A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4(CH3)2. They are produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A widely used industrial solvent.
Salts and esters of hippuric acid.
Toxic, volatile, flammable liquid hydrocarbon byproduct of coal distillation. It is used as an industrial solvent in paints, varnishes, lacquer thinners, gasoline, etc. Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. It was formerly used as parasiticide.
Organic compounds containing carbon and hydrogen in the form of an unsaturated, usually hexagonal ring structure. The compounds can be single ring, or double, triple, or multiple fused rings.
Chemicals necessary to perform experimental and/or investigative procedures and for the preparation of drugs and other chemicals.
Volative flammable fuel (liquid hydrocarbons) derived from crude petroleum by processes such as distillation reforming, polymerization, etc.
Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed)
The maximum exposure to a biologically active physical or chemical agent that is allowed during an 8-hour period (a workday) in a population of workers, or during a 24-hour period in the general population, which does not appear to cause appreciable harm, whether immediate or delayed for any period, in the target population. (From Lewis Dictionary of Toxicology, 1st ed)
The study of the structure of various TISSUES of organisms on a microscopic level.
Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.
Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.
Chlorinated ethanes which are used extensively as industrial solvents. They have been utilized in numerous home-use products including spot remover preparations and inhalant decongestant sprays. These compounds cause central nervous system and cardiovascular depression and are hepatotoxic. Include 1,1,1- and 1,1,2-isomers.

Anaerobic oxidation of o-xylene, m-xylene, and homologous alkylbenzenes by new types of sulfate-reducing bacteria. (1/370)

Various alkylbenzenes were depleted during growth of an anaerobic, sulfate-reducing enrichment culture with crude oil as the only source of organic substrates. From this culture, two new types of mesophilic, rod-shaped sulfate-reducing bacteria, strains oXyS1 and mXyS1, were isolated with o-xylene and m-xylene, respectively, as organic substrates. Sequence analyses of 16S rRNA genes revealed that the isolates affiliated with known completely oxidizing sulfate-reducing bacteria of the delta subclass of the class Proteobacteria. Strain oXyS1 showed the highest similarities to Desulfobacterium cetonicum and Desulfosarcina variabilis (similarity values, 98.4 and 98.7%, respectively). Strain mXyS1 was less closely related to known species, the closest relative being Desulfococcus multivorans (similarity value, 86.9%). Complete mineralization of o-xylene and m-xylene was demonstrated in quantitative growth experiments. Strain oXyS1 was able to utilize toluene, o-ethyltoluene, benzoate, and o-methylbenzoate in addition to o-xylene. Strain mXyS1 oxidized toluene, m-ethyltoluene, m-isoproyltoluene, benzoate, and m-methylbenzoate in addition to m-xylene. Strain oXyS1 did not utilize m-alkyltoluenes, whereas strain mXyS1 did not utilize o-alkyltoluenes. Like the enrichment culture, both isolates grew anaerobically on crude oil with concomitant reduction of sulfate to sulfide.  (+info)

Effect of gemfibrozil in vitro on fat-mobilizing lipolysis in human adipose tissue. (2/370)

Fat-mobilizing lipolysis was studied in rat and human adipose tissue during incubation in vitro by following the release of glycerol into the incubation medium. Gemfibrozil as well as clofibrate consistently and readily inhibited basal as well as noradrenaline-stimulated fat-mobilizing lipolysis in rat fat. With human adipose tissue no effect was observed with gemfibrozil and clofibrate on basal lipolysis. This may be due to the comparatively low rate of the nonstimulated fat-mobilizing lipolysis in human tissue incubated in vitro. When lipolysis was stimulated with noradrenaline as well as isoprenaline, however, both gemfibrozil and clofibrate significantly reduced the fat-mobilizing lipolysis. This inhibition of lipolysis was however not observed in all studies. When lipolysis had been stimulated with theophylline, no inhibition of lipolysis was obtained with either compound. The possibility that reduced fat-mobilizing lipolysis in adipose tissue may cause a lowering of plasma triglycerides by reducing the flow of FFA to the liver is discussed in some detail. It is also suggested that inhibition of lipolysis may be accompanied by increased activity of lipoprotein lipase as well as an increase in the FIAT process. However, the pharmacological implication of the above-mentioned findings, particularly for gemfibrozil, must await further studies, as fairly large doses, around 1 mg/ml of incubation medium, were needed to obtain inhibition of fat-mobilizing lipolysis.  (+info)

Gemfibrozil in a group of diabetics. (3/370)

A group of 14 diabetic patients was treated with gemfibrozil during a variable length of time ranging from nine to 23 weeks in order to establish if a lowering effect on the cholesterol and triglyceride levels could be achieved, as it had been in the case of another group of non-diabetic patients. The present results showed that: (1) The drug is remarkably well tolerated. (2) With doses ranging between 400 and 800 mg per day the magnitude of the effect of the drug was less than that observed in our previous trial with non-diabetic subjects. The effect upon triglycerides seemed to be reduced more than that upon cholesterol when compared with results in higher-dose studies. (3) In this group of diabetic patients (3 insulin dependent, 11 maturity-onset type) control of the diabetic condition was never impaired and appeared in some cases to be slightly improved by gemfibrozil. (4) There was no evidence of undesirable interaction with any of the anti-diabetic drugs used.  (+info)

The evaluation of lipoprotein changes during gemfibrozil treatment. (4/370)

During treatment with gemfibrozil, 1200 mg daily, total serum triglyceride levels were reduced in 7 of the 11 patients, owing chiefly to a fall in VLDL triglyceride levels. Total serum cholesterol responded variably, falling in a majority of patients with hypercholesterolaemia. High density lipoprotein cholesterol rose during treatment in patients who had either hypertriglyceridaemia or hypercholesterolaemia.  (+info)

Adenosylcobalamin-mediated methyl transfer by toluate cis-dihydrodiol dehydrogenase of the TOL plasmid pWW0. (5/370)

We identified and characterized a methyl transfer activity of the toluate cis-dihydrodiol (4-methyl-3,5-cyclohexadiene-cis-1, 2-diol-1-carboxylic acid) dehydrogenase of the TOL plasmid pWW0 towards toluene cis-dihydrodiol (3-methyl-4,5-cyclohexadiene-cis-1, 2-diol). When the purified enzyme from the recombinant Escherichia coli containing the xylL gene was incubated with toluene cis-dihydrodiol in the presence of NAD+, the end products differed depending on the presence of adenosylcobalamin (coenzyme B12). The enzyme yielded catechol in the presence of adenosylcobalamin, while it gave 3-methylcatechol in the absence of the cofactor. Adenosylcobalamin was transformed to methylcobalamin as a result of the enzyme reaction, which indicates that the methyl group of the substrate was transferred to adenosylcobalamin. Other derivatives of the cobalamin such as aquo (hydroxy)- and cyanocobalamin did not mediate the methyl transfer reaction. The dehydrogenation and methyl transfer reactions were assumed to occur concomitantly, and the methyl transfer reaction seemed to depend on the dehydrogenation. To our knowledge, the enzyme is the first dehydrogenase that shows a methyl transfer activity as well.  (+info)

Activation and inactivation of Pseudomonas stutzeri methylbenzene catabolism pathways mediated by a transposable element. (6/370)

The arrangement of the genes involved in o-xylene, m-xylene, and p-xylene catabolism was investigated in three Pseudomonas stutzeri strains: the wild-type strain OX1, which is able to grow on o-xylene but not on the meta and para isomers; the mutant M1, which grows on m-xylene and p-xylene but is unable to utilize the ortho isomer; and the revertant R1, which can utilize all the three isomers of xylene. A 3-kb insertion sequence (IS) termed ISPs1, which inactivates the m-xylene and p-xylene catabolic pathway in P. stutzeri OX1 and the o-xylene catabolic genes in P. stutzeri M1, was detected. No IS was detected in the corresponding catabolic regions of the P. stutzeri R1 genome. ISPs1 is present in several copies in the genomes of the three strains. It is flanked by 24-bp imperfect inverted repeats, causes the direct duplication of 8 bp in the target DNA, and seems to be related to the ISL3 family.  (+info)

Estimation of the dermal absorption of m-xylene vapor in humans using breath sampling and physiologically based pharmacokinetic analysis. (7/370)

A physiologically-based pharmacokinetic model, containing a skin compartment, was derived and used to simulate experimentally determined exposure to m-xylene, using human volunteers exposed under controlled conditions. Biological monitoring was conducted by sampling, in exhaled alveolar air and blood, m-xylene and urinary methyl hippuric acid concentrations. The dermal absorption of m-xylene vapor was successfully and conveniently studied using a breath sampling technique, and the contribution to m-xylene body burden from the dermal route of exposure was estimated to be 1.8%. The model was used to investigate the protection afforded by an air-fed, half-face mask. By iteratively changing the dermal exposure concentration, it was possible to predict the ambient concentration that was required to deliver the observed urinary excretion of methylhippuric acid, during and following inhalation exposure to 50 ppm m-xylene vapor. This latter extrapolation demonstrates how physiologically-based pharmacokinetic modeling can be applied in a practical and occupationally relevant way, and permitted a further step not possible with biological monitoring alone. The ability of the model to extrapolate an ambient exposure concentration was dependent upon human metabolism data, thereby demonstrating the mechanistic toxicological basis of model output. The methyl hydroxylation of m-xylene is catalyzed by the hepatic mixed function oxidase enzyme, cytochrome P450 2E1 and is active in the occupationally relevant, (<100 ppm) exposure range of m-xylene. The use of a scaled-up in vitro maximum rate of metabolism (Vmaxc) in the model also demonstrates the increasingly valuable potential utility of biokinetic data determined using alternative, non-animal methods in human chemical-risk assessment.  (+info)

Guest exchange in an encapsulation complex: a supramolecular substitution reaction. (8/370)

