1 and 2, a p-tert-butylcalix[4]diquinone bridged at the lo...

The title compound, C(16)H(22)O(3), is bent with a dihedral angle of 75.3 (1)° between the mean planes of the benzene ring and a group encompassing the ester functionality (O=C-O-C). In the crystal, the mol-ecules are linked into infinite chains held together by weak C-H⋯O hydrogen-bonded inter-actions between an H atom on the benzene ring of one mol-ecule and an O atom on the ketone functional...

The crystal structure of the title compound, C(11)H(16)N(2)O(2), contains two crystallographically independent mol-ecules forming dimers by pairs of inter-molecular N-H⋯N hydrogen bonds. The two mol-ecules are related by a pseudo-twofold axis. The dihedral angle between the pyridine ring and the carbamate plane differs in the two mol-ecules [12.1 (3) and 3.5 (3)°].

The title compound, C(15)H(19)NO(5), is bent with a dihedral angle of 61.8 (2)° between the mean planes of the benzene ring and a group encompassing the ester functionality (O=C-O-C). The dihedral angle of 0.8 (2)° between the mean planes of the nitro group and the benzene ring indicates near coplanarity. In the crystal, each mol-ecule is linked to four adjacent mol-ecules by weak C-H⋯O hydroge...

Telomerase is best known for its canonical function in telomere maintenance. However, a growing number of non-telomeric functions have been described. Several groups have found the telomerase protein TERT to persist in adult brain neurons. A protective role for the telomerase protein TERT had been demonstrated in cultivated mouse neurons during brain development, against excitotoxic stresses fr...

The paper deals with the problem of developing a multi-output soft sensor for industrial reactive distillation process methyl tert-butyl ether production. Unlike existing approaches, this proposes using filters to predict model errors, which are then taken into account as corrections in final predictions outputs. decomposition optimal estimation time delays is proposed each input sensor. Using ...

A reduced primary reference fuel (PRF)-alcohol-di-tert-butyl peroxide (DTBP) mechanism with 108 species and 435 reactions, including sub-mechanisms of PRF, methanol, ethanol, DTBP, and the four butanol isomers, is proposed for homogeneous charge compression ignition (HCCI) engine combustion simulations of butanol isomers/nheptane mixtures. HCCI experiments fueled with butanol isomer/n-heptane m...

AIM Methyl-tertiary-butyl ether (MTBE), a well-known gasoline oxygenate compound, is still used in several countries. Several studies investigated the effects of MTBE on the activity of phase II metabolism enzymes. There is no published data on the effect(s) of short-term exposure to MTBE on mRNA levels of antioxidant genes. Therefore, the present study was carried out. METHODS A total of 15 ...