The conformational order of sodium dodecyl sulfate (SDS), sodium dodecylsulfonate (DDS), dodecyltrimethylammonium chloride (DTAC), and dodecylammonium chloride (DAC) adsorbed at the D2O/CCl4 interface has been examined by total internal reflection sum-frequency vibrational spectroscopy (VSFS). The vibrational sum-frequency spectra indicate the presence of gauche conformations in the hydrocarbon...

Resveratrol, a compound present in a variety of plants, was recently shown to have potent chemopreventive activity against aryl hydrocarbon-induced tumorigenesis in mice. Therefore, in the present study, we examined the effect of resveratrol on the function of the aryl hydrocarbon receptor (AHR) and the transcription of CYP1A1 in human HepG2 hepatoma cells. Resveratrol inhibited the increase in...

3-Methylcholanthrene (3MC) administered p.o. has induced tumors of the hamster gastrointestinal tract (GIT), including the large intestine. This process may depend on the concentration of unchanged hydrocarbon in the GIT contents. Benzo(a)pyrene (BP) ingestion could be involved in human GIT carcinogenesis. Accordingly, male Syrian golden hamsters were fed diets containing BP or 3MC for 10 days....

Phytoremediation uses plants and their associated microorganisms in conjunction with agronomic techniques to remove or degrade environmental contaminants. The objective of the field study was to evaluate the effect of vegetation establishment plus fertilizer addition on the biodegradation of alkylated polycyclic aromatic hydrocarbons in a crude oil-contaminated soil. Four replications of the fo...

Background: Petroleum drilling and exploration operations generate a significant amount of oily wastes. Comparing with physical and chemical remediation methods, bioremediation is cost-effective, highly efficient, and environment-friendly technology.Objectives: The aim of this study was to evaluate biological treatment efficiency for an oil-contaminated s...

Background & Aims of the Study: A feed forward artificial neural network (FFANN) was developed to predict the efficiency of total petroleum hydrocarbon (TPH) removal from a contaminated soil, using soil washing process with Tween 80. The main objective of this study was to assess the performance of developed FFANN model for the estimation of   TPH removal. Mater...

Aryl hydrocarbon hydroxylase was induced in the absence of mitogens by several compounds in a stable, human B-lymphocyte cell line (RPMI-1788). Over the dose ranges tested and on molar basis the inducers, in decreasing order of potency, were 2,3,7,8-tetrachlorodibenzo-p-dioxin, dibenz(a,h)-anthracene, 3-methylcholanthrene, benzo(a)pyrene, and 1,2-benzanthracene. Potential inducers which, parado...

In this article we consider what we have learned from the Exxon Valdez oil spill (EVOS) in terms of when bioremediation should be considered and what it can accomplish. We present data on the state of oiling of Prince William Sound shorelines 18 years after the spill, including the concentration and composition of subsurface oil residues (SSOR) sampled by systematic shoreline surveys conducted ...

Anaerobic microbial hydrocarbon degradation is a major biogeochemical process at marine seeps. Here we studied the response of the microbial community to petroleum seepage simulated for 190 days in a sediment core from the Caspian Sea using a sediment-oil-flow-through (SOFT) system. Untreated (without simulated petroleum seepage) and SOFT sediment microbial communities shared 43% bacterial genu...

In this work, a hydrocarbon-degrading bacterium D3-2 isolated from petroleum contaminated soil samples was investigated for its potential effect in biodegradation of crude oil. The strain was identified as Acinetobacter sp. D3-2 based on morphological, biochemical and phylogenetic analysis. The optimum environmental conditions for growth of the bacteria were determined to be pH 8.0, with a NaCl...