Encapsulation complexes are reversibly formed assemblies in which small molecule guests are completely surrounded by large molecule hosts. The assemblies are held together by weak intermolecular forces and are dynamic: they form and dissipate on time scales ranging from milliseconds to days-long enough for many interactions, even reactions, to take place within them. Little information is available on the exchange process, how guests get in and out of these complexes. Here we report that these events can be slow enough for conventional kinetic studies, and reactive intermediates can be detected. Guest exchange has much in common with familiar chemical substitution reactions, but differs in some respects: no covalent bonds are made or broken, the substrate is an assembly rather than a single molecule, and at least four molecules are involved in multiple rate-determining steps.  (+info)

摘要:派瑞林、派拉伦 ( Parylene) 是一种保护性高分子材料,是 20 世纪 60 年代中期美国联合碳化物公司开发的一种分子级敷型涂层材料,是独特的聚对二甲苯 ( poly-P-xylylene) 聚合物系列的通用名称,也是军事标准中唯一一种固态涂料。在此小编为大家介绍了一下Parylene真空气相沉积工艺及应用。 关键词:Parylene,真空气相沉积工艺,应用 前言       派瑞林、派拉伦 ( Parylene) 是一种保护性高分子材料,是 20 世纪 60 年代中期美国联合碳化物公司开发的一种分子级敷型涂层材料,是独特的聚对二甲苯 ( poly-P-xylylene) 聚合物系列的通用名称,也是军事标准中唯一一种固态涂料。Parylene使用真空气相沉积工艺形成保护膜,这种薄膜具有厚度均匀、致密无针孔、透明无应力等特点,有优异的电绝缘性和防护性。1   Parylene 的分类Parylene
Mixed xylene (CAS 1330-20-7) comprises individual xylene isomers (m-xylene, o-xylene, p-xylene) and ethylbenzene. Data for these substances have been considered in this summary. Exposure levels of the xylene isomers associated with neurological effects in animals are well defined. Acute exposures to concentrations inducing behavioural changes included a 6 hour inhalation exposure to the individual xylene isomers at a concentration of 3000 ppm (Korsak, 1990). Rotarod performance was tested in male rats before and immediately after exposure. The results indicated that the toxic effects of exposure to o- and m-xylene were more pronounced than those of p-xylene at the single exposure level evaluated (Korsak et al, 1994). Sensory deficits resulting from exposure to p-xylene were observed in a key study of the acute neurotoxic effects (Dyer, 1988). A significant depression in amplitude of flash-evoked potential peak N3 was observed following an oral dose of 250 mg/kg or more of p-xylene and following ...
Entry into water may be direct or via atmospheric deposition, runoff and leaching.. Recorded levels in the marine environment. Xylenes have been regularly reported in the oceans, estuaries, precipitation, rivers, groundwaters, potable sources and drinking water, as well as aquatic sediments and biota (Hedgecott 1990, Crookes et al. 1993). High usage and release, high mobility in the atmosphere, and natural sources all contribute to widespread occurrence in waters. Post-1988 data for UK waters were summarised in Hedgecott and Lewis (1997). Most of the data are for estuarine and coastal waters, with xylenes apparently detected in relation to industrial releases of xylenes and releases during oil extraction and transport. None of the published values exceed the concentration of 30 mg l-1 of total xylenes which has been proposed as the annual average EQS value. Fate and behaviour in the marine environment Hedgecott and Lewis (1997) reviewed the fate and behaviour of xylenes.. Atmospheric xylenes are ...
Parylene C is used in a device because of its conformable deposition and other advantages. Techniques to study Parylene C aging were developed, and lessons learned that could be utilized for future studies are the result of this initial study. Differential Scanning Calorimetry yielded temperature ranges for Parylene C aging as well as post-deposition treatment. Post-deposition techniques are suggested to improve Parylene C performance. Sample preparation was critical to aging regimen. Short-term (%7E40 days) aging experiments with free standing and ceramic-supported Parylene C films highlighted lessons learned which stressed further investigations in order to refine sample preparation (film thickness, single sided uniform coating, machine versus laser cutting, annealing time, temperature) and testing issues (necking) for robust accelerated aging of Parylene C. ...
Environmental and biological monitoring were conducted to investigate exposure to xylene (1330207) in technologists in a histology laboratory. Xylene exposure was determined by breathing zone environmental sampling. An estimate of xylene uptake by inhalation was then made by multiplying breathing rate by environmental concentration, length of exposure, and a retention factor. M-methylhippuric-acid
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The properties of p-xylene and m-xylene adsorbed in NaY and KY faujasites have been studied by grand canonical Monte Carlo simulation. Biased particle insertions and deletions were implemented to allow the computation of equilibrium adsorption isotherms of such complex systems. This work is based on a new adsorbatezeolite potential function named TrAZ potential (transferable adsorbatezeolite potential). Adsorption isotherms and isosteric heats of adsorption of pure components have been calculated at 423 K and compared to the available experimental data. Grand canonical Monte Carlo simulations of coadsorption have also been performed. Three binary mixtures corresponding to different gas-phase compositions have been studied. The p-xylene/m-xylene selectivities predicted from the simulation are in good agreement with experiments: the NaY zeolite preferentially adsorbs the m-xylene isomer, whereas the KY faujasite is selective for p-xylene. From a detailed analysis of the xylene adsorption sites, we ...
2,6-dimethylphenol (2,6-DMP) is a product of phenol methylation, especially important for the plastics industry. The process of phenol methylation in the gas phase is strongly exothermic. In order to ensure good temperature equalization in the catalyst bed, the process was carried out using a catalyst in the form of a fluidized bed - in particular, the commercial iron-chromium catalyst TZC-3/1. Synthesis of 2,6-dimethylphenol from phenol and methanol in fluidized bed of iron-chromium catalyst was carried out and the fluidization of the catalyst was examined. Stable state of fluidized bed of iron-chromium catalyst was achieved. The measured velocities allowed to determine the minimum flow of reactants, ensuring introduction of the catalyst bed in the reactor into the state of fluidization. Due to a high content of o-cresol in products of 2,6-dimethylphenol synthesis, circulation in the technological node was proposed. A series of syntheses with variable amount of o-cresol in the feedstock allowed to
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Determination by Modeling of the Interactions during the Adsorption Equilibrium of N-Propanol and Ortho Xylene on Activated Carbon Surface Abstract.
Pseudomonas putida Idaho utilizes toluene, m-xylene, p-xylene, 1,2,4-trimethylbenzene, and 3-ethyltoluene as growth substrates when these hydrocarbons are provided in a two-phase system at 5 to 50% (vol/vol). Growth also occurs on Luria-Bertani medium in the presence of a wide range of organic solvents. The ability of the organism to grow in the presence of organic solvents is correlated with the logarithm of the octanol-water partition coefficient, with dimethyl-phthalate (log P(OCT) = 2.3) being the most polar solvent tolerated. During growth with p-xylene (20% [vol/vol]), there was an initial lag period accompanied by cell death, which was followed by a period of exponential growth. The stationary phase of growth was characterized by a dramatic decrease in cell viability, although cell dry weight and turbidity measurements slowly increased. Electron micrographs revealed that during growth in the presence of p-xylene, the outer cell membrane becomes convoluted and membrane fragments are shed ...
No fertility studies are reported for the aromatic sulphonic acids. These substances are very corrosive as was demonstrated in skin and eye irritation studies, in the acute oral studies, and in the single repeated dose oral study. For animal welfare, long-term exposures to corrosive substances are not recommended. There are however studies for the chemically related hydrotrope substances that looked at reproductive organs and development of offspring. Hydrotropes are the salt form of the sulphonic acids and therefore are used as read-across for this endpoint. The 90-day oral rat and oral mouse studies and the 2-year chronic dermal rat and mouse studies with the closely related compound sodium xylene sulfonate (CAS No. 1300-72-7) included examination of sex organs of both sexes. No treatment related effects on reproductive organs were reported at doses roughly equivalent to those in the developmental toxicity study. The 1994 study with calcium xylene sulphonate (CAS No. 28088-63-3) did not follow ...
Measuring BTX aromatics (Benzene, Toluene & Xylene) is essential, as considered the most toxic components of gasoline & needs to be removed from water
Article Characteristics of benzene, toluene and xylene gas removal by a biofilter using scoria. The biodegradation experiments of Benzene, Toluene and Xylene (BTX) by bacillus culture were carried out. In batch biodegradation experiments of binary mi...
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XYLENE (CAS 1330-20-7) Market Research Report 2018 aims at providing comprehensive data on xylene market globally and regionally (Europe, Asia, North
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The upper operon of the TOL plasmid pWW0 of Pseudomonas putida encodes a set of enzymes which transform toluene and xylenes to benzoate and toluates. The genetic organization of the operon was characterized by cloning of the upper operon genes into an expression vector and identification of their products in Escherichia coli maxicells. This analysis showed that the upper operon contains at least five genes in the order of xylC-xylM-xylA-xylB-xylN. Between the promoter of the operon and xylC, there is a 1.7-kilobase-long space of DNA in which no gene function was identified. In contrast, most of the DNA between xylC and xylN consists of coding sequences. The xylC gene encodes the 57-kilodalton benzaldehyde dehydrogenase. The xylM and xylA genes encode 35- and 40-kilodalton polypeptides, respectively, which were shown by genetic complementation tests to be subunits of xylene oxygenase. The structural gene for benzyl alcohol dehydrogenase, xylB, encodes a 40-kilodalton polypeptide. The last gene of ...
