Alkanes are major constituents of crude oil and are released to the marine environment by natural seepage and from anthropogenic sources. Due to their chemical inertness, their removal from anoxic marine sediments is primarily controlled by the activity of anaerobic alkane-degrading microorganisms. To facilitate comprehensive cultivation-independent surveys of the diversity and distribution 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...

Through this study, the ability of a modified Peng-Robinson (MPR) equation of state in predicting the surface tension of n-alkanes based on the density functional theory approach was investigated and compared with other studies. The interfacial layer thickness and the density profile were calculated simultaneously at different temperatures from triple point to near critical point using the modi...

Many efforts have been made to model adsorption and diffusion processes in metalorganic frameworks (MOFs) in the past several years. In most of these studies, the framework has been kept rigid. In this study, we examine the effect of using a flexible framework model on the self-diffusion coefficients and activation energies calculated for several short n-alkanes and benzene in IRMOF-1 from mole...

We have measured the short-time and long-time elastic responses to compression of various types of surfactant layers adsorbed at oil-water interfaces. We prepared reasonably monodisperse oil-in-water emulsions with the same surfactants and monitored the time evolution of the emulsion droplets' diameter. We used a broad variety of surfactants (cationic, nonionic, and small polymers) and alkanes ...

Microbial treatment of swine fecal waste to generate long-chain linear alkanes after fast pyrolysis" (2010).

Future enrichment of atmospheric CO2 and its effect on ecosystems were studied using grassland free air CO2 enrichment (FACE) experiments. Plant waxes have been shown to be directly modified under elevated CO2 concentration. Lipids, as major components of plant waxes, are important constituents of plant surfaces and their position at the plant/ atmosphere interface makes them susceptible to env...

Abstract This study aims to characterize binary mixtures consisting of a liquid with dissolved gas by determining their dynamic viscosity and interfacial tension using equilibrium molecular dynamics (EMD) simulations in the temperature range between (298 573) K for solute mole fractions up 0.20. With help systematic variation solvent molecules, influence characteristics, e.g., form size, shape,...