background: the incomplete burning of fuel in engine of vehicles, evaporation of petrol from gas stations, and also car carburetor cause unburned hydrocarbons to be emitted in ambient air of cities and gas station locations. from unburned hydrocarbons; monocyclic aromatic hydrocarbon influence to citizen's health and benzene is known as carcinogenic compounds. the objectives of this study are t...

The photodynamic effect of polycyclic hydrocarbons was studied in Neurospora crassa and tissue culture cells of the Chinese hamster. The polycyclic hydrocarbons were dissolved in dimethylformamide and added to the treatment solution or medium. Other solvents, such as dimethyl sulfoxide and bovine serum, quenched the photodynamic effect of 3,4-benzpyrene and could not be used. Conidia from a dik...

Aromatic hydrocarbons contaminate many environments worldwide, and their removal often relies on microbial bioremediation. Whereas aerobic biodegradation has been well studied for decades, anaerobic hydrocarbon biodegradation is a nascent field undergoing rapid shifts in concept and scope. This review presents known metabolic pathways used by microbes to degrade aromatic hydrocarbons using vari...

H ighly trained search-and-rescue (SAR) dogs are indispensable members of urban SAR teams responding to a variety of natural and man-made disasters. A large-scale disaster could result in the release and mixing of dozens or even hundreds of chemical agents. Therefore, urban disaster sites should be considered potentially contaminated with many dangerous chemicals and substances. In a previous r...

A Monte Carlo simulation study of water and hydrocarbons aiming at understanding the degradation of polyethylene cable insulation is presented. Atomistic simulations of water, hydrocarbons and ions are presented. The SPC/E and TraPPE potential functions are used. The equilibrium distributions and clustering of water in vapour and in hydrocarbons was investigated using Gibbs-ensemble Monte-Carlo...

The concept of disjoint NBMOs in diradical alternant hydrocarbons (AHs) is reviewed and extended to diradical nonalternant hydrocarbons (nonAHs). A valence-bond (VB) method for recognizing disjoint versus nondisjoint NBMOs (nonbonding molecular orbitals) in diradicals is presented. When circumscribed with hexagonal rings, disjoint diradicals produce nonradical polycyclic successors and nondisjo...

D ufour G land, Harpagoxenus, Heptadecane, (£)-ß-Farnesene, Homofarnesene The volatile components of tlic Dufour gland sccrcticn of wcrlvcrs cf t*!C eint arpoxeni+s sublaevis have been analysed by gas chromatography and mass spectrometry. Over 20 compo­ nents have been identified, consisting of linear and terpenoid hydrocarbons. Each gland contains approximately 6 ng of hydrocarbons with n-hept...

today oil removal from contaminated soil by new methods such as bioremediation is necessary.  in this paper, the effect of chemical fertilizers and aeration on bioremediation of oil-contaminated soil has been investigated. also the control group, (bioremediation of petroleum hydrocarbons in contaminated soil without treatment by chemical fertilizers and aeration treatment was examined. the cond...

Crude oil is a complex mixture of hydrocarbons with different structures; its components vary in bioavailability and toxicity. It is important to understand how bacterial communities response to different hydrocarbons and their co-acclimation in the process of degradation. In this study, microcosms with the addition of structurally different hydrocarbons were setup to investigate the succession...