This study examined the temporal component of pentachlorobenzene lethal body residues among three freshwater invertebrates. Also, using previous fluoranthene data allowed a more detailed examination of the role of biotransformation in lethal body residues and comparisons of lethal residues across chemical classes. Time-dependent toxicity of fluoranthene and pentachlorobenzene were compared amon...

The level and source of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated in the surface sediments from the Gorgan Bay, Caspian Sea. The sum of 16 PAHs (ΣPAH16) concentrations varied from 107.87 to 516.18 ng g(-1)dry weight, with average value of 270.96 ± 150.47 ng g(-1)dry weight. Ecological risk assessment of PAHs, indicated that adverse biological effects caused by acenaphthene, n...

Microbiological analyses of sediments chronically exposed to petrogenic hydrocarbons resulted in the isolation of a gram-positive, rod-shaped bacterium which mineralized naphthalene (59.5% of the original amount), phenanthrene (50.9%), fluoranthene (89.7%), pyrene (63.0%), 1-nitropyrene (12.3%), 3-methylcholanthrene (1.6%), and 6-nitrochrysene (2.0%) to carbon dioxide when grown for 2 weeks in ...

Petroleum exploitation in oilfields, especially drilling, generates an oily sludge mixed with hydrocarbons and mineral solids. This oily sludge is sometimes treated by bioremediation and phytoremediation. This investigation established that landfarmed oil sludge provided adequate soil conditions to grow jack beans (Canavalia ensiformis) that in turn rhizoand phytoremediated residual aliphatic a...

The Journal of Physical Chemistry A is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Photophysical, Electrochemical, and Electrogenerated Chemiluminescent Properties of 9,10-Dimethyl-7,12-diphenylbenzo[k]fluoranthene and 9,10-Dimethylsulfone-7,12-diphenylbenzo[k]fluoranthene† Eve F. Fabrizio, Andrew Payne, Neil E. Westlund, Allen J. Bard, a...

Abstract Roasting is a crucial and essential step to produce quality coffee. However, it could lead the formation of toxic suspected carcinogenic or procancerogenic compounds, such as polycyclic aromatic hydrocarbons. In this work, simple easily automatable green procedure based on solid-phase microextraction coupled with gas chromatography for analysis acenaphthene, anthracene, benzo[ghi]peryl...

A facile approach based on a bare gold nanoparticles (Au NPs) coupled film system as the surface-enhanced Raman scattering (SERS) substrate was developed for the effective detection of polycyclic aromatic hydrocarbons (PAHs). A smooth gold film (Au film) was self-assembled with a hydrophobic layer of an alkyl chain in order to capture the PAHs molecules from bulk solution to its surface. Next, ...

It has been suggested that the estrogenicity of PAHs could contribute to their carcinogenic effects via increased tissue-specific cell proliferation. Both benzo[a]pyrene (BaP) and benz[a]anthracene (BaA) are known to weakly activate estrogen receptor (ER)-dependent reporter constructs. In this study, several other PAHs, including fluorene, fluoranthene, pyrene, chrysene, phenanthrene and anthra...

Exposure of precision-cut rat liver slices to six structurally diverse polycyclic aromatic hydrocarbons, namely benzo[a]pyrene, benzo[b]fluoranthene, dibenzo[a,h]anthracene, dibenzo[a,l]pyrene, fluoranthene and 1-methylphenanthrene, led to induction of ethoxyresorufin O-deethylase, CYP1A apoprotein and CYP1A1 mRNA levels, but to a markedly different extent. In liver slices, constitutive CYP1A1 ...