Thin parylene C membranes having smooth front sides and ultrathin regions (e.g., 0.01 μm to 5 μm thick) interspersed with thicker regions are disclosed. The back sides of the membranes can be rough compared with the smooth front sides. The membranes can be used in vitro to grow monolayers of cells in a laboratory or in vivo as surgically implantable growth layers, such as to replace the Bruchs membrane in the eye. The application further provides an implantable cage-like apparatus for culturing cells comprising the parylene membrane.
Methods of making parylene AF4 using novel that result in reduced cost. Low dilution technology may used to provide parylene AF4 in substantially improved yields. The relative amount of transition metal catalyst can be decreased. The amount of undesired byproduct is also reduced.
Benzene, toluene, ethylbenzene and xylene, also known as BTEX, are released into environmental media by petroleum product exploratory and exploitative activities and are harmful to humans and animals. Testing the effects of these chemicals on a significantly large scale requires an inexpensive, rapidly developing model organism such as Drosophila melanogaster. In this study, the toxicological profile of benzene, toluene, ethylbenzene, p-xylene, m-xylene, and o-xylene in D. melanogaster was evaluated. Adult animals were monitored for acute toxicity effects. Similarly, first instar larvae reared separately on the same compounds were monitored for the ability to develop into adult flies (eclosion). Further, the impact of fixed concentrations of benzene and xylene on apoptosis and mitosis were investigated in adult progenitor tissues found in third instar larvae. Toluene is the most toxic to adult flies with an LC50 of 0.166 mM, while a significant and dose-dependent decrease in fly eclosion was observed
* found in: Xylenes, AR® (ACS), p-Xylene, Xylene, Histological Grade, Xylenes, Purified, o-Xylene, m-Xylene, 99%, Xylenes ACS Reagent, ACS Reagent, p..
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Emissions of Volatile Organic Compounds (VOCs) at oil transfer stations are high and the primary pollutants of concern from a health perspective include benzene, toluene, ethylbenzene, and xylene (BTEX) BTEX. This exploratory study investigated personal exposure to BTEX through environmental air samples collected from 50 workers (tanker loading workers, tank-gauging workers, drivers, firefighters, and office workers) at a major oil distribution company in Iran. Airborne BTEX exposures were evaluated over 8-hour periods during work-shift by using personal passive samplers. Measured mean values for workers at four sites were, respectively, 2437, 992, 584, and 2788 mu g/m(3) for benzene; 4415, 2830, 1289, and 9407 mu g/m(3) for toluene; 781, 522, 187, and 533 mu g/m(3) for ethylbenzene; and 1134, 678, 322, and 525 mu g/m(3) for xylene. Exposure across job type was similarly stratified across all personal exposures to BTEX measured in air samples with maximum concentrations found for tanker loading ...
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Background: Today, advances in different areas of science and technology along with their application in industries have led to an increase in dangerous pollutants which can resist biodegradation. Volatile organic compounds (VOCs) are regarded as important factors of air pollution in closed environments. Xylene is one of these compounds which ...
Gafrarium divaricatum were exposed to xylene (4.25 and 8.50 mg l(-1)), benzene (4.35 and 8.70 mg l(-1)) and gear oil-WSF (1 and 2%) for 30 days. Chronic exposure of clams to the pollutants resulted in loss of bubbling epithelium, reduction in cytoplasm volume and density, fusion of cell membranes and nuclei forming darkly stained area at basal part of the cells. Disintegration of basement membrane due to damaged epithelial cells, disruption of inner lining of tubule, formation of necrotic spaces, separation of epithelial cells from basement membrane, increase in internal luminar area, complete necrosis of epithelial cells as well as occurrence of cell debris in between the tissue were also observed in the clams due to chronic exposure of the toxicants.
The NSW Environment Protection Authority (EPA) has issued a $15,000 fine to Parchem Construction Supplies Pty Ltd after a chemical spill at the companys premises in Wyong.. EPA Hunter Region Manager, Adam Gilligan, said the EPA attended the incident with Fire and Rescue crews on 13 October 2015.. Fire and Rescue New South Wales Hazmat (FRNSW Hazmat) and the EPA attended the premises. The site was evacuated whilst Hazmat undertook a clean-up recovery operation.. The spill occurred when a flammable wash solvent mix containing acetone and xylene was being moved by forklift as part of a decanting process. The mixing pot containing the chemicals was not secured adequately to the forklift, and 700 litres of the mix was spilt.. Acetone is a volatile organic solvent, which is toxic in high doses. When exposed to the air, it quickly evaporates and remains highly flammable, while short-term inhalation to mix can result in irritation of the eyes, nose, and throat, said Mr. Gilligan.. The spill ...
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The persistence of neurobehavioral effects in female rats (Mol:WIST) exposed to 500 ppm technical xylene (dimethylbenzene, GAS-no 1330-20-7) for 6 hours per day on days 7-20 of prenatal development was studied. The dose level was selected so as not to induce maternal toxicity or decreased viability of offspring. Investigations of learning and memory abilities were performed using a Morris water maze. This task requires rats to spatially navigate, using distal extramaze cues to locate a small platform under the surface of the water in a large pool. At the age of 16 weeks, the exposed offspring showed impairments when the platform was relocated in the pool. Impaired performances after platform relocation were also observed in exposed offspring at 28 and 55 weeks of age, although the difference was not statistically significant at 55 weeks. These data could indicate that the effect was partly reversible, although over a long time period. However, another explanation could be that the animals became ...
Physico-chemical data are available for m, p and o xylene. Data on physical properties were obtained from a number of secondary sources. The data in these secondary sources are based on a critical evaluation of peer-reviewed data and the selected values are considered to be reliable and representative of the property under investigation. Information on the review process was documented in the introduction of the source. The use of Klimisch codes (Klimisch et al. 1997) was extended to these secondary sources and a reliability code of (2) valid with restrictions was assigned when using the authoritative secondary source. For the key values, the mean values of selected physico-chemical properties were used. The data show that m-xylene and o-xylene are liquids and although p-xylene is considered to be a solid, it has a low melting point. Therefore the flammability classification for the isomers has been determined following the criteria for flammable liquids. The flash point and boiling point of ...
In contrast to other conformal coatings that are brushed, dipped, or sprayed onto a substrate, parylene is applied via a vapor-deposition process in a vacuum chamber. During this vapor deposition polymerization process, raw dimer in powder form is subjected to high heat and, in turn, transforms into a gaseous monomer without an intermediate liquid stage. This gas is then deposited one molecule at a time onto the desired substrate in the coating chamber at ambient temperatures. Finally, the cold trap phase cools temperatures down to a range of -90° to -120°C in order to remove residual parylene.. This unique vapor-deposition method allows parylene to adequately penetrate and coat extremely small stent features. In addition, this process enables the uniform and consistent coating of the complex geometries that characterize the life-saving devices. Deposited in a 0.5-micron-layer thickness, parylene is also pinhole free and can fully coat inside crevices and contours as small as 0.001 mm. ...
Among the range of materials used in bioengineering, parylene-C has been used in combination with silicon oxide and in presence of the serum proteins, in cell patterning. However, the structural properties of adsorbed serum proteins on these substrates still remain elusive. In this study, we use an optical biosensing technique to decipher the properties of fibronectin (Fn) and serum albumin adsorbed on parylene-C and silicon oxide substrates. Our results show the formation of layers with distinct structural and adhesive properties. Thin, dense layers are formed on parylene-C, whereas thicker, more diffuse layers are formed on silicon oxide. These results suggest that Fn acquires a compact structure on parylene-C and a more extended structure on silicon oxide. Nonetheless, parylene-C and silicon oxide substrates coated with Fn host cell populations that exhibit focal adhesion complexes and good cell attachment. Albumin adopts a deformed structure on parylene-C and a globular structure on silicon ...
TY - JOUR. T1 - Estimation of glycated hemoglobin by 2,6-dimethylphenol. T2 - Sulphuric acid conventional method. AU - Mallya, H. M.. AU - Pattabiraman, T. N.. PY - 2001/12/1. Y1 - 2001/12/1. N2 - Glycated hemoglobin levels in hemolysate of normal and diabetic patients were determined by the 2,6-dimethylphenol:57.5% sulphuric acid conventional method and the values were 0.39±0.025 and 0.69±0.21 moles of hydroxymethylfurfural (HMF)/mole of globin, respectively. The mean increase in glycated hemoglobin values in diabetics (1.8 fold) was highly significant (p,0.001). A good correlation (r=0.95) was found between the glycated hemoglobin values obtained by this method and the phenohsulphuric acid method. The values obtained by former method were about 1.2-1.4 times the values by the phenohsulphuric acid method. This study indicates that conventional 2,6- dimethylphenol:57.5% sulphuric acid method is more sensitive for the estimation of glycated hemoglobin than any other method based on the same ...
Dntl provides Mix Xylenol with synonyms Dimethylphenol , Hydroxydimethylbenzene and cas no 1300-71-6 to be used in Fragrances. Cresylic acid, Mix cresols, Mix isomers of dimethyl Phenol, Solvents in wire enamel and organic intermediate in manufacturing perfume for Fragrances are the applications of Mix Xylenol in Fragrances.
