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ethylbenzene/dichloromethane
Veza se sprema u međuspremnik
Stranica 1 iz 36 rezultatima
Assessing human variability in kinetics for exposures to multiple environmental chemicals: a physiologically based pharmacokinetic modeling case study with dichloromethane, benzene, toluene, ethylbenzene, and m-xylene.
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The objective of this study was to compare the magnitude of interindividual variability in internal dose for inhalation exposure to single versus multiple chemicals. Physiologically based pharmacokinetic models for adults (AD), neonates (NEO), toddlers (TODD), and pregnant women (PW) were used to
Determination of benzene, toluene, ethylbenzene and xylene in river water by solid-phase extraction and gas chromatography.
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A rapid and reproducible method is described that employs solid-phase extraction (SPE) using dichloromethane, followed by gas chromatography (GC) with flame ionization detection for the determination of benzene, toluene, ethylbenzene, xylene and cumene (BTEXC) from Buriganga River water of
Physiologically based modeling of the maximal effect of metabolic interactions on the kinetics of components of complex chemical mixtures.
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The objective of this study was to predict and validate the theoretically possible, maximal impact of metabolic interactions on the blood concentration profile of each component in mixtures of volatile organic chemicals (VOCs) [dichloromethane (DCM), benzene (BEN), trichloroethylene (TCE), toluene
Gene expression profiles of human promyelocytic leukemia cell lines exposed to volatile organic compounds.
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Benzene, toluene, o-xylene, ethylbenzene, trichloroethylene and dichloromethane are the most widely used volatile organic compounds (VOCs), and their toxic mechanisms are still undefined. This study analyzed the genome-wide expression profiles of human promyelocytic leukemia HL-60 cells exposed to
Identification of characteristic molecular signature for volatile organic compounds in peripheral blood of rat.
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In a previous report we demonstrated that the transcriptomic response of liver tissue was specific to toxicants, and a characteristic molecular signature could be used as an early prognostic biomarker in rats. It is necessary to determine the transcriptomic response to toxicants in peripheral blood
Carbon functionalized mesoporous silica-based gas sensors for indoor volatile organic compounds.
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Indoor organic gaseous pollution is a global health problem, which seriously threats the health and life of human all over the world. Hence, it is important to fabricate new sensing materials with high sensitivity and efficiency for indoor volatile organic compounds. In this study, a series of
Chemicals studied and evaluated in long-term carcinogenesis bioassays by both the Ramazzini Foundation and the National Toxicology Program: in tribute to Cesare Maltoni and David Rall.
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The Ramazzini Foundation (RF) in Bentivoglio, Italy and the National Toxicology Program (NTP) in Research Triangle Park, North Carolina have carried out several hundred chemical carcinogenesis bioassays: 200 by RF and 500 by NTP. Of these, 21 have been evaluated by both laboratories. The 14
[Pollution Characteristics and Health Risk Assessment of Volatile Organic Compounds in Baiyangdian Lake].
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In order to survey the present pollution from volatile organic compounds in Baiyangdian Lake, 15 water samples were collected in March 2016, and analyzed for 54 VOCs by purge and trap gas chromatography-mass spectrometry. The distribution characteristics and health risk assessments were
Preparation of needle trap samplers to extract air compounds from indoor electric-vaporizing sources.
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In this study, gaseous benzene, toluene, ethylbenzene, and o-xylene (BTEX) were extracted by passive needle trap samplers (NTS) using divinylbenzene (DVB) particles (mesh sizes 60-80, 80-100, and 100-120, respectively) as packed sorbents. An aspirating pump measured sampling flow rates of NTS, and
Analysis of volatile organic compounds in pleural effusions by headspace solid-phase microextraction coupled with cryotrap gas chromatography and mass spectrometry.
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Headspace solid-phase microextraction coupled with cryotrap gas chromatography and mass spectrometry was applied to the analysis of volatile organic compounds in pleural effusions. The highly volatile organic compounds were separated successfully with high sensitivity by the employment of a cryotrap
A validated GC-MS method for the determination and quantification of residual solvents in counterfeit tablets and capsules.
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A fast headspace GC-MS method was developed and validated for the detection and quantification of residual solvents of all three ICH-classes in counterfeit tablets and capsules. The method was validated for 10 solvents, selected based on an initial screening of counterfeit medicinal products. The
Characteristics of exhaust gas, liquid products, and residues of printed circuit boards using the pyrolysis process.
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BACKGROUND
The pyrolytic method was employed to recycle metals and brominated compounds blended into printed circuit boards (PCBs).
METHODS
PCBs were crushed into pieces 4.0-4.8 mm in size, and the crushed pieces were pyrolyzed at temperatures ranging from 200 to 500 degrees C. The compositions of
Polydopamine-assisted immobilization of a zinc(II)-derived metal-organic cage as a stationary phase for open-tubular capillary electrochromatography.
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A capillary column was modified with a soluble zinc(II)-derived metal-organic cage (MOC) [Zn2L] as the stationary phase to obtain a new coating layer for use in open-tubular capillary electrochromatography. The inner surface of the capillary was first coated with a layer of polydopamine.
Stoichiometric reactions and catalytic hydrogenation with a reactive intramolecular Zr(+)/amine frustrated Lewis pair.
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Methyl anion abstraction from Cp*2Zr(CH3)OCH2CH2N(i)Pr2 (13) with trityl cation generates [Cp*2Zr(OCH2CH2N(i)Pr2)](+) (14). Complex 14 behaves as a reactive Zr(+)/amine frustrated Lewis pair (FLP). It reacts with dichloromethane to give the [Zr]Cl[OCH2CH2N(CH2Cl)(i)Pr2](+) cation (15), it slowly
Solid phase microextraction and gas chromatography-mass spectrometry methods for residual solvent assessment in seized cocaine and heroin.
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A simple sample pre-treatment method based on solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) has been optimized and validated for the assessment of 15 residual solvents (2-propanol, 2-methylpentane, 3-methylpentane, acetone, ethyl acetate, benzene, hexane,
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