varying degrees of water solubility. Some additives (e.g., methyl tertiary-butyl ether and alcohols) are highly soluble. Other components (e.g., benzene, toluene, ethylbenzene, and xylenes) are slightly soluble. Many components (e.g., ndodecane and n-heptane) have relatively low water solubility under ideal conditions. Physical and chemical properties which affect transport and fate of selected...

In this study, batch experiments were carried out to investigate the effectiveness of persulfate (PS) as an oxidant agent remediate benzene, toluene, ethylbenzene, and xylenes (BTEX) in saline environments at high water temperatures (30 °C). This hydrological setting is quite common contaminated groundwater aquifers Middle Eastern countries. general, increasing system temperature from 10 30 °C ...

Little is known about the metabolism in the animal body of monoalkylbenzenes other than toluene and ethylbenzene (cf. Williams, 1947). The information available suggests that the n-alkyl side chains undergo w-oxidation followed by $-oxidation of the terminology (Rules of Carbohydrate Nomenclature, J. chem. Soc., 1952, p. 5108), glucosiduronic acids) andthe alcohols asnon-reducing glucuronides. ...

Styrene has been found to be toxic to the respiratory system, and the toxicity of styrene is metabolism-dependent. CYP2E1 is suggested to be one of the cytochrome P450 enzymes responsible for the bioactivation of styrene. Our work focused on the roles of CYP2E1 and epoxide, a metabolite of styrene epoxidation, in the cytotoxicity of styrene. Styrene was found to be more toxic to h2E1 cells than...

In this study, we aimed to evaluate the relationship between individual total exposure to air pollution and airway changes in a group of 51 wheezing children. Respiratory status was assessed four times (January 2006, June 2006, January 2007 and June 2007) during a 1-week period through a standardised questionnaire, spirometry, exhaled nitric oxide fraction and pH in exhaled breath condensate (E...

background: benzene, toluene, ethylbenzene and xylene (btex) are the most important toxic volatile compounds in the air and could be easily absorbed through the respiratory tract. in recent years, the risk of exposure to btex compounds, especially benzene as a carcinogen, has been considered in petroleum depot stations. objective: to assess the occupational exposure of petroleum depot workers i...