We determined the quantity and chemical composition of cuticular hydrocarbons of different strains, sex and age of buffalo flies, Haematobia exigua. The quantity of cuticular hydrocarbons increased from less than 1 μg/fly for newly-emerged flies to over 11 μg/fly in 13 d-old flies. The hydrocarbon chain length varied from C21 to C29, with unbranched alkanes and monounsaturated alkenes the major...

The main reactive air pollutants are SO2, H2S, sulphate compounds, NH3, NO, N02 and other oxidants and hydrocarbons. On the basis of a survey on the production and mean distribution of these compounds in pure and polluted atmospheres several chemical reactions are considered. The meteorological parameters, sun radiation, water vapour and the liquid water content of clouds modify these chemical ...

I. INTRODUCTION Throughout the world it may be economically possible to cultivate crops that can be harvested for the manufacturing of biofuels that could potentially have a significant impact result in reducing emissions of greenhouse gases. Use of renewable fuels such as bio-fuels can also reduce the US dependence on foreign energy sources. Plasma enhanced reforming is a promising approach fo...

Combustion of wood produces particulate matter (PM) emissions having the potential to induce respiratory tract diseases in humans. To date, however,few, if any, in vitro submerse exposure adverse effect studies characterized the actual particle characteristics within the culture medium. Indeed, the availability of particles and adsorbed toxic compounds in liquids may depend on particle characte...

petroleum hydrocarbons are important energy resources used by industry and in our daily life, whose production contributes highly to environmental pollution. to control such risk, bioremediation constitutes an environmentally friendly alternative technology that has been established and applied. it constitutes the primary mechanism for the elimination of hydrocarbons from contaminated sites by ...

Combustion of wood produces particulate matter (PM) emissions having the potential to induce respiratory tract diseases in humans. To date, however, few, if any, in vitro submerse exposure adverse effect studies characterized the actual particle characteristics within the culture medium. Indeed, the availability of particles and adsorbed toxic compounds in liquids may depend on particle charact...

Alkali metal K- and/or Na-promoted FeCoCuAl catalysts were synthesized by precipitation and impregnation, their physicochemical catalytic performance for CO2 hydrogenation to light hydrocarbons was also investigated in the present work. The results indicate that Na K introduction leads formation of active phase metallic Fe Fe-Co crystals order < K-Na. simultaneous causes a synergistic effect...

Catalyst coking is one of the key challenges in hydrocarbons processing. Herein, we studied potential reacting coke deposits with hydrogen to regenerate methanol–to–hydrocarbons (MTH) performance archetypical ZSM-5 catalysts exhibiting low-to-medium Si/Al atomic ratios (14–39). The reactivation substantially enhanced at elevated pressures (20–30 bar), restoring significant part MTH activity (>8...

Research in the sustainable conversion of biomass to fuels and chemicals is a necessity for reduction carbon footprint transport energy. Herein, we demonstrate an efficient tandem catalyst selectively convert (simulated) bio-oil hydrocarbons with enhanced C4+ fuel yield fixed bed reactor small pilot plant. The catalytic system multifunctional dual system; coupling catalysts (0.2 wt % X-TiO2(X: ...

Light alkanes and alkenes are abundant but are underutilized as energy carriers because of their high volatility and low energy density. A tandem catalytic approach for the coupling of alkanes and alkenes has been developed in order to upgrade these light hydrocarbons into heavier fuel molecules. This process involves alkane dehydrogenation by a pincer-ligated iridium complex and alkene dimeriz...