In this experiment, I recrystallized garden sulfur (90% pure) to make pure sulfur crystals that gleam in the light and are a light yellow color. First, I acquired a solvent for sulfur. Since sulfur dissolves well in toluene, xylene, and carbon disulfide, I picked the most common option--xylene. My xylene came from paint thinner (it listed xylene as an component). To separate the xylene from the methanol and acetone also in the paint thinner, I mixed equal volumes of water and paint thinner and vigorously shook. This should be done outside, as the vapors are unhealthy. I poured the mixture into a graduated cylinder and let it settle for 15 minutes. The xylene, which is insoluble in water, floated at the top, while the acetone and methanol remained in the water layer. I syringed off the xylene and ended up with ~45mL from three 50mL batches of paint thinner ...
Xylene has been generally used as a clearing and deparaffinizing agent in histology. Because of the potential toxic and flammable nature of xylene, its substitutes have been introduced into some laboratories. In this study, we introduced a novel, non-toxic xylene substitute (SBO), which was generated through a mixture of 86% of white oil No.2 and 14% of N-heptane. SBO had a high boiling point (188°C) and flash point (144°C) coupled with a scentless and decreased volatility. To compare the effectiveness of SBO and xylene in histology, a wide range of tissue samples from rats and human beings were processed in parallel in SBO and xylene, subjected to various staining procedures. Similar to the xylene-processed paraffin blocks, the SBO-processed counterparts were easy to section without any evidence of cell shrinkage. Assessment of the SBO-treated sections stained with hematoxylin-eosin revealed a good maintenance of cell morphology and structure, and a clear definition of the cytoplasm and the ...
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151677-97-3 - Acetaldehyde, polymer with 2,5-dimethylphenol, formaldehyde, 3-methylphenol and 4-methylphenol - Searchable synonyms, formulas, resource links, and other chemical information.
Fixed thin film, gas/vapor phase bioreactors were assessed relative to their potential for the bioprocessing of methane, trichloroethylene (TCE), and p-xylene. Methanotrophic bacteria were used to process the methane and TCE while a xylene resistant strain of Pseudomonas putida was used to process the p-xylene. Comparisons between the gas phase bioreactors and conventional shaken cultures and sparged liquid bioreactors showed that the gas phase bioreactors offer advantages over the other two systems for the degradation of methane in air. Rates of methane removal with the gas phase bioreactors were 2.1 and 1.6 fold greater than those exhibited by the shaken cultures and sparged liquid bioreactors, respectively. The gas phase bioreactors were shown to have application for the removal of TCE vapors from air with a removal rate of approximately 9 μg TCE d-1 bioreactor-1. Xylene vapors were also scrubbed from air using gas phase bioreactors. At a feed rate of 140 μg of xylene min-1, approximately ...
This study assessed effects of exposure to p-xylene, a ubiquitous air pollutant, on mice infected with murine cytomegalovirus (MCMV), a mouse model for a common human virus. Mice were exposed to filtered air, 600 or 1,200 ppm p-xylene 6 h/d for 4 d and infected with a sublethal dose of MCMV after the first exposure. No deaths occurred among uninfected, p-xylene-exposed mice or infected, air-exposed mice; 34% and 0% mortality occurred respectively in infected mice exposed to 1,200 and 600 ppm p-xylene. Virus titers in the liver and splenic natural killer cell activity were unaffected by exposure to 1,200 ppm p-xylene. MCMV significantly suppressed and p-xylene significantly increased total P-450 levels in the liver, but there was no significant interaction between the two Isozymes 1A1, 2B1/B2, and 2E1 were decreased to a similar degree, suggesting that the virus does not target specific isozymes. Enhanced mortality was not due to immune suppression. While p-xylene potentiated liver damage was ...
Background|br /|The genetic network of the TOL plasmid pWW0 of the soil bacterium Pseudomonas putida mt-2 for catabolism of m-xylene is an archetypal model for environmental biodegradation of aromatic pollutants. Although nearly every metabolic and transcriptional component of this regulatory system is known to an extraordinary molecular detail, the complexity of its architecture is still perplexing. To gain an insight into the inner layout of this network a logic model of the TOL system was implemented, simulated and experimentally validated. This analysis made sense of the specific regulatory topology out on the basis of an unprecedented network motif around which the entire genetic circuit for m-xylene catabolism gravitates.|br /|Results|br /|The most salient feature of the whole TOL regulatory network is the control exerted by two distinct but still intertwined regulators (XylR and XylS) on expression of two separated catabolic operons (upper and lower) for catabolism of m-xylene. Following model
CAS 121-75-5 1330-20-7 UPC01641C ORTHO MALATHION 50 PLUS INSECT SPRAY malathion, o,o-dimethyl dithiophosphate of diethylxylene, dimethylbenzene, xylol (iarc - group 3) *95-1*aromatic petroleum derivative solventinert ients msds toxicity property
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TABLE-US-00003 TABLE 2 Solvents and Polycarbonate Discs Pattern Color Color Change Upon Solvent After IPA Description Conc., % Treatment Contact Durability Behavior 1,2- 100% NA NA NA Dissolves surface Dichlorethane but forms circular trace 2-Octanone, 98% 100% Whitish blue Clear Durable Spreads out Acetone/p- xylene 20%/80% White/Blue Clear Durable Solution Spreads out on tensile bone Benzyl Alcohol, 100% Powdery blue Almost wipes Scratchable Not a uniform anhydrous 99.8% clear shape, spreads out Benzyl Alcohol/p- 10%/90% Whitish blue Light blue Durable NA/Applied on xylene leur part only Calcium 1%/99% Bright white Clear Rubs off Circular but Stearate/p-xylene spreads out. Cracks form as solution dries Chlorobenzene 100% Light blue Somewhat clear Durable Circular, some pores visible Chloroform 100% NA NA NA Evaporates but reappears/smears when acetone is applied Cumene, 98% 100% White/blue Clear Scratchable circular Cumene, 98%/p- 5%/95% White Clear Durable circular xylene Cyclohexanone 100% ...
The heterogeneous oxidation of some substituted phenols has been studied by means of electron spin resonance. Strong signals, observed during the oxidation of the phenols with a free para-position, are due to secondary radicals derived from C4-O linked dimeric and polymeric phenols (A) are not to substituted 4, 4-di-pheno-semiquinones (B). Special attention has been given to the oxidation of 2, 6-dimethylphenol which yields a radical with non-equivalent methyl groups. The e. s. r. spectra of the secondary radicals from some 4-substituted 2, 6-dimethylphenol are identical to each other and to that from 2, 6-dimethylphenol itself. This indicates that in these radicals the para-substituent had been displaced by an aryloxy group. The ease of this displacement can be determined by use of the flow technique. ...
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TY - GEN. T1 - A comprehensive biological and chemical model for in situ biodegradation of BTEX. T2 - 220th ACS National Meeting. AU - Maurer, Max. AU - Rittmann, Bruce. PY - 2000. Y1 - 2000. N2 - A comprehensive biological and chemical model was presented for the in situ biodegradation of BTEX (constitutes the greatest mass of compounds that partition from fuels into groundwater), focusing on the underlying chemical and biological processes that affect measurable chemical properties of a groundwater in which biodegradation of BTEX may be taking place. Under aerobic conditions, the biodegradability was high for all compounds. Under anaerobic conditions the electron acceptors nitrate, iron, manganese, and sulfate could be used for the degradation of most of the BTEX compounds. Under fermentative methanogenic conditions, all BTEX compounds seemed to be degradable. Abiotic chemical reactions had the potential to alter the chemical speciation of a groundwater significantly.. AB - A comprehensive ...
Ethylbenzene and para-xylene (p-xylene), but not the chemically closely related organic solvents ortho-xylene (o-xylene) and meta-xylene (m-xylene), are known to cause ototoxicity and irreversible hearing loss, though the underlying mechanisms are still unknown. In this study, effects of ethylbenzene and of p-, o-, and m-xylene on human heteromeric α9α10 nicotinic ... read more acetylcholine receptors (nAChRs) expressed in Xenopus oocytes were investigated using the two-electrode voltage clamp technique. ACh dose-dependently evoked an α9α10 nAChR-mediated ion current with an EC50 of 137 μM. When ACh is applied at a low concentration (10 μM), the nAChR-mediated ion current is inhibited by a low concentration (10 μM) of ethylbenzene and p-xylene, but not by the same concentration of the non-ototoxic solvents. At a high solvent concentration (300 μM), all solvents cause inhibition of the ion currents evoked by 10 μM ACh. Ion currents evoked by a near maximum-effective concentration ACh (1 ...
Corresponding author: [email protected], [email protected] ABSTRACT. Caralluma edulis (Edgew.) Benth. ex Hk.f. (Asclepiadaceae) is traditionally used for the management of rheumatism. The current study aimed to assess the anti-inflammatory effect of Caralluma edulis, to explain its medicinal use in inflammatory ailments. Caralluma edulis crude extract (Ce.Cr) was investigated in acute (carrageenan and xylene mediated) and chronic (formalin evoked) models of inflammation in mice. Ce.Cr which shows the presence of alkaloids, glycosides, flavonoids, saponins, phenols, terpenes and tannins caused dose-dependent (100, 300 and 1000 mg/kg) reduction of the carrageenan, xylene and formalin-induced inflammation (P , 0.05, P , 0.001 vs. saline group). At the lower dose of 30 mg/kg it was effective in inhibiting the xylene mediated ear edema. No mortality observed with Ce.Cr upto 5 g/kg. This study reveals that Caralluma edulis possess therapeutic ability to reduce inflammation, hence ...
The spatiotemporal variability of ambient volatile organic compounds (VOCs) in Tehran, Iran, is not well understood. Here we present the design, methods, and results of the Tehran Study of Exposure Prediction for Environmental Health Research (Tehran SEPEHR) on ambient concentrations of benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene (BTEX), and total BTEX. To date, this is…
Carbon nanotube networks are an emerging conductive nanomaterial with applications including thin film transistors, interconnects, and sensors. In this letter, we demonstrate the fabrication of single-walled carbon nanotube (SWNT) networks on a flexible polymer substrate and then provide encapsulation utilizing a thin parylene-C layer. The encapsulated SWNT network was subjected to tensile tests while its electrical resistance was monitored. Tests showed a linear-elastic response up to a strain value of 2.8% and nearly linear change in electrical resistance in the 0%â€2% strain range. The networks’ electrical resistance was monitored during load-unload tests of up to 100 cycles and was hysteresis-free ...
The Indian paint industry has been witnessing a gradual shift in the preferences of people from the traditional whitewash to high quality paints like emulsions and enamel paints, which is providing the basic stability for growth of Indian paint industry. Besides, it is creating a strong competitive market, where players are utilizing different strategies to tap the growing demand in the market for a larger share. Moreover, rise in disposable income of the average middle class coupled with increasing investment on education; urbanization; development of the rural market; and various launches of many innovative products, like friendly, odor free, and dust & water resistant paints, are major drivers that are propelling the growth of the paint market in India.. As per our report India Paint Industry Outlook 2022, provides study of Indian paints industry by value and volume, which is expected to grow at a CAGR of around 12% during 2018-19 to 2021-22 in value terms. The reports provide an in-depth ...
2011. López-Ruiz Heraclio,* Cortés-Hernández Mayra, Rojas- Lima Susana, Höpfl Herbert. Synthesis of nitrogen-, oxygen- and sulphur-containing tripodal ligands with a trimethylbenzene core. Journal of the Mexican Chemical Society, 55(3), 168-175. (2011). ...
Note: In all staining procedures for fecal and gastrointestinal tract specimens, the term Xylene will be used in the generic sense. Xylene substitutes are recommended for the safety of all personnel performing these procedures. 1. Prepare slide for staining. 2. Remove the slide from Schaudinns Fixative (30 minutes fixation time), and place it in 70% ethanol for 5 minutes. 3. Place the slide in 70% ethanol plus iodine for 1 minute for fresh specimens or 5 to 10 minutes for PVA air-dried smears. 4. Place the slide in 70% ethanol for 5 minutes.* 5. Place the slide in a second container of 70% ethanol for 3 minutes.* 6. Place the slide in trichrome stain for 10 minutes (staining times may vary on the thickness of the fecal material and/or the number of slides stained at one time). 7. Place the slide in 90% ethanol plus acetic acid for 1 to 3 seconds. Immediately drain the rack, and proceed to the next step. Do not allow slides to remain in this solution. 8. Dip the slide several times in 100% ...
cc: Subject: Re: Eosin bleeding out Hello, Long time since I posted. Please if anyone out there in HistoLand can tell me what causes and how can I get rid of Eosin counterstain bleeding out of frozen tissue sections after they are coverslipped and are drying. Once in awhile this is a problem. I have not changed any solutions or technique or mounting media. I use the following protocol: 1. Rapid Fixx-10 to 15 secs 2. Tap water rinse x2 3. Gill 3 Hemotoxylin 35-60 seconds depending on age of stain 4. Tap water rinse at the sink until water is clear 5. Lithium Carbonate Bluing-5 to 7 dips 6. 200 proof Ethanol-10 dips 7. 1% Alcoholic Eosin-2 quick dips 8. 200 proof Ethanol-4 containers-10 dips each 9. 200 proof Ethanol-1 container-1 minute 10.Xylene Substitute-Histosolve for 30 secs to a minute or longer. Coverslip with Histosolve and a Xylene Substitute mounting media-Histomount I get all my reagents except Ethanol from Shandon and have been very happy with staining quality. Any ideas! Thanks in ...
For implantable devices, Parylene C (hereafter referred to as Parylene) has shown promising properties such as flexibility, biocompatibility, biostability, and good barrier properties. Parylene-based flexible interconnection cable (FIC) was previously developed to connect a flexible penetrating microelectrode array (FPMA) with a recording system. However, Parylene-based FIC was difficult to handle and prone to damage during the implantation surgery because of its low mechanical strength. To improve the mechanical properties of the FIC, we suggest a mechanically enhanced flexible interconnection cable (enhanced FIC) obtained using a combination of Parylene and polyimide. To investigate the long-term stability of the enhanced FIC, Parylene-only FIC, and enhanced FIC were tested and their mechanical properties were compared under an accelerated aging condition. During the course of six months of soaking, the maximum strength of the enhanced FIC remained twice as high as that of the Parylene-only ...
-Xylene; Nonane; 1,2,4-Trimethylbenzene; Decane; 1,2,3-Trimethylbenzene; Undecane; Durene; Naphthalene; 2-Methylnaphthalene solution; 1-Methylnaphthalene
TY - JOUR AU - Jovanovic, T. AU - Koruga, Dj. AU - Jovančićević, Branimir AU - Vajs, Vlatka AU - Dević, Gordana PY - 2013 UR - http://cer.ihtm.bg.ac.rs/handle/123456789/1300 AB - The basic C-60 and C-70, and the higher fullerenes, mainly C-76 and C-84, were extracted by original procedures, with p-xylene and the mixture of xylenes from the samples of initial carbon soot, produced in electrical arc. The extracts were obtained in increased and high yields of 6% and 11.9%, respectively, due to application of the advanced procedures. The solubility of fullerenes in these solvents was compared. Chromatographic separation of the basic and the higher fullerenes from the obtained p-xylene extract was performed by continue elution, in one phase of the process, under atmospheric pressure, with original, defined gradient of solvents, from pure hexane to 75% toluene in hexane, on active Al2O3 column, by a new, improved method. Comparative spectroscopic characterization of the obtained purified fullerene ...
Complete article is available online.. PDF version is available online.. Purpose: To determine the precision and cost-effectiveness of the pHydrion(TM) ammonia test relative to the Draeger(TM) volumetric pump/ammonia detector tube method in measuring ammonia concentrations in swine barns.. Methods: Ammonia concentrations in farrowing, nursery, finisher, and gestating barns were monitored for 8 weeks using both the pHydrion(TM) test strips and the Draeger(TM) unit. The ammonia measurements were compared using bivariate correlation analysis. Average ammonia concentrations in each barn type were compared using an ANOVA. The precision and cost-effectiveness of each assay were demonstrated by plotting the width of the confidence interval by the number of dollars available for ammonia detection, as well as by the number of tests performed.. Results: The mean ammonia concentrations differed by room type (P ,.05) and increased in the following order: nursery, farrowing, gestating, and finishing rooms. ...
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Environmental and Occupational Diseases could be grouped as follows: 1. Diseases caused by chemical agents. 1.1 Disease caused by benzene or its toxic homologues. 1.2 Disease caused by toluene or its toxic homologues. 1.3 Disease caused by styrene or its toxic homologues. 1.4 Disease caused by xylene or its toxic homologues. 1.5 Disease caused by cadmium or its toxic compound. 1.6 Disease caused by chromium or its toxic compound. 1.7 Disease caused by manganese or its toxic compound. 1.8 Disease caused by arsenic or its toxic compound. 1.9 Disease caused by mercury or its toxic compound. 1.10 Disease caused by mercury or its toxic compound. 1.11 Diesease caused by chlorine. 1.12 Disease caused by ammonia. 1.13 Disease caused sulphur dioxide or sulphuric acid. 1.14 Disease caused by carbon monoxide. 1.15 Disease caused by hydrogensulphide. 1.16 Disease caused by pesticides. 2. Diseases caused by physical agents. 2.1 Hearing impairment caused by noise. 2.2 Disease caused by heat radiation. 3. ...
0230]In a 2-L autoclave were charged 381 g of toluene and 136 g of 1,3,5,7-tetramethylcyclotetrasiloxane. After the gas phase was substituted with nitrogen, the mixture was heated while stirring at an internal temperature of 60° C. Thereto was added a mixed solution of 100 g of vinylcyclohexeneoxide(1,2-epoxy-4-vinylcyclohexane), 100 g of toluene and 0.0262 g of a solution of a platinum vinylsiloxane complex in xylene (containing 3 wt % by platinum) dropwise over 60 min. After completing the dropwise addition, the internal temperature was elevated to 70° C., and the reaction was allowed for 60 min. The reaction rate of the vinyl group was then determined with 1H-NMR to be no less than 95%. The internal temperature was elevated to 105° C., and a mixture of 44.5 g of triallyl isocyanurate, 44.5 g of toluene and 0.0174 g of a solution of platinum vinylsiloxane complex in xylene (containing 3 wt % by platinum) was added dropwise over 40 min. After completing the dropwise addition, the internal ...
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MIME-version: 1.0 X-Mailer: Unknown (No Version) Content-type: multipart/alternative; boundary=Boundary_(ID_5HQm6aniGbkbsRDFTPmCng) --Boundary_(ID_5HQm6aniGbkbsRDFTPmCng) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Hello all. I could really use some help. Today, the pathologist called to say that she is seeing an artifact on the tissue. It looks like clusters of fine PCP organisms, only that they are not. Like someone took a very fine tip black marker and made circles around the cells. She said it is not on every slide. The slides she had me check were prostate needle bxs and an antrum bx. The only change in our routine has been that we are demonstrating a recycling system for alcohol and Xylene. I have not used the recycled product on the tissue processor or the H&E autostainer, but I have placed the recycled Xylene in our glass Coverslipper. I appreciate any and all comments. Thank you. Ryan Allan Memorial --Boundary_(ID_5HQm6aniGbkbsRDFTPmCng) Content-type: ...
The consequences of acute xylene publicity to the enkephalinergic neuromodulatory technique were studied in rats. Male Sprague-Dawley rats have been injected ip with 0 or 1.6 mL/kg xylene every day for three consecutive times. 3 hr following the last dose, they ended up killed and also the brains were being eradicated. The brains ended up dissected in the parietal cortex. caudate putamen, medial preoptic regions of the hypothalamus, globus pallidus, olfactory tubercle, and central amygdaloid nuclei (CA). The assorted Mind components were being analyzed for improvements of their met-enkephalin content by an immunostaining procedure ...
The mixture is referred to as both xylene and, more precisely, xylenes. Mixed xylenes refers to a mixture of the xylenes plus ... 98% of p-xylene production, and half of all xylenes produced is consumed in this manner. o-Xylene is an important precursor to ... Commercial or laboratory-grade xylene produced usually contains about 40-65% of m-xylene and up to 20% each of o-xylene, p- ... m-Xylene) NIOSH Pocket Guide to Chemical Hazards (p-Xylene) Xylene, Hazard Summary (EPA) (Mixed Isomers) The Ear Poisons, The ...
It is a constitutional isomer of m-xylene and p-xylene, the mixture being called xylene or xylenes. o-Xylene is a colourless ... m-Xylene is isomerized to o-xylene. Net production was approximately 500,000 tons in the year 2000. o-Xylene is largely used in ... o-Xylene (ortho-xylene) is an aromatic hydrocarbon with the formula C6H4(CH3)2. with two methyl substituents bonded to adjacent ... Most o-xylene is produced by cracking petroleum, which affords a distribution of aromatic compounds, including xylene isomers. ...
Effects vary with animal and xylene isomer. Concerns with xylenes focus on narcotic effects. Overexposure of p-xylene in humans ... o-xylene and m-xylene. All have the same chemical formula C6H4(CH3)2. All xylene isomers are colorless and highly flammable. ... "p-Xylene". International Chemical Safety Cards. ICSC/NIOSH. July 1, 2014. P-Xylene: toxicity for rats "Xylenes". Immediately ... p-Xylene is produced by catalytic reforming of petroleum naphtha as part of the BTX aromatics (benzene, toluene and the xylene ...
Once mixed with the sample, the concentration of xylene cyanol is typically about 0.005% to 0.03%. In 1% agarose gels, xylene ... Xylene cyanol on a 6% polyacrylamide gel migrates at the speed of a 140 base pair DNA fragment. On 20% denaturating (7 M urea) ... Xylene cyanol can be used as an electrophoretic color marker, or tracking dye, to monitor the process of agarose gel ... Xylene cyanol at OpenWetWare (Articles without EBI source, Articles without KEGG source, Articles without UNII source, Articles ...
Effects vary with animal and xylene isomer. Concerns with xylenes focus on narcotic effects. Tetrachloro-m-xylene Nomenclature ... o-xylene and p-xylene. All have the same chemical formula C6H4(CH3)2. All xylene isomers are colorless and highly flammable. ... The conversion m-xylene to isophthalic acid entails catalytic oxidation. meta-Xylene is also used as a raw material in the ... m-Xylene (meta-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as ...
See also: p-xylene (data page) o-xylene (data page) This box: view edit Except where noted otherwise, data relate to Standard ... This page provides supplementary chemical data on m-Xylene. The handling of this chemical may incur notable safety precautions ...
See also: m-xylene (data page) p-xylene (data page) This box: view edit Except where noted otherwise, data relate to Standard ... This page provides supplementary chemical data on o-Xylene. The handling of this chemical may incur notable safety precautions ...
This page provides supplementary chemical data on p-xylene. The handling of this chemical may incur notable safety precautions ...
Para - xylene Production. From the website of GTC Technology, Houston, Texas. The Future of Benzene and Para-Xylene after ... and the three xylene isomers, all of which are aromatic hydrocarbons. The xylene isomers are distinguished by the designations ... Likewise, the para-xylene consumption showed unprecedented growth in 2010, growing by 2,800,000 tons, a full ten percent growth ... The BTX Chain: Benzene, Toluene, Xylene. Chapter 4 of the DOE's Office of Energy Efficiency and Renewable Energy (EERE) report ...
There are three xylenes and one ethylbenzene. The substances are: o-xylene (1,2-dimethylbenzene), m-xylene (1,3-dimethylbenzene ... p-xylene (1,4-dimethylbenzene) Ethylbenzene (not a true xylene but present in mixtures called "mixed xylenes") Styrene ...
... and xylene; and hydrogen for hydrotreating units. However, a hydroskimming refinery produces a surplus of fuel with a ...
Ortho-xylene in recycled styrene. Aromatics in hydrocarbons. Essential oil in alcohol-based essences. The bottle and the test ... doi:10.1021/ac60164a014 Roland P. Marquardt and E N. Luce (1944): "Determination of o-Xylene in Recycle Styrene", Industrial & ...
Manufacturers use xylenes to produce plastics and synthetic fibers. Synthesis gas is a mixture of carbon monoxide and hydrogen ... Song, Changyeol; Gim, Min Yeong; Lim, Yong Hyun; Kim, Do Heui (2019-09-01). "Enhanced yield of benzene, toulene, and xylene ... Aromatics includes benzene, toluene and xylenes, as a whole referred to as BTX and primarily obtained from petroleum refineries ... xylenes cyclohexane - a 6-carbon aliphatic cyclic hydrocarbon sometimes used as a non-polar solvent adipic acid - a 6-carbon ...
... and xylene (BETEX); methyl ethyl ketone (MEK); some metals. The prompt removal of a wide range of wastes and pollutants from ...
... and three xylenes. On the other hand, the second replacement (by the same substituent) may preserve or even increase the ...
It is also generated by methylation of toluene and xylenes. Record in the GESTIS Substance Database of the Institute for ...
Xylene is the most popular clearing agent. Macerating tissues is the process of separating the constituent cells of tissues. ...
"Xylene tanker runs aground on Clipperton Island". ReefTools.com. 22 February 2010. Retrieved 17 June 2012. "Eitzen tanker ... The 170 m (558 ft) ship contained xylene, a clear, flammable volatile liquid. All 19 crew members were reported safe, and the ...
The xylene ( a group of three dimethyl benzenes) in the BTX are similarly converted to benzene and methane. This requires ... The mixture of benzene, xylenes etc. is then purified in two distillation columns. The benzene is then stored in the tank farm ... BTX stands for Benzene, Toluene, and Xylene. BTX is a mixture of these chemical species plus many other species. Both liquids ...
doi:10.1021/ja00799a002 Pierluigi Giacomello and Fulvio Cacace (1976): "Gas-phase alkylation of xylenes by tert-butyl(1+) ions ... Remarkable selectivity of a gaseous, charged electrophile". (1976) "Gas-phase alkylation of xylenes by tert-butyl(1+) ions". ( ...
Benzonitrile is produced from toluene, and phthalonitriles are produced from xylenes. The reaction represents a partial ...
An example is the iodination of para-xylene. : A specific niche indium research topic is indium mediated allylation. C. ...
It was first described in the 1920s when its reactions with benzene and p-xylene were studied by Theodor Curtius and Karl ... on p-xylene". Berichte der Deutschen Chemischen Gesellschaft B. 55B: 1571-1581.{{cite journal}}: CS1 maint: multiple names: ...
This enzyme participates in toluene and xylene degradation. Forrester PI, Gaucher GM (1972). "m-Hydroxybenzyl alcohol ...
This enzyme participates in toluene and xylene degradation. Whited GM, McCombie WR, Kwart LD, Gibson DT (1986). "Identification ...
This enzyme participates in toluene and xylene degradation. Higson FK, Focht DD (1992). "Degradation of 2-methylbenzoic acid by ...
This enzyme participates in toluene and xylene degradation. It has 2 cofactors: FAD, and Cytochrome c. As of late 2007, 4 ...
Sediment was contaminated with benzene, bis phthalate, heptachlor, toluene, and total xylenes. Environmental pathways began to ... and xylenes. The on-site soil contained chlordane, chromium, lead, and PCB-1242. ...
It may also be produced by methylation of toluene, xylenes, and trimethylbenzenes. Griesbaum, Karl; Behr, Arno; Biedenkapp, ...
They have attracted attention because they can be used to separate xylenes. On a conceptual level, Hofmann clathrates can be ...
Exposure to xylene occurs in the workplace and when you use paint, gasoline, paint thinners and other products that contain it ... What is xylene?. There are three forms of xylene in which the methyl groups vary on the benzene ring: meta-xylene, ortho-xylene ... How can xylene affect children?. The effects of xylene have not been studied in children, but it is likely that they would be ... What happens to xylene when it enters the environment?. *Xylene evaporates quickly from the soil and surface water into the air ...
Exposure to xylene can irritate the eyes, nose, skin, and throat. Xylene can also cause headaches, dizziness, confusion, loss ... Workers may be harmed from exposure to xylene. ... Xylene is a colorless, flammable liquid with a sweet odor. ... Useful search terms for xylene include "meta-xylene," "m-xylene," "o-xylene," "p-xylene," and "xylidine." ... Xylene (C8H10) is a colorless, flammable liquid with a sweet odor. Exposure to xylene can irritate the eyes, nose, skin, and ...
Xylenes  Lundberg, P; Howe, Paul D; Dobson, Stuart; Crookes, M. J; World Health Organization; Inter-Organization Programme for ...
Toluene and xylene poisoning can occur when someone swallows these substances, breathes in their fumes, ... Toluene and xylene are strong compounds that are used in many household and industrial products. ... Toluene and xylene are strong compounds that are used in many household and industrial products. Toluene and xylene poisoning ... Below are symptoms of toluene and xylene poisoning in different parts of the body. ...
1997)‎. Xylenes. World Health Organization. https://extranet.who.int/iris/restricted/handle/10665/41928 ...
1330-20-7 - Xylenes (mixed). Short-Term Toxicity. *30 days (Inhalation) (C18035) On Test * Rats: Harlan Sprague-Dawley; Mice: ...
Xylenes (total). Find out what is in your tap water ... EWGs Tap Water Database Xylenes (total) results for Williamson ... Xylenes (total). Williamson County Wsid 3. Xylenes are solvents used in industrial and consumer products, such as cleaning ... The legal limit for xylenes, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. ... The EWG Health Guideline of 1,800 ppb for xylenes was defined by the California Office of Environmental Health Hazard ...
o-Xylene-3,6-diol *Molecular FormulaC8H10O2 ...
Industrial hygiene testing laboratory providing analysis of fixed gases, LEED Testing, VOCs, Formaldehyde, Metals, Solvents, MVOCs, Silica, Asbestos and other Chemicals.
Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers ...
This application note presents a TD-NMR method for the fast analysis of xylene soluble content in polypropylene. The method is ... This application note presents a TD-NMR method for the fast analysis of xylene soluble content in polypropylene. The method is ...
Like our regular CitriSolvTM, the CitriSolvTM Hybrid can be used as a safe alternative to xylene and ethyl acetate. It is ... Can be used as a safe alternative to xylene and ethyl acetate ... CitriSolv™ Xylene Substitute, Hybrid, Decon Labs Stains ...
In 2021, Top importers of Cyclic hydrocarbons; p-xylene from Vietnam were China ($288,814.94K , 339,225,000 Kg).. Cyclic ... Cyclic hydrocarbons; p-xylene. 2021. Vietnam. 288,814.94. 339,225,000. Kg. Other Asia, nes. Import. 290243. Cyclic hydrocarbons ... HS Code 290243: Cyclic hydrocarbons; p-xylene. Please note: Exports is gross exports and Imports is gross imports ...
cyclanes, cyclenes, benzene, toluene, xylenes, styrene, ethylbenzene and cumene) Commodity code: 29 02 90290290 * Cyclic ... cyclanes, cyclenes, benzene, toluene, xylenes, styrene, ethylbenzene and cumene) Commodity code: 29 02 90 0029029000 ... cyclanes, cyclenes, benzene, toluene, xylenes, styrene, ethylbenzene and cumene). This section is Commodity ...
3-Nitro-o-xylene ; physical and chemical property of 83-41-0, 3-Nitro-o-xylene is provided by ChemNet.com ... 3-Nitro-o-xylene. Synonyms. 1,2-Dimethyl-3-nitrobenzene; 2,3-Dimethylnitrobenzene; 3-nitro-ortho-xylene; 3-Nitro-4-Chloro-5- ... ChemNet , CAS , 83-41-0 3-Nitro-o-xylene. 83-41-0 3-Nitro-o-xylene. product Name. ... CAS No: 83-41-0, Chemical Name: 3-Nitro-o-xylene. Home , Products , Suppliers , Offer to Buy , Offer to Sell , Chemical News , ...
Mohanty, S. ; Davis, H. T. ; McCormick, A. V. / Sorbate/sorbent phase transition during adsorption of p-xylene in silicalite. ... Sorbate/sorbent phase transition during adsorption of p-xylene in silicalite. / Mohanty, S.; Davis, H. T.; McCormick, A. V. ... Mohanty, S, Davis, HT & McCormick, AV 2000, Sorbate/sorbent phase transition during adsorption of p-xylene in silicalite, ... Mohanty, S., Davis, H. T., & McCormick, A. V. (2000). Sorbate/sorbent phase transition during adsorption of p-xylene in ...
... provide Para Xylene 106-42-3 product and the products related with China Para Xylene 106-42-3 - myonghwa ... China Para Xylene 106-42-3 Suppliers and China Para Xylene 106-42-3 Manufacturers, ... Send your inquiry to Para Xylene supplier. Enter your inquiry here and then click Send. Enter between 20 to 3,000 characters, ...
Title: Evaluating the Effects of Metal Adduction and Charge Isomerism on Ion-Mobility Measurements using m -Xylene Macrocycles ... Xylene Macrocycles as Models". Journal of the American Society for Mass Spectrometry 33 (5). Country unknown/Code not available ... Xylene Macrocycles as Models. Journal of the American Society for Mass Spectrometry, 33 (5). Retrieved from https://par.nsf.gov ... Xylene Macrocycles as Models. Retrieved from https://par.nsf.gov/biblio/10340638. Journal of the American Society for Mass ...
Photolysis Kinetics of Toluene, Ethylbenzene, and Xylenes at Ice Surfaces. Journal of Physical Chemistry A. 2016 Sep 1;120(34): ... Photolysis Kinetics of Toluene, Ethylbenzene, and Xylenes at Ice Surfaces. Alexa A. Stathis, Albanie K. Hendrickson-Stives, ... Stathis, A. A., Hendrickson-Stives, A. K., & Kahan, T. F. (2016). Photolysis Kinetics of Toluene, Ethylbenzene, and Xylenes at ... Photolysis Kinetics of Toluene, Ethylbenzene, and Xylenes at Ice Surfaces. / Stathis, Alexa A.; Hendrickson-Stives, Albanie K ...
... and the three xylene isomers). Crystal structures of the three host:guest materials MIL-53(Fe)[xylene], where xylene = the ... Upon thermal treatment, xylenes are partially lost to give crystalline phases MIL-53(Fe)[xylene]0.5, the structures of which ... is able to separate the three xylene isomers with elution of the para-xylene before the other two isomers, and at 323 K the ... The kinetics of uptake of each xylene by MIL-53(Fe)[H2O], in which the water is replaced by the organic guest, have been ...
Various factors were found to affect the performance of MFI-type zeolite membranes in separating xylene isomers (p-xylene, PX; ... N2 - Various factors were found to affect the performance of MFI-type zeolite membranes in separating xylene isomers (p-xylene ... AB - Various factors were found to affect the performance of MFI-type zeolite membranes in separating xylene isomers (p-xylene ... keywords = "MFI-type zeolite membranes, Microstructure, Pervaporation, Xylene separation, p-Xylene loading", ...
27, Pages 5139: Continuous-Flow Synthesis of Nitro-o-xylenes: Process Optimization, Impurity Study and Extension to Analogues ... 27, Pages 5139: Continuous-Flow Synthesis of Nitro-o-xylenes: Process Optimization, Impurity Study and Extension to Analogues ( ... An efficient continuous-flow nitration process of o-xylene at pilot scale was demonstrated. The effects of parameters such as ... The method was also successfully applied to the nitrification of p-xylene, toluene, and chlorobenzene with good yields. ...
Xylenes. Contributor(s): Lundberg, P , Howe, Paul D , Dobson, Stuart , Crookes, M. J , World Health Organization , Inter- ... Xylenes -- adverse effects -- toxicity , Environmental exposure , Chemical Toxicology and CarcinogenicityNLM classification: QD ...
Indian domestic market has been continuously witnessing a marginal uptrend in the m-Xylene values. The growing demand from the ... Indias m-Xylene Offers Stagger Upwards In Rangebound. *. 18-Aug-2022 5:47 PM ... The price of m-Xylene in the Indian domestic market increased by 0.3% on 12th August, backed up by the erratic upstream Crude ... Indias IPA and m-Xylene Maintain Price Hikes Buoyed by Prevailing Market Uncertainties *. 07-Aug-2020 11:00 AM ...
Xylene-Induced Auditory Dysfunction in Humans. Author:. Fuente A, McPherson B, and Cardemil F. Year:. 2% ...
Xylenes. Sort by. Sort by: Best selling. Sort by Best selling Alphabetically, A-Z Alphabetically, Z-A Price, low to high Price ...
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  • Toluene and xylene are strong compounds that are used in many household and industrial products. (medlineplus.gov)
  • Toluene and xylene poisoning can occur when someone swallows these substances, breathes in their fumes, or when these substances touch the skin. (medlineplus.gov)
  • Other products may also contain toluene and xylene. (medlineplus.gov)
  • Below are symptoms of toluene and xylene poisoning in different parts of the body. (medlineplus.gov)
  • However, the photolysis of toluene, ethylbenzene, and xylenes (TEX) at ice surfaces has not been investigated. (syr.edu)
  • rate constants were (4.5 ± 0.5) × 10 -4 s -1 (toluene), (5.4 ± 0.3) × 10 -4 s -1 (ethylbenzene), and (3.8 ± 1.2) × 10 -4 s -1 (xylenes). (syr.edu)
  • We report a study of the use of the porous metal-organic framework material MIL-53(Fe), FeIII(OH)0.8F0.2[O2C-C6H4-CO2], for the separation of BTEX mixtures (benzene, toluene, ethylbenzene, and the three xylene isomers). (warwick.ac.uk)
  • The method was also successfully applied to the nitrification of p-xylene, toluene, and chlorobenzene with good yields. (myjournals.org)
  • Xylene occurs in the manufacture of different petroleum products and as an impurity in benzene and toluene. (chemicalbook.com)
  • The study presents the levels of air pollution by aromatic organic compounds BTEX (benzene, toluene, ethylbenzene, o-, m-, and p-xylenes) in the city of Algiers. (radiello.com)
  • Xylene I believe is better than toluene. (sciencemadness.org)
  • 5. One or all of the BTEX (i.e. organic chemicals Benzene, Toluene, Ethylbenzene and Xylenes) compounds were found at all drilling sites-which is similar to what other studies have reported. (cdc.gov)
  • Non toxic - Xylene & Toluene free. (pioneerofficenational.com)
  • BTEX stands for Benzene, Toluene, Ethylbenzene and Xylene. (gaspro.ca)
  • Members of the genus Pseudomonas are known to be widespread in hydrocarbon contaminated environments because of their remarkable ability to degrade a variety of petroleum hydrocarbons, including BTEX (benzene, toluene, ethylbenzene and xylene) compounds. (bvsalud.org)
  • It was capable of degrading benzene, toluene, meta- and para- xylene effectively under both aerobic and microaerobic conditions. (bvsalud.org)
  • Solvent xylene often contains a small percent of ethyl benzene. (datamintelligence.com)
  • 1,2-dimethyl-benzene ( o-xylene) 2-Methyltoluene 3,4-Xylene Benzene, 1,2-dimethyl- NSC 60920 o-Dimethylbenzene o-Methyltoluene o-Xylol ortho-Xylene ω : Acentric Factor. (festivaldimedicina.it)
  • Xylene is benzene to which two methyl groups have been added to two carbon atoms in the benzene ring. (chemicalbook.com)
  • The NASA Clean Air study found that many houseplants can clean the air of toxins such as formaldehyde, benzene, trichloroethylene, xylene and ammonia, says podcaster and garden expert Ellen Mary, who recently launched People Plants Wellbeing, a new nature-based wellbeing consultancy. (rte.ie)
  • meta -xylene, ortho -xylene, and para -xylene ( m -, o -, and p -xylene). (cdc.gov)
  • It is a mixture composed of three isomers of 45%~70% meta-xylene, 15%~25% para-xylene and 10%~15% o-xylene. (allwaychemical.com)
  • Based on the type, the global xylene market is broadly segmented as ortho xylenes, para xylenes, meta xylenes, and mixed xylenes. (datamintelligence.com)
  • An analytically solvable lattice model was used to study the difference in the physics of p-xylene adsorption in ORTHO and PAPA phases of silicalite. (umn.edu)
  • Crystal structures of the three host:guest materials MIL-53(Fe)[xylene], where xylene = the ortho, meta, or para isomer of dimethylbenzene, have been solved and refined from powder X-ray diffraction. (warwick.ac.uk)
  • While the ortho- and meta- isomers present a similar arrangement when occluded in the MIL-53 host, the para-xylene shows a distinctly different set of interactions with the host. (warwick.ac.uk)
  • Ortho-xylene has methyl groups on consecutive carbons in the ring, meta-xylene's metyl groups are separated by a single carbon bonded to hydrogen atoms, and para-xylene has the methyl groups on carbon atoms on opposite sides of the ring. (chemicalbook.com)
  • We are a dealer and importer of Ortho Xylene. (hridaanpharmachem.com)
  • Among monoaromatic hydrocarbons , xylenes , especially the ortho and para isomers, are the least biodegradable compounds in oxygen -limited subsurface environments . (bvsalud.org)
  • Exposure to xylene as solvents (in paints or gasoline) can be reduced if the products are used with adequate ventilation and if they are stored in tightly closed containers out of the reach of small children. (cdc.gov)
  • Xylenes are solvents used in industrial and consumer products, such as cleaning agents and paint thinners. (ewg.org)
  • In the petroleum industry, xylene is also a frequent component of paraffin solvents, used when the tubing becomes clogged with paraffin wax. (chemicalbook.com)
  • Methyl-chloroform (71556) and xylene (1330207) are found in concentrations far below generally accepted standards for workroom air, a low proportion of workers having reported symptoms which could be attributed to exposure to these solvents. (cdc.gov)
  • Processable in non-halogenated solvents such as o-xylene, TMB and mesitylene. (brilliantmatters.com)
  • It is one of the three isomers of dimethylbenzene known collectively as xylenes. (masminaturalcotton.eu)
  • Also known as dimethylbenzene, C6H4(CH3)2 is an isomeric mixture of 0- m-, and p-xylene. (chemicalbook.com)
  • Xylene is any one of three isomers of dimethylbenzene. (apexpharmachem.com)
  • O'Brien-Abraham, J, Kanezashi, M & Lin, J 2008, ' Effects of adsorption-induced microstructural changes on separation of xylene isomers through MFI-type zeolite membranes ', Journal of Membrane Science , vol. 320, no. 1-2, pp. 505-513. (elsevier.com)
  • Xylene is a colorless, sweet-smelling liquid that catches on fire easily. (cdc.gov)
  • Xylene (C 8 H 10 ) is a colorless, flammable liquid with a sweet odor. (cdc.gov)
  • Under chromatographic conditions in heptane at 293 K, anhydrous MIL-53(Fe) is able to separate the three xylene isomers with elution of the para-xylene before the other two isomers, and at 323 K the host is able to resolve all components of the BTEX mixture. (warwick.ac.uk)
  • Though several members of the genus Pseudomonas are well known for their aerobic BTEX degradation capability, this is the first report of a novel Pseudomonas species capable of degrading xylene under microaerobic conditions. (bvsalud.org)
  • Xylene is used as a solvent and in the printing, rubber, and leather industries. (cdc.gov)
  • Xylene is used as a solvent. (chemicalbook.com)
  • Solvent xylene often contains a small percentage of ethylbenzene. (chemicalbook.com)
  • In this application, the mixture of isomers is often referred to as xylenes or xylol. (chemicalbook.com)
  • Included amongst these ingredients is the chlorazol black stain, 95% alcohol, carbol-xylol, xylene, a mounting medium, a pair of tweezers, and a box of coverslips. (cdc.gov)
  • If products containing xylene are spilled on the skin, then the excess should be wiped off and the area cleaned with soap and water. (cdc.gov)
  • We do not know if xylene harms the unborn child if the mother is exposed to low levels of xylene during pregnancy. (cdc.gov)
  • Measurement of blood levels of xylene is general population result from contact properties, are rapidly absorbed by all limited by the rapid metabolism of with consumer products containing routes of exposure, rapidly distributed xylene. (cdc.gov)
  • No data are available on levels of xylene and Disease Registry concentrations of xylene in blood or in soil. (cdc.gov)
  • The effects of xylene have not been studied in children, but it is likely that they would be similar to those seen in exposed adults. (cdc.gov)
  • The primary effects of xylene exposure with a somewhat sweet odor. (cdc.gov)
  • The capacity and selectivity of the metal-organic framework MIL-47 for liquid phase adsorption are shown to heavily depend on the pretreatment of the material, as illustrated in detail by the particular case of selective xylene adsorption . (rsc.org)
  • The kinetics of uptake of each xylene by MIL-53(Fe)[H2O], in which the water is replaced by the organic guest, have been studied using time-resolved energy-dispersive X-ray diffraction: this shows differences in kinetics of the adsorption of the three isomers. (warwick.ac.uk)
  • Musk xylene is a C-nitro compound that is m-xylene bearing three nitro substituents at positions 2, 4 and 6 as well as a tert-butyl group at position 5. (masminaturalcotton.eu)
  • for factory musk xylene Our corporation maintains risk-free enterprise combined by truth and honesty to maintain long-term interactions with our clients. (muskxylol.com)
  • By totally removing the uncoordinated terephthalic acid from the pores and simultaneously avoiding oxidation to nonporous V 2 O 5 , pore volume and uptake of xylenes can be maximized. (rsc.org)
  • The presence of uncoordinated terephthalic acid in the pores improves the selectivity between p - and m -xylene . (rsc.org)
  • Additionally, para-xylenes are used in the manufacture of PTA (purified terephthalic acid), a basic petrochemical majorly used in the textile industry for the production of polyester. (datamintelligence.com)
  • NIOSHTIC-2 search results for xylene -NIOSHTIC-2 is a searchable database of worker safety and health publications, documents, grant reports, and journal articles supported in whole or in part by NIOSH. (cdc.gov)
  • Exposure to xylene occurs in the workplace and when you use paint, gasoline, paint thinners and other products that contain it. (cdc.gov)
  • How can families reduce the risks of exposure to xylene? (cdc.gov)
  • Workers may be harmed from exposure to xylene. (cdc.gov)
  • The following resources provide information about occupational exposure to xylene. (cdc.gov)
  • People who work or live near industrial involves mixed function oxidases in the settings may receive a higher exposure to liver, resulting mainly in the formation of Typical concentrations of xylene in xylenes. (cdc.gov)
  • Applied Toxicology Branch industries using xylene as a raw material, reported in urban and rural drinking or employed in the petroleum industry, water wells or monitoring wells in the may be at higher risk of exposure. (cdc.gov)
  • This limit may not fully protect against harm to the brain and nervous system due to xylene exposure. (ewg.org)
  • XYLENE WEL 50 ppm 220 mg/m3 100 ppm 441 mg/m3 Sk WEL = Workplace Exposure Limit. (infermieriassistenzaligure.it)
  • Although much knowledge has been gained regarding the anaerobic degradation of xylene isomers in the past 2 decades, the diversity of those bacteria which are able to degrade them under microaerobic conditions is still unknown. (bvsalud.org)
  • Aerobic and microaerobic xylene -degradation experiments were conducted on strains Sphingobium sp. (bvsalud.org)
  • During an enrichment investigation which aimed to study microaerobic xylene degradation in a legacy petroleum hydrocarbon-contaminated groundwater, a novel Gram-stain-negative, aerobic, motile and rod-shaped bacterial strain, designated as MAP12T was isolated. (bvsalud.org)
  • Chemical industries produce xylene from petroleum. (cdc.gov)
  • Xylene occurs naturally in petroleum and An MRL of 0.6 ppm has been derived for xylene volatilizes into the atmosphere, at lower concentrations. (cdc.gov)
  • Xylene occurs naturally in petroleum and coal tar. (chemicalbook.com)
  • If you work in an industry that uses xylene, please read chemical labels and the accompanying Safety Data Sheets for hazard information. (cdc.gov)
  • SDS Xylenes (Certified ACS), Fisher Chemical™ 1L, Glass Bottle Quantity: 500mL 1L 1 gal. (infermieriassistenzaligure.it)
  • SDS Xylenes (Histological), Fisher Chemical™ 50L, BasicPak (Rented) Quantity: 1 gal. (infermieriassistenzaligure.it)
  • It provides basic scientific risk evaluation of a wide range of chemicals and groups of chemicals (from Acetaldehyde to Xylenes), and information related to the physical and chemical properties and an. (bvsalud.org)
  • Xylene is an aromatic hydrocarbon obtained by catalytic reforming and coal carbonization process during the production of coke fuel. (datamintelligence.com)
  • p-Xylene (para-xylene) is an aromatic hydrocarbon. (masminaturalcotton.eu)
  • Overall, it was concluded that the observed differences between the bacterial communities of aerobic and microaerobic xylene -degrading enrichments were driven primarily by (i) the method of aromatic ring activation (monooxygenation vs dioxygenation), (ii) the type of EDO enzymes , and (iii) the ability of degraders to respire utilizing nitrate . (bvsalud.org)
  • To overcome this limitation, aerobic and microaerobic xylene -degrading enrichment cultures were established using groundwater taken from a xylene -contaminated site, and the associated bacterial communities were investigated using a polyphasic approach. (bvsalud.org)
  • Our results show that the xylene -degrading bacterial communities were distinctly different between aerobic and microaerobic enrichment conditions. (bvsalud.org)
  • Also, xylene is used as an important raw material in the manufacture of plasticizers, glass-reinforced polyesters, and alkyd resins. (chemicalbook.com)
  • Xylene evaporates quickly from the soil and surface water into the air. (cdc.gov)
  • Xylene evaporates and burns easily. (cdc.gov)
  • The addition of two methyl groups gives three isomers of xylene labeled according to the relative positions of the methyl groups. (chemicalbook.com)
  • Working in a job that involves the use of xylene such as painters, paint industry workers, biomedical laboratory workers, automobile garage workers, metal workers, and furniture refinishers. (cdc.gov)
  • Xylenes SDS Safety Data Sheet for Xylenes 108633 Material Safety Data Sheet or SDS for Xylenes 108633 from Merck for download or viewing in the browser. (infermieriassistenzaligure.it)
  • Studies of unborn animals indicate that high concentrations of xylene may cause increased numbers of deaths, and delayed growth and development. (cdc.gov)
  • Click the button below to add the Xylene, Gas Detector Tubes to your wish list. (mathesongas.com)
  • Para-xylene is used to manufacture chemicals which are used in the production of polyester fibers and PET. (datamintelligence.com)
  • Various isomers of xylene are also used as a precursors for polyester fabric, tear gas, and other chemicals. (chemicalbook.com)
  • Using optimally pretreated MIL-47 as adsorbent for xylene, ethyltoluene , dichlorobenzene , toluidine or cresol isomers, the para -isomer is in each case preferred over the meta -isomer in pulse chromatographic and batch experiments. (rsc.org)
  • An efficient continuous-flow nitration process of o-xylene at pilot scale was demonstrated. (myjournals.org)
  • The legal limit for xylenes, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. (ewg.org)
  • It is owing to the shift in xylene manufacturing bases to emerging economies of India and China owing to the availability of inexpensive labor. (datamintelligence.com)
  • Additionally, China & India is anticipated to be major consumer of xylene on account of the growing demand for pesticides in the agricultural sector over the forecast period. (datamintelligence.com)
  • Both the International Agency for Research on Cancer (IARC) and the EPA have found that there is insufficient information to determine whether or not xylene is carcinogenic. (cdc.gov)