MFI zeolite membranes, especially b-oriented ones, show superb vapor permeation/separation performance for xylene isomer separation at low pressures. In industrial applications these membranes should be operated high pressures in the mode or with liquid feed pervaporation mode. This paper reports influence of activity on and membranes. High quality were synthesized an organic template modified ...

Background & objectives: Xylene, which can pollute the water sources, is widely used as a solvent in insecticide manufacture, dye and leather and other industries. Adsorption is one of the most common processes used to treat the contaminated aqueous solutions by xylene. Therefore, the aim of this study was to compare the xylene removal efficiency and adsorption isotherms of magnetic nanoparticl...

The effects of experimental exposure to toluene (100 ppm), xylene (100 ppm) and their mixture (50 ppm of toluene and 50 ppm of xylene) on CNS functions were studied in 10 male volunteers aged 22-35. Changes in CNS functions were measured by means of nine psychological tests. Acute exposure to xylene produced the most adverse effect on simple reaction time SRT and choice reaction time ChRT. Expo...

Characteristic speciation of airborne volatile organics in Kaohsiung, the largest industrial city in Taiwan, is present in this paper. Hourly concentration of airborne volatile organic compounds (VOCs) was monitored by on-line GC/FID and 3 hours-averaged sample was parallel conducted by canister during rush hour. Field sampling works were conducted at a traffic station (Qian-Jin) and an industr...

Absorption of m-xylene and excretion of m-methylhippuric acid were investigated under controlled conditions in ten volunteers aged 17-33 years. They were exposed to m-xylene vapours at concentrations of 100, 300, and 600 mg/m3. It was found that m-xylene vapour retained in the lungs tended to decrease at the end of the exposure. An exposure test was devised, based upon the results obtained duri...

To determine the relationship between the oral ingestion volume of xylene and methyl hippuric acid (MHA) in urine, we measured MHA in 11 patients whose ingested xylene volume was identified. The best-fit equation between urine MHA and ingested amount of xylene was as follows: y (ingested amount of xylene, mL/kg) = -0.052x² + 0.756x (x = MHA in urine in g/g creatinine). From this equation, we es...

The initial enzymatic steps in anaerobic m-xylene oxidation were studied in Azoarcus sp. strain T, a denitrifying bacterium capable of mineralizing m-xylene via 3-methylbenzoate. Permeabilized cells of m-xylene-grown Azoarcus sp. strain T catalyzed the addition of m-xylene to fumarate to form (3-methylbenzyl)succinate. In the presence of succinyl coenzyme A (CoA) and nitrate, (3-methylbenzyl)su...

The effects of chronic exposure to xylene on cognitive ability were studied in a group of 35 medical workers occupationally exposed to low-level concentrations of xylene for at least five years by using event-related potentials (ERPs), and compared with a control group of 21 subjects. The exposure to xylene was confirmed through determination of m-methylhippuric acid, a reliable biological indi...

Capsicum and garlic were extracted in xylene. The obtained extracts were used to prepare four emulsifable concentrates "EC's". Formula A "capsicum xylene extract + emulsifier", Formula B "garlic xylene extract + emulsifier", Formula C "capsicum xylene extract in boiled linseed oil + emulsifier" and Formula D "garlic xylene extract in boiled linseed oil + emulsifier ". All prepared formulations ...