Strains of hydrocarbon-degrading microorganisms (bacteria and fungi) were isolated from an agricultural soil in France. In a field, a portion was treated with oily cuttings resulting from the drilling of an onshore well. The cuttings which were spread at the rate of 600 g HC m-2 contained 10% of fuel oil hydrocarbons (HC). Another part of the field was left untreated. Three months after HC spre...

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 ...

Ideally, the flue gas resulting from high-temperature oxidation of hydrocarbons (HC) contains CO 2 , H 2 O, N 2 , O 2 and some acceptable levels of oxides of nitrogen (NOx) and oxides of sulfur (SOx). In reality, the flue gas from a combustion process contains CO 2 , H 2 O, N 2 , O 2 and some concentration of carbon monoxide (CO), unburned hydrocarbons (UHC), NOx and SOx .

Marine controlled-source electromagnetic (MCSEM) technology has been successfully established as an effective tool for offshore hydrocarbon (HC) exploration. In this paper we consider another application of the MCSEM method for HC reservoir monitoring. We demonstrate that EM methods can also be used for the monitoring of producing wells in connection with the enhanced recovery of hydrocarbons. ...

Introduction Combustion in excess oxygen, as in dieseland lean-burn engines, significantly improves the fuel economy, i.e. reducing the CO2 emissions. However, the lean environment in the exhaust gas obstructs the NOx reduction ability of the three-way catalyst, thus emphasizing the need for alternative techniques, where one promising is selective catalytic reduction with hydrocarbons (HC-SCR)....

In recent years, China has promoted a series of legal norms to reduce the environmental impact air pollutants from vehicles. The three main vehicle emission species (carbon monoxide, hydrocarbons, nitrogen oxides) contribute significantly pollution. this study, factor method was used estimate vehicles in 31 provinces 2006 2016. results show trend total carbon monoxide (CO) and hydrocarbons (HC)...

SYNOPSIS. The outer surface of insects is covered with a lipid layer that provides water-proofing and protection against environmental stresses. Hydrocarbons (HC) are major constituents of this epicuticular wax and they also serve as semiochemicals. In some insects HC are also exploited as biosynthetic precursors for pheromones. HC are synthesized by oenocytes which are situated in the integume...