PHR1314

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Levels, sources and health risks of carbonyls and BTEX in the ambient air of Beijing, China.

Yujie Zhang et al.

Journal of environmental sciences (China), 24(1), 124-130 (2012-07-13)

The atmospheric concentrations of carbonyls and BTEX (benzene, toluene, ethylbenzene, m,p-xylene and o-xylene) were measured simultaneously at a same sampling site in Beijing from September 2008 to August 2010. The average concentrations of the total measured carbonyls during autumn, winter

Molecular gauge blocks for building on the nanoscale.

Sergio Grunder et al.

Chemistry (Weinheim an der Bergstrasse, Germany), 18(49), 15632-15649 (2012-10-24)

Molecular gauge blocks, based on 1-7, 9-11 paraxylene rings, have been synthesized as part of a homologous series of oligoparaxylenes (OPXs) with a view to providing a molecular tool box for the construction of nano architectures-such as spheres, cages, capsules

Photocatalytic degradation of gaseous acetone, toluene, and p-xylene using a TiO2 thin film.

Wen J Liang et al.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 45(11), 1384-1390 (2010-07-29)

A nano-structured TiO(2) thin film immobilized on glass springs was prepared by the sol-gel method, and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Acetone, toluene and p-xylene were chosen as common VOCs for a photocatalytic degradation study

Performance and macrokinetic analysis of biofiltration of toluene and p-xylene mixtures in a conventional biofilter packed with inert material.

G Gallastegui et al.

Bioresource technology, 102(17), 7657-7665 (2011-07-01)

Interactions of toluene and p-xylene in air treatment biofilters packed with an inert filter media were studied. The effect of the inlet load of toluene, p-xylene and mixtures of both compounds on the biodegradation rate was analyzed in three lab-scale

Influence of donor-acceptor distance variation on photoinduced electron and proton transfer in rhenium(I)-phenol dyads.

Martin Kuss-Petermann et al.

Journal of the American Chemical Society, 134(30), 12844-12854 (2012-07-20)

A homologous series of four molecules in which a phenol unit is linked covalently to a rhenium(I) tricarbonyl diimine photooxidant via a variable number of p-xylene spacers (n = 0-3) was synthesized and investigated. The species with a single p-xylene

High-speed analysis of residual solvents by flow-modulation gas chromatography

Wittrig RE, et al.

Journal of Chromatography A, 1027(1-2), 75-82 (2004)

p-Xylene oxidation to terephthalic acid: a literature review oriented toward process optimization and development.

Rogério A F Tomás et al.

Chemical reviews, 113(10), 7421-7469 (2013-06-19)

Ultraviolet-stimulated fluorescence and phosphorescence of aromatic hydrocarbons in water ice.

Paul V Johnson et al.

Astrobiology, 11(2), 151-156 (2011-03-23)

A principal goal of astrobiology is to detect and inventory the population of organic compounds on extraterrestrial bodies. Targets of specific interest include the wealth of icy worlds that populate our Solar System. One potential technique for in situ detection

Temperature-dependent differences in community structure of bacteria involved in degradation of petroleum hydrocarbons under sulfate-reducing conditions.

Y Higashioka et al.

Journal of applied microbiology, 110(1), 314-322 (2010-11-10)

The aim of this study was to characterize the microbial community involved in anaerobic degradation of petroleum hydrocarbon under low- and moderate-temperature conditions. Sulfate-reducing enrichment cultures growing on crude oil and p-xylene were established at low and moderate temperatures. Bacterial

Semi-automated peak trapping recycle chromatography instrument for peak purity investigations

Trone MD, et al.

Journal of Chromatography A, 1133(1-2), 104-111 (2006)

Personal exposure to volatile organic compounds in the Czech Republic.

Vlasta Svecova et al.

Journal of exposure science & environmental epidemiology, 22(5), 455-460 (2012-06-07)

Personal exposures to volatile organic compounds (VOCs) were measured in the three industrial cities in the Czech Republic, Ostrava, Karvina and Havirov, while the city of Prague served as a control in a large-scale molecular epidemiological study identifying the impacts

Effect of gamma-irradiation on some chemical characteristics and volatile content of linseed.

Hasan Yalcin et al.

