The effect of H2 on isomerization pathways and on the acid site density on WOx-ZrO2 catalysts was explored using kinetic measurements of acid-catalyzed o-xylene isomerization reactions. Initial o-xylene isomerization rates on WOx-ZrO2 at 523 K are proportional to the H2 concentration even though H atoms are not involved directly in reaction turnovers, as shown by the low deuterium content in th...

background: the removal of ethylbenzene and xylene at a concentration of 10 mg/l from aqueous solutions by single- and multi-walled carbon nanotubes (swcnt and mwcnt, respectively) and hybrid carbon nanotubes (hcnt) was evaluated at a nanomaterials dose of 1 g/l, a contact time of 10 minutes, and a ph 7. methods: synthetic samples were analyzed by gas chromatography/mass spectrometry (gc/ms). i...

An efficient and cost-effective synthesis of 4,5-dimethylbenzene-1,2-dimethanol is reported. The synthesis is accomplished in three steps with an overall yield of 80%.

The ethyl acetate, chloroform extracts, and the two ‰avonoids kaempferol 1 and kaempferol-3-O-glucoside 2 isolated from whole plants of Thesium chinense Turcz were investigated for their antiin‰ammatory and analgesic activities. For the antiin‰ammatory activity, carrageenan-induced hind paw edema and xylene-induced mouse ear edema models, and for the analgesic activity, the acetic acid-induced ...

Many industrial practices and waste treatment operations produce gas streams containing volatile organic compounds (VOCs) that require treatment. Although biological treatment has been applied successfully to treat many waste gases, the literature contains numerous reports of diminished treatment performance under conditions of excessive drying or low pH in biofilter beds. Use of fungi in biofi...

A family of one-dimensional coordination polymers, [Ag4(O2C(CF2)2CF3)4(phenazine)2(arene) n ]·m(arene), 1 (arene = toluene or xylene), have been synthesized and crystallographically characterized. Arene guest loss invokes structural transformations to yield a pair of polymorphic coordination polymers [Ag4(O2C(CF2)2CF3)4(phenazine)2], 2a and/or 2b , with one- and two-dimensional architectures, r...

Near infrared (NIR) spectroscopy was employed for simultaneous determination of methanol and ethanol contents in gasoline. Spectra were collected in the range from 714 to 2500 nm and were used to construct quantitative models based on partial least squares (PLS) regression. Samples were prepared in the laboratory and the PLS regression models were developed using the spectral range from 1105 to...

Rhodococcus sp. strain DK17 is able to grow on o-xylene, benzene, toluene, and ethylbenzene. DK17 harbors at least two megaplasmids, and the genes encoding the initial steps in alkylbenzene metabolism are present on the 330-kb pDK2. The genes encoding alkylbenzene degradation were cloned in a cosmid clone and sequenced completely to reveal 35 open reading frames (ORFs). Among the ORFs, we ident...

We examine mixture separations with microporous adsorbents such as zeolites, metal-organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs), operating under conditions close to pore saturation. Pore saturation is realized, for example, when separating bulk liquid phase mixtures of polar compounds such as water, alcohols and ketones. For the operating conditions used in industrial pr...