نتایج جستجو برای: including benzene
تعداد نتایج: 991227 فیلتر نتایج به سال:
Introduction & Objective: BTEX compounds (Benzene, Toluene, Ethylbenzene, Xylene iso-mers) are among the most consumed and dangerous volatile organic compounds which can cause adverse health effects in humans. The water pipe smoke contains numerous toxic compounds such as BTEX compounds.The aim of this study was to evaluate the personal exposure to BTEX compounds at traditional restaurants of H...
Background: Exposure to some volatile organic compounds such as benzene, toluene, ethyl benzene and xylene cause adverse effects on organs and nervous system and moreover causes spread of diseases such as cancer , leukemia which would result in increasing medical expenses. This study is aimed to detect and measure BTEX (benzene, toluene, ethylbenzene and xylene) in air and compare it with reco...
Purpose: Study of benzene effects on kidney structure in mammals (mouse). Materials and Methods: The mice were studied in 3 groups: controls, solvent and treatment, at favorable laboratory conditions. Treatment mice were administered orally of benzene (0.1cc of benzene solution) for 10 days at a dose 1000 mg/kg of body weight. At the end of each period, the kidneys separated and fixed in paraf...
A novel complex absorbent composed of polyethylene glycol 200 (PEG200) and ionic liquids (ILs) was prepared for the absorption volatile organic compounds (VOCs) such as dichloromethane (DCM) benzene. We absorbents [EMIM][Cl], [BMIM][Cl], [HMIM][Cl], [BMIM][BF4], [BMIM][PF6], [BMIM][NTF2], PEG200, respectively, studied properties these six DCM The results show that under optimized situation, abs...
OBJECTIVE To evaluate the relations between environmental benzene concentrations and various biomarkers of exposure to benzene. METHODS Analyses were carried out on environmental air, unmetabolised benzene in urine, trans, trans-muconic acid (ttMA), and three major phenolic metabolites of benzene; catechol, hydroquinone, and phenol, in two field studies on 64 workers exposed to benzene concen...
The title monohydrate, C9H10N2O3·H2O, contains an aziridine ring including two contiguous stereocenters, both of which exhibit an R configuration. The methyl-hydroxy and nitro-phenyl groups are cis-disposed about the aziridine ring. The mean plane of the benzene ring is tilted to the aziridine ring by 66.65 (8)°. The nitro group is nearly coplanar with the benzene ring [dihedral angle = 2.5 (2)...
Abstract In the present study, liquid viscosity and surface tension of benzene was determined at saturation conditions from light scattering (SLS) experiments between (283 393) K. Based on application hydrodynamic theory for fluctuations vapor–liquid phase boundary which successfully validated by measurements, a simultaneous determination with average relative expanded uncertainties ( k = 2) (1...
A combined experimental and kinetic modeling study is carried out to explore the influences of added acetylene, ethylene, propylene, propyne on reaction schemes benzene pyrolysis. Pyrolysis with without presence C2- or C3- unsaturated hydrocarbons (HCs) conducted in a single pulse shock tube coupled gas chromatography-mass spectrometry technique. minimum 30 species detected each system, their m...
We previously reported evidence that humans metabolize benzene via two enzymes, including a hitherto unrecognized high-affinity enzyme that was responsible for an estimated 73% of total urinary metabolites [sum of phenol (PH), hydroquinone (HQ), catechol (CA), E,E-muconic acid (MA), and S-phenylmercapturic acid (SPMA)] in nonsmoking females exposed to benzene at sub-saturating (ppb) air concent...
Anaerobic activation of benzene is expected to represent a novel biochemistry of environmental significance. Therefore, benzene metabolism was investigated in Geobacter metallireducens, the only genetically tractable organism known to anaerobically degrade benzene. Trace amounts (<0.5 μM) of phenol accumulated in cultures of Geobacter metallireducens anaerobically oxidizing benzene to carbon di...
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