Journal of medicinal food, 14(10), 1223-1228 (2011-05-10)

The effect of irradiation (2.5, 4.0, 5.5, and 7.0 kGy) on chemical properties and volatile contents of linseed was investigated. Consistent decreases were observed in both protein and oil content of the irradiated linseed samples with increasing irradiation doses. The

Synthesis of p-xylene from ethylene.

Thomas W Lyons et al.

Journal of the American Chemical Society, 134(38), 15708-15711 (2012-09-01)

As oil supplies dwindle, there is a growing need to develop new routes to chemical intermediates that utilize alternative feedstocks. We report here a synthesis of para-xylene, one of the highest volume chemicals derived from petroleum, using only ethylene as

Production of p-xylene from biomass by catalytic fast pyrolysis using ZSM-5 catalysts with reduced pore openings.

Yu-Ting Cheng et al.

Angewandte Chemie (International ed. in English), 51(44), 11097-11100 (2012-10-06)

Pores for thought: Chemical liquid deposition of silica onto ZSM-5 catalysts led to smaller pore openings that resulted in >90% selectivity for p-xylene over the other xylenes in the catalytic fast pyrolysis of furan and 2-methylfuran (see scheme). The p-xylene

Isolation and characterization of novel sulfate-reducing bacterium capable of anaerobic degradation of p-xylene.

Yuriko Higashioka et al.

Microbes and environments, 27(3), 273-277 (2012-03-27)

A novel strain of p-xylene-degrading sulfate reducer was isolated in pure culture. Strain PP31 was obtained from a p-xylene-degrading enrichment culture established from polluted marine sediment. Analyses of the 16S rRNA gene and two functional genes involved in sulfate respiration

Physicochemical and biological characterization of long-term operated sulfate reducing granular sludge in the SANI® process.

Tianwei Hao et al.

Water research, 71, 74-84 (2015-01-21)

The SANI(®) process (Sulfate reduction, Autotrophic denitrification and Nitrification Integrated) is a treatment system with low energy demands. The major bioreactor of this new technology is a sulfate-reducing up-flow sludge bed (SRUSB) that converts organics and provides electron donors for

Accelerated hole transfer across a molecular double barrier.

David Hanss et al.

Chemical communications (Cambridge, England), 46(37), 7034-7036 (2010-08-26)

We report on a dyad in which photoinduced hole transfer through a non-uniform molecular double barrier is more than one order of magnitude more rapid than hole transfer across a comparable uniform (rectangular) tunneling barrier.

Analysis of vibrational spectra (FT-IR and FT-Raman) and nonlinear optical properties of organic 2-chloro-p-xylene.

M Govindarajan et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 94, 36-47 (2012-04-19)

In this work, the vibrational spectral analysis was carried out by using FT-Raman and FT-IR spectroscopy in the range 100-4000cm(-1) and 400-4000cm(-1) respectively, for the title molecule. The molecular structure, fundamental vibrational frequencies and intensity of the vibrational bands are

Pure and palladium-loaded Co3O4 hollow hierarchical nanostructures with giant and ultraselective chemiresistivity to xylene and toluene.

Su-Jin Hwang et al.

Chemistry (Weinheim an der Bergstrasse, Germany), 21(15), 5872-5878 (2015-02-26)

Pure and palladium-loaded Co3O4 hollow hierarchical nanostructures consisting of nanosheets have been prepared by solvothermal self-assembly. The nanostructures exhibited an ultrahigh response and selectivity towards p-xylene and toluene. The responses (resistance ratio) of the palladium-loaded Co3O4 hollow hierarchical nanostructures to

Fungal/bacterial interactions during the biodegradation of TEX hydrocarbons (toluene, ethylbenzene and p-xylene) in gas biofilters operated under xerophilic conditions.

Francesc X Prenafeta-Boldú et al.

FEMS microbiology ecology, 80(3), 722-734 (2012-03-03)

The treatment of air contaminated with toluene, ethylbenzene, and p-xylene was assayed in three laboratory-scale biofilters, each consisting of two modules connected in series, packed with a pelletized organic fertilizer and inoculated with a toluene-degrading liquid enrichment culture. Biofilters were

Studies on the reaction of trans-2-heptenal with peanut proteins.

Martin Globisch et al.

