Aldehyde deformylating oxygenase (ADO) is a unique enzyme found exclusively in photosynthetic cyanobacteria, which natively converts acyl aldehyde precursors into hydrocarbon products embedded in cellular lipid bilayers. This capacity has opened doors for potential biotechnological applications aiming at biological production of diesel-range alkanes and alkenes, which are compatible with the no...

Marine sediments are found to record various information for example the evolution of ocean and exchange matter energy between surrounding continents oceans. The Southwest Sub-basin is one most important tectonic unit in South China Sea Basin. geochemical provides potential understand sedimentary history Sea. In this paper, aliphatic hydrocarbon compounds two core from sub-basin were analyzed u...

Atmospheric aerosol particles were collected with a high-volume sampler in a Finnish coniferous forest during the field campaign Quantification of Aerosol Nucleation in the European Boundary Layer (QUEST) in March–April 2003. Four chromatographic techniques were applied to characterise the organic composition of the samples, and to study variations in the concentrations of identified compounds....

n-Alkanes, polycyclic aromatic hydrocarbons (PAHs), n-alkanals, n-alkan-2-ones, long-chain alkenones, oxy-PAHs, n-alkanols, sterols and free alkanoic acids have been reliably determined in various environmental matrices by using one-step flash chromatography compound class fractionation and subsequent gas chromatography (GC)–MS and/or GC–flame ionization detection analysis. The obtained recover...

The rates of uptake and release of guest molecules in nanoporous solids are often strongly influenced or even controlled by transport resistances at the external surface ("surface barriers") rather than by intraparticle diffusion, which was assumed to be rate controlling in many of the earlier kinetic studies. By correlating the surface resistance with the intracrystalline diffusivity, we devel...

Alkanes are major constituents of crude oil. They are also present at low concentrations in diverse non-contaminated because many living organisms produce them as chemo-attractants or as protecting agents against water loss. Alkane degradation is a widespread phenomenon in nature. The numerous microorganisms, both prokaryotic and eukaryotic, capable of utilizing alkanes as a carbon and energy s...

Project description: C2-C5 alkanes, alkenes and alkynes are useful tracers of natural and anthropogenic emissions. With diverse emission sources and moderately short atmospheric lifetimes, non-methane hydrocarbons (NMHCs) exhibit significant latitudinal, seasonal and vertical gradients [1]. They primarily react with the hydroxyl (OH) radical in the atmosphere, although also with ozone, nitrate,...

In this work, the thermodynamic scaling framework has been used to emphasize limitations of fully flexible coarse grained molecular models yield shear viscosity real liquids. particular, extensive dynamics simulations have confirmed that, while being reasonable describe short normal alkanes, Lennard-Jones and Mie chains force fields are inadequate capture density dependence medium long alkanes....

An experimental investigation of the characteristics and transformation mechanism Jimsar oil shale derived was conducted using a solid-state nuclear magnetic resonance spectrometer (13C NMR), Fourier transform infrared spectroscopy (FT-IR), liquid 1H NMR, gas chromatography-mass spectrometry (GC-MS) techniques. The carbon skeleton structure is mainly composed aliphatic carbons (70.5%), mostly c...