New thermal diffusion coefficients of binary mixtures are measured for n-decane-n-alkanes and 1-methylnaphthalene-n-alkanes with 25 and 75 wt % at 25 degrees C and 1 atm using the thermogravitational column technique. The alkanes range from n-pentane to n-eicosane. The new results confirm the recently observed nonmonotonic behavior of thermal diffusion coefficients with molecular weight for bin...

The fatty acid pattern in three hydrocarbon-utilizing bacteria during growth on various substrates was examined. The predominant fatty acids in acetate-grown cells were C(16), C(16:1), C(18:1), and Br-C(19) and the major fatty acids in propane-grown cells were C(15), C(17), C(17:1), C(18:1), and Br-C(18). When one organism (Mycobacterium sp. strain OFS) was grown on the n-alkanes from C(13) to ...

Coking resistance: In this work, RuP2-MoP catalysts are shown to be highly stable and selective in the dehydrogenation of long-chain alkanes like n-heptane. Furthermore, active transition metal phosphide is compared its phosphorous-free RuMo-counterpart. addition improving olefin selectivity, incorporation phosphorous into RuMo-surface structure avoids catalyst deactivation.

Two yeast strains are enriched and isolated from industrial refinery wastewater. These strains were observed for their ability to utilize several classes of petroleum hydrocarbons substrates, such as n-alkanes and aromatic hydrocarbons as a sole carbon source. Phylogenetic analysis based on the D1/D2 variable domain and the ITS-region sequences indicated that strains HC1 and HC4 were members of...

The alkanes, a new class of neurolipids, are accumulated in the brain myelin when compared to the other brain subfractions [l--4]. The role of these hydrophobic substances in the myelin formation is far from clear. It appears that alkanes are required for a correct myelination, since the remaining myelin of the Quaking mutant, which bears a defect of myelin formation, presents only 30%total alk...

Selection experiments and protein engineering were used to identify an amino acid position in integral membrane alkane hydroxylases (AHs) that determines whether long-chain-length alkanes can be hydroxylated by these enzymes. First, substrate range mutants of the Pseudomonas putida GPo1 and Alcanivorax borkumensis AP1 medium-chain-length AHs were obtained by selection experiments with a special...