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Showing 1 to 20 of 47 for “"chlorobenzene"”.
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Heats of transport in binary liquid mixtures
… Fowler, and Rowley (1982) for the toluene-chlorobenzene-bromobenzene system. In this work, the binary heat of transport, Q, is determined for the toluene-chlorobenzene, chlorobenzene-bromobenzene, and toluenebromobenzene systems. The effect of temperature and composition on the binary heat …
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Evaluation of purging methods when sampling for volatile organic compounds from low-yield monitoring Wells
… the effects various purging procedures have on chlorobenzene and 1,1,1-Trichloroethane concentrations in a simulated monitoring well and how effective purging procedures were in providing representative samples. The experimental apparatus consisted of a teflon monitoring well complete with …
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Metathetic Polymerisation of Cyclic Alkenes
… of cyclopentene as a solution in toluene or chlorobenzene has been investigated by dilatometric and calorimetric techniques using WC16or WC16/02, as the catalyst. These studies indicated the occurrence of a series of reactions between cyclopentene and tungsten hexachloride and that the …
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The enantioselective synthesis of C₁₈-sphingosines
Biocatalytic conversion of chlorobenzene to the corresponding homochiral cyclohexadiene cis-diol (113) allows, through careful symmetry-based planning, the stereodivergent synthesis of all sphingosine stereoisomers. This was achieved via the selective preparation of the appropriate diastereomer of …
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DEVELOPMENT OF A LOW PRESSURE-INDUCTIVELY COUPLED PLASMA-ION SOURCE FOR MASS SPECTROMETRY
… LP helium ICP increased the molecular signal for chlorobenzene, resulting in a detection limit of 2 pg. However, the addition of nitrogen did not aid the production of molecular ions of iodobenzene and dibromobenzene. When 0.07 ml min' of isobuiane was added to the LP-ICP mass spectra similar to …
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Studies of adsorption and stabilization of silica suspensions using well-defined polymeric dispersants
… Adsorption of PEOX from water, alcohols and chlorobenzene onto silica was investigated by measuring PEOX adsorption isotherms using a depletion method. A linear relationship of the plateau adsorption amount, Γ<sub>p</sub> vs. log (molecular weight) was obtained, which agreed qualitatively …
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Solvent-Induced Crystallization of Poly(ether ether ketone)
… tetrahydrofuran, cyclopentanone, chlorobenzene, toluene, diethyl ketone, and ethylbenzene in amorphous PEEK films were found to range from hours to days depending on the level of polymer-solvent interactions. In-situ isochronal DMA spectra show that the Tg of PEEK was suppressed …
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Field comparison of groundwater sampling methods
… installed at a site contaminated by a benzene-chlorobenzene plume, and the comparison was based on the ability of the devices to recover "representative" concentrations of these volatile organic compounds. (Abstract shortened with permission of author.).
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Synthesis of a Highly Porous Polyethylene Membrane Support by Electrospinning- Optimization of the Parameters Involved
… a membrane in pervaporation. For the first time,chlorobenzene combined with tetraoctyl ammonium bromide salt was used as asolvent for electrospinning polyethylene. Polyethylene fiber mat was generated by solution electrospinning technique, and by maintaining the solution temperature at 95 °C. The …
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Potential use of ultrasound in chemical monitoring
… and polyaromatic chloro compounds represented by chlorobenzene and polychlorobiphenyls, respectively, did not form chloride ion as readily as did carbon tetrachloride, chloroform, and trichloroethylene. The results achieved with the organochlorine compounds tested serve as proof-of-principle and …
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Zebra GC: A Fully Integrated Micro Gas Chromatography System
… analytes: benzene, toluene, tetrachloroethylene, chlorobenzene, ethylbenzene, and p-xylene. Limit of Detection (LOD) of ~1 ng was achieved, which corresponds to 10 min sampling time at a flow rate of 1 mL/min for analyte present at ~25 ppbv concentration. An innovative method for generating very …
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Effects of soil moisture, soil carbonate and organic matter content on vapor phase sorption of volatile organic compounds using inverse gas chromatography
… (TCA); benzene; toluene; ethylbenzene; chlorobenzene; heptane; and pentane. Inverse Gas Chromatography (IGC) was the primary method used to measure VOC sorption in these experiments. Sorption for all the evaluated VOCs decreased with increasing moisture. Non-reversibility in the water …
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Formation of microfibers and nanofibers by capillary-driven thinning of drying viscoelastic filaments
… weight poly(methyl methacrylate) solutions in chlorobenzene with a range of mass fractions in the concentrated regime. Very large reductions in the radius of the thinning thread - spanning two to three orders of magnitude - are attainable by careful control of the mass transfer rate and the …
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Investigation of temperature effects on subsurface attenuation of nitroaromatic compounds
… compounds including chloronitrobenzene and chlorobenzene. At abundances of up to 83%, it appears likely that P. stutzeri plays a key role in the biodegradation of NACs at the site. The dominance of a nitrate-reducing microbial species, P. stutzeri, and depleted nitrate concentrations …
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Fabrication and applications of fluorescent polymer fibres
… secondary structures have been collected from chlorobenzene and TBAH solutions. Luminescent concentrators have been developed with cylindrical geometries filled with dye or polymer solutions. Two propagation loss mechanisms have been identified; with a fast initial loss attributed to untrapped …
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Green Organic Solar Cells from a Water Soluble Polymer and Nancrystalline TiO2
… such as xylene, toluene, chloroform, and chlorobenzene. Such solvents are harmful to people and environments, leading to higher costs due to complicated waste disposal processing. This is in conflict with the low cost, green, and renewable energy for which we are aiming. To realize a green …
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Exploration of [2+2+2] cyclotrimerisation reactions of alkynes. A new methodology for the synthesis of small molecules to probe biological systems
… was found to be CpCo(CO)2 at 150 ºC (300 W) in chlorobenzene. This provided a new methodology with potential for synthesising a diverse set of small molecules for biological testing. 20 compounds were subjected to chemosensitivity testing using the MTT assay. Several compounds were shown to …
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Exploration of [2+2+2] cyclotrimerisation reactions of alkynes. A new methodology for the synthesis of small molecules to probe biological systems
… was found to be CpCo(CO)2 at 150 ºC (300 W) in chlorobenzene. This provided a new methodology with potential for synthesising a diverse set of small molecules for biological testing. 20 compounds were subjected to chemosensitivity testing using the MTT assay. Several compounds were shown to …
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Removal of microorganisms and proteins from sewage and industrial waste with chlorinated solvents
… employed were; chloroform, ethylene dichloride, chlorobenzene, carbon tetrachloride, trichloroethane, and dichloroisopropyl ether. Solvents with low vapor pressures and wastes with low concentrations of suspended solids appeared to be the most efficient system. The addition of 20 percent of …
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