Journal of agricultural and food chemistry, 62(33), 8500-8507 (2014-07-30)

Hexanal, 2-heptenal, and nonanal were identified as relevant reaction products formed in the course of the lipid peroxidation of heated peanut oil. For the identification of potential amino acid side chain adducts, kinetic studies between N(α)-benzoylglycyl-l-lysine as a model for

A weight of evidence approach for the assessment of the ototoxic potential of industrial chemicals.

A Vyskocil et al.

Toxicology and industrial health, 28(9), 796-819 (2011-11-09)

There is accumulating epidemiological evidence that exposure to some solvents, metals, asphyxiants and other substances in humans is associated with an increased risk of acquiring hearing loss. Furthermore, simultaneous and successive exposure to certain chemicals along with noise can increase

Development and validation of method for analysis of some ototoxic solvents in saliva matrix by headspace gas chromatography/mass spectrometry.

Monica Gherardi et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 878(26), 2391-2396 (2010-08-24)

The aim of this study was to develop an analytical method to monitor the saliva matrix for ototoxic solvents absorption: the method is based on headspace gas chromatography/mass spectrometry and represents an alternative biological monitoring for investigating low exposure to

Modifying the response of a polymer-based quartz crystal microbalance hydrocarbon sensor with functionalized carbon nanotubes.

Bobby Pejcic et al.

Talanta, 85(3), 1648-1657 (2011-08-03)

This report compares the performance of polymer and carbon nanotube-polymer composite membranes on a quartz crystal microbalance (QCM) sensor for the detection of aromatic hydrocarbons (benzene, toluene, ethylbenzene, p-xylene and naphthalene) in aqueous solutions. Several different polymers (polystyrene, polystyrene-co-butadiene, polyisobutylene

Adsorption of BTX (benzene, toluene, o-xylene, and p-xylene) from aqueous solutions by modified periodic mesoporous organosilica.

Cícero P Moura et al.

Journal of colloid and interface science, 363(2), 626-634 (2011-08-27)

The capacity of a periodic mesoporous organosilica (PMO) to adsorb the aromatic compounds benzene, toluene, o-, and p-xylenes (BTX), which are usually present in produced waters, was investigated under both column and batch processes. The PMO was synthesized by condensation

Evaluating the impact of water supply strategies on p-xylene biodegradation performance in an organic media-based biofilter.

G Gallastegui et al.

Journal of hazardous materials, 185(2-3), 1019-1026 (2010-10-30)

The influence of water irrigation on both the long-term and short-term performance of p-xylene biodegradation under several organic loading scenarios was investigated using an organic packing material composed of pelletised sawdust and pig manure. Process operation in a modular biofilter

Calibration of pre-equilibrium HF-LPME and its application to the rapid determination of free analytes in biological fluids.

Baiqiu Xu et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 980, 28-33 (2015-01-13)

This study establishes a novel calibration method for pre-equilibrium hollow-fiber liquid-phase microextraction (PE-HF-LPME), where the time constant of the extraction of the analyte from sample matrix to the extraction phase (organic solvent) is obtained from a simple concentration curve. Comparing

Adsorption isotherms of some alkyl aromatic hydrocarbons and surface energies on partially dealuminated Y faujasite zeolite by inverse gas chromatography.

Anett Kondor et al.

Journal of chromatography. A, 1362, 250-261 (2014-09-03)

Adsorption isotherm data of some alkyl aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-xylene, m-xylene and p-xylene) measured in the temperature range of 423-523K on a partially dealuminated faujasite type DAY F20 zeolite by inverse gas chromatography are presented in this work.

Treatment of waste gas from the breather vent of a vertical fixed roof p-xylene storage tank by a trickle-bed air biofilter.

Shenteng Chang et al.

Bioresource technology, 102(2), 1028-1034 (2010-11-03)

This study applied a pilot-scale trickle-bed air biofilter (TBAB) system for treating waste gas emitted from the breather vent of a vertical fixed roof storage tank containing p-xylene (p-X) liquid. The volatile organic compound (VOC) concentration of the waste gas

Early hematological and immunological alterations in gasoline station attendants exposed to benzene.

Angela M Moro et al.

Environmental research, 137, 349-356 (2015-01-21)

Elucidation of effective biomarkers may provide tools for the early detection of biological alterations caused by benzene exposure and may contribute to the reduction of occupational diseases. This study aimed to assess early alterations on hematological and immunological systems of

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