The paring mechanism of the aromatic cycle hydrocarbon pool is reinvestigated based on heptamethylbenzenium cation adsorbed within H-SSZ-13 using quantum chemical calculations.

We show that polycyclic aromatic hydrocarbon (PAH) based field effect transistor (FET) arrays can serve as excellent chemical sensors for the detection of volatile organic compounds (VOCs) under confounding humidity conditions. Using these sensors, w/o complementary pattern recognition methods, we study the ability of PAH-FET(s) to: (i) discriminate between aromatic and non-aromatic VOCs; (ii) ...

Four kinds of polyimides containing fluorine were successfully synthesized based on various dianhydrides including 4,4’-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 4,4’-oxydiphthlic dianhydride (ODPA) and 1,4-bis(3,4-dicarboxyphenoxy) benzene dianhydride (HQDPA), and various diamines including 2,2-bis[4-(4-aminophenoxy)phenyl]-hexafluoropropane (BDAF) and 2,2-bis[4-(4-aminophenoxy)ph...

During the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico a deep-sea hydrocarbon plume developed resulting in a rapid succession of bacteria. Colwellia eventually supplanted Oceanospirillales, which dominated the plume early in the spill. These successional changes may have resulted, in part, from the changing composition and abundance of hydrocarbons over time. Colwellia abundance pea...

A pathway of research is described, leading from the finding of an inhibitory effect of 3-methylcholanthrene on the carcinogenicity of an aminoazo dye, to the induction of drug-metabolizing enzymes by 3-methylcholanthrene, benzo[a]pyrene, and other polycyclic aromatic hydrocarbons, to the demonstration of enhanced drug metabolism in cigarette smokers, coffee drinkers, and people who eat charcoa...

The aryl hydrocarbon receptor (AhR) is a transcription factor belonging to the basic helix-loop-helix/PER-ARNT-SIM family. It is activated by a variety of ligands, such as environmental contaminants like polycyclic aromatic hydrocarbons or dioxins, but also by naturally occurring compounds and endogenous ligands. Binding of the ligand leads to dimerization of the AhR with aryl hydrocarbon recep...

Over the past two decades, laboratory smog chamber studies have been carried out to develop the information needed to construct SOA chemistry models for atmospherically relevant aromatic hydrocarbons. For each SOA precursor, the aromatic hydrocarbon is irradiated in the presence of NOX for a series of reactant concentrations. The amounts of SOA produced and hydrocarbon reacted at the end point ...

The photochemical C-H activation reactions of eta(3)-TpRh(CO)(2) (Tp = HB-Pz(3), Pz = 3,5-dimethylpyrazolyl) and CpRh(CO)(2) (Cp = C(5)H(5)) have been studied in a series of linear, cyclic, and aromatic hydrocarbon solvents on a femtosecond to microsecond time scale. These results have revealed that the structure of the hydrocarbon substrate affects the final C-H bond activation step, which is ...

Occupational exposure to hydrocarbon solvents has been found to be associated with an increased risk of exocrine pancreatic cancer (EPC), the human tumor with the highest prevalence of K-ras mutations. Ras genes are critical DNA targets for chemical carcinogens. We analysed the relationship between past occupational exposure to hydrocarbon solvents and mutations in codon 12 of the K-ras gene in...