Chlorosulfonyl isocyanate (CSI) is reported to react with hydrocarbon alkenes by a stepwise dipolar pathway to give N-chlorosulfonyl-β-lactams that are readily reduced to β-lactams. Substitution of a vinyl hydrogen for a vinyl fluorine changes the dynamics for reaction with CSI so that a concerted pathway is favored. Rate constants were measured for reactions of CSI with monofluoroalkenes and s...

an aquifer located within a petroleum processing plant in moín, costa rica, suffers hydrocarbon pollution. this study aimed to determine the ability of indigenous microorganisms from this site to degrade polycyclic aromatic hydrocarbons (pahs) to evaluate the feasibility of an eventual bioremediation process. aerobic conditions were found in the aquifer, while microbial analyses of the groundwa...

in exploration seismology quality factor is widely used as a seismic attribute to identify anomalies related to attenuation, especially those caused by hydrocarbon. previous studies have indicated that seismic energy loss known as attenuation is greater for high frequency components of seismic data compared to the low frequency components. here the continuous wavelet transform is used to study ...

At present, petroleum hydrocarbon is one of the most serious Abstract: environmental problem. Oil spill occurring accidently in the ocean during transportation or other working places like refineries causes great threat to the flora and fauna existing nearby. Modern methods of remediation such as incineration, land filling, burning, etc. are expensive as well as their byproducts produced are of...

Males can produce complex sexual signals, often in different sensory modalities. The information conveyed by multiple signals, and the degree to which multiple signals interact in influencing female mating decisions, is not well understood. Male crickets produce 2 signals during courtship, an acoustic signal or courtship song, and a contact olfactory signal in the form of a blend of hydrocarbon...

The present study investigated the coupling effect of biodegradation and media filtration in treating hydrocarbon contaminated water. The study recorded reductions in total petroleum hydrocarbon, total dissolved solids, turbidity and microbial load. The study was essentially a simulated pump and treat process that involved the pumping of hydrocarbon contaminated water for treatment in a locally...

In this study, the hyphenation of gas chromatography with ICP tandem mass spectrometry (GC-ICP-MS/MS) for analysis volatile organochlorides in complex hydrocarbon samples is described.