ethylbenzene/atrofi

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Evaluation of potential modes of action of inhaled ethylbenzene in rats and mice.

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Potential factors underlying the tumorigenic activity of ethylbenzene (EB) were examined in F344 rats and B6C3F1 mice inhaling 750 ppm EB vapor 6 h/day, 5 days/week, for one or four weeks. Target tissues (kidneys of rats and livers and lungs of mice) were evaluated for changes in organ weights,

Air sampling of aromatic hydrocarbons in the presence of ozone by solid-phase microextraction.

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Effects of ozone on air sampling of standard gas mixtures of aromatic hydrocarbons were tested using solid-phase microextraction (SPME). Standard concentrations of ozone ranging from 10 ppb (v/v) to 6400 ppm (v/v) were generated using an in-house built ozone generator based on corona discharge.

Biodegradation of BTEX at high salinity by an enrichment culture from hypersaline sediments of Rozel Point at Great Salt Lake.

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OBJECTIVE The primary goal of this research was to assess the biodegradation of benzene, toluene, ethylbenzene and xylenes in sediment from Great Salt Lake, near Rozel Point, UT. RESULTS An enrichment culture that degraded benzene or toluene as the sole carbon source at high salinity was developed

PCR-DGGE method to assess the diversity of BTEX mono-oxygenase genes at contaminated sites.

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tmoA and related genes encode the alpha-subunit of the hydroxylase component of the major group (subgroup 1 of subfamily 2) of bacterial multicomponent mono-oxygenase enzyme complexes involved in aerobic benzene, toluene, ethylbenzene and xylene (BTEX) degradation. A PCR-denaturing gradient gel

Engineering cytochrome P-450cam to increase the stereospecificity and coupling of aliphatic hydroxylation.

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Site-directed mutants were constructed in cytochrome P-450cam to re-engineer the stereochemistry and coupling of ethylbenzene hydroxylation. The reaction with wild-type (WT) enzyme produces one regioisomer 1-phenylethanol with 5% reduced nicotinamide adenine deoxyribonucleic acid to product

Anoxic biodegradation of BTEX in a biotrickling filter.

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Emissions of BTEX (benzene, toluene, ethylbenzene and xylene) from the petrochemical industry are characterized by a low pollutants concentration and the absence of oxygen. Biodegradation of these pollutants using nitrate as the electron acceptor is of key interest to reuse the residual gas for

Indoor levels of volatile organic compounds (VOCs) at Florentine museum environments in Italy.

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Indoor air quality monitoring in cultural institutions is of particular concern to protect these places and the cultural heritage content. An indoor monitoring campaign was performed in three museums in Florence (Italy) to determine the occurrence and levels of VOCs. VOCs of interest included BTEX

Exposure profiles, seasonal variation and health risk assessment of BTEX in indoor air of homes at different microenvironments of a terai province of northern India.

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BTEX are known for their ability to deteriorate human health. A monitoring study was conducted at Gorakhpur, for a span of one year. BTEX were sampled by drawing air through activated charcoal tubes, using a low flow SKC model 220 pump. Samples were extracted with CS2 followed by subjecting the

Carbonyl compounds and BTEX in the special rooms of hospital in Guangzhou, China.

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The occurrence of carbonyl compounds and benzene, toluene, ethylbenzene and xylenes (BTEXs) was assessed in the indoor and outdoor air of a hospital in Guangzhou, China. The pharmacy room, the preparing traditional Chinese medicine room, the supply room (where the medical appliances are

Polymeric membranes for aromatic/aliphatic separation processes.

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For the membrane-based separation of benzene/cyclohexane mixtures, the pervaporation properties of different 6FDA (4,4'-hexafluoroisopropylidene diphthalic anhydride) based copolyimide membranes have been investigated. In order to obtain high permeability as well as high selectivity copolyimides

Degradation of petroleum aromatic hydrocarbons using TiO2 nanopowder film.

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The performance of a photo-reactor packed with titanium dioxide (TiO2) immobilized on glass beads, initiated by irradiation with natural and artificial ultraviolet (UV) sources, was evaluated in terms of the degradation efficiency of petroleum aromatic hydrocarbons. The effects of parameters such as

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