Aerobic cometabolism recognizes that microorganisms can transform non-growth supporting substrates. The term "cometabolism" was first introduced over 30 years ago and has been redefined, criticized, and used widely ever since. In this review we have examined the cometabolism of chlorinated solvents. These transformations are initiated by monooxygenases or dioxygenases with relaxed substrate ran...

This review is focused on the removal of chlorinated hydrocarbons (as representative persistent pollutants) from soil by soil-washing techniques, paying special attention to application electrochemically assisted technologies for treatment liquids and gases produced during this treatment. It considers degree maturity suggests challenges future research. Electrochemical can help improve overall ...

Monoaromatic hydrocarbons (MAHs) monitoring is of environmental interest since these chemical pollutants are omnipresent. While waiting for robust sensors able to detect hydrocarbons at very low levels, the present study shows how each compound from pure BTEX mixtures can be identified fast and quantified thanks to Raman spectrometry and data processing based on the SIMPLISMA algorithm. A prepr...

The activities of liver drug-metabolising enzymes for 16 aromatic or chlorinated hydrocarbons were measured in male rats after a three-week daily intake of ethanol amounting to 30% of total energy intake. Although the ethanol feeding produced only a slight increase in the microsomal cytochrome P-450 content, it increased the in-vitro metabolism of most hydrocarbons three-to six-fold. That a maj...

Trihalomethanes, carbon tetrachloride, 1,1,1-trichloroethane, 1,2-dibromoethane, chlorinated benzenes, ethylbenzene, and naphthalene at concentrations commonly found in surface and groundwater were incubated under anoxic conditions to study their transformability in the presence of denitrifying bacteria. None of the aromatic compounds showed significant utilization relative to sterile controls ...

Polycyclic aromatic hydrocarbons (PAHs) are essential components in numerous natural and man made organic compounds. In asphaltenes, knowledge of the electronic structure of both its aromatic and aliphatic components is of crucial importance, when trying to understand and predict its macroscopic properties. *Correspondence: Uwe Bergmann, Physical Biosciences Division, Lawrence Berkeley National...

The metabolic activation of several chemical classes of procarcinogens is being studied in cultured human bronchi. Previous studies have shown that carcinogenic polynuclear aromatic hydrocarbons are metabolically activated by the bronchial epithelium. In the study reported here, dimethylnitrosamine and 1,2-dimethylhydrazine were also found to bind to both cellular DNA and protein. Bronchial DNA...

The principles of the electron impact methods Electron Energy Loss (EEL) spectroscopy, Electron Transmission (ET) spectroscopy, measurement of EnergyDependence (ED) of vibrational excitation, and Dissociative Attachment (DA) spectroscopy are briefly introduced. The possibilities of modem instrumentation are illustrated with the examples of molecular oxygen and 1,3-butadiene. The following subje...

An alkane-degrading bacterium, designated GTI MVAB Hex1(T), was isolated from chronically crude oil-contaminated soil from an oilfield in southern Illinois. The isolate grew very weakly or not at all in minimal or rich media without hydrocarbons. Straight-chain aliphatic hydrocarbons, such as hexadecane and heptadecane, greatly stimulated growth; shorter-chain (</=C(15)) hydrocarbons